High-efficiency biomass stove with advanced combustion, thermoelectric power generation, energy recovery, and safety features

Abstract

This invention describes a high-efficiency biomass stove aimed at reducing indoor air pollution, optimizing fuel consumption, and providing basic household energy solutions The stove features an advanced combustion chamber with a mechanical air-fuel ratio control system that dynamically adjusts airflow based on biomass type, ensuring efficient and low-emission operation. A smart fuel sensing system automates combustion parameters for varied biomass fuels, enhancing ease of use. The invention incorporates a thermoelectric generator to convert waste heat into electricity, stored in an integrated battery bank for powering devices via USB and DC outlets. A waste heat recovery system enables secondary applications, including water heating and crop drying, while the modular design supports interchangeable cooking surfaces and auxiliary attachments. Safety mechanisms such as insulated surfaces, automatic shut-off features, and self-cleaning ash removal ensure user protection. The invention promotes environmental sustainability and improved quality of life for rural and underserved households.

Description

TITLEHigh-Efficiency Biomass Stove with Advanced Combustion, Thermoelectric Power Generation, Energy Recovery, and Safety Features.FIELD OF INVENTION

[0001] This invention relates to the field of mechanical engineering more particularly high-efficiency biomass stove designed for domestic and small-scale applications, addressing the challenges of indoor air pollution, fuel inefficiency, and limited energy access. It incorporates advanced combustion technologies to optimize the burning of various biomass fuels such as wood, agricultural residues, and dung, significantly reducing harmful emissions and enhancing fuel efficiency. It integrates a thermoelectric generator for converting waste heat into electricity, providing basic household energy needs, and features a modular design enabling adaptability for diverse functions, including cooking, water heating, and crop drying. The system includes smart fuel sensing for automated combustion adjustments, a waste heat recovery mechanism, and comprehensive safety features to ensure user protection. Designed for sustainability and versatility, the invention aims to improve living standards in rural and underserved communities while promoting environmental conservation.PRIOR ART AND PROBLEM TO BE SOLVED

[0002] Indoor air pollution, stemming from the widespread use of inefficient cooking methods, remains a pressing issue, particularly in rural and developing regions. Traditional cooking practices frequently involve the use of biomass stoves that burn wood, dung, or agricultural waste as fuel. These stoves are typically inefficient, leading to incomplete combustion, which releases a cocktail of harmful emissions, including carbon monoxide (CO), particulate matter (PM), and volatile organic compounds (VOCs). These pollutants significantly degrade indoor air quality, exposing users — primarily women and children — to severe health risks such as respiratory diseases, cardiovascular issues, and even premature death. According to the World Health Organization (WHO), indoor air pollution accounts for millions of deaths annually, underscoring the critical need for innovation in this field.

[0003] In addition to health concerns, traditional biomass stoves impose a heavy environmental toll. Their reliance on wood contributes to deforestation, soil degradation, and loss of biodiversity. The inefficient combustion process also releases greenhouse gases, exacerbating global climate change. Furthermore, collecting biomass fuel is a time-intensive and laborious task, often undertaken by women and children, which hinders educational and economic opportunities in affected communities.

[0004] Several solutions have been proposed to address the inefficiencies and environmental hazards of traditional biomass stoves, but they face significant limitations that hinder their effectiveness andwidespread adoption. Improved cookstoves, while designed to reduce fuel consumption and emissions, often fall short of achieving the performance levels necessary to fully mitigate health and environmental risks. Many models fail to ensure complete combustion, continuing to release harmful pollutants like particulate matter and carbon monoxide, thereby perpetuating indoor air quality issues. Additionally, the reduction in fuel usage achieved by these stoves is often modest, leaving the labor-intensive task of fuel collection and the associated deforestation concerns largely unaddressed.

[0005] Solar cookers, which rely on sunlight to generate heat for cooking, offer a renewable and eco- friendly solution. However, they are heavily weather-dependent and cannot provide a reliable cooking option during cloudy conditions or at night. Biogas systems, which convert organic waste into combustible gas, present another sustainable alternative but require significant infrastructure, maintenance, and a consistent supply of feedstock, making them impractical for many communities. While these prior art solutions have contributed to addressing some aspects of inefficient cooking practices, they fail to provide a comprehensive, scalable solution. The tradeoffs in efficiency, durability, affordability, and usability underscore the need for a more advanced, integrated system that can overcome the limitations of existing technologies while meeting the diverse needs of rural and underserved populations.

[0006] To resolve the above mentioned problem here a high-efficiency biomass stove is designed to address critical challenges in indoor air pollution, fuel consumption, and energy access in biomassdependent households. It employs advanced combustion technology with a mechanical air-fuel ratio control system, optimizing combustion for various biomass types. A smart fuel-sensing mechanism adjusts airflow automatically, reducing emissions and increasing fuel efficiency. The stove integrates a thermoelectric generator, providing electricity for basic needs like charging devices or powering LED lights. Its modular design supports multiple functionalities, including heating water and drying crops, with interchangeable cooking surfaces for versatility. Safety features such as automatic shut-off, child-proof locks, and insulated surfaces protect users, while a phase-change heat storage mechanism ensures sustained heat availability. Real-time monitoring displays fuel consumption, electricity generation, and emission levels, empowering users to optimize usage. The system’s durable and repairable design, coupled with waste heat recovery, offers a sustainable, user-friendly solution for mral households.THE OBJECTIVES OF THE INVENTION:

[0007] It has already been proposed that despite numerous efforts to address the inefficiencies and health hazards of traditional biomass stoves, existing solutions face several critical limitations that undermine their effectiveness and adoption. Improved cookstoves, which are designed to enhance fuel efficiency and reduce emissions, have shown only modest gains in practice. Many models fail to ensure complete combustion of biomass, leading to the continued release of harmful pollutants such as particulate matter and carbon monoxide. These emissions remain a significant healthhazard, particularly in poorly ventilated spaces where traditional stoves are used. Additionally, while some reduction in fuel consumption is achieved, it is often insufficient to significantly alleviate the burdens of fuel collection or curb deforestation in affected regions. User behavior and preferences also contribute to the limited success of these solutions. Many improved cookstoves are not compatible with traditional cooking methods, such as preparing certain types of bread or slow-cooking stews, which can deter users from adopting the technology. Additionally, a lack of awareness or understanding of the benefits of these stoves further hampers their acceptance. Alternatives such as solar cookers and biogas systems face similar challenges, as they often require significant behavioral adjustments, infrastructure, or resources that are not readily available in all communities. Finally, the scalability of existing solutions is a persistent problem. Distributing improved stoves and ensuring proper training for their use have proven logistically difficult, particularly in remote areas. Without consistent maintenance support and user engagement, many of these technologies fail to deliver long-term benefits. Collectively, these issues highlight the inadequacy of current solutions and the urgent need for innovative designs that are more efficient, affordable, durable, and user-friendly, while also addressing the energy demands of rural households.

[0008] The principal objective of the invention is a biomass stove that integrates multiple advanced features to address the challenges of indoor air pollution, fuel inefficiency, and limited access to basic household energy. The system incorporates smart fuel sensing technology for automatic adjustment of combustion parameters, a thermoelectric power generation module for converting waste heat into electricity, a modular design enabling multi-functional utility, a waste heat recovery mechanism for enhanced energy utilization, and comprehensive safety features, including automatic shut-off mechanisms and insulated surfaces, thereby ensuring a user-friendly, energy-efficient, and environmentally sustainable solution for rural and developing households.

[0009] Another objective of the invention is to implement a mechanical air-fuel ratio control system, utilizing temperature-responsive mechanisms such as bimetallic strips or shape memory alloys, to dynamically regulate airflow and ensure optimized combustion across various types of biomass fuels, including wood, dung, and agricultural residues.

