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Parabolic trough plant performance in China with focus on comparison of heat transfer fluids HELISOL®5A and Therminol® VP-1

: Zoschke, T.; Rohani, S.; Fluri, T.; Hu, Q.; Fang, Q.


Mancilla, Rodrigo (Ed.) ; American Institute of Physics -AIP-, New York:
23rd SolarPACES 2017, International Conference on Concentrating Solar Power and Chemical Energy Systems. Proceedings : 26-29 September 2017, Santiago, Chile
Woodbury, N.Y.: AIP, 2018 (AIP Conference Proceedings 2033)
ISBN: 978-0-7354-1757-1
Art. 130017, 8 pp.
International Conference on Concentrating Solar Power and Chemical Energy Systems (SolarPACES) <23, 2017, Santiago>
Conference Paper
Fraunhofer ISE ()

The heat transfer fluid HELISOL® 5A is particular interesting for the Chinese CSP market due to its low freezing point. In this paper the plant performance of a system operated with HELISOL® 5A was compared to a system operated with Therminol® VP-1 with the help of system simulation. Firstly, the simulation model was validated with measured data from the HELISOL® 5A test loop of Royal Tech in Inner Mongolia. Secondly the plant performance was assessed for a reference plant in China and South Africa. The simulation results showed a higher annual yield for the HELISOL® 5A system, mainly due to the increase in power block efficiency because of the higher temperature level. Furthermore a sensitivity analysis on the effect of hydrogen formation was carried out for both heat transfer fluids. It showed that the yield curve of HELISOL® 5A lied above the curve of Therminol® VP-1 for all hydrogen percentages. As hydrogen formation is expected to be much lower for HELISOL® 5A the benefit will especially show in long-term operation.