Component Reliability Testing

Research output: NRELTechnical Report


Component and system reliability of active solar energy systems continues to be a major concern of designers, manufacturers, installers, and consumers. Six test loops were constructed at the Solar Energy Research Institute in Golden, Colorado, to thermally cycle active solar energy system components. Drain valves, check valves, air vents, vacuum breakers, tempering valves, and polybutylene pipewere included in the testing. Test results show poor reliability of some of the components and limited performance from others. The results lead to a better understanding of certain failures in the field and present designers with realistic expectations for these components.
Original languageAmerican English
Number of pages8
StatePublished - 1984

NREL Publication Number

  • NREL/TP-253-2299


  • active solar energy systems
  • component testing


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