District heating substation

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]

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 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).

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:

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 Archived September 10, 2011, at the Wayback Machine, October 2008
  3. Presentation: GUIDELINES FOR DISTRICT HEATING SUBSTATIONS
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