Generation of a Parabolic Trough Collector Efficiency Curve from Separate Measurements of Outdoor Optical Efficiency and Indoor Receiver Heat Loss: Preprint

Research output: Contribution to conferencePaper

Abstract

The overall efficiency of a parabolic trough collector is a function of both the fraction of direct normal radiation absorbed by the receiver (the optical efficiency) and the heat lost to the environment when the receiver is at operating temperature. The overall efficiency can be determined by testing the collector under actual operating conditions or by separately measuring these two components.This paper describes how outdoor measurement of the optical efficiency is combined with laboratory measurements of receiver heat loss to obtain an overall efficiency curve. Further, it presents a new way to plot efficiency that is more robust over a range of receiver operating temperatures.
Original languageAmerican English
Number of pages10
StatePublished - 2010
EventSolarPACES 2010 - Perpignan, France
Duration: 21 Sep 201024 Sep 2010

Conference

ConferenceSolarPACES 2010
CityPerpignan, France
Period21/09/1024/09/10

NREL Publication Number

  • NREL/CP-5500-49304

Keywords

  • efficiency
  • heat losses
  • optical
  • parabolic trough

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