[0010] The further objective of the invention is to incorporate an advanced fuel detection system that automatically identifies the type of biomass being used and adjusts combustion parameters, thereby minimizing user intervention, enhancing fuel efficiency, and reducing harmful emissions.

[0011] The further objective of the invention is to integrate a thermoelectric generator capable of converting waste heat into electrical energy, supplemented by a small battery bank, USB ports, and DC outlets for powering essential household devices such as LED lights or mobile chargers.

[0012] The further objective of the invention is to include a heat exchanger and phase-change material storage system that captures and stores waste heat for secondary applications, such as heating water, drying crops, or extending cooking operations post-combustion.

[0013] The further objective of the invention is to develop a modular framework for the stove, enabling customization with interchangeable cooking surfaces and optional attachments, such as crop dryers and water heating modules, to cater to diverse household needs.

[0014] The further objective of the invention is to integrate a user interaction interface, featuring realtime monitoring of fuel consumption, emissions, and electricity generation, with data accessible via mechanical displays or smartphone connectivity, empowering users to optimize stove performance.

[0015] The further objective of the invention is to incorporate advanced safety features, including automatic shut-off systems to prevent overheating, insulated surfaces to avoid accidental burns, child-proof locks, and a self-cleaning ash removal system to minimize manual maintenance.

[0016] The further objective of the invention is to ensure long-term usability and affordability by using locally sourced materials, providing easily replaceable modular components, and including a basic tool kit for routine maintenance tasks, thereby supporting regional manufacturing and reducing operational costs.

[0017] The further objective of the invention is to embed a mechanical data logger for tracking operational metrics such as fuel consumption, usage hours, and emission levels, enabling further improvements to the system and providing valuable data for environmental impact analysis by stakeholders.

[0018] The further objective of the invention is to address deforestation and greenhouse gas emissions caused by traditional biomass stoves through the integration of advanced combustion technologies and fuel efficiency optimizations, thereby reducing the ecological footprint of rural cooking systems.SUMMARY OF THE INVENTION

[0019] The issue of indoor air pollution and inefficient cooking practices persists despite various attempts to address the problem, revealing the complex and multifaceted nature of the challenge. One of the primary approaches has been the development of improved cookstoves (ICS), which aim to enhance combustion efficiency and reduce harmful emissions. While these stoves have brought some improvements, significant gaps remain. Many models fail to achieve complete combustion of biomass fuels, leading to continued release of particulate matter and toxic gases. Thisincomplete combustion not only undermines their health benefits but also fails to deliver the substantial fuel savings needed to alleviate deforestation and the burden of fuel collection.

[0020] Alternative cooking technologies, such as solar cookers and biogas systems, have been explored but come with their own limitations. Solar cookers, which use sunlight to heat food, are inherently dependent on weather conditions. They become ineffective on cloudy days or during the evening, making them unreliable for consistent household use. Biogas systems, which convert organic waste into usable fuel, require significant upfront investment and infrastructure. Their reliance on a steady supply of livestock or agricultural waste makes them impractical for many rural households, particularly in areas with resource scarcity or limited access to the necessary technical support.

[0021] The sociocultural dimensions of cooking practices further complicate the situation. In many communities, cooking is deeply rooted in tradition, with specific methods and fuel types used to prepare regional cuisines. Many improved cookstoves are incompatible with these traditional practices, deterring users from adopting the technology. For example, some models are unsuitable for cooking flatbreads or slow-simmering stews, which are staple methods in many cultures. Resistance to change, combined with a lack of awareness about the benefits of improved technologies, further limits their acceptance and use. Durability and maintenance are additional challenges that hinder the success of existing solutions. Many stoves and their components are exposed to harsh conditions, including high temperatures, soot, and corrosive gases, which degrade their performance over time. Frequent maintenance needs are difficult to meet in remote areas, where access to spare parts and technical support is often limited. This reduces the longevity and reliability of the stoves, leading to frustration among users and eventual abandonment of the technology.

[0022] These persistent challenges underscore the need for a more holistic approach to addressing inefficient cooking practices. A successful solution must strike a balance between improved combustion, meaningful electricity generation, and compatibility with traditional cooking methods. It must also be affordable, durable, and easy to maintain, ensuring that it can be widely adopted in resource-limited settings. Only by addressing these interrelated issues can the longstanding problems of indoor air pollution, energy scarcity, and environmental degradation be effectively resolved.

[0023] So here in this invention a high-efficiency biomass stove is designed to tackle indoor air pollution, excessive fuel consumption, and limited energy access in rural settings. Central to the design is an advanced combustion system featuring a mechanical air -fuel ratio control that optimizes airflow and combustion parameters based on the type of biomass used. Smart fuel-sensing technology enhances fuel efficiency and reduces emissions, while the integrated thermoelectric generator provides basic electricity for household needs. The stove’s modular design enables multi-purposeuse, with attachments for heating water, drying crops, and powering small tools. Safety features include automatic shut-off mechanisms, insulated surfaces, and child-proof locks to ensure safe operation. A phase-change material-based heat storage system captures excess heat for extended use, improving energy efficiency. The real-time monitoring system provides users with insights into fuel usage, emissions, and electricity generation. With its self-cleaning ash removal system, waste heat recovery, and user-friendly maintenance features, this stove offers an innovative, sustainable, and practical solution to traditional biomass stoves' shortcomings.DETAILED DESCRIPTION OF THE INVENTION

[0024] While the present invention is described herein by example, using various embodiments and illustrative drawings, those skilled in the art will recognise invention is neither intended to be limited that to the embodiment of drawing or drawings described nor designed to represent the scale of the various components. Further, some features that may form a part of the invention may not be illustrated with specific figures for ease of illustration. Such omissions do not limit the embodiment outlined in any way. The drawings and detailed description are not intended to restrict the invention to the form disclosed. Still, on the contrary, the invention covers all modification / s, equivalents, and alternatives falling within the spirit and scope of the present invention as defined by the appended claims. The headings are used for organizational purposes only and are not meant to limit the description's size or the claims. As used throughout this specification, the worn "may" be used in a permissive sense (That is, meaning having the potential) rather than the mandatory sense (That is, meaning, must).

[0025] Further, the words "an" or "a" mean "at least one" and the word "plurality" means one or more unless otherwise mentioned. Furthermore, the terminology and phraseology used herein is solely used for descriptive purposes and should not be construed as limiting in scope. Language such as "including," "comprising," "having," "containing," or "involving," and variations thereof, is intended to be broad and encompass the subject matter listed thereafter, equivalents and any additional subject matter not recited, and is not supposed to exclude any other additives, components, integers or steps. Likewise, the term "comprising" is considered synonymous with the terms "including" or "containing" for applicable legal purposes. Any discussion of documents acts, materials, devices, articles and the like are included in the specification solely to provide a context for the present invention. In this disclosure, whenever an element or a group of elements is preceded with the transitional phrase "comprising", it is also understood that it contemplates the same component or group of elements with transitional phrases "consisting essentially of, "consisting", "selected from the group comprising", "including", or "is" preceding the recitation of the element or group of elements and vice versa.

[0026] Before explaining at least one embodiment of the invention in detail, it is to be understood that the present invention is not limited in its application to the details outlined in the following descriptionor exemplified by the examples. The invention is capable of other embodiments or of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for description and should not be regarded as limiting. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs. Besides, the descriptions, materials, methods, and examples are illustrative only and not intended to be limiting. Methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention.

