Building waste heat recycling method and system

Abstract

The invention relates to a building waste heat recycling method and system, in particular to the technical field of resource utilization, according to preset room data of a building, current heat data of all preset rooms are obtained, the size relation between all the current heat data and preset heat is sequentially judged, and for each preset room, the preset heat is obtained; when the corresponding current heat data is larger than the preset heat, waste heat recycling operation is conducted on the corresponding preset rooms, waste heat of different rooms or between different spaces can be collected and utilized in the using process, meanwhile, the current heat data of all the preset rooms are obtained according to the preset room data of the building, and the current heat data of all the preset rooms are obtained. According to the technical scheme, the size relation between the current heat data and the preset heat is sequentially judged according to the current heat data of each preset room, and for each preset room, when the corresponding current heat data is larger than the preset heat, waste heat recycling operation is carried out on the corresponding preset room, waste heat recycling can be carried out on needed waste heat, the recycling efficiency is ensured, and energy waste is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of resource utilization, and in particular to a method and system for recovering waste heat from buildings. Background Art

[0002] With the rapid development of industrialization and urbanization, energy consumption in the construction industry has become an important part of global energy consumption. Building energy consumption not only includes energy consumption in building materials production, construction, and daily operation of buildings, but also has a significant impact on the environment. The daily operation energy consumption of buildings, namely building energy consumption, covers heating, ventilation, air conditioning, hot water supply, lighting, elevators, cooking and other aspects. In my country, urban building energy consumption accounts for 22% to 24% of the national commodity energy consumption, while in developed countries, this proportion is about one-third. Energy consumption not only causes environmental pollution and affects the emission of suspended particles, SO2, NOx, CO and other pollutants in the urban atmospheric environment, but is also the main source of greenhouse gas emissions such as CO2 in global environmental issues. In addition, urban energy consumption has also triggered the "urban heat island" phenomenon, which has an adverse impact on urban climate and residents' health. Therefore, in order to achieve the sustainable development strategy, building energy conservation has become particularly important, and the development direction of the construction industry has also turned to "green buildings".

[0003] In the field of building energy conservation, waste heat recovery technology has become an effective means to reduce energy consumption and environmental pollution. As the main part of building energy consumption, one of the energy consumption characteristics of the air-conditioning system is that the system simultaneously has heat demand (cold, wet) and heat exhaust (cold, wet) processing processes. For example, in summer, low-temperature and low-humidity exhaust air can be used to cool and dry fresh air; while in winter, high-temperature and high-humidity exhaust air can be used to heat and humidify fresh air. By utilizing this feature, the air-conditioning system can be effectively heat-recovered, thereby reducing the energy consumption of the air-conditioning system. At present, the sources of heat that may be recovered in buildings include exhaust heat, internal area heat, condenser exhaust heat, drainage heat, etc. The application of these waste heat recovery technologies has reduced building energy consumption to a certain extent and contributed to environmental protection.

[0004] In the prior art, due to the isolation effect between different rooms or spaces in a building, the waste heat quantity between rooms is different. When the waste heat is recovered and utilized, the efficiency of waste heat recovery is low, and all recoverable heat cannot be fully utilized, resulting in energy waste. Summary of the invention

[0005] The main purpose of the present invention is to propose a method and system for recycling waste heat in buildings, aiming to solve the technical problem that due to the isolation effect between different rooms or different spaces in buildings in the related technology, the waste heat quantity between rooms is different, and when the waste heat is recycled, the waste heat recovery efficiency is low, and all recoverable heat cannot be fully utilized, resulting in energy waste.

[0006] To achieve the above object, the present invention proposes a method for recycling waste heat from buildings, comprising the following steps:

[0007] According to the preset room data of the building, obtaining the current heat data of each preset room;

[0008] Determining in sequence the magnitude relationship between each of the current heat data and the preset heat; wherein the preset heat is the heat corresponding to the space in the building at a preset room temperature;

[0009] For each of the preset rooms, when the corresponding current heat data is greater than the preset heat, the waste heat recovery operation is performed on the corresponding preset room.

[0010] In one embodiment, the step of obtaining the current heat data of each preset room according to the preset room data of the building includes:

[0011] According to the preset room data of the building, the current temperature of each preset room is collected in sequence;

[0012] For each of the preset rooms, current heat data of each of the preset rooms is obtained according to the current temperature.

