Comparison of short-term testing and long-term monitoring of solar domestic hot water systems

Download
  1. (PDF, 576 KB)
  2. Get@NRC: Comparison of short-term testing and long-term monitoring of solar domestic hot water systems (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1115/1.3268218
AuthorSearch for:
TypeArticle
Journal titleJournal of Solar Engineering
Volume109
Issue4
Pages274280; # of pages: 7
AbstractThis paper reports on the results of a comparison between short-term indoor testing and long-term outdoor monitoring of solar domestic hot water systems. Five solar-preheat systems were monitored under side-by-side conditions of irradiance and load, for a period of two years. The systems were then tested according to a standard day test, using a solar simulator, and a load schedule identical to that imposed on each system during the monitoring. The systems were found to deliver 19.7 MJ-25.8 mJ daily in the test, compared to a two-year average of 19.1 MJ-26.0 mJ (1.5 to 2.0 GJ/m2 annually) outdoors. System rank was reasonably well preserved. Comparison of results on the basis of efficiency and solar fraction suggests that good corespondence exists between long-term outdoor results and those of indoor testing, at least for systems with stable controllers. Selected systems were also tested at different load schedules and radiation levels. Methods of predicting the performance of a solar-preheat system from the results of a standard day test are discussed, and the possibility of reducing testing time to a single day is explored.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Chemical Process and Environmental Technology
Peer reviewedNo
NRC number49177
NPARC number8925799
Export citationExport as RIS
Report a correctionReport a correction
Record identifierdede3e4e-e1ca-49f1-b0e7-f31aae7c320c
Record created2009-04-23
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)