Hengshui heating time in 2023

In 2023, the heating time in Hengshui will be from 1 15 in 2023 to 15 in March 2024.

According to the arrangement of the municipal government, combined with the weather conditions, the heating pipe network in the main urban area of Hengshui City began to operate with temperature from 20231October110, and the heat exchange stations started to supply heat in three batches, and the heating reached the standard in1October15. Geothermal district heating can also be called geothermal district central heating. The design parameters of primary network of central heating system in China are usually 130℃/70℃, and the design parameters of secondary network are different according to different terminal types.

With the continuous reduction of building energy consumption and the vigorous development of low-temperature heating technology, the design water supply temperature of secondary network is decreasing, even reaching below 40℃, so the irreversible loss of heating station will be greater. At this time, the absorption heat exchanger unit will be adopted to make full use of the heat exchange temperature difference between the primary and secondary networks, thus greatly improving the heating efficiency of the unit.

At the same time, absorption heat exchanger combined with low-temperature heating technology also provides powerful conditions for the utilization of renewable energy such as geothermal energy and solar energy. According to the data of northern Europe, Denmark and other countries, the return water temperature of low-temperature heating buildings can meet the demand of heating load in winter when it reaches about 20℃. At such a low hot water temperature, the COP of the absorption heat exchanger unit can be greatly improved, and it can absorb more renewable energy, such as low-grade geothermal energy.

Introduction of heating system forms:

Compared with decentralized electric refrigeration, centralized cooling by urban heating network in summer is inefficient and economical. Therefore, the utilization rate of urban heating network is very low in summer, and it is usually idle or only supplies domestic hot water to a small number of heat users. With the increase of fuel price, the cost of supplying domestic hot water for power plants in summer is getting higher and higher, which is basically at a loss, resulting in a high idle rate of heating network.

In the compound central heating system of urban heating network and geothermal energy, the absorption heat exchanger unit of heating station can be switched to refrigeration condition in summer, and used as absorption refrigerator, and the heat of the refrigerator can be completely or partially discharged to the ground heat exchanger to store the heat in the soil, thus saving the investment of the refrigerator and part of the cooling tower in summer and improving the economy of using the urban heating network for central cooling in summer.