[0013] In one embodiment, the step of obtaining the current heat data of each preset room according to the current temperature for each preset room includes:

[0014] For each of the preset rooms, heat extraction is performed on each of the current temperatures to obtain current heat data of each of the preset rooms.

[0015] In one embodiment, the step of performing heat extraction on each of the current temperatures for each of the preset rooms to obtain current heat data of each of the preset rooms includes:

[0016] For each of the preset rooms, extracting temperature field data of the current temperature;

[0017] According to the extracted temperature field data, a heat conversion operation is performed to extract the heat of the preset rooms and obtain the current heat data of each of the preset rooms.

[0018] In one embodiment, the step of performing heat conversion operation according to the extracted temperature field data to extract the heat of the preset rooms and obtaining the current heat data of each of the preset rooms includes:

[0019] According to the extracted temperature field data, a heat conversion operation is performed using formula 1 to extract the heat of the preset room and obtain the current heat data of each preset room; wherein the formula 1 is:

[0020]

[0021] Q is heat, P is the pressure in the preset room, V is the pressure in the preset room, t2 is the final temperature in the preset room, t1 is the initial temperature of the preset room, ΔT is the temperature difference in the preset room, ΔT=t2-t1, and T is the room temperature of the preset room.

[0022] In one embodiment, before the step of performing heat conversion operation using formula 1 according to the extracted temperature field data to extract the heat of the preset rooms and obtaining the current heat data of each of the preset rooms, the method further includes:

[0023] Collecting pressure data, volume data and room temperature data in the preset room;

[0024] An ideal gas state equation is established based on the collected pressure data, volume data, and room temperature data; wherein the ideal gas state equation is expressed using Formula 2, which is:

[0025] PV=nRT

[0026] P is the pressure in the preset room, V is the pressure in the preset room, T is the room temperature of the preset room, n is the number of moles of gas, and R is the ideal gas constant;

[0027] According to the ideal gas state equation, the current heat data of each of the preset rooms is obtained.

[0028] In one embodiment, the step of obtaining the current heat data of each of the preset rooms according to the ideal gas state equation includes:

[0029] According to the ideal gas state equation, the system internal energy change value in the preset room is obtained; wherein the system internal energy change value is expressed by Formula 2, which is:

[0030] ΔU=QW

[0031] ΔU is the change value of the internal energy of the system, Q is the heat in the preset room, and W is the work done by the internal energy of the system in the preset room;

[0032] The current heat data of each of the preset rooms is obtained according to the system internal energy change value.

[0033] In one embodiment, for each of the preset rooms, when the corresponding current heat data is greater than the preset heat, the step of performing waste heat recovery and utilization operation on the corresponding preset room includes:

[0034] For each of the preset rooms, when the corresponding current heat data is greater than the preset heat, the heat collection device is controlled to perform waste heat recovery and utilization operations on the corresponding preset room.

[0035] In one embodiment, after the step of sequentially determining the magnitude relationship between each of the current heat data and the preset heat data, the method further includes:

[0036] When any of the current heat data is less than or equal to the preset heat, the magnitude relationship between the current heat data corresponding to the next preset room and the preset heat is determined until all the current heat data are traversed.

[0037] Based on the same technical concept, in a second aspect, the present invention further proposes a building waste heat recovery and utilization system, which applies the building waste heat recovery and utilization method described in the first aspect.

[0038] The technical solution of the present invention obtains the current heat data of each preset room according to the preset room data of the building, and judges the size relationship between each current heat data and the preset heat in turn. For each preset room, when the corresponding current heat data is greater than the preset heat, the corresponding preset room is subjected to waste heat recovery and utilization operations, so that the present invention can collect and utilize waste heat between different rooms or different spaces when in use. At the same time, according to the preset room data of the building, the current heat data of each preset room is obtained, and the size relationship between each current heat data and the preset heat is judged in turn. For each preset room, when the corresponding current heat data is greater than the preset heat, the corresponding preset room is subjected to waste heat recovery and utilization operations, so that the present invention can recycle waste heat that needs to be recycled, thereby ensuring the efficiency of recycling and avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0040] Figure 1 A schematic diagram of the structure of the method for recovering and utilizing waste heat from buildings provided by the present invention;

[0041] Figure 2 for Figure 1 Flowchart of step S100 exemplified in FIG.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The invention provides a method for recovering and utilizing waste heat from buildings.

