Novel carbon dioxide ice storage system

Abstract

The invention discloses a novel carbon dioxide ice storage system. During cold storage of the novel carbon dioxide ice storage system, a CO2 refrigerant evaporates in an evaporator to absorb heat of water in an ice storage tank, cold energy is stored in the ice storage tank, then the CO2 refrigerant enters a gas-liquid separator, a liquid refrigerant separated out by the gas-liquid separator returns to the evaporator again, and a gas refrigerant enters a compression cylinder of an electromagnetic type compression and expansion all-in-one machine. After compressed, the CO2 gas refrigerant flowsthrough a gas cooler, releases heat and is divided into two branches, one branch flows into an expansion cylinder of the electromagnetic type compression and expansion all-in-one machine to completeexpansion depressurization, the other branch flows through a throttle valve to achieve throttling depressurization, the two branches of depressurized refrigerants converge and then flow into the evaporator again to achieve phase change heat exchange, and the cold energy is stored in the ice storage tank. Performance of the ice storage system under the ice making working condition is improved, andthus the efficiency of the whole ice storage system is improved.

Description

technical field [0001] The invention relates to the field of ice storage systems, and more specifically relates to an ice storage system that improves the overall efficiency by improving the efficiency of a cold storage cycle. Background technique [0002] With the development of the economy, more and more central air-conditioning systems are used in buildings, which not only increases the power consumption, but also causes the imbalance of power consumption between day and night. It is an urgent task to transfer peak power consumption, achieve balanced power supply, reduce investment in power equipment, and save operating costs of refrigeration equipment. Ice storage is one of the important means to achieve this goal. And in recent years, people's requirements for environmental protection have been further deepened. Freon refrigerants are restricted because of their destructive effect on the atmospheric ozone layer. At present, a consensus has been reached in the world to ...

AI Technical Summary

Problems solved by technology

The traditional ice cold storage system needs to produce ice for cold storage in the low electricity price period, and in the ice making condition, in order to obtain ice at 0°C during the ice making operation, the evaporation temperature of the refrigerator often needs to be reduced to -8 Below ℃, due to the decrease of the evaporation temperature, the efficiency of the system will drop significantly, which will result in a decrease in the coefficient of performance (COP) of the refrigerator in the ice storage process at night, resulting in a waste of energy

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