Adsorption Heat Pump Reactor Switching for Stable Cooling
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Solution Overview
Problem
In adsorption heat pumps, the adsorption amount of the heat exchange medium by the adsorbent decreases as the adsorption temperature rises, leading to a decrease in cooling generation efficiency.
Innovation Solution
A heat pump system with multiple reactors and a switching mechanism that alternates the connection of reaction sections between the evaporator and a secondary reactor, maintaining efficient cooling generation by utilizing a second reactor with higher adsorption capacity when the adsorption temperature increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single adsorption device is used in the heat pump system, then the device complexity is low, but the cooling generation efficiency decreases as adsorption temperature rises due to reduced adsorption amount
Solution Approach 1:
The single adsorption device is divided into multiple independent adsorption devices (first adsorption device and second adsorption device). Each device can operate independently, allowing the system to maintain high cooling generation efficiency by switching between devices based on temperature conditions, while distributing the complexity across modular components.
Solution Approach 2:
The system dynamically switches between the first and second adsorption devices based on operating conditions, particularly adsorption temperature. The switching mechanism allows the system to adapt to changing temperature conditions, maintaining optimal adsorption amount and cooling efficiency by selecting the appropriate device for current operating conditions.
2Productivity
If multiple adsorption devices with switching mechanism are used, then cooling generation efficiency is maintained at elevated temperatures, but the device complexity increases
Solution Approach 1:
The second adsorption device is prepared in advance as a standby unit with higher adsorption capacity. When temperature conditions deteriorate the performance of the first device, the system can immediately switch to the pre-prepared second device, maintaining cooling efficiency without requiring real-time adjustments to the device itself.
Solution Approach 2:
The system changes the operational parameter (which adsorption device is active) based on temperature conditions. By switching between devices with different characteristics, the system maintains optimal adsorption amount across varying temperature ranges, effectively adapting to parameter changes in the operating environment.
3Quantity of substance
If the adsorption temperature rises during operation, then the adsorption amount decreases, but the cooling generation efficiency can be maintained through reactor switching
Solution Approach 1:
The switching mechanism acts as an intermediary between the temperature condition and the adsorption process. When temperature rises and reduces adsorption amount in the first device, the system introduces the second adsorption device as an alternative pathway, maintaining the required adsorption amount despite the temperature increase.
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 configuration maintains cooling generation efficiency by leveraging the higher adsorption capacity of the secondary reactor at elevated temperatures, preventing a decrease in cooling output due to rising adsorption temperatures.
Implementation Method 1
an evaporator including an evaporation section that evaporates a first heat exchange medium
Implementation Method 2
including a flow section through which a second heat exchange medium flows
Implementation Method 3
a reaction section in which the first heat exchange medium that has been evaporated in the evaporator reacts and that retains the first heat exchange medium
Implementation Method 4
out of, for example, physical adsorption, chemical adsorption, absorption, or chemical reactions
Implementation Method 5
adsorption heat is generated when an adsorbent in the adsorption device adsorbs a heat exchange medium
Data Source
AI summary
An adsorption heat pump includes: an evaporator/condenser including a section that evaporates a first heat exchange-medium and pipe through which a second heat exchange-medium flows; first adsorption devices, each including an adsorption-section in which the first heat exchange-medium that has been evaporated reacts and retains the first heat exchange-medium, and pipe through which the second heat exchange-medium flows; and second adsorption device in which first heat exchange-medium that has been released from the first adsorption devices reacts and retains the first heat exchange-medium. The adsorption-section of the first adsorption device in a state reacting with the first heat exchange-medium is in communication with the evaporator/condenser section, and the adsorption-section of the first adsorption device is in a state having adsorbed the first heat exchange-medium is in communication with the second adsorption device adsorption-section, and the first adsorption device pipe is connected to the evaporator/condenser pipe in series, thereby generating cooling.