Heat Loss Testing of Schott's 2008 PTR70 Parabolic Trough Receiver

Research output: NRELTechnical Report


Two Schott 2008 model year PTR70 HCEs were tested on NREL's heat loss test stand from 100 - 500 deg C in 50 deg C increments. Absorber emittance was determined from the laboratory testing so that the performance of the HCEs could be modeled in a parabolic trough collector. Collector/HCE simulation results for many different field operation conditions were used to create heat loss correlationcoefficients for Excelergy and SAM. SAM estimates that the decreased emittance of the 2008 PTR70 will decrease the LCOE for parabolic trough power plants by 0.5 cents/kWh and increase the electricity generated by 5% relative to previous PTR70s. These conclusions assume that the 2008 PTR70 is supplied at the same cost and with the same optical performance as earlier PTR70 models.
Original languageAmerican English
Number of pages58
StatePublished - 2009

NREL Publication Number

  • NREL/TP-550-45633


  • concentric cylinders
  • HCE
  • heat collection element
  • heat losses
  • parabolic trough receivers
  • PTR70
  • Schott
  • thermal losses


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