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Gas engine compression absorption compound heat pump heat supply method with series and parallel switching

A technology of gas engine and gas engine, which is applied to the operation mode of machines, machines and pumps that use waste heat, etc. It can solve the problems of increased power consumption of compressors, attenuation of heating capacity, and limitations on the application range of gas engine-driven composite heat pump systems, etc. problems, to achieve the effects of reducing discharge temperature, reducing power consumption, and efficient and clean utilization

Active Publication Date: 2019-03-08
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the outdoor ambient air temperature decreases, the power consumption of the compressor increases and the heating capacity of the composite heat pump system decreases greatly, which severely limits the application range of the gas engine-driven composite heat pump system.

Method used

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  • Gas engine compression absorption compound heat pump heat supply method with series and parallel switching
  • Gas engine compression absorption compound heat pump heat supply method with series and parallel switching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In warm areas, take floor heating radiation heating as an example, when the return water temperature of the heat user is 35°C, and the best ambient air temperature for mode switching is 0°C, the specific control method is as follows:

[0031] When the outdoor air temperature is higher than or equal to 0 ℃, the heating method of gas engine compression absorption compound heat pump switching in series and parallel is parallel mode. When the ambient temperature is 10°C, the specific process is as follows: natural gas and air enter the gas engine 1 through the natural gas and air inlet A of the gas engine to burn and provide power for the gas engine 1, and the gas engine 1 drives the compressor 2 to convert the refrigerant into the compression heat pump system Compressed into a gaseous state at 75°C, the gaseous refrigerant passes through the oil separator 3 to separate lubricating oil and refrigerant, the lubricating oil returns to the compressor, and the refrigerant passes...

Embodiment 2

[0035] In cold regions, take radiant floor heating as an example, when the return water temperature is 35°C and the best ambient air temperature when switching modes is -5°C, the specific control methods are as follows:

[0036]When the outdoor air temperature is higher than or equal to -5°C, the gas engine compression absorption compound heat pump heating method switched in series and parallel is the parallel mode. When the ambient temperature is -5°C, the specific process is: natural gas and air enter the gas engine 1 through the natural gas and air inlet A of the gas engine to burn and provide power for the gas engine 1, and the gas engine 1 drives the compressor 2 to cool the compression heat pump system The refrigerant is compressed into a gaseous state at 65°C. The gaseous refrigerant passes through the oil separator 3 to separate lubricating oil and refrigerant, and the lubricating oil returns to the compressor. The refrigerant passes through the first condenser 4 to exc...

Embodiment 3

[0040] In severe cold areas, take floor heating radiation heating as an example, when the return water temperature of the heat user is 35°C, and the best ambient air temperature when the mode is switched is -10°C, the specific control steps are as follows:

[0041] When the outdoor air temperature is higher than or equal to -10°C, the gas engine compression absorption compound heat pump heating method switched in series and parallel is the parallel mode. When the ambient temperature is -10°C, the specific process is: natural gas and air enter the gas engine 1 through the natural gas and air inlet A of the gas engine to burn and provide power for the gas engine 1, and the gas engine 1 drives the compressor 2 to cool the compression heat pump system The refrigerant is compressed into a gaseous state at 55°C. The gaseous refrigerant passes through the oil separator 3 to separate the lubricating oil and refrigerant, and the lubricating oil returns to the compressor. The refrigerant...

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Abstract

The invention discloses a gas engine compression-absorption composite heat pump heat supply method switched between series and parallel, including a parallel mode and a series mode. When the ambient temperature is high, the compound heat pump heating system turns on the parallel mode, and the user's return water is divided into two paths, one path of return water is heated by the first condenser, cylinder liner heat exchanger, and flue gas heat exchanger in turn through the connecting pipe; the other path The return water passes through the connecting pipe in turn through the first valve, the second water pump, the absorber, and the second condenser, and the fourth valve is mixed with the hot water from the previous path. When the ambient temperature is low, the composite heat pump heating system turns on the series mode, and the user return water is sequentially heated by the first condenser, cylinder jacket heat exchanger, and flue gas heat exchanger to form user water supply. This method can not only greatly increase the overall heating capacity of the system, but also reduce the discharge temperature of flue gas.

Description

technical field [0001] The invention relates to a compound heat pump heat supply method, in particular to a series-parallel switching gas engine compression absorption compound heat pump heat supply method. Background technique [0002] The gas engine-driven compression heat pump system uses clean energy such as natural gas or biogas as fuel, and the gas engine drives the compressor to realize the heating cycle. The advantage is that it can fully recover the waste heat of the gas engine cylinder liner and flue gas, thereby improving the primary energy utilization rate of the gas engine-driven compression heat pump system. However, the waste heat of the gas engine is directly used for auxiliary heating or domestic hot water through heat exchange, and there is a huge irreversible loss. [0003] In the existing technology, there is a combined heat pump system (application number: CN201620123449.1 and CN201610087543.0) of a compression heat pump driven by gas engine power and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B25/02F25B27/02F25B41/00F04B35/00F25B41/40
CPCF04B35/002F25B25/02F25B27/02F25B41/40Y02A30/274
Inventor 刘凤国李亚军董付江加磊磊田中允张蕊
Owner TIANJIN CHENGJIAN UNIV
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