Air source super heat pump and heat extraction method thereof

Abstract

The invention discloses an air source super heat pump and a heat extraction method thereof, and belongs to the technical field of energy utilization. The air source super heat pump comprises a regenerator, a condenser, an absorber, a heat exchanger, an energy tower, compressors, a circulating pump, a valve and a driving heat source. According to the air source super heat pump, a heat pump unit forpreparing hot water or cold water through air energy is adopted to extract or release heat from air through a regeneration process, an absorption process and a compression process so as to achieve the purpose of large-range heating or refrigeration, and the heating capacity of a single air source super heat pump is 1-30 MW; and three operation modes are adopted to meet heating or refrigerating requirements, the heat pump has no frosting problem in a heating mode, and meanwhile, the outlet temperature of hot water and cold water is adjusted by controlling the compression ratio of the two compressors in the operation process.

Description

technical field [0001] The invention belongs to the technical field of energy utilization, and in particular relates to an air source super heat pump and a method for extracting heat thereof. Background technique [0002] The air source heat pump can extract heat from the low-temperature outdoor air to heat the room. Since its COP (coefficient of performance) is greater than 1, 1 share of electricity can produce more than 1 share of heat, so it has significant performance compared to electric boilers and other methods. Advantage. However, limited by the structure type of the air heat exchanger and the capacity of the compressor, the heating capacity of a single air source heat pump is small. When hot water is taken, when the outdoor air temperature is lower than 0°C, frosting on the surface of the surface cooler is a technical problem that plagues its normal operation. The current defrosting technology mainly uses cycle reversal to switch the heating mode For refrigeration...

AI Technical Summary

Problems solved by technology

However, limited by the structure type of the air heat exchanger and the capacity of the compressor, the heating capacity of a single air source heat pump is small. When hot water is taken, when the outdoor air temperature is lower than 0°C, frosting on the surface of the surface cooler is a technical problem that plagues its normal operation. The current defrosting technology mainly uses cycle reversal to switch the heating mode For refrigeration working conditions, the surface cooler is heated by internal circulating working fluid, which cannot guarantee the continuous production of hot water

In addition, the current technology for large-scale air source heat pumps is to use cooling towers or energy towers as the cooling source. When using cooling towers or energy towers, intermediate circulating water is required as the heat exchange medium. Because the circulating water needs to be extracted from the air first heat, and then use the air source heat pump to extract heat from the circulating water, so the two heat exchange processes cause the evaporation temperature of the air source heat pump to be much lower than the air temperature, which in turn leads to a decrease in the performance of the air source heat pump

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