for one-family houses
One-family house application includes domestic hot water (DHW) and heating applications connected to a district heating network with a supply temperature of 90°C and pressure level of PN16. The supply temperature normally range from 55°C to 90°C and the designed pressure level can be PN10 or PN16.
A one-family substation is a subscription interface to the district heating network. The substation will acquire the heat required from the district heating network, either by direct flow into the building heating system or by extracting the demanded heat, no more ad no less, from the district heating network by means of a heat exchanger. The substation will adjust the temperatures of the water flow in the building heating installation according to the need of the building using the control valves.The one-family house substations can firstly be categorised according to their space heating connection and secondly the DHW preparation method. The space heating connection can be either direct or indirect. Were in the direct connection the district heating water flows through the space heating installation and in the indirect connection the district heating water is separated from the space heating installation water by a heat exchanger. Further, on the direct connection can be divided into two methods, uncontrolled and a mixing loop application.
There are generally three DHW applications available:
The design of the secondary heating system, the heat exchanger, and the control equipment on the primary DH network supply side are directly related to the successful operation of district heating substations.The variations in consumption from hour to hour and day to day cause the differential pressure to fluctuate markedly as the flow varies in the primary supply. This affects control of the supply to the substation in the building.
When connecting a building to district heating, many options are available for heating the building and for the preparation of domestic hot water, and with each application there are specific benefits and limitations.
The best solution comes from matching the system infrastructure and design with the available supply of energy sources, building type and individual needs.
How can we help You?