Integrated air-conditioning system of solar-assisted soil source CO2 trans-critical heat pump

Abstract

The invention discloses a solar-energy soil ultra-critical carbon dioxide heat pump air-conditioning system. The invention comprises an ultra-critical carbon dioxide heat pump medium circulator, a solar-energy collector, an underground tube heat exchanger, and an indoor air-conditioning tube. The invention arranges heat exchange coil tube, evaporator / gas cooler in the heat accumulating box, via four-way valve and valves to connect them into one air-conditioning system. The invention can work in five modes as heating, refrigerating, heating water, heating-heating water, and refrigerating-heating water, to heat water, refrigerate and supply heat.

Description

technical field [0001] The invention belongs to the technical scope of solar energy utilization and air-conditioning, and particularly relates to a solar-assisted soil source transcritical carbon dioxide heat pump integrated air-conditioning system. Specifically, it combines the solar heat collection system with the soil source transcritical carbon dioxide heat pump air conditioning system, and forms a triple supply of heating, cooling and hot water through the coordination of the solar heat collection system, the buried pipe heat exchange system and the heat pump air conditioning system. integrated system. Background technique [0002] As a natural substance, carbon dioxide is an ideal refrigerant. Its advantages are that it is non-toxic, non-flammable, has zero ODP value, low greenhouse effect, low price, no need for recycling, and no unforeseen side effects to the environment. At present, as a hot research field in the refrigeration industry, the research work of transcr...

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Problems solved by technology

And the operation cycle of the air-conditioning equipment is very intermittent, which causes the equipment to be idle and increases the cost

For an independent solar heat collection system, it is seriously affected by weather factors, and there is a great deal of intermittency and instability; for an independent soil source heat pump system, especially in northern regions, the heating time is much longer than the cooling time, which will cause the soil temperature to fluctuate. decrease, so the coefficient of performance will continue to decrease

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