A kind of solar energy absorbing and compressing composite refrigeration system and its method

Abstract

The invention discloses solar absorbing compressing combined type refrigerating system and method. The system is characterized in that a heat collector is sequentially connected with a first valve, a high-pressure generator and a circulating pump and is also sequentially connected with a second valve, a low-pressure generator and another circulating pump; the high-pressure generator is sequentially connected with the low-pressure generator, a third valve, a first condenser, a first throttling valve, a sub-cooler and an absorber; the absorber is sequentially connected with a fourth valve, a first solution circulating pump, a high-temperature solution heat exchanger, the high-pressure generator and a fifth valve and is also sequentially connected with a second solution circulating pump, a low temperature solution heat exchanger and a low-pressure generator; a compressor is sequentially connected with a second condenser, the sub-cooler, a second throttling valve and an evaporator. According to the solar absorbing compressing combined type refrigerating system, a solar refrigerating device is provided and has the characteristics of being economic and efficiently and reliably refrigerating in case of attenuation and shortage of solar radiation; the double-effect cyclic running is performed in case of relatively high temperature in the high-pressure generator, and otherwise, the single-effect cyclic running is performed.

Description

technical field [0001] The invention relates to a refrigeration system and a refrigeration process thereof, in particular to a solar energy absorption and compression composite refrigeration system and a method thereof. Background technique [0002] The energy consumption of air conditioners has become the main factor for the shortage of power supply in summer in many big cities in my country. In recent years, air-conditioning energy consumption has continued to grow and has accounted for more than 50% of building energy consumption. In addition, the huge air-conditioning power consumption also seriously restricts the further improvement of my country's energy conservation and emission reduction. Therefore, reducing the energy consumption of air conditioners will effectively alleviate the contradiction of power supply and significantly promote the sustainable development of society and economy. Solar energy is a green and clean energy with an extremely large amount of reso...

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Problems solved by technology

[0005] The inventors found that the compressor in the prior art cannot directly assist the generator, so when the temperature of the high-voltage generator falls below a threshold due to insufficient solar radiation, the double-effect absorption subsystem stops operating, and when the high-pressure After the generator temperature gradually recovers and exceeds the threshold, the double-effect absorption subsystem is back to work

The intermittent working mode of the double-effect absorption subsystem will cause frequent and large step changes in the operating conditions of the compressor, resulting in a significant decline in the reliability of the system operation

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