Dynamic Solar Heat Gain Coefficient: Experimental evaluation of the opaque portion of a curtain wall system

Vidar Lerum

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The Solar Heat Gain Coefficient (SHGC) of the opaque portion of a curtain wall system has been determined experimentally. The curtain wall system under investigation consists of wall panels with structural exterior glazing. A 5-inch thick drywall was built in place. This steel stud wall, insulated with fiberglass and sheeted with gypsum board, is backed up against the shadow box of the curtain wall panel, see Fig. 1. The examined building is located on a university campus in the arid climate of the Northern edge of the Sonoran desert. A monitoring system was set up to measure temperatures, solar radiation, and heat flux data. The data show that the temperature in the sealed air cavity of the curtain wall section (the shadow box) peaked above 200 °F. The air temperature in the shadow box frequently reached 95 °F above the interior wall surface when the wall was exposed to solar radiation. The SHGC calculated from the acquired data was significantly higher than the SHGC used in a computer simulation performed during the design phase. It was also found that the SHGC fluctuates with the temperature elevation in the shadow box. This phenomenon is characterized as a dynamic solar heat gain coefficient.

Original languageEnglish (US)
Title of host publicationAmerican Solar Energy Society - Solar 2006
Subtitle of host publication35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference
Pages670-675
Number of pages6
StatePublished - Dec 1 2006
EventSolar 2006: Renewable Energy - Key to Climate Recovery, Including 35th ASES Annual Conference, 31st ASES National Passive Solar Conference, 1st ASES Policy and Marketing Conference and ASME Solar Energy Division International Solar Energy Conference - Denver, CO, United States
Duration: Jul 9 2006Jul 13 2006

Publication series

NameAmerican Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference
Volume2

Other

OtherSolar 2006: Renewable Energy - Key to Climate Recovery, Including 35th ASES Annual Conference, 31st ASES National Passive Solar Conference, 1st ASES Policy and Marketing Conference and ASME Solar Energy Division International Solar Energy Conference
CountryUnited States
CityDenver, CO
Period7/9/067/13/06

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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