Advanced Heat Transfer and Thermal Storage Fluids

Research output: Contribution to conferencePaper


The design of the next generation solar parabolic trough systems for power production will require the development of new thermal energy storage options with improved economics or operational characteristics. Current heat-transfer fluids such as VP-1?, which consists of a eutectic mixture of biphenyl and diphenyl oxide, allow a maximum operating temperature of ca. 300?C, a limit above which thevapor pressure would become too high and would require pressure-rated tanks. The use of VP-1? also suffers from a freezing point around 13?C that requires heating during cold periods. One of the goals for future trough systems is the use of heat-transfer fluids that can act as thermal storage media and that allow operating temperatures around 425?C combined with lower limits around 0?C. Thispaper presents an outline of our latest approach toward the development of such thermal storage fluids.
Original languageAmerican English
Number of pages5
StatePublished - 2005
Event2004 DOE Solar Energy Technologies Program Review Meeting - Denver, Colorado
Duration: 25 Oct 200428 Oct 2004


Conference2004 DOE Solar Energy Technologies Program Review Meeting
CityDenver, Colorado

Bibliographical note

Presented at the 2004 DOE Solar Energy Technologies Program Review Meeting, 25-28 October 2004, Denver, Colorado. Also included in the proceedings available on CD-ROM (DOE/GO-102005-2067; NREL/CD-520-37140)

NREL Publication Number

  • NREL/CP-510-37083


  • heat-transfer fluids
  • parabolic trough systems
  • PV
  • thermal energy storage


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