Decin district heating

Case study Decin district heating
Description Decin, a city with around 55 000 inhabitants uses geothermal energy, special heat pumps and a CHP on natural gas. In the soil near Decin is an underground  water reservoir with a temperature of 30 °C. This water is used directly for a swimming pool. For district heating the temperature is too low. Therefore two heat pumps extract heat from it and warm the water for district heating up to 72 °C.
Region>City>location Decin
Owner MVV Energie CZ Co. (shareholder 96,90%)
Decin municipality (3,10%)
Operator TERMO Decin Co.
Installed capacity
( MWth)
Installed geothermal capacity
DH length
Inhabitants connected 4687 households,4 kindergartens, 2 elementary schools, 5 mediacla centers, 2 zdravotních středisek                               2 nursing homes
Design of the DH pre-isolated tubes DN 350 – 25
subsurface and surface
technical schemes
subsurface design without channels
significant pictures if any
 Operating Temperature of the DH 110/50°C
Temperature of the geothermal ressource
(production – injection)
Geothermal flow
max. 54l/s
Heat Pump
if any
(power in Mwe and COP)
2 units, each of them:
heating power: …..3 283 kWt
consumption:…..962 kWe
COP – 3,41
Production of heating and/or cooling heating-warming in Heat pump from 55 up to 72°C
Others uses
(drinking water, cascade uses…)
treated for drinking water
Dates of begining and end of construction Oct 2000/Oct 2002
Planing of the operation
(from pre-studies to full completion)
borehole for a heating plant in 1998, verification of the flow rate, temperature  (30°C) and pressure (0,35 MPa)
Organisational scheme _
Administration scheme _
Investement for
geothermal well
approx. 530 mil. CZK
Investement for
geothermal heating station
Investement for
DH network and substation
(banks, funds, PPP…)
MVV Energie CZ Co. capital, investment loan of 274 mil. CZK provided by HVB Bank Czech Republic and grant of the Kingdom of Denmark in the amount of 30 mil. CZK. State Environmental Fund of the Czech Republic contributed to partially cover the interests on the investment loan.
Amount of Subsidies
if any
30 mil. CZK
Difficulties faced aggradation of heat pump exchangers, treated water reveals high calcium amount
Administrative permits Water use permit
Cost of the produced MWh _
Cost of the MWh sold 607,41 CZK (VAT excluded)
Comparison with fossil energies more expensive and complicated operation
Final energy cost structure _
Taxes _
Pay back
Innovation if any regular heat pump repairing

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