Ice storage air conditioning system cmbined with internally and externally melting ice

Abstract

The ice accumulating air conditioner system consists of a cool carrier loop comprising refrigerator, ice accumulator, heat exchanger, cool carier pump, cool carrier pressure stabilizer, electrically regulating valve and electrically opening and closing valve; and an air conditioning water loop comprising water pump, water pressure stabilizer, water collector, water distributor, ice accumulator, heat exchanger and electrically regulating valve. It may have one additional ice and water loop comprising ice water pump, heat exchanger and electrically regulating valve. It may realize cool supplying via three including mechanically, internally and externally, ice thawing modes alone or unitedly. The present invention makes the refrigerator in air conditioner system operate in non-peak hour and this raises the air conditioning quality and lowers the expense.

Description

technical field [0001] The invention relates to the technical field of energy storage air conditioning, in particular to an ice storage air conditioning system combining internal and external ice melting. Background technique [0002] Ice-storage air-conditioning uses the cheap electricity in the low-load period of the power grid to cool through the refrigerator, and stores the cold energy in the form of latent heat in the ice. During the peak period of electricity consumption when the electricity price is expensive, the ice is melted to release the cold energy to meet the cooling load of the air conditioner. On the one hand, ice-storage air-conditioning can balance the load of the power grid, and on the other hand, it can save users the cost of air-conditioning operation, so it has good social and economic benefits. [0003] With the rapid development of ice storage air conditioners, since melting ice can increase the lower outlet water temperature, large temperature differ...

AI Technical Summary

Problems solved by technology

[0004] The existing coil system basically adopts the method of internal ice melting, that is, the brine flows in the coil, and transfers heat to the ice (water) in the ice storage tank through the coil wall, because the (ice) in the ice storage tank The water basically remains in a static state, and the heat transfer efficiency is poor, resulting in a small melting rate, and it is difficult to provide a low-temperature refrigerant; secondly, the system also needs a heat exchanger to transfer the cooling capacity of the refrigerant to the air conditioner. Water makes it difficult for the temperature of the frozen water to be lower than 5°C, while the low-temperature air supply system often requires the temperature of the frozen water to be below 5°C, or even below 3°C

[0005] Due to the low rate of internal ice melting and the need for a heat exchanger to transfer the cooling capacity from the brine to the frozen water, even if there is a large amount of ice in the ice storage tank during the peak electricity consumption period when the electricity price is high, the Melting ice cannot meet the requirements of cooling load, so the refrigerator has to be turned on for combined cooling, which cannot fully utilize the advantages of ice-storage air-conditioning power grid shifting peaks and valleys and saving operating costs

[0006] A small number of existing systems also use external ice melting, including external ice melting systems using closed ice storage tanks, open ice storage tank external ice melting systems with external ice melting fin coils inside, and open ice storage tanks Although the external ice melting system can provide a lower outlet water temperature than the internal ice melting system, when the load is heavy, the ice melting rate will still be insufficient.

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