Side by side tests of two SDHW systems with solar collectors with and without antireflection treatment

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Abstract

Two low flow SDHW systems based on mantle tanks are tested side by side in a laboratory test facility for solar heating systems under the same weather and operation conditions. The systems are identical with the exception that one system is equipped with a solar collector with antireflection treated glass while the other system has a collector with a normal glass. Measurements of the thermal performance of the two systems have been carried out for a long measuring period. The thermal performances of the systems have also been calculated with a detailed simulation model. There is a good agreement between measured and calculated thermal performances for both systems. The extra thermal performance of the system with the solar collector with the anti reflection treated glass cover is a strong function of the solar fraction. In sunny periods with high solar fractions the percentage extra thermal performance gained by the antireflection treatment is low. In less sunny periods with low solar fractions the percentage extra thermal performance of the system with the antireflection treated cover glass is high, typically up to 8%.
Original languageEnglish
JournalEnergy Procedia
Volume70
Pages (from-to)462-469
Number of pages8
ISSN1876-6102
DOIs
Publication statusPublished - 2015
Event3rd International Conference on Solar Heating and Cooling for Buildings and Industry - China National Convention Center, Beijing, China
Duration: 13 Oct 201415 Oct 2014
Conference number: 3
http://www.shc2014.org/cms/home.html

Conference

Conference3rd International Conference on Solar Heating and Cooling for Buildings and Industry
Number3
LocationChina National Convention Center
CountryChina
CityBeijing
Period13/10/201415/10/2014
Internet address

Bibliographical note

This is an open access article under the CC BY-NC-ND license

Keywords

  • Anti-reflection glass
  • SDHW system
  • Side by side laboratory test
  • Mantle tank
  • Simulation

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