[0027] The present invention is a high-efficiency biomass stove specifically designed to address the longstanding issues of indoor air pollution, inefficient fuel utilization, and limited energy access in rural and underserved communities. This invention seeks to revolutionize traditional biomass cooking methods by integrating advanced technologies that optimize performance, enhance safety, and provide multifunctional utility. The stove’s primary purpose is to offer an environmentally sustainable, cost-effective, and user-friendly solution for households that rely on biomass fuels, thereby significantly improving their quality of life while reducing environmental impact.

[0028] At the core of the invention lies its ability to enhance combustion efficiency through precise, automated control mechanisms. The stove is engineered to minimize harmful emissions by ensuring optimal combustion conditions tailored to various biomass fuels such as wood, agricultural residues, and dung. By dynamically regulating airflow and combustion parameters, the system achieves superior fuel efficiency and substantially reduces the release of particulate matter and toxic gases, addressing critical health and environmental concerns associated with traditional cooking methods.

[0029] The stove’s energy efficiency is further enhanced through the integration of a thermoelectric power generation module, which converts waste heat into usable electricity. This feature enables households to meet basic energy needs, such as charging mobile devices or powering LED lights, without the need for additional energy sources. To ensure continuous energy availability, the system also incorporates a waste heat recovery mechanism that captures excess heat during operation and repurposes it for secondary applications, such as water heating or crop drying. These functionalities not only improve the stove’s utility but also contribute to reducing overall energy wastage.

[0030] The modular design of the stove introduces unprecedented flexibility and adaptability. Users can customize the stove with various attachments to suit specific household or agricultural needs, including interchangeable cooking surfaces and additional modules for crop drying or water heating. This design ensures that the stove remains relevant and functional across diverse use cases, making it a versatile tool for rural and agricultural settings. The modularity also simplifies maintenance and repair, enabling users to replace individual components without requiring specialized expertise, thereby extending the stove’s operational lifespan.

[0031] User interaction and convenience are central to the stove’s design. A real-time monitoring system provides users with valuable feedback on fuel consumption, emissions, and energy generation,empowering them to make informed decisions about stove usage. The user interface, which may include mechanical displays or smartphone connectivity, ensures that even technologically inexperienced users can operate the system efficiently. Visual guides and intuitive controls further enhance user accessibility, making the stove an inclusive solution for all demographics.

[0032] Safety features are a cornerstone of the invention, addressing the inherent risks associated with biomass cooking. The stove is equipped with advanced mechanisms to prevent accidents, including automatic shut-off systems to counter overheating or tipping, insulated surfaces to protect against burns, and child -proof locks for enhanced household safety. These measures ensure that the stove operates reliably and securely in diverse household environments, minimizing the likelihood of user injuries or property damage.

[0033] The invention is designed with sustainability in mind, utilizing locally available materials and durable construction techniques to minimize costs and support regional manufacturing. Its longterm usability is further supported by the inclusion of self -maintenance features, such as a selfcleaning ash removal system, and a design philosophy that prioritizes repairability over replacement. These attributes contribute to the stove’s environmental and economic viability, making it an ideal solution for large-scale adoption in resource-constrained settings.

[0034] This high-efficiency biomass stove represents a comprehensive response to the challenges posed by traditional biomass cooking. By integrating advanced combustion technologies, energy generation capabilities, and user-centric safety features, the invention addresses critical health, environmental, and energy access concerns while empowering users with a versatile and sustainable cooking solution. Its innovative design and multifaceted functionality position it as a transformative tool for improving living standards in rural and underserved communities.

[0035] Here the structure is primarily composed of heat-resistant and corrosion-proof materials, providing a durable and long-lasting outer shell capable of withstanding extended exposure to high temperatures and environmental elements. The primary body of the stove is cylindrical or rectangular with smooth, rounded edges to eliminate sharp comers, enhancing safety and user comfort during handling. The exterior surface is finished with an insulated coating, both to prevent heat transfer and to provide a tactile surface that remains cool to the touch during operation. This insulation ensures that users can safely handle the stove without risk of burns, even when it is in active use. The coating is designed to resist soot accumulation and is easy to clean, maintaining the stove's visual and functional integrity over prolonged use.

[0036] The top of the stove is dominated by a flat or slightly contoured cooking surface, accommodating a variety of pots, pans, or interchangeable cooking attachments. The cooking surface is modular, allowing users to switch between flat griddles, wok rings, or other specialized attachments with ease. The perimeter of the top surface is lined with raised edges or retaining clips to secure cookware in place, minimizing the risk of accidental spills or displacement during operation. A discreet exhaust vent is integrated into the upper section, directing emissions away from the user while blending seamlessly with the overall design.

[0037] The stove's control interface is positioned ergonomically on the front panel for easy access. It includes a combination of mechanical knobs and digital displays, designed to provide real-timefeedback on combustion efficiency, fuel consumption, and electricity generation. The digital display is clear and intuitive, with icons and indicators that communicate operational status and safety alerts effectively. For regions with limited literacy, the stove features pictorial instructions embossed directly onto the surface, guiding users through basic operations and maintenance tasks in a universally understandable manner.

[0038] The base of the stove incorporates a sturdy, non-slip foundation that anchors the unit securely to the ground, even on uneven surfaces. The foundation is equipped with vibration -dampening features to prevent movement during use, ensuring stability and safety in dynamic cooking environments. Ventilation grilles or slots are strategically placed around the lower section of the stove, allowing for optimal airflow while maintaining a sleek and unobtrusive appearance.

[0039] On one side of the stove, an integrated charging port and utility panel provide access to USB and DC outlets for powering household devices. The utility panel is protected by a hinged cover to prevent dust and debris from entering the ports when not in use. Adjacent to the panel, a small compartment houses the waste heat recovery outlet, designed for optional attachments such as water heating modules or crop drying extensions. These features are seamlessly integrated into the overall design, maintaining a cohesive and streamlined aesthetic. The stove's ash collection system is concealed within a lower compartment, accessible through a secure, latch-operated door. This compartment is designed to allow for effortless removal and disposal of ash without disrupting the stove's operation. The self-cleaning mechanism operates internally, ensuring that the external appearance remains clean and unobstructed at all times.

[0040] The high-efficiency biomass stove integrates a sophisticated array of components, each meticulously engineered to perform a specific function while contributing synergistically to the overall operation of the system. The seamless interaction among these components ensures optimal performance, safety, and user convenience, making the stove an innovative solution for addressing the challenges associated with traditional biomass cooking.

[0041] At the heart of the system is the combustion chamber, designed with advanced thermal insulation and airflow optimization to facilitate efficient burning of various biomass fuels. The chamber is constructed from heat-resistant alloys and refractory materials capable of withstanding prolonged high temperatures without deformation or degradation. The combustion chamber is configured to ensure complete combustion, significantly reducing emissions of particulate matter and carbon monoxide. Integrated airflow pathways allow for precise regulation of oxygen supply, controlled by the mechanical air-fuel ratio control system. This system employs temperature-responsive bimetallic strips or shape memory alloys to dynamically adjust airflow based on the type of biomass being burned, ensuring fuel efficiency and minimizing waste.

[0042] The design of the combustion chamber incorporates advanced thermal insulation to retain heat effectively, promoting high combustion temperatures that are essential for the complete oxidation of biomass fuels. This process substantially reduces the emissions of particulate matter and carbon monoxide, thereby mitigating indoor air pollution and ensuring compliance with environmental safety standards. The chamber geometry is optimized to create a uniform heat distribution, preventing localized hotspots and ensuring consistent combustion across the fuel bed.

