Chemical Heat Pump Layout for Low-Temperature Heat Storage
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Solution Overview
Problem
Chemical heat pumps face limitations in efficiently storing heat from low-temperature gases and raising the output temperature of gases in the heat dissipation mode, as existing heat storage materials either fail to store heat effectively at low input temperatures or raise the output temperature insufficiently.
Innovation Solution
A chemical heat pump design featuring multiple heat storage materials with different conversion temperatures, strategically positioned within the reaction section to optimize heat storage and dissipation, where higher conversion temperature materials are closer to the fluid flow path in the heat storage mode and lower conversion temperature materials are used in the heat dissipation mode, with a secondary fluid passage to control ambient pressure and maintain constant conversion temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple heat storage materials with different conversion temperatures are used, then both heat storage from low-temperature gases and temperature elevation of output gases can be achieved, but the device complexity increases
Solution Approach 1:
Multiple heat storage materials with different conversion temperatures are combined within a single reaction section, eliminating the need for separate devices for heat storage and heat dissipation. This integration achieves both functions while managing complexity through unified design.
Solution Approach 2:
The reaction section is designed to perform multiple functions: heat storage from low-temperature gases, heat dissipation, and temperature elevation of output gases. This multi-functionality is achieved by incorporating various heat storage materials with different conversion temperatures in different regions of the same reaction section.
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
This design allows for efficient heat storage from low-temperature gases and effective temperature elevation of output gases, enhancing the overall heat storage and dissipation capabilities of the chemical heat pump.
Implementation Method 1
an endothermic reaction of the hydrate occurs according to the 'second property', so that the hydrate dehydrates to be converted into the heat storage material itself (=dehydrated material), and the temperature of the heat storage material increases (that is, the heat storage material stores heat)
Implementation Method 2
an 'exothermic reaction' occurs between of the 'heat storage material (=dehydrated material in the reaction section' and the 'water vapor' according to the 'first property', so that the heat storage material dissipates heat and is converted into a hydrate
Implementation Method 3
The water vapor that has reached the condensing section is converted into water (liquid) by phase transition (condensation), and the water is stored in the condensing section
Implementation Method 4
the water vapor generated by phase transition (evaporation) of the water in the condensing section flows to the reaction section from the condensing section
Implementation Method 5
When the high-temperature gas flowing in the first flow channel passes a position at which the heat exchange is performed, the hydrate of the heat storage material in the reaction section receives heat from the high-temperature gas
Implementation Method 6
When the low-temperature gas flowing in the first fluid flow channel passes a position at which the heat exchange is performed, the 'low-temperature gas' receives the heat generated by the heat dissipation of the heat storage material
Data Source
AI summary
A chemical heat pump includes a reaction section containing a heat storage material, a condensing section enabling a phase transition between water vapor and water, a connecting section connecting the reaction section and the condensing section, a valve adapted to open or close the connecting section, and a first fluid passage. The reaction section contains a plurality of heat storage materials having respective different conversion temperatures at which the heat storage material and the hydrate thereof are converted into each other. The plurality of heat storage materials and the first fluid passage are arranged so that the fluid flowing in the first fluid passage can perform heat exchanges with the heat storage materials in such a manner that the higher the conversion temperature of the heat storage material, the closer the position of the heat exchange to “the first side” of the first fluid passage.