Heat transfer coefficients of the glass window with an interior high-reflectivity venetian blind

Conference · Thu Jul 01 04:00:00 EDT 1999

OSTI ID:20002454

Fang, X

The heat transfer coefficient (U-factor) of the glass window with an interior high-reflectivity venetian blind (long-wave reflectivity = 0.93) is studied. Two side-by-side test boxes are built in a room. The window systems tested are 100% glass area without frames, which are equivalent to the center-of-glass of common glass window. Two types of the window systems are tested which are the single glazing and the double glazing with an interior high-reflectivity venetian blind respectively. The effects of slat slope conditions on U-factors are also considered for each of them. The empirical equations of the center-of-glass U-factors are derived from the test data, and some corrections of the effects of window frames and ambient wind velocity are made thereafter. The corrected empirical equations can be easily used to estimate U-factors of the actual glass window with an interior high-reflectivity venetian blind.

• Research Organization: Nanjing Univ. of Aeronautics and Astronautics (CN)
• OSTI ID: 20002454
• Report Number(s): CONF-990805--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
GLASS
GLAZING MATERIALS
HEAT TRANSFER
REFLECTIVE COATINGS
SHUTTERS
U VALUES
WINDOWS