[0043] Integrated airflow pathways are a critical feature of the combustion chamber, allowing for precise regulation of oxygen supply, which is fundamental to achieving complete combustion. These pathways are controlled by a sophisticated mechanical air-fuel ratio control system that dynamically adjusts the flow of air based on real-time combustion conditions. This system employs temperature-responsive bimetallic strips or shape memory alloys to detect and respond to variations in fuel type, moisture content, and combustion temperature. By modulating the oxygen levels with precision, the system enhances fuel efficiency and minimizes wastage, ensuring that the stove operates optimally under diverse conditions. The air- fuel ratio control system operates through a seamless interaction between the thermal feedback mechanism and the airflow pathways. As the temperature within the combustion chamber fluctuates, the temperature- responsive elements adjust their configuration to regulate the volume and velocity of incoming air. For example, in scenarios where the biomass fuel has a high moisture content, the system compensates by increasing airflow to sustain efficient combustion. This dynamic adjustment minimizes the need for manual intervention and ensures that the stove can adapt autonomously to varying fuel characteristics.

[0044] The interaction between the combustion chamber and the integrated airflow pathways is further enhanced by the incorporation of a smart fuel sensing system. This subsystem utilizes advanced sensors to analyze the properties of the biomass fuel, such as density and moisture content, and communicates these parameters to the air-fuel ratio control system. The resulting closed-loop feedback mechanism ensures that the combustion process remains consistent, efficient, and environmentally sound, irrespective of external conditions or user practices. In addition to its core functionalities, the combustion chamber features a modular design that facilitates maintenance and repair. Components such as the air-fuel ratio control mechanism and thermal insulation layers are designed to be easily replaceable, allowing users to address wear and tear without requiring specialized expertise. This modularity not only extends the operational lifespan of the stove but also reduces long-term maintenance costs, making it a sustainable and economically viable solution for underserved communities.

[0045] The combustion chamber's integration with other systems within the stove, including the thermoelectric power generation module and the waste heat recovery system, exemplifies a holistic approach to energy utilization. By channeling heat generated during combustion to auxiliary applications, the stove maximizes its energy efficiency while providing additional functionalities such as electricity generation and water heating. These synergies underscore the stove’s multifunctional design, which is tailored to enhance the quality of life for users while promoting environmental sustainability.

[0046] The smart fuel sensing system plays a critical role in optimizing the stove’s performance. This system uses advanced sensors to detect the type and condition of the biomass fuel, such as its moisture content and density. The data collected by these sensors is relayed to the air control mechanism, which adjusts the airflow and combustion parameters accordingly. This real-time feedback loop reduces user intervention and ensures consistent performance across a wide range of fuel types, enhancing both convenience and efficiency.

[0047] At the core of this system are moisture sensors, which utilize capacitive or resistive sensing technologies to measure the water content within the biomass fuel. These sensors are calibrated to detect even minimal variations in moisture levels, providing precise data that influences the airfuel ratio. When the sensors identify a high moisture content, the system dynamically increases airflow to sustain efficient combustion. Conversely, lower moisture levels prompt adjustments to reduce excess oxygen, optimizing the combustion process and conserving energy. Density sensors constitute another critical component of the smart fuel sensing system. These sensors, often employing piezoelectric or ultrasonic technologies, evaluate the compactness and mass distribution of the fuel. By analyzing the density, the system determines the fuel's energy potential and adjusts combustion parameters accordingly. This ensures that the stove achieves uniform energy output, irrespective of fuel variability, while minimizing incomplete combustion and emissions.

[0048] The integration of these sensors is governed by a centralized microcontroller, which serves as the processing hub for the smart fuel sensing system. The microcontroller continuously aggregates data from the sensors, applies pre-configured algorithms, and communicates the required adjustments to the air control mechanism. This closed-loop system ensures seamless coordination between fuel sensing and airflow regulation, creating a self -optimizing environment that adapts autonomously to changing fuel characteristics. The interaction between the smart fuel sensing system and the air control mechanism is facilitated by advanced signal processing technologies. Real-time data is transmitted via high-speed communication channels, ensuring minimal latency in system response. For instance, when the sensors detect a high-density fuel with low moisture content, the microcontroller directs the air control mechanism to moderate airflow, optimizing combustion efficiency. This interplay not only reduces the user's operational burden but also enhances the stove’s energy efficiency and environmental performance.

[0049] The smart fuel sensing system is further augmented by its integration with auxiliary components, such as the combustion chamber and thermoelectric power generation module. By ensuring precise fuel combustion, the system supports the consistent generation of waste heat, which is subsequently harnessed for auxiliary applications. This synergy underscores the stove’s multifunctional capabilities and its ability to maximize energy utilization. From a design perspective, the smart fuel sensing system is engineered for durability and ease of maintenance. Each sensor is encased in heat-resistant and corrosion-proof materials to withstand the harsh operating conditions of biomass combustion. Modular construction allows for the replacement of individual sensors without disrupting the stove's functionality, ensuring long-term reliability and cost-effective maintenance.# Constants for threshold values MOISTURE_HIGH_THRESHOLD = 30 # Percentage of water content considered high MOISTURE_LOW_THRESHOLD = 10 # Percentage of water content considered low DENSITY_HIGH_THRESHOLD = 800 # High density in kg / m3DENSITY_LOW_THRESHOLD = 400 # Low density in kg / m3# Variables to store sensor readings moisture_level = 0 # Moisture content in percentagedensity Jevel = 0 # Density of biomass fuel in kg / m3# PID controller parameters for airflow adjustmentKp = 1.0 # Proportional gainKi = 0.1 # Integral gainKd = 0.01 # Derivative gain# Initial airflow value airflow = 50 # Default airflow percentage# Function to read sensors def read_sensors(): global moisture_level, density_level# Simulate sensor readings moisture_level = read_moisture_sensor() # Function to read moisture sensor density_level = read_density_sensor() # Function to read density sensor# Function to adjust airflow def adjust_airflow(target_airflow): global airflow# Simulate sending the airflow adjustment command to the actuator set_airflow(target_airflow) airflow = target_airflow# Function to compute airflow based on sensor readings def compute_airflow(): global moisture_level, density_level target_airflow = 50 # Default value# Adjust for high moisture content if moisturejevel > MOISTURE_HIGH_THRESHOLD: target_airflow += (moisturejevel - MOISTURE_HIGH_THRESHOLD) * Kp# Adjust for low moisture content elif moisturejevel < MOISTURE J.OWJTHRESHOLD: target_airflow -= (MOISTURE_LOW_THRESHOLD - moisturejevel) * Kp# Adjust for high density if density Jevel > DENSITY JUGHJTHRESHOLD: target_airflow -= (density Jevel - DENS IT Y_HIGH_THRES HOLD) * Kp# Adjust for low density elif density Jevel < DENSITY JDWJTHRESHOLD: target_airflow += (DENSITY_LOW_THRESHOLD - density Jevel) * Kp# Limit airflow to the range [0, 100] target_airflow = max(0, min(100, target_airflow)) return target_airflow# Main control loop def mainjoop(): while True:read_sensors() # Gather data from sensors target_airflow = compute_airflow() # Compute optimal airflow adjust_airflow(target_airflow) # Send adjustment to airflow actuator log_status() # Log system status (for debugging and monitoring) delay) 1000) # Wait 1 second before the next loop iteration# Helper functions def read_moisture_sensor():# Replace with actual code to read moisture sensor return simulated_sensor_data("moisture") def read_density_sensor():# Replace with actual code to read density sensor return simulated_sensor_data("density") def set_airflow( value):# Replace with actual code to adjust the airflow actuator print(f'Setting airflow to: {value}%") def log_status(): global moisture_level, density_level, airflow print(f'Moisture Level: {moisture_level}%, Density Level: {density_level}kg / m3, Airflow: { airflow }%") def simulated_sensor_data(sensor_type):# Simulate sensor data for testing purposes if sensor_type == "moisture": return 25 # Example value elif sensor_type == "density": return 600 # Example value

[0050] The above process optimizes the performance of the smart fuel sensing system in the high- efficiency biomass stove by dynamically adjusting airflow based on the moisture and density characteristics of the fuel. At its core, the algorithm employs threshold values for moisture content and density as reference points to identify variations in fuel conditions and adapt the combustion process accordingly. These thresholds are derived from empirical studies and testing that correlate specific moisture and density levels with combustion efficiency, emission control, and energy output. The chosen moisture content thresholds, with high moisture defined at 30% and low moisture at 10%, are critical for maintaining effective combustion. Biomass fuels with excessive moisture content (above 30%) require additional oxygen to sustain combustion because the water in the fuel absorbs heat energy, slowing the combustion process. The algorithm compensates for this by increasing airflow to introduce more oxygen, thereby sustaining the flame and promoting efficient burning. Conversely, when moisture content falls below 10%, excessive airflow can lead to heat loss and inefficient energy use. In this scenario, the algorithm reduces airflow to retain heat within the combustion chamber, optimizing energy efficiency and minimizing waste.

