Absorption Heat Pump Layout for Thermal Isolation and Pump-Free Flow
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Solution Overview
Problem
Existing absorption heat pump systems suffer from heat loss and inefficiency, particularly when operating under low load conditions, due to inadequate separation of high-temperature and low-temperature devices and reliance on separate pumps for pressure differences.
Innovation Solution
The absorption heat pump unit is designed with a case divided into two chambers, separating high-temperature devices like the regenerator and boiler from low-temperature devices like the evaporator and absorber, and utilizing pressure differences and a Venturi part to facilitate fluid movement without external pumps, even at low loads, with horizontal refrigerant inlet and outlet configurations to reduce pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If high-temperature devices (regenerator, boiler) are placed close to low-temperature devices (evaporator, absorber) in a compact case, then device integration and space utilization are improved, but heat loss increases due to thermal transfer between chambers
Solution Approach 1:
The case is divided into two separate chambers by a dividing wall: a first chamber containing high-temperature devices (regenerator, boiler, condenser) and a second chamber containing low-temperature devices (evaporator, absorber). This segmentation physically isolates thermal zones, preventing heat loss while maintaining compact integration of all components within the divided case structure.
2Reliability
If separate pumps are used to maintain pressure differences in the heat pump unit, then refrigerant and absorbent solution circulation are ensured, but device complexity and energy consumption increase
Solution Approach 1:
The system utilizes natural pressure differences generated during operation to drive fluid circulation. The refrigerant circulates from the condenser to the evaporator driven by pressure differential, and the absorbent solution flows from the regenerator to the absorber using pressure head, eliminating the need for separate pumps and reducing system complexity while maintaining reliable circulation.
3Speed
If the refrigerant outlet of the condenser and refrigerant inlet of the evaporator are positioned at different heights, then gravitational flow is facilitated, but excessive pressure difference requires additional pumping
Solution Approach 1:
The refrigerant outlet of the condenser and the refrigerant inlet of the evaporator are positioned at substantially the same height level, creating equipotential conditions that balance gravitational effects. This positioning allows pressure-driven flow to occur without excessive pressure differences, enabling natural circulation without requiring additional pumping while maintaining adequate flow speed.
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 reduces heat loss, enhances operational efficiency by minimizing the need for separate pumps, and allows for efficient refrigerant and absorbent solution circulation, even under small operating loads, thereby improving overall system performance.
Implementation Method 1
an evaporator for absorbing heat from an external source and evaporating a refrigerant to create refrigerant vapor
Implementation Method 2
an absorber for absorbing the refrigerant vapor created by the evaporator into an absorbent solution
Implementation Method 3
a regenerator for heating the absorbent solution created in the absorber to separate the refrigerant vapor from the absorbent solution
Implementation Method 4
a condenser for condensing the refrigerant vapor separated in the regenerator and releasing the heat to the exterior
Implementation Method 5
a water supply tube designed to cause water to flow to the absorber and the condenser in order to cool the absorbent solution in the absorber
Implementation Method 6
a boiler placed in the path of the water supply tube to reheat hot water
Data Source
AI summary
A boiler-equipped absorption heat pump unit in which a regenerator, a boiler, and other high-temperature devices are separated from an evaporator, an absorber, and other low-temperature devices are separated by an insulated dividing wall. The dividing wall reduces heat loss by impeding the transfer of heat from the high-temperature devices to the low-temperature devices.