District heating substation

A district heating substation in a residential neighborhood with a thermal capacity of 300 kW. Two components of the heat meter are visible: the metering electronics unit on the right (white/blue box), and the ultrasonic flow meter in the center (bronze tube).

A district heating substation with a thermal capacity of 700 kW. This unit isolates the water circuit of the district heating system from the customer's central heating system.

A district heating substation is a component in a district heating system that connects the main network to a building's own heating system.^{[1] [2] [3]}

The station normally has one, or more of the following parts:

• Heat exchanger - to split primary and secondary side of the system
• Control valve - to regulate the flow through the heat exchanger
• Differential pressure controller - to balance the network and improve working conditions of control valve
• Strainer - to remove particles that could block heat exchanger or control valve
• Shut off valve - to stop the flow on primary side in case of service or emergency
• Heat meter - to measure energy consumption and allocate costs
• Temperature controller - to control temperature on secondary side by regulating the flow on primary side
• Temperature sensor - to sense flow and return temperatures required for temperature control

In addition, a district heating substation may also include:

• Pump
• Safety valve
• Manometer
• Non-return valve

References

1. http://www.ees.energy.lth.se/fileadmin/ees/Publikationer/1997/1012.pdf Janusz Wollerstrand: District Heating Substations
2. EUROHEAT & POWER: GUIDELINES FOR DISTRICT HEATING SUBSTATIONS, October 2008
3. Presentation: GUIDELINES FOR DISTRICT HEATING SUBSTATIONS