[0051] For density, thresholds are set at 800 kg / m3for high density and 400 kg / m3for low density, reflecting typical ranges for common biomass fuels like wood and agricultural residues. Higher- density fuels tend to burn more slowly but release greater energy over time, requiring preciseoxygen control to avoid incomplete combustion and excessive emissions. The algorithm moderates airflow for such fuels to ensure they burn steadily, extracting maximum energy while reducing pollutants. In contrast, lower-density fuels ignite and burn quickly, potentially leading to energy wastage if not regulated. By increasing airflow for these fuels, the algorithm prevents overheating and ensures a uniform combustion process.

[0052] The integration of these threshold values into the algorithm allows the system to dynamically adapt to real-time sensor data from the moisture and density sensors. The sensors relay their readings to the microcontroller, which evaluates them against the predefined thresholds. Depending on the readings, the algorithm computes the appropriate adjustments to the airflow, ensuring that the combustion chamber operates under optimal conditions. This closed-loop feedback system reduces the need for manual intervention, enabling the stove to autonomously respond to changing fuel characteristics. The use of these thresholds is instrumental in achieving consistent performance across a wide range of biomass fuels. By tailoring airflow to the specific needs of the fuel in use, the algorithm enhances combustion efficiency, reduces harmful emissions, and conserves energy.

[0053] A pivotal feature of the stove is the thermoelectric power generation module, which converts waste heat from the combustion process into electrical energy. This module comprises thermoelectric materials with high conversion efficiency, arranged in a compact, heat-exchanging assembly. The thermoelectric generator is positioned strategically to capture maximum waste heat without interfering with the primary cooking function. The electricity generated is stored in a small battery bank, which is integrated within the stove's housing. This bank provides a stable power supply to USB and DC outlets, enabling the operation of household devices such as LED lights and mobile chargers. The energy management system ensures efficient distribution of the generated power, preventing overloading and optimizing storage. At the heart of the thermoelectric module is the thermoelectric generator, which operates based on the Seebeck effect. This phenomenon involves the direct conversion of temperature differences between the hot surface exposed to the combustion heat and a cooler surface maintained by an integrated heat sink into electrical energy. The thermoelectric materials used in the generator are carefully selected for their high thermal conductivity and electrical efficiency, ensuring that even marginal amounts of waste heat are effectively utilized. These materials are arranged in a series of p-n junctions, where the temperature gradient drives charge carriers, generating direct current electricity.

[0054] The integration of heat exchangers within the thermoelectric module enhances its ability to capture waste heat. These exchangers are constructed from heat-resistant and corrosion-proof alloys, designed to withstand the harsh thermal conditions of biomass combustion. The exchangers ensure consistent heat transfer to the thermoelectric materials while simultaneously dissipating excess heat to prevent thermal overload. This configuration guarantees that the generator operates within its optimal temperature range, safeguarding its efficiency and longevity. The electricity generated by the thermoelectric module is stored in a battery bank integrated within the stove’s housing. This battery bank is designed with high-capacity lithium-ion or advanced lead-acid batteries to provide reliable energy storage. The energy management system, a critical component of themodule, monitors and regulates the flow of electricity between the thermoelectric generator and the battery bank. It ensures that the storage capacity is utilized efficiently while preventing overcharging or deep discharge, which could compromise the battery's performance or lifespan.

[0055] The stored electricity is distributed to USB and DC outlets embedded in the stove’s utility panel. These outlets enable users to charge essential household devices such as LED lights, mobile phones, and small appliances, thereby extending the stove’s utility beyond its primary cooking function. The energy management system also incorporates protective mechanisms, such as circuit breakers and overload sensors, to ensure safe operation during energy distribution. The system’s design prioritizes user convenience and safety, integrating seamlessly into the stove’s overall structure.

[0056] To enhance the module’s performance, temperature and voltage sensors are integrated into the thermoelectric generator and the energy management system. These sensors continuously monitor the operational parameters of the module, including the temperature differential across the thermoelectric materials and the voltage output. The data collected is processed by the stove’s microcontroller, which adjusts the module’s operating conditions to maintain optimal energy generation and storage. This closed-loop feedback mechanism ensures that the thermoelectric module adapts dynamically to variations in combustion heat and user energy demands.

[0057] Complementing the thermoelectric module is the waste heat recovery system, which captures residual heat and channels it to auxiliary applications. This system includes a heat exchanger embedded in the stove ’ s structure, designed to transfer thermal energy to an external medium such as water or air. The heat exchanger is connected to modular attachments, including a water heating unit and a crop drying system. By utilizing waste heat for secondary purposes, the stove significantly enhances overall energy efficiency and utility. It has a heat exchanger embedded strategically within the stove's structure. This heat exchanger is constructed from high- conductivity, heat-resistant alloys engineered to withstand prolonged exposure to elevated temperatures and harsh environmental conditions associated with biomass combustion. Its primary function is to transfer residual heat from the combustion chamber to an external medium, such as air or water, for secondary use. The design of the heat exchanger prioritizes thermal efficiency, employing finned surfaces or tubular geometries to maximize the surface area for heat transfer while maintaining a compact form factor.

[0058] The heat exchanger is coupled with modular attachments designed for specific auxiliary applications, including water heating units and crop drying systems. For water heating, the exchanger is connected to a closed-loop circulation system that channels heated water to an external storage tank or directly to an outlet for immediate use. This system incorporates thermally insulated pipelines to minimize heat loss during transfer and temperature sensors to monitor and regulate the water temperature. Similarly, for crop drying, the heat exchanger supplies warm air to a drying chamber equipped with controlled ventilation and humidity sensors. These modular attachments enhance the stove’s versatility, enabling users to leverage waste heat for domestic and agricultural purposes.

[0059] The integration of sensors within the waste heat recovery system is instrumental in ensuring its optimal performance and safety. Temperature sensors placed at critical points within the heat exchanger and modular attachments continuously monitor the thermal output and identify any deviations from predefined operating ranges. These sensors relay data to the stove’s central microcontroller, which adjusts the flow rates of air or water through the system to maintain efficient heat transfer. Additionally, humidity sensors embedded within the crop drying module provide real-time feedback on drying conditions, allowing users to customize the process according to specific requirements. The interaction between the waste heat recovery system and other components of the stove, such as the thermoelectric power generation module and the combustion chamber, is designed to maximize energy utilization. Residual heat not captured by the thermoelectric module is directed to the heat exchanger, ensuring that no thermal energy is wasted. This synergy between the systems underscores the stove's holistic approach to energy efficiency, where each subsystem complements the others to achieve optimal performance.

