Measurement of Single and Double Glazing Thermal Performance under Realistic Conditions Using The Mobile Window Thermal Test (MoWITT) Facility
Title | Measurement of Single and Double Glazing Thermal Performance under Realistic Conditions Using The Mobile Window Thermal Test (MoWITT) Facility |
Publication Type | Conference Paper |
Year of Publication | 1986 |
Authors | Joseph H Klems, H. Keller |
Conference Name | 1987 ASME Solar Energy Division Conference |
Date Published | 03/1987 |
Conference Location | Honolulu, HI |
Call Number | LBL-22149 |
Abstract | The thermal performance of single glazing, clear double glazing, and double glazing with a low-emissivity coating was measured in both south-facing and north-facing orientations under realistic field conditions using the new MoWiTT field test facility. The time-dependent net heat flow through each fenestration was found to be consistent with the predictions of the standard simplified heat transfer model, provided that an angle-dependent shading coefficient is used and diffuse solar gain is included in the calculation. Summer-condition average U-values were derived for each glazing type and were found to agree with the expected values for both types of double glazing. The measured U-value for single glazing was lower than predicted. |
LBNL Report Number | LBL-22149 |