Heat Supply System with Dual-Source Temperature-Based Device Switching
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Solution Overview
Problem
Conventional heat supply systems do not efficiently operate heat source devices based on the specific states of heat utilization devices, leading to suboptimal energy usage and efficiency.
Innovation Solution
A heat supply system with a heat medium return and outward path, a flow state adjustment device, and a control system that manages the operation of heat source devices, including a combined heat and power supply device and a boiler, to optimize heat distribution and usage based on temperature detection and time zones, ensuring efficient operation of heat source devices according to the state of heat utilization devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a heat source device with large heat output is operated to quickly heat hot water in the hot water storage tank, then the heating speed is improved, but energy efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts the operating state of heat source devices based on real-time detection of hot water temperature and storage tank state. The control device switches between different heat source devices (high-output vs. high-efficiency) depending on whether the tank needs rapid heating or can tolerate slower heating, thereby optimizing the balance between heating speed and energy efficiency.
Solution Approach 2:
The system changes operational parameters by selecting different heat source devices with different characteristics (output capacity and efficiency ratings) based on the current state of the hot water storage tank. When the tank is nearly empty or temperature is low, a high-output device is selected; when the tank has sufficient hot water, a high-efficiency device is selected.
2Use of energy by moving object
If a heat source device with high energy efficiency is operated to slowly increase hot water temperature, then energy efficiency is improved, but heating speed deteriorates
Solution Approach 1:
The control system dynamically selects heat source devices based on real-time conditions. When the hot water storage tank has sufficient hot water inventory, the system switches to a high-efficiency heat source device that operates more slowly but consumes less energy, thereby optimizing energy efficiency without compromising system responsiveness.
Solution Approach 2:
The system performs preliminary heating using high-efficiency devices when conditions allow (sufficient hot water in tank), preparing hot water in advance during periods of low demand, so that high-output devices are only activated when truly necessary, thereby maximizing energy efficiency over time.
3Ease of operation
If priority ranks are set in advance for heat source devices, then operational simplicity is improved, but adaptability to specific states of heat utilization devices deteriorates
Solution Approach 1:
The system incorporates feedback mechanisms where temperature detection devices continuously monitor the state of heat utilization devices (hot water storage tank temperature and level). This feedback information is fed to the control device, which automatically adjusts the selection and operation of heat source devices, thereby maintaining both operational simplicity and high adaptability to changing conditions.
Solution Approach 2:
The control system operates autonomously by automatically detecting the state of heat utilization devices and selecting appropriate heat source devices without manual intervention. The system serves itself by making real-time decisions based on detected conditions, eliminating the need for complex manual priority setting while maintaining high adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively utilizes heat from both high and low output devices, prioritizing energy-efficient operations and extending the usage period of the combined heat and power supply device, thereby enhancing overall system efficiency and energy utilization.
Implementation Method 1
a heat exchange unit is provided inside of the tank of the hot water storage device, and by the heat exchange unit exchanging heat between the hot water stored in the tank and the heat medium, the temperature of the hot water being stored inside of the tank is increased
Implementation Method 2
a circulation pump that circulates the heat medium in the heat medium return path and the heat medium outward path
Data Source
AI summary
A heat supply system with a first temperature detection unit that detects a first temperature of hot water in a tank and a second temperature detection unit that detects a second temperature above the first temperature detection unit. When the first temperature is a first lower limit temperature or less, where a temperature increase operation by a combined heat and power supply device is permitted, a control device operates the combined heat and power supply device and flow state adjustment devices such that a heat medium circulates between the combined heat, power supply device, and hot water storage device. When the second temperature is a second lower limit temperature or less, where a temperature increase operation by a boiler device is permitted, the control device operates the boiler device and the flow state adjustment devices such that the heat medium circulates between the boiler device and hot water storage device.