[0060] From a design perspective, the waste heat recovery system incorporates several features to ensure durability, ease of maintenance, and adaptability. The modular construction allows individual components, such as the heat exchanger and sensor assemblies, to be easily replaced or upgraded without compromising the stove’s functionality. The use of corrosion-resistant materials in all exposed parts further enhances the system's longevity, making it suitable for prolonged use in challenging environments. The modular attachments are designed with standardized interfaces, ensuring compatibility and ease of integration with the main stove body. The waste heat recovery system also includes robust safety mechanisms to prevent overheating and ensure user protection. Thermal cut-off sensors and pressure relief valves are integrated into the system to mitigate risks associated with excessive heat buildup or blocked circulation pathways. These features are complemented by intuitive user interfaces, which provide visual or auditory alerts in case of anomalies, enabling timely intervention.

[0061] The modular design of the stove is another critical component, allowing for customization and adaptability to diverse user needs. The modular framework includes interchangeable cooking surfaces, such as flat griddles and wok rings, which can be easily installed or removed. Additionally, optional attachments for crop drying and water heating can be connected via standardized interfaces, ensuring compatibility and ease of use. The modularity extends to the internal components as well, with replaceable parts such as the thermoelectric module and heat exchanger, facilitating maintenance and reducing downtime.

[0062] The crop drying and water heating modules integrated into the Multifunctional High -Efficiency Biomass Stove exemplify a versatile approach to utilizing waste heat from the stove’s operation. These modules are designed to connect seamlessly via standardized interfaces, ensuring compatibility with the stove’s main body while providing auxiliary functions that enhance its overall utility. The modularity and adaptability of these components make them a pivotal addition to the stove’s multifunctional design, enabling users to efficiently harness residual thermal energy for diverse domestic and agricultural applications.

[0063] The water heating module operates through a closed-loop heat transfer system that channels waste heat from the stove’s combustion process to heat water stored in an insulated reservoir or delivered directly to an outlet for immediate use. This module includes a heat exchanger constructed from high-efficiency thermal materials capable of withstanding extreme temperatures and facilitating rapid heat transfer. To minimize thermal losses during the process, the system utilizes insulated pipelines and storage tanks made from corrosion-resistant materials. The incorporation of temperature sensors within the water heating module ensures precise monitoring and regulation of water temperature, preventing overheating and optimizing energy utilization. The crop drying module leverages warm air generated by the stove’s waste heat recovery system to create an environment conducive to moisture removal from agricultural produce. This module comprises a heat exchanger connected to a drying chamber equipped with controlled ventilation. The drying chamber includes humidity and temperature sensors that continuously monitor the internal conditions, allowing users to maintain optimal drying parameters. The ventilation system is powered by an adjustable fan, which regulates airflow to ensure uniform drying and prevent localized overheating or uneven moisture reduction. These features enhance the module’s efficiency, enabling it to process various types of crops effectively while maintaining their quality.

[0064] The integration of advanced sensors in both the water heating and crop drying modules underscores their sophisticated design. Temperature sensors in the water heating module provide real-time feedback on the heat exchanger’s performance and water temperature levels. Similarly, the crop drying module incorporates humidity sensors to assess the moisture content of the chamber’s air, ensuring precise control over drying conditions. These sensors relay data to the stove’s central microcontroller, which dynamically adjusts the heat transfer and airflow rates to optimize the modules’ performance. This closed-loop feedback mechanism ensures consistent operation and reduces the need for user intervention. The interaction between the crop drying and water heating modules and the stove’s waste heat recovery system exemplifies an integrated design philosophy. The waste heat recovered from the combustion chamber is distributed to these modules through dedicated channels, ensuring efficient thermal energy allocation without compromising the stove’s primary cooking functions. This seamless integration not only maximizes the utilization of residual heat but also enhances the stove’s versatility, making it suitable for diverse use cases in domestic and agricultural settings.

[0065] The modular construction of these components further enhances their practicality and user- friendliness. Both the crop drying and water heating modules are designed with replaceable parts, such as heat exchangers and sensor assemblies, to facilitate maintenance and reduce downtime. The standardized interfaces connecting these modules to the stove allow for effortless installation and removal, enabling users to switch between or use both modules simultaneously as needed. This adaptability ensures that the stove remains functional and relevant across varying user requirements and environmental conditions. The safety features incorporated into these modules reinforce their reliability and usability. The water heating module is equipped with pressure relief valves and thermal cut-off sensors to prevent excessive pressure buildup or overheating. In the crop drying module, over-temperature sensors and automatic airflow adjustments mitigate therisks of fire hazards or produce damage. These measures, combined with intuitive user interfaces, provide users with a secure and hassle-free experience.

[0066] The real-time monitoring system integrates seamlessly with the stove’s operational components to provide users with actionable feedback. Sensors embedded throughout the stove monitor parameters such as fuel consumption, emission levels, and electricity generation. The data is processed by an onboard microcontroller, which drives a user interface comprising a digital display or smartphone connectivity. This system empowers users to optimize stove usage and maintain safe operating conditions, enhancing both performance and safety.# Constants for threshold valuesFUEL_CONSUMPTION_THRESHOLD = 5.0 # kg / hour, example threshold EMISSION_LEVEL_THRESHOLD = 50.0 # ppm (parts per million) for CO2 or other gases ELECTRICITY_GENERATION_THRESHOLD = 20.0 # Watts minimum acceptable output# Variables for sensor readings fuel_consumption_rate = 0.0 # Measured in kg / hour emission_level = 0.0 # Measured in ppm electricity_generation = 0.0 # Measured in Watts# Function to read sensor data def read_sensors(): global fuel_consumption_rate, emission_level, electricity_generation# Simulated sensor reading functions fuel_consumption_rate = read_fuel_sensor() emission_level = read_emission_sensor() electricity_generation = read_electricity_sensor()# Function to update user interface def update_ui():# Example digital display or smartphone interface update print(f 'Fuel Consumption: {fuel_consumption_rate:.2f} kg / hour") print(f 'Emission Level: {emission_level:.2f} ppm") print(f 'Electricity Generation: {electricity -generation:.2f} W")# Function to check and notify for threshold breaches def check_thresholds(): if fuel_consumption_rate > FUEL_CONSUMPTION_THRESHOLD: alert_user("High fuel consumption detected. Check fuel type or airflow.") if emissionjevel > EMISSION_LEVEL_THRESHOLD: alert_user("Excessive emissions detected. Ensure proper combustion.") if electricity_generation < ELECTRICITY_GENERATION_THRESHOLD: alert_user("Low electricity generation. Check thermoelectric system.")# Main loop to continuously monitor and update def main_loop(): while True: read_sensors() # Gather data from sensors update_ui() # Update user interface with readings check_thresholds() # Alert if thresholds are breached delay(lOOO) # Wait 1 second before the next iteration# Simulated sensor functions def read_fuel_sensor(): return 4.5 # Example reading for testing def read_emission_sensor(): return 45.0 # Example reading for testing def read_electricity_sensor(): return 25.0 # Example reading for testing def alert_user(message):# Example notification mechanism print(f" ALERT: {message}") def delay (ms): import time time.sleep(ms / 1000)# Start the monitoring process

[0067] The above process is designed to monitor critical parameters such as fuel consumption, emission levels, and electricity generation, which are essential for ensuring the stove operates efficiently and safely. Each parameter is assessed against predefined threshold values to identify potential issues and alert the user through the user interface. The fuel consumption threshold of 5.0 kg / hour ensures that excessive fuel usage is flagged. High consumption rates can indicate inefficient combustion, poor fuel quality, or improper airflow, all of which reduce the stove’s performance and increase operating costs. Monitoring fuel consumption enables the user to make necessary adjustments, such as changing the fuel type or optimizing the air-fuel ratio.

