Low-grade energy driving and mechanical work driving combined heat pump or refrigerating system

Abstract

The invention discloses a low-grade energy driving and mechanical work driving combined heat pump or refrigerating system. A low-grade energy collector is connected with a generator, a first condenser, a refrigerant agent storage device, a first throttle valve, a condensation evaporator, an absorber, a liquid storage device, a solution pump, a solution heat exchanger and a generator in sequence; the high-pressure end of a compressor is connected with the solution heat exchanger, a second condenser, the condensation evaporator, a three-way valve, a second throttle valve, a winter evaporator and the low-pressure of the compressor in sequence; the three-way valve is connected with a third throttle valve, a summer evaporator and the low-pressure end of the compressor in sequence; and the concentrated solution outlet of the generator is connected with the solution heat exchanger and the absorber in sequence. The combined heat pump or refrigerating system has the advantages of all low-grade heat pumps and refrigerating systems. A compression heat pump and the refrigerating system are combined, and when the low-grade energy is sufficiently supplied, the COP of the system is greatly improved; when the low-grade energy is not sufficiently supplied, the system can be effectively operated; and when the low-grade energy is not supplied at all, the system can also be stably operated.

Description

technical field [0001] The invention relates to a compound heat pump or refrigeration system driven by low-grade energy and mechanical work. Background technique [0002] my country's reserves of fossil energy such as oil, natural gas, and coal are very limited on a per capita basis. Moreover, it is relatively arid, the land is severely desertified, and the environmental tolerance is relatively weak. The development and utilization of fossil energy is likely to bring very adverse effects on the environment. Therefore, the effective development and utilization of low-grade energy can make up for the shortage of fossil energy and improve the energy structure, which will have high social and economic value. [0003] Air-conditioning heat pumps and refrigeration systems are major energy consumers, and their power consumption accounts for about 15% of the total power consumption in society. But in industry and other fields, a lot of low-grade energy is not well utilized. In add...

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Problems solved by technology

[0004] For conventional low-grade energy, especially solar heat driven heat pumps, low efficiency of refrigeration cycles, high temperature requirements for heat sources, and difficulty in adapting to the discontinuity and instability of solar radiation itself, which have plagued the promotion of solar heat pumps and refrigeration, based on heat (cold) Quantitative Grading Principle

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