Compressed air cold storage system based on open type reverse Brayton cycle and control method

Abstract

The invention discloses a compressed air cold storage system based on an open type reverse Brayton cycle and a control method. The system comprises a compressor, a heat exchanger, a gas tank, an expansion machine, a cooling tower, a cooling water pump and a plurality of valves; normal-temperature and normal-pressure air is introduced into a gas inlet of the compressor, a gas outlet of the compressor is connected with a gas inlet of the heat exchanger, a gas outlet of the heat exchanger is connected with a gas inlet of the gas tank through a first valve, a gas outlet of the gas tank is connected with a gas inlet of the expansion machine through a second valve, and a gas outlet of the expansion machine is connected with a cold using place; a working medium inlet of the heat exchanger is connected with a cold water outlet of the cooling tower through a cooling water pump, and a working medium outlet of the heat exchanger is connected with a hot water inlet of the cooling tower; and the normal-temperature and normal-pressure air is compressed by the compressor to generate high-pressure and high-temperature air, the high-pressure and high-temperature air releases heat in the heat exchanger, and the formed high-pressure and normal-temperature air is stored in the gas tank. According to the system, the structure is simple, few power consumption parts are adopted, the operation mode can be switched, and the total energy utilization rate is high.

Description

technical field [0001] The invention belongs to the field of mechanical engineering design, and in particular relates to a compressed air cold storage system and a control method based on an open reverse Brayton cycle. Background technique [0002] Air refrigeration technology has been mastered by people for a long time. In 1844, American J.Corrie produced the first air refrigerator used in the field of refrigeration and air conditioning, but because its refrigeration efficiency was lower than that of vapor compression refrigerators, it was only It is used in some small ranges such as aircraft air conditioners. With the continuous development of turbomachinery, the air refrigerator that has been silent for many years has come back to life, and it has re-emerged on the stage of history in the field of general refrigeration. It has other advantages when obtaining lower temperatures, especially below -80°C. The incomparable economic superiority of the refrigeration cycle has a...

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Problems solved by technology

[0002] Air refrigeration technology has been mastered by people for a long time. In 1844, American J.Corrie produced the first air refrigerator used in the field of refrigeration and air conditioning, but because its refrigeration efficiency was lower than that of vapor compression refrigerators, it was only Applied in some small ranges such as aircraft air conditioners

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