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Commercial refrigeration cold storage agent and cold storage system (1)
commercial refrigeration cold storage agent and cold storage system
1. Cold storage agent
commercial refrigeration The main cold storage agents are water ice and eutectic ice.
Water ice is a pure substance, easy to obtain and environmentally friendly, but its melting point is fixed.
eutectic ice has different melting points due to the different types of solutes contained, which can be adjusted artificially. When the eutectic solution freezes at the eutectic temperature, it releases latent heat like a pure liquid, and absorbs heat when it melts, so eutectic ice can be used to store cold. When the refrigerator stops working, the eutectic ice melts and absorbs heat to cool the object to be cooled. The cold plate with eutectic ice is very suitable for use in refrigerated trucks for transporting frozen food. When the vehicle is driving during the day, the eutectic ice is used to provide cold for the refrigerated vehicle. Due to the constant temperature during the melting process, the temperature inside the vehicle does not change much. When the refrigerated truck is in storage at night, the refrigerator can work as long as the power supply of the refrigerator on the base of the truck is plugged into the power supply line. Through overnight refrigeration, eutectic ice is re-formed in the cold plate to provide cold storage for the next day driving. The
refrigerant (whether it is a refrigerant or a cold storage agent) will further increase the temperature difference between the first refrigerant and the object to be cooled, and increase the total irreversible heat transfer loss.
2. Ice storage system
With the development of economy, the central air-conditioning system used in buildings is increasing. Not only does the electricity use increases, it also causes the imbalance of electricity consumption day and night. It is an urgent task to transfer peak power consumption, achieve balanced power supply, reduce power equipment investment, and save cooling equipment operating costs. Ice storage is one of the important means to achieve this goal.
ice storage system
system consists of three parts: refrigeration system, ice storage tank and cold-using system, forming a cold storage cycle and a cold release cycle. At night, the refrigeration system is activated to store the cold in the ice storage tank. During the day, the ice in the tank gradually melts, and the cold is transported to the cold place for commercial refrigeration through the heat exchanger.
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