Large temperature difference centralized heating/cooling system

Abstract

The invention discloses a large temperature difference centralized heating / cooling system. According to the large temperature difference centralized heating / cooling system, hot water output from a residual heat heating system can be divided into two ways: one way is connected with the cooling system through pipelines and the other way is connected with urban heat users through the pipelines; the cooling system is mixed with backwater of the heat supply users and then connected with heat users through the pipelines; the backwater of the heat supply users enters into an absorption heat pump in a heating system; the absorption heat pump is driven by steam or fuel gas to extract cooling circulating water residual heat; the residual heat is heated by a heater to the temperature of 130 DEG and heating water is discharged and enters into a next circulation. The large temperature difference centralized heating / cooling system has the benefits that as the back water of the system is recycled, the temperature of supply water / backwater reaches 130 / 30 DEG; as the temperature of the supply water / backwater is increased, the heat supply network delivery capacity is improved and the water pump power consumption in the system operation is reduced; moreover, an ammonium hydroxide absorption cooling unit can not only ensure cooling in winter, but also provide cold quantity for cold storages in spring, summer and autumn, power necessary for normal electric cooling is saved, the residual heat usage rate is improved and the energy conservation and emission reduction are facilitated.

Description

technical field [0001] The invention relates to a heat supply system utilizing industrial waste heat; in particular, it relates to a centralized heating / refrigeration system with large temperature difference. Background technique [0002] With the continuous development of urban scale, central heating in winter has become an inevitable trend. In the central heating system, the heat source of central heating is developing towards the reuse of industrial waste heat. Among them, the transmission capacity of the heat network is the heating process. The key is to increase the temperature difference between the supply and return water to increase the temperature difference between the supply and return water. When the temperature of the hot water delivered by the heating network is constant, lowering the return temperature of the heating water network can reduce the flow of hot water delivery and reduce the delivery rate. Reduce the initial investment of the pipeline and reduce th...

AI Technical Summary

Problems solved by technology

However, the volume and weight of the absorption heat exchange unit are huge, so it is not suitable to be installed in the thermal station of the residential area

Images