Heat exchange station setting principles
1. The overall plan should be used as the basis for the establishment of centralized heating exchange stations. The formulated plan should avoid duplication of construction and ensure that future development is closely integrated with current use. We will do a good job in macro control, make overall arrangements for construction projects, and achieve a unified layout.
2. The design of the heating station must take into account both the indoor heating system and the outdoor heating network. The pressure and design temperature should be consistent with the design requirements, and the thermal station equipment and systems as well as the outdoor heating network should match each other.
3. The heat exchange station should be set up in the central area where the heat load density is relatively high, and the load area should not cross the main streets as much as possible. Usually the heating radius should be less than 1000 m.
4. The scale of the heat exchange station should be determined through technical and economic considerations. In order to facilitate operation and management, the scale of the heat exchange station should be controlled within the range of supplying a load of 50,000 m2 to 200,000 m2.
Construction scale theory of heat exchange station
1. The overall plan should be used as the basis for the establishment of centralized heating exchange stations. The formulated plan should avoid duplication of construction and ensure that future development is closely integrated with current use. We will do a good job in macro control, make overall arrangements for construction projects, and achieve a unified layout.
2. The design of the heating station must take into account both the indoor heating system and the outdoor heating network. The pressure and design temperature should be consistent with the design requirements, and the thermal station equipment and systems as well as the outdoor heating network should match each other.
3. The heat exchange station should be set up in the central area where the heat load density is relatively high, and the load area should not cross the main streets as much as possible. Usually the heating radius should be less than 1000 m.
4. The scale of the heat exchange station should be determined through technical and economic considerations. In order to facilitate operation and management, the scale of the heat exchange station should be controlled within the range of supplying a load of 50,000 m2 to 200,000 m2.
Heat exchanger selection
When selecting heat exchangers, we need to select them according to different working requirements. For example, for different areas and management structures in operation, etc.
1. Heat exchange area of heat exchanger:
In the design process of the heat exchange area of the heat exchanger, it should be noted that in the calculation, different heat loads will have varying degrees of impact, which requires the design staff to conduct accurate data analysis. According to Selecting reasonable heat loads for different buildings and then carrying out calculation and design is also the basis for reducing heat exchanger calculation problems.
2. Operation and management of heat exchanger:
In the centralized format management of urban buildings, it is necessary to make certain selections for different heat exchange equipment. For equipment requirements encountered at the beginning of the design, reliable selection can be made based on the different needs of the system. Sexual analysis, which can effectively ensure the reasonable operation of the structure of the different forms of heat exchangers selected. In the investigation of setting faults, corresponding data analysis can also be carried out on the total load. Only by truly determining the reasonableness of its structure can we more effectively ensure that the various functions in the heating process can meet the heating needs of this community.
Select the running connection method
1. Direct connection of mixed water:
Commonly used mixed water forms for mixed water connections include water pump water supply pressurization, water pump return water pressurization and water pump bypass pressurization.
(1) For heat exchange of mixed water with pressurized water supplied by a water pump, a mixed water pump can be installed at the water supply of the secondary network. Under the action of the regulating valve, the return water from the primary network and the secondary network are mixed, and then pumped into the secondary network through the water pump, and then heat treated. This kind of system is suitable for use when the water pressure of the primary network and the secondary network are approximately the same, and the water supply pressure of the primary network is low.
(2) For heat exchange with mixed water that is pressurized by the return water of the water pump, a mixed water pump can be installed at the return pipe of the secondary network. When the water pump pressurizes the return water to the secondary network, the water that needs to be mixed and heat exchanged is mixed and heated with the water supply from the primary network under the adjustment of the bypass pipe valve. This method is suitable for use when the pressure of the primary network water supply is relatively high but the pressure of the secondary network return water is relatively low.
(3) For mixed water heat exchange in the form of water pump bypass pressurization, an electric regulating valve can be installed at the water supply position of the primary network, and a mixing pump can be installed at the mixed water bypass pipe. This type of installation method is suitable for medium and high pressure pipe sections. Suitable for primary network water supply.