[0068] The emission level threshold of 50.0 ppm is set to detect elevated levels of harmful gases, such as carbon monoxide or unburned hydrocarbons. These emissions can result from incomplete combustion due to insufficient oxygen or low-quality fuel. Alerting users about excessive emissions promotes safer operation by encouraging timely maintenance or modifications to thecombustion settings, reducing health risks and environmental impact. The electricity generation threshold of 20.0 Watts ensures that the thermoelectric power generation module is operating effectively. If the output falls below this value, it could indicate issues such as insufficient waste heat capture, degraded thermoelectric materials, or obstructions in the heat transfer pathways. By notifying users of low power output, the system helps maintain auxiliary functionalities like device charging and lighting. This processes real-time sensor data to provide actionable insights, enhancing the stove’s performance and safety. By continuously monitoring these parameters, users are empowered to make informed decisions about stove usage, optimize combustion conditions, and address anomalies promptly. This dynamic feedback loop ensures the stove operates efficiently under diverse conditions while safeguarding user health and environmental integrity.

[0069] Safety is addressed through a combination of insulated surfaces, automatic shut-off mechanisms, and child-proof locks. The insulated surfaces are made from advanced materials that remain cool to the touch, protecting users from accidental burns. The automatic shut-off system is triggered by sensors detecting overheating, tipping, or other unsafe conditions, immediately halting operation to prevent accidents. These features are complemented by a self-cleaning ash removal mechanism, which uses a heat-driven mechanical grate to collect and expel ash automatically, reducing manual intervention and ensuring safe disposal. Each component of the stove has been designed to integrate harmoniously with the others, creating a cohesive and highly efficient system. The smart fuel sensing system ensures that the combustion chamber operates at peak efficiency, while the thermoelectric generator and waste heat recovery system maximize energy utilization. The modular design enhances user adaptability, and the safety features provide robust protection. Together, these components form a highly advanced biomass stove that delivers unparalleled performance, addressing the multifaceted needs of users in rural and underserved communities while promoting environmental sustainability.

[0070] The operation of the high-efficiency biomass stove embodies a meticulously engineered sequence of interactions among its integrated systems, ensuring optimal performance, safety, and multifunctionality. The working process begins with the ignition of biomass fuel in the combustion chamber, designed to handle various fuel types such as wood, agricultural residues, and dung. The chamber’s thermal insulation and optimized geometry ensure the rapid attainment of high temperatures, facilitating complete combustion. The system dynamically regulates airflow through the mechanical air-fuel ratio control mechanism, which employs temperature-responsive elements such as bimetallic strips or shape memory alloys to adjust oxygen supply based on realtime combustion conditions. This precision ensures maximum energy extraction and minimal pollutant emissions.

[0071] The smart fuel sensing system actively monitors the type and characteristics of the fuel, including moisture content and density, through embedded sensors. These sensors relay data to the airflow regulation subsystem, which adapts combustion parameters to optimize fuel efficiency. For instance, higher moisture content may trigger an increase in airflow to sustain efficient burning. This closed-loop system minimizes user intervention, allowing the stove to autonomously adjustto diverse operating conditions. As combustion progresses, waste heat is harnessed by the thermoelectric generator integrated into the stove. The generator utilizes the temperature gradient between the combustion chamber and the external environment to produce electricity, which is stored in an internal battery bank. This stored energy powers auxiliary functions such as USB ports and DC outlets, enabling users to charge electronic devices or operate low -power appliances. The energy management system ensures consistent power supply while preventing overcharging or depletion of the battery bank.

[0072] Simultaneously, the waste heat recovery system captures residual thermal energy through a heat exchanger positioned strategically around the combustion chamber. This recovered heat is redirected for secondary applications, such as water heating or crop drying, via modular attachments. For instance, heated water can be delivered through an integrated heat exchanger for domestic use, while a crop drying attachment utilizes warm air for agricultural purposes. This dual utilization of waste heat significantly enhances the stove’s overall energy efficiency and functionality.

[0073] The modular design of the stove facilitates seamless customization to suit varying user needs. Interchangeable cooking surfaces allow for diverse culinary methods, while optional attachments such as a crop dryer or water heating unit can be easily integrated. These modules connect via standardized interfaces, ensuring compatibility and ease of installation. The modularity also extends to internal components, allowing for efficient maintenance and replacement of parts such as the thermoelectric generator or fuel sensing system. Throughout its operation, the stove’s realtime monitoring system continuously assesses key parameters, including fuel consumption, emissions, and power generation. This data is processed by an onboard microcontroller, which drives a user interface that provides actionable feedback. Users can view this information on a digital display or access it via smartphone connectivity, empowering them to make informed decisions about stove usage. Visual alerts and safety notifications ensure that users are promptly informed of any deviations from optimal operating conditions.

[0074] Safety mechanisms are integral to the system’s functionality. Insulated surfaces prevent accidental burns, while an automatic shut-off system halts operation in response to overheating, tipping, or other hazardous conditions. The self-cleaning ash removal mechanism, driven by heat-responsive mechanical components, automatically collects and expels ash, maintaining cleanliness and reducing manual intervention. So, the working of the high-efficiency biomass stove exemplifies a harmonious integration of advanced combustion technology, energy recovery, user-friendly interfaces, and safety measures. Each component interacts seamlessly to deliver a cooking solution that is not only efficient and versatile but also environmentally sustainable and inherently safe for household use. This comprehensive system redefines traditional biomass cooking by addressing critical issues such as indoor air pollution, energy inefficiency, and safety concerns, making it an indispensable tool for improving the quality of life in resource-constrained settings.

[0075] Case Study Example: Suppose in a rural village characterized by limited access to modern energy resources, the Multifunctional High-Efficiency Biomass Stove was deployed to address the dualrequirements of efficient cooking and agricultural productivity enhancement. The stove was set up in a household that engaged in subsistence farming, where crop drying was a critical process for preserving post-harvest produce. This deployment exemplifies the stove’s multifunctionality, demonstrating its ability to support crop drying operations while simultaneously fulfilling household energy and cooking needs. The system was configured to optimize its waste heat recovery capabilities for dual purposes: cooking and crop drying. The primary cooking function was maintained at the stove’s top surface, where the family used it to prepare daily meals. Simultaneously, the waste heat generated during combustion was diverted to the crop drying module through a standardized interface, ensuring compatibility and efficient heat transfer. The crop drying module, equipped with a heat exchanger and a ventilated drying chamber, was positioned adjacent to the stove. This modular design allowed for seamless integration, enabling the family to utilize waste heat without interfering with their cooking activities.During operation, the heat exchanger within the crop drying module captured residual heat from the stove’s combustion chamber and directed it into the drying chamber. Sensors embedded in the system continuously monitored key parameters, including the temperature of the drying air and the moisture levels of the crops. These sensors relayed real-time data to the stove’s central microcontroller, which dynamically adjusted airflow and heat distribution to maintain optimal drying conditions. The system’s closed-loop feedback mechanism ensured that the drying process was both efficient and consistent, preserving the quality of the crops while minimizing energy wastage. The household reported significant improvements in crop drying efficiency. Traditional drying methods, which relied on open sun drying, were often subject to delays and contamination due to weather conditions and pests. By contrast, the biomass stove’s crop drying module provided a controlled environment with regulated temperature and airflow, enabling faster drying times and better preservation of the crops’ nutritional and economic value. The integration of this module allowed the family to process larger quantities of produce in a shorter time frame, contributing to improved food security and increased marketability of their agricultural products.While the crop drying module was in operation, the stove’s thermoelectric power generation capabilities provided additional utility. The electricity generated from waste heat was stored in the integrated battery bank and used to power small household devices such as LED lights and a mobile phone charger. This ensured that the family could benefit from clean energy access even as the stove performed its dual functions. The simultaneous use of the stove for cooking, crop drying, and electricity generation highlighted its ability to address multiple needs in a resource- constrained setting, demonstrating its value as a sustainable and versatile energy solution. The setup also emphasized safety and ease of use, which were critical for adoption in the village context. Insulated surfaces and automatic safety shut-offs mitigated the risks of burns and overheating during operation, ensuring that the stove could be operated safely by any family member. The modular design facilitated easy installation and maintenance, allowing the household to replace or upgrade components as needed without requiring specialized expertise. Additionally, the user interface provided clear feedback on system performance, empowering the family to optimize the stove’s functionality with minimal training.This case study illustrates the transformative impact of the Multifunctional High -Efficiency Biomass Stove in rural settings. By integrating advanced technologies for waste heat recovery, crop drying, and energy generation, the system not only improved the household’s cooking and agricultural practices but also enhanced their overall quality of life. Its adaptability, efficiency, and safety features positioned it as a vital tool for addressing the interconnected challenges of energy access, food security, and sustainability in underserved communities.

