SDH calculation tools

In this section, you can find evaluation and calculation tools dedicated to solar district heating allowing opportunity and feasibility studies. More detailed information about the tools can be found in the SDH guidelines (2.6).




Tool for a first approach of sizing and economical balance. It is based ont the estimations described in the SDH guidelines (2.3).


Fjernsol II

Fjernsol II calculates the energy output from
a solar collector field installed in an existing
district heating network. It also provides the
price of the produced solar heat which can
be compared with the heat price from
alternative heat sources. Solar production
is estimated monthly. It is developed for typical Danish conditions.

download (only in Danish)








SDH Online Calculation Tool

The SDH Online Calculation Tool is based on TRNSYS simulation results and is a really user-friendly first approach tool to get a first idea of dimensioning and economics of a solar district heating plant. The tool is available for central solar district heating plants and distributed solar district heating plants (decentral feed-in).


ScenoCalc Fernwärme

ScenoCalc Ferwärme is a free Excel based tool for calculation of the yield of solar thermal plants feeding into district heating networks. It is based on the international solar keymark standard calculation tool ScenoCalc.

download on the website (only German)


Sunstore 4 Feasibility Evaluation Tool

SUNSTORE-4 is a tool for a first approach of sizing and feasibility evaluations of large scale SDH plants. There is a possibility to compare up to 5 different hybrid system concepts, including large scale solar heating system, seasonal or short term energy storage, biomass boiler system, heat pump and even ORC for electricity. The results give the investment cost and the resulting heat price with the selected hybrid concepts.

download on the Sunstore 4 website


Participate in the upcoming SDH events
Participate in the upcoming SDH events

 Thanks for your participation in the 5th International Solar District Heating Conference  in Graz, Austria!

See our event calender for other upcoming events

NEW Brochure and Project Leaflets
NEW Brochure and Project Leaflets
European Large Scale Solar Heating Plant Database
European Large Scale Solar Heating Plant Database
Download all SDH guidelines in one file
Download all SDH guidelines in one file
Find professionals
Find professionals
Click here to find business partners, component suppliers, consultants and service providers with long term experience on the field of solar district heating!
SDH related projects
SDH related projects

Discover other european RTD and policy projects related to solar district heating:

click here