Design of consumer thermal substations for the integration of distributed solar technologies in District Heating systems

PART OF RELaTED PROJECT

Victor Sanchez and Roberto Garay, of Tecnalia, will present a new consumer substation on the 5th International Solar District Heating Conference.

Victor Sanchez and Roberto Garay of Tecnalia, presented a new consumer substation at the 5th International Solar District Heating Conference. This concept of substation for the connection of Solar Thermal into District Heating networks, will be developed within RELaTED project.

Find more information on this paper (download at this link), or read the abstract below.

In most cases, building service designers choose between Solar thermal (ST) and District Heating (DH) technologies for their integration in buildings. By doing so, only a fraction of the buildings within a particular district is used for ST, while at the same time energy intensity in DH networks can be reduced. In some cases, building-integrated solar thermal systems are connected to DH networks by means of dedicated pipes. In all these cases, sub-optimal situations are reached with lower fraction of renewable heat, reduced network strength and/or additional heat losses.

In this paper, a consummer substation concept is proposed with reversible heat flow and net metering, which avoids local thermal storage in the solar loop. Adaptations required for multi-dwelling buildings are presented

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Substation with indirect preparation of DHW, and compatible DHW storage tank (Source: METRO THERM).


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DESIGN OF CONSUMMER THERMAL SUBSTATIONS FOR THE INTEGRATION OF DISTRIBUTED SOLAR TECHNOLOGIES IN DISTRICT HEATING SYSTEMS

SANCHEZ_SDHGRAZ_SUBSTATIONS_Paper_20180205-1.pdf