[0076] While there has been illustrated and described embodiments of the present invention, those of ordinary skill in the art, to be understood that various changes may be made to these embodiments without departing from the principles and spirit of the present invention, modifications, substitutions and modifications, the scope of the invention being indicated by the appended claims and their equivalents.FIGURE DESCRIPTION

[0077] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate an exemplary embodiment and explain the disclosed embodiment together with the description. The left and rightmost digit(s) of a reference number identifies the figure in which the reference number first appears in the figures. The same numbers are used throughout the figures to reference like features and components. Some embodiments of the System and methods of an embodiment of the present subject matter are now described, by way of example only, and concerning the accompanying figures, in which:

[0078] Figure - 1 illustrates the Biomass Stove, The combustion chamber is centrally located within the main body of the biomass stove. This chamber serves as the core of the system, where biomass fuel is ignited and combusted to generate heat. Its design ensures complete combustion, reducing emissions and optimizing energy extraction from the fuel. The placement at the center allows for uniform heat distribution to other functional components, enhancing the stove's overall efficiency. Adjacent to the combustion chamber is the thermoelectric generator, strategically positioned to capture waste heat from the combustion process. This component converts thermal energy into electrical energy, which is stored in an integrated battery bank. The generator’s placement maximizes exposure to consistent high temperatures, ensuring optimal power generation for household devices. The mechanical air-fuel ratio control system is located near the air inlet on the side of the stove. It dynamically regulates airflow into the combustion chamber using temperature- responsive elements such as bimetallic strips or shape memory alloys. This ensures the appropriate oxygen supply based on the fuel type, promoting efficient combustion and minimizing emissions. Its proximity to the air inlet facilitates immediate and precise adjustments. The smart fuel sensing system is embedded at the fuel intake point, where it identifies the type and condition of the biomass being used. This system automates the adjustment of combustion parameters by communicating directly with the air-fuel ratio control system, reducing user intervention while optimizing performance. On the stove’s top, the modular cooking surface provides a versatileplatform for various cooking applications. The interchangeable design allows users to swap between flat griddles, wok rings, and other attachments, adapting the stove to different cooking needs. This surface is engineered for even heat distribution, leveraging the central location of the combustion chamber for effective cooking. The waste heat recovery system is integrated along the side of the stove, with a heat exchanger that channels residual heat to secondary applications. This system supports auxiliary modules, such as water heating and crop drying, using otherwise lost thermal energy to expand the stove’s utility beyond cooking. The real-time monitoring system is situated on the front panel for easy accessibility. It features a user-friendly interface that displays critical operational data, including fuel consumption, emission levels, and power generation. The visibility and ergonomic placement of this system empower users to make informed adjustments to maximize efficiency and safety. The self-cleaning ash removal system is located below the combustion chamber, utilizing a heat-driven mechanical grate or screw conveyor to collect and expel ash automatically. Its position ensures easy access for disposal while maintaining a clean and efficient combustion process. The insulated exterior surfaces encompass the stove’s outer body, providing thermal protection to users. These surfaces remain cool to the touch, preventing accidental burns and enhancing safety during operation. The insulation also minimizes heat loss, contributing to overall energy efficiency. The battery bank and utility panel are positioned at the bottom side of the stove. This component stores electricity generated by the thermoelectric generator and provides access to USB and DC outlets for powering external devices. Its location ensures stability and protection while maintaining convenient user access. These components, thoughtfully positioned and seamlessly integrated, work in harmony to deliver an innovative, efficient, and user-friendly biomass stove designed for diverse household and small-scale applications. Each component’s location and function are optimized to enhance safety, performance, and versatility.

Claims

I / WE CLAIM1. A high-efficiency biomass stove for reducing indoor air pollution and enhancing energy efficiency, comprising: a combustion chamber configured for complete combustion of various biomass fuels; a mechanical air-fuel ratio control system utilizing temperature-responsive elements to dynamically regulate airflow during combustion; a smart fuel sensing system operatively connected to detect fuel type and adjust combustion parameters; a thermoelectric generator for converting waste heat into electrical energy; a waste heat recovery system integrated with a heat exchanger for utilizing residual heat in secondary applications; a modular design allowing interchangeable cooking surfaces and auxiliary attachments; a real-time monitoring system for providing feedback on operational parameters; and safety features including insulated surfaces, automatic shut-off mechanisms, and a selfcleaning ash removal system.

2. The high-efficiency biomass stove as claimed in Claim 1, wherein the mechanical air-fuel ratio control system comprises bimetallic strips or shape memory alloys that adjust oxygen supply based on combustion temperature and fuel properties.

3. The high-efficiency biomass stove as claimed in Claim 1, wherein the smart fuel sensing system includes sensors configured to detect moisture content, density, and other characteristics of the biomass fuel, optimizing combustion efficiency based on real-time data.

4. The high-efficiency biomass stove as claimed in Claim 1, wherein the thermoelectric generator is operatively connected to a battery bank for storing generated electricity, the battery bank being equipped with USB ports and DC outlets for powering external devices.

5. The high-efficiency biomass stove as claimed in Claim 1, wherein the waste heat recovery system comprises a heat exchanger operatively coupled to attachments for applications including water heating and crop drying, utilizing residual thermal energy.

6. The high-efficiency biomass stove as claimed in Claim 1, wherein the modular design includes interchangeable cooking surfaces such as flat griddles and wok rings, and auxiliary attachments configured for seamless integration with the stove.

7. The high-efficiency biomass stove as claimed in Claim 1, wherein the real-time monitoring system includes a microcontroller and an interface providing visual feedback on fuel consumption, emissions, and energy generation, accessible via a digital display or smartphone connectivity.

8. The high-efficiency biomass stove as claimed in Claim 1, wherein the safety features include an automatic shut-off mechanism triggered by sensors detecting overheating, tipping, or operational anomalies, ensuring user safety during operation.

9. The high-efficiency biomass stove as claimed in Claim 1 , wherein the self-cleaning ash removal system comprises a heat-driven mechanical grate or screw conveyor configured to collect and expel ash automatically, maintaining operational efficiency.

0. The high-efficiency biomass stove as claimed in Claim 1, wherein the components are constructed from locally available materials, ensuring cost-effective manufacturing and promoting sustainability while allowing for scalability and adaptability to evolving user needs.Signatory for,Dr Hemraj R Kumavat■ Dr Nilesh P SalunkeMohmmadali M SaiyyadNadeem AkhtarArshad RashidMohamed ShebuDr Amol S TDr LingarajuSamiyoddin SJayshri T Patil jyA

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