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Conference papers
Modeling and Simulations of Solar Bidirectional Substation
Abstract : Decentralized surplus feed-in of solar heat into a District Heating Network (DHN) is here
addressed. The heat collected from solar panels located on rooftops of DHN connected buildings may either
be used locally for domestic hot water and space heating or fed into the DHN. Two-way substations able
to transfer heat from and into the network seem then to be required utilities. The present paper presents the
specifications (60kW capacity, return-to-supply connection) and promising architectures of such two-way
substation based on a previous analysis. A first-of-a-kind Modelica-based dynamic model of the substation
together with the consumer and the solar field connected to it is then detailed. Two-day simulations
considering real operating conditions of DHN were then performed. The results highlighted i) the good
match between the periods of solar heat reinjection with the periods of low supply temperature and
differential pressure and ii) the decisive benefit of the reinjection to increase the part of useful solar energy.
https://hal-cea.archives-ouvertes.fr/cea-03049293
Contributor : David Chèze <>
Submitted on : Thursday, December 10, 2020 - 4:49:37 PM
Last modification on : Friday, June 4, 2021 - 9:20:02 AM
Long-term archiving on: : Thursday, March 11, 2021 - 6:34:31 PM
Contributor : David Chèze <>
Submitted on : Thursday, December 10, 2020 - 4:49:37 PM
Last modification on : Friday, June 4, 2021 - 9:20:02 AM
Long-term archiving on: : Thursday, March 11, 2021 - 6:34:31 PM
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