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U.S. Department of Energy
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Solar energy system performance evaluation: Billings Shipping, Billings, Montana, October 1979-April 1980

Technical Report ·
DOI:https://doi.org/10.2172/5110825· OSTI ID:5110825
The Billings Shipping site is an enclosed freight distribution facility with 4900 square feet of heated office space. The solar energy system consists of an array of 1968 square feet of flat-plate, liquid (glycol, 50/50 Dowtherm) collectors made by Lennox Industries. The collectors face 10 degrees east of south and solar energy is delivered to a 2500-gallon steel tank, buried five feet underground. Auxiliary energy is supplied by a gas-fired hot water boiler. The Billings Shipping solar energy system supplied 24% of the space heating requirements for this office building during the season of October 1979 through April 1980. The energy supplied (24%) is significantly lower than the estimated design contribution (54%) for the solar energy system, but is closer to the prediction of the f-Chart model (38%). The design goal appears to be obtainable only during the most temperate winter months.
Research Organization:
Automation Industries, Inc., Silver Spring, MD (USA). Vitro Labs. Div.
DOE Contract Number:
AC01-79CS30027
OSTI ID:
5110825
Report Number(s):
SOLAR/2066-80/14
Country of Publication:
United States
Language:
English