Drainback solar thermal systems in Switzerland : market overview and main barriers

Eicher, Sara (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Bunea, Mircea (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Guillaume, Martin (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Bony, Jacques (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Citherlet, Stéphane (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland)

During the last years, solar thermal systems have lost in attractiveness mostly due to their high initial installation costs, higher complexity compared to photovoltaic systems and a regular need of maintenance to avoid overheating and freezing problems, e.g. control of glycol mixture properties. Drainback (DB) solar thermal systems may overcome some of these issues and contribute to the market recovery as it prevents overheating and freezing of the solar system components even when pure water is used as the heat carrier fluid. It also needs less components than classical pressurised systems, which leads to less complex, lower system costs. Nevertheless, this type of system has not been very successful in Switzerland, only accounting for a small part of the market. In order to identify the barriers preventing the wide Swiss acceptance of DB systems, a literature review was performed and an online survey conducted and addressed to the different actors of the solar thermal sector. The aim is to understand the reasons of low market penetration of DB systems in Switzerland and to clearly identify the main barriers to its spreading. Results show that investments in research, product development, technology demonstration and market deployment in the form of professional training and technology information are essential to promote the DB in Switzerland.


Keywords:
Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IGT - Institut de Génie Thermique
Publisher:
Rapperswil, Switzerland, 10-13 September 2018
Date:
2018-09
Rapperswil, Switzerland
10-13 September 2018
Pagination:
11 p.
Published in:
ISES Conference Proceedings, EuroSun 2018, 10-13 September 2018, Rapperswill, Switzerland
DOI:
ISBN:
978-3-9820408-0-6
Appears in Collection:



 Record created 2020-07-14, last modified 2020-07-20

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