Thermal Advantages for Solar Heating Systems with a Glass Cover with Antireflection Surfaces

Simon Furbo, Louise Jivan Shah

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Investigations elucidate how a glass cover with antireflection surfaces can improve the efficiency of a solar collector and the thermal performance of solar heating systems. The transmittances for two glass covers for a flat-plate solar collector were measured for different incidence angles. The two glasses are identical, except for the fact that one of them is equipped with antireflection surfaces by the company SunArc A/ S. The transmittance was increased by 5–9%-points due to the antireflection surfaces. The increase depends on the incidence angle. The efficiency at incidence angles of 08 and the incidence angle modifier were measured for a flat-plate solar collector with the two cover plates. The collector efficiency was increased by 4–6%-points due to the antireflection surfaces, depending on the incidence angle. The thermal advantage with using a glass cover with antireflection surfaces was determined for different solar heating systems. Three systems were investigated: solar domestic hot water systems, solar heating systems for combined space heating demand and domestic hot water supply, and large solar heating plants. The yearly thermal performance of the systems was calculated by detailed simulation models with collectors with a normal glass cover and with a glass cover with antireflection surfaces. The calculations were carried out for different solar fractions and temperature levels of the solar heating systems. These parameters influence greatly the thermal performance associated with the antireflection surfaces.
Original languageEnglish
JournalSolar Energy
Volume74
Issue number6
Pages (from-to)513-523
ISSN0038-092X
DOIs
Publication statusPublished - 2003

Fingerprint Dive into the research topics of 'Thermal Advantages for Solar Heating Systems with a Glass Cover with Antireflection Surfaces'. Together they form a unique fingerprint.

Cite this