Life Cycle Assessment of heat transfer fluids in parabolic trough concentrating solar power technology Articles uri icon

publication date

  • November 2017

start page

  • 91

end page

  • 97

volume

  • 171

International Standard Serial Number (ISSN)

  • 0927-0248

Electronic International Standard Serial Number (EISSN)

  • 1879-3398

abstract

  • The majority of parabolic trough concentrating solar power plants consist of an indirect system where the heat transfer fluid (typically synthetic oil) exchanges energy with a
    secondary circuit which is connected to the power cycle. Synthetic oil has a technical limitation by the maximum operating temperature. This results in the search for new fluids.
    On the other hand, with the aim of having energy when there is no sun shining, it has increased the use of thermal storage. Thermal energy storage systems are composed of
    molten salts and presents higher operating temperatures than synthetic oil. Thus, direct systems, in which thermal storage and heat transfer fluid are unified and normally molten
    salts, emerge to improve the power cycle performance. To determine the future potential of direct systems, this paper evaluates the environmental damage of two types of
    molten salts and synthetic oil in order to decide whether the use of salts is better than synthetic oil, from an environmental point of view by using the Life Cycle Assessment (LCA)
    techniques. LCA results showed greater impacts in the syntheticoil case than the molten salts

keywords

  • csp; lca; molten salt; heat transfer fluid; sustainable development