[0047] See also Figure 1 to Figure 2 In one embodiment of the present invention, the method for recycling waste heat from buildings comprises the following steps:

[0048] S100, obtaining current heat data of each preset room according to the preset room data of the building;

[0049] In this embodiment, the specific process is:

[0050] Data collection and analysis: Acquisition of preset room data: First, it is necessary to collect the preset room data of the building, including basic information such as the room’s purpose, area, and thermal insulation performance.

[0051] Heat data acquisition: By installing sensors and data acquisition systems, the current heat data of each preset room can be monitored and recorded in real time.

[0052] Thermal Data Monitoring System: Sensor Deployment: Deploy temperature and humidity sensors in each room to monitor the environmental parameters in the room in real time.

[0053] Data Logger: Use data logger to collect sensor data and transmit it to the central processing system via wireless or wired network.

[0054] Data processing and analysis: Data analysis: Use big data and artificial intelligence technology to analyze the collected heat data and identify heat distribution and change trends.

[0055] Intelligent control: Based on the results of data analysis, the building's heating and cooling systems are intelligently adjusted to optimize energy efficiency.

[0056] Waste heat recovery technology: Heat recovery equipment: Install heat recovery equipment, such as heat exchangers, to recover waste heat inside the building, such as exhaust heat, condensation heat, etc.

[0057] Waste heat utilization: Recover waste heat for building heating or hot water supply, reducing dependence on traditional energy.

[0058] System integration and optimization: System integration: Integrate the waste heat recovery system with the building’s energy management system (EMS) to achieve automation and intelligent control of the system.

[0059] Performance optimization: Based on real-time and historical data, continuously optimize system performance and improve energy efficiency.

[0060] Extended application: Utilization of waste heat from data centers: For high-energy-consuming buildings such as data centers, their waste heat can be used to heat surrounding buildings, achieving cascade utilization of energy.

[0061] Bathing waste heat recovery: Research and apply bathing waste heat recovery technology to reduce building operation energy consumption by recovering waste heat from bathing wastewater.

[0062] Evaluate the initial investment and operating costs of the waste heat utilization system, as well as the energy costs saved. Evaluate the impact of waste heat utilization on reducing carbon emissions and environmental pollution.

[0063] S200, sequentially determining the magnitude relationship between each of the current heat data and the preset heat data; wherein the preset heat data is the heat data corresponding to the space in the building at a preset room temperature;

[0064] In this embodiment, the specific process is:

[0065] Data collection and preset heat determination: Preset heat calculation: Based on the preset room temperature of the building, the preset heat of each room is calculated using the building thermal performance data (such as the heat transfer coefficient of the envelope structure, building area, etc.). Actual heat data collection: The current heat data of each room is collected in real time through sensors installed inside the building.

[0066] Data analysis and comparison: Heat data comparison: Compare the collected current heat data with the preset heat to determine whether the heat demand corresponding to the preset room temperature is met.

[0067] Variance analysis: Analyze the difference between actual heat consumption and theoretical heat consumption, and identify the factors that cause the difference, such as user usage, outdoor weather conditions, building insulation performance, etc.

[0068] Application of waste heat recovery technology: Deployment of heat recovery equipment: Deploy heat recovery equipment in buildings, such as heat exchangers, to recover indoor waste heat, exhaust heat or condensation heat, etc.

[0069] Waste heat reuse: Recover waste heat to supply hot water to buildings or provide other equipment that requires thermal energy, reducing energy waste.

[0070] Intelligent control technology is used to realize automatic regulation of the waste heat recovery system and improve the energy efficiency of the system.

[0071] By establishing an integrated energy management system, the building's energy use can be monitored and optimized.

[0072] Evaluate the initial investment and operating costs of a waste heat recovery system, as well as the energy savings.

[0073] Assess the impact of waste heat utilization on reducing carbon emissions and environmental pollution.

[0074] S300. For each of the preset rooms, when the corresponding current heat data is greater than the preset heat, a waste heat recovery operation is performed on the corresponding preset room.

