Type
LTDH
Short description
LTDH Houses connected to existing DH with low temperature heating usage
Location
Sønderby
Country
Denmark
End users
75 existing detached houses with under-floor heating
Heat source
Existing DH
Description
Connected to existing DH, 3-pipe connection shunt-return water from main network as supply of LTDH but supply water from main network can be mixed to achieve higher temperatures); Substation connected to the main network via HEX (indirect connection)
Cooling
Missing info
Heat source-network connection
Shunt (3-pipe connection)
Booster HP or no for SH
No
Booster HP, IHEU or DHSU for DHW
IHEU (32.3 kW)
Category
3.1.2.2.1.
Tsource [°C]
80
Tsupply,min [°C] (network)
55
Tsupply,max [°C] (network)
55.1
Tsupply,min [°C] (at consumer substation)
53
Tsupply,max [°C] (at consumer substation)
53.2
Treturn [°C] (network)
40.2 (network); 37.9 (consumer substation)
Installed capacity [MW]
0.1454
Produced heating energy [MWh/year]
1602.8
Heating demand [MWh/year]
1383.45
Building heat demand kWh/m2/year
93.68
Network length [km] (if not specified-pipes, trench specified)
2743 (trench)
Heat loss [%]
13.8
Heat density=(delivered heat)/(covered area) [MWh/m2]
0.123 (calculated from data)
LHD (linear heat density)=(total heat demand)/(length of network) [kWh/m/year]
504.356 (calculated from data-trench length)
LHPDD (linear heating power demand density)=(installed thermal power capacity)/(network length(pipes)) [kW/m]
0.053 (calculated from data-trench length)
Reference 1
https://www.danskfjernvarme.dk/-/media/danskfjernvarme/gronenergi/projekter/eudp-lavtemperatur-fjv/guidelines-for-LTDH inal_rev1.pdf
Reference 2
http://celsiuscity.eu/wp-content/uploads/2019/11/H%C3%B8je-Taastrup.pdf
Reference 3
https://www.imp.gda.pl/ee_cities/prezentacje/drugi_C/1_Britta_Schmigotzki.pdf
Reference 4
https://backend.orbit.dtu.dk/ws/portalfiles/portal/142226895/Untitled.pdf
