Hybrid Solar Heat Generation Modelling and Cases: Preprint

Parthiv Kurup, Sertac Akar, Josh McTigue, Matt Boyd

Research output: Contribution to conferencePaper


Renewable thermal energy systems (RTES) harness renewable energy sources to provide services for space heating and cooling, district heating, domestic hot water, and industrial process heat (IPH). The use of low-pressure steam generated by the combustion of fossil fuels is common today to provide process heat for industrial facilities. Solar IPH (SIPH) technologies could economically replace the steam or heat needs at many industrial sites by providing high-temperature pressurized hot water, a heat transfer fluid (HTF) such as synthetic-oil, or direct steam (Kurup and Turchi, 2015). RTES could be hybridized with technology options or combined with the existing heat supply (e.g. fuels), to give options for targeted IPH application and the reduction of fuel consumption. This work has tested hybrid system modelling approaches. Initial results show when a natural gas (NG) burner that feeds an IPH application of 300°C, has both air and NG streams pre-heated with a solar field/RTES exit temperature of 180°C (via an HTF), a 13% NG offset is possible. NG offsets reach up to 26%, when the RTES exit temperatures are at 300°C for a given annual capacity factor of 24%. This can be even higher with addition of thermal energy storage (TES).
Original languageAmerican English
Number of pages15
StatePublished - 2021
EventEuroSun 2020 13th International Conference on Solar Energy for Buildings and Industry -
Duration: 1 Sep 20203 Sep 2020


ConferenceEuroSun 2020 13th International Conference on Solar Energy for Buildings and Industry

NREL Publication Number

  • NREL/CP-6A20-77759


  • hybrid system modeling
  • renewable thermal energy systems
  • solar industrial process heat
  • System Advisor Model (SAM)


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