rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Diagnosis of solar water heaters using solar storage tank surface temperature data
    sub title: preprint
  name:
    name part: Burch, J.
  name:
    name part: National Renewable Energy Laboratory (U.S.)
  type of resource: text
  genre: technical report
  origin info:
    place:
      place term: cou
    date issued: 2009
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
    extent: 1 online resource (8 pages) : illustrations
  abstract: Based on the tank energy balance, net gain into the solar storage tank can be inferred from the time derivative of the average tank temperature. Using temperature at the tank wall under insulation as a surrogate for fluid temperature, sensor mounting is simple and the inferred gains are useful for solar water heater (SWH) diagnostics. Positive daytime gain is compared to solar gain computed from site-specific parameters for an assumed clear day. The solar storage tank loss coefficient is inferred from temperature decay at night and is compared to the value computed from tank description. Larger draws are evident as sharp drops in storage temperature. Analyses are embodied in a tool validated against directly measured gains. Inoperative single-family SWHs are easily detected, signaling the need for repair. Detection of system control issues and shading are exemplified. In large multi-family systems, frequent day-time draws will bias the comparison to expected solar gain.
  note: J. Burch [and others].
  note: Title from title screen (NREL, viewed June 25, 2009).
  note: "April 2009."
  note: "To be presented at the American Solar Energy Society (ASES) 2009 National Solar Conference (SOLAR 2009), Buffalo, New York, May 11-16, 2009."
  note: Electronic resource.
  subject:
    topic: Solar water heaters
    topic: Research
  classification: E 9.17:NREL/CP-550-45465
  related item:
    title info:
      title: Conference paper (National Renewable Energy Laboratory (U.S.)) ; 550-45465
  identifier: https://purl.fdlp.gov/GPO/LPS116019
  record info:
    record content source: SOE
    record creation date: 090625
    record change date: 20211202192338.0
    record identifier: in00002518998