[0075] In this embodiment, the current heat data of each preset room is obtained according to the preset room data of the building, and the size relationship between each current heat data and the preset heat is judged in turn. For each preset room, when the corresponding current heat data is greater than the preset heat, the corresponding preset room is subjected to waste heat recovery and utilization operations, so that the present invention can collect and utilize waste heat between different rooms or different spaces when in use. At the same time, according to the preset room data of the building, the current heat data of each preset room is obtained, and the size relationship between each current heat data and the preset heat is judged in turn. For each preset room, when the corresponding current heat data is greater than the preset heat, the corresponding preset room is subjected to waste heat recovery and utilization operations, so that the present invention can recycle waste heat that needs to be recycled, thereby ensuring the efficiency of recycling and avoiding energy waste.

[0076] In one embodiment, step S100 includes:

[0077] S110, collecting the current temperature of each preset room in turn according to the preset room data of the building;

[0078] S120. For each of the preset rooms, obtain current heat data of each of the preset rooms according to the current temperature.

[0079] In one embodiment, the step of obtaining the current heat data of each preset room according to the current temperature for each preset room includes:

[0080] For each of the preset rooms, heat extraction is performed on each of the current temperatures to obtain current heat data of each of the preset rooms.

[0081] In one embodiment, the step of performing heat extraction on each of the current temperatures for each of the preset rooms to obtain current heat data of each of the preset rooms includes:

[0082] For each of the preset rooms, extracting temperature field data of the current temperature;

[0083] According to the extracted temperature field data, a heat conversion operation is performed to extract the heat of the preset rooms and obtain the current heat data of each of the preset rooms.

[0084] In one embodiment, the step of performing heat conversion operation according to the extracted temperature field data to extract the heat of the preset rooms and obtaining the current heat data of each of the preset rooms includes:

[0085] According to the extracted temperature field data, a heat conversion operation is performed using formula 1 to extract the heat of the preset room and obtain the current heat data of each preset room; wherein the formula 1 is:

[0086]

[0087] Q is heat, P is the pressure in the preset room, V is the pressure in the preset room, t2 is the final temperature in the preset room, t1 is the initial temperature of the preset room, ΔT is the temperature difference in the preset room, ΔT=t2-t1, and T is the room temperature of the preset room.

[0088] In one embodiment, before the step of performing heat conversion operation using formula 1 according to the extracted temperature field data to extract the heat of the preset rooms and obtaining the current heat data of each of the preset rooms, the method further includes:

[0089] Collecting pressure data, volume data and room temperature data in the preset room;

[0090] An ideal gas state equation is established based on the collected pressure data, volume data, and room temperature data; wherein the ideal gas state equation is expressed using Formula 2, which is:

[0091] PV=nRT

[0092] P is the pressure in the preset room, V is the pressure in the preset room, T is the room temperature of the preset room, n is the number of moles of gas, and R is the ideal gas constant;

[0093] According to the ideal gas state equation, the current heat data of each of the preset rooms is obtained.

[0094] In one embodiment, the step of obtaining the current heat data of each of the preset rooms according to the ideal gas state equation includes:

[0095] According to the ideal gas state equation, the system internal energy change value in the preset room is obtained; wherein the system internal energy change value is expressed by Formula 2, which is:

[0096] ΔU=QW

[0097] ΔU is the change value of the internal energy of the system, Q is the heat in the preset room, and W is the work done by the internal energy of the system in the preset room;

[0098] The current heat data of each of the preset rooms is obtained according to the system internal energy change value.

[0099] In one embodiment, for each of the preset rooms, when the corresponding current heat data is greater than the preset heat, the step of performing waste heat recovery and utilization operation on the corresponding preset room includes:

[0100] For each of the preset rooms, when the corresponding current heat data is greater than the preset heat, the heat collection device is controlled to perform waste heat recovery and utilization operations on the corresponding preset room.

[0101] In one embodiment, after the step of sequentially determining the magnitude relationship between each of the current heat data and the preset heat data, the method further includes:

[0102] When any of the current heat data is less than or equal to the preset heat, the magnitude relationship between the current heat data corresponding to the next preset room and the preset heat is determined until all the current heat data are traversed.

[0103] Based on the same technical concept, in a second aspect, the present invention further proposes a building waste heat recovery and utilization system, which applies the building waste heat recovery and utilization method described in the first aspect.

