A hot water cascade heating preparation system that realizes deep recovery of condensation heat in cold storage

Abstract

The invention provides a hot water cascade heating preparation system that realizes deep recovery of condensation heat in a cold storage, including a refrigeration unit, an electric compression heat pump, a hot water storage tank, a circulating water pump, a high-temperature plate heat exchanger, a low-temperature plate heat exchanger, and auxiliary electric heater. The system includes three operating conditions, the three operating conditions include waste heat recovery heating operating conditions, electric compression heat pump maintenance operating conditions and non-heating operating conditions. When in use, an appropriate heat source can be selected according to the hot water temperature requirement, and a cascaded heating system with matching temperature can be constructed. This system can realize the deep recovery of condensation heat in the cold storage for the preparation of hot water. On the one hand, it can significantly reduce the boiler gas consumption and reduce the production cost in the factory. On the other hand, it can improve the cooling capacity of the condensing system, thereby improving the energy efficiency of the refrigeration system. Compare.

Description

technical field [0001] The invention belongs to the field of waste heat recovery of refrigeration systems, and relates to a hot water cascade heating preparation system for realizing deep recovery of condensation heat in a cold storage. Background technique [0002] Meat and other food processing industries need to consume a lot of steam and hot water. At present, gas-fired boilers are mostly used for preparation. With the price of natural gas rising year by year, the heating cost is 4 to 5 times that of coal. [0003] On the other hand, this industry is usually equipped with cold storage, and its condensing system needs to cool the high-temperature ammonia gas at 80-100°C to about 25°C, and the large amount of condensation heat released is directly discharged into the air, causing huge energy waste. In addition, in summer, Affected by the wet bulb temperature and dry bulb temperature, the condensation effect becomes worse, the cooling capacity decreases, the power consumpti...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a hot water cascade heating preparation system that realizes the deep recovery of cold storage condensation heat, reduces the temperature of the refrigerant to a lower level before entering the evaporative condenser, deeply recovers the condensation heat of the cold storage system, and solves the condensation heat of the cold storage system in the prior art Insufficient recovery, low energy efficiency of the system and high cost of hot water preparation

Images