[0104] The present invention also proposes a building waste heat recovery and utilization system, which includes a detection device and a building waste heat recovery and utilization method. The specific structure of the building waste heat recovery and utilization method refers to the above embodiment. Since the building waste heat recovery and utilization system adopts all the technical solutions of all the above embodiments, it can solve the technical problem that the waste heat quantity between rooms is different due to the isolation effect between different rooms or different spaces in related technical buildings, and when the waste heat is recovered, the waste heat recovery efficiency is low, and all the recoverable heat cannot be fully utilized, resulting in energy waste. Therefore, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0105] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for recycling waste heat from buildings, characterized in that: The steps include: According to the preset room data of the building, obtaining the current heat data of each preset room; Determining in sequence the magnitude relationship between each of the current heat data and the preset heat; wherein the preset heat is the heat corresponding to the space in the building at a preset room temperature; For each of the preset rooms, when the corresponding current heat data is greater than the preset heat, the waste heat recovery operation is performed on the corresponding preset room.

2. The method for recycling waste heat from buildings according to claim 1, characterized in that: The step of obtaining the current heat data of each preset room according to the preset room data of the building comprises: According to the preset room data of the building, the current temperature of each preset room is collected in sequence; For each of the preset rooms, current heat data of each of the preset rooms is obtained according to the current temperature.

3. The method for recycling waste heat from buildings according to claim 2, characterized in that: The step of obtaining the current heat data of each preset room according to the current temperature for each preset room includes: For each of the preset rooms, heat extraction is performed on each of the current temperatures to obtain current heat data of each of the preset rooms.

4. The method for recycling waste heat from buildings according to claim 3, characterized in that: The step of extracting heat from each of the current temperatures for each of the preset rooms to obtain current heat data of each of the preset rooms includes: For each of the preset rooms, extracting temperature field data of the current temperature; According to the extracted temperature field data, a heat conversion operation is performed to extract the heat of the preset rooms and obtain the current heat data of each of the preset rooms.

5. The method for recycling waste heat from buildings according to claim 4, characterized in that: The step of performing heat conversion operation according to the extracted temperature field data to extract the heat of the preset rooms and obtain the current heat data of each of the preset rooms includes: According to the extracted temperature field data, a heat conversion operation is performed using formula 1 to extract the heat of the preset room and obtain the current heat data of each preset room; wherein the formula 1 is: Q is heat, P is the pressure in the preset room, V is the pressure in the preset room, t2 is the final temperature in the preset room, t1 is the initial temperature of the preset room, ΔT is the temperature difference in the preset room, ΔT=t2-t1, and T is the room temperature of the preset room.

6. The method for recycling waste heat from buildings according to claim 5, characterized in that: Before the step of performing heat conversion operation using formula 1 according to the extracted temperature field data to extract the heat of the preset rooms and obtain the current heat data of each of the preset rooms, the method further includes: Collecting pressure data, volume data and room temperature data in the preset room; An ideal gas state equation is established based on the collected pressure data, volume data, and room temperature data; wherein the ideal gas state equation is expressed using Formula 2, which is: PV=nRT P is the pressure in the preset room, V is the pressure in the preset room, T is the room temperature of the preset room, n is the number of moles of gas, and R is the ideal gas constant; According to the ideal gas state equation, the current heat data of each of the preset rooms is obtained.

7. The method for recycling waste heat from buildings according to claim 6, characterized in that: The step of obtaining the current heat data of each of the preset rooms according to the ideal gas state equation comprises: According to the ideal gas state equation, the system internal energy change value in the preset room is obtained; wherein the system internal energy change value is expressed by Formula 2, which is: ΔU=QW ΔU is the change value of the internal energy of the system, Q is the heat in the preset room, and W is the work done by the internal energy of the system in the preset room; The current heat data of each of the preset rooms is obtained according to the system internal energy change value.

8. The method for recycling waste heat from buildings according to claim 7, characterized in that: For each of the preset rooms, when the corresponding current heat data is greater than the preset heat, the step of performing waste heat recovery and utilization operation on the corresponding preset room includes: For each of the preset rooms, when the corresponding current heat data is greater than the preset heat, the heat collection device is controlled to perform waste heat recovery and utilization operations on the corresponding preset room.

9. The method for recycling waste heat from buildings according to claim 8, characterized in that: After the step of sequentially determining the magnitude relationship between each of the current heat data and the preset heat data, the method further includes: When any of the current heat data is less than or equal to the preset heat, the magnitude relationship between the current heat data corresponding to the next preset room and the preset heat is determined until all the current heat data are traversed.

10. A building waste heat recovery system, characterized in that: The method for recovering and utilizing waste heat from buildings as claimed in any one of claims 1 to 9 is used.

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