#NOVAN SOLAR HOT WATER PANELS SERIES#

Appended are a system description, performance evaluation techniques and equations, site history, long-term weather data, sensor technology, and typical monthly data. The performance of the collector, storage, domestic hot water and space heating subsystems, the operating energy, energy savings, and weather conditions are also evaluated. Insolation, solar energy utilization and operation data are also given. Performance data are given for the system including the solar fraction, solar savings ratio, conventional fuel savings, system performance factor and solar system coefficient moreР’В Р’В» of performance. The system is equipped with 8034 square feet of flat plate collectors, 4017 cubic feet of rock bin sensible heat storage, and auxiliary equipment including 8 heat pumps, 6 of which are solar supplied and instrumented, air conditioning units, and natural-gas-fired boilers. Its active solar energy system is designed to supply 57% of the space heating and 50% of the hot water demand. Spearfish High School in South Dakota contains 43,000 square feet of conditioned space. However, the system solar fraction was slightly better than the design estimate of 53%. The measured system load was four times smaller than the design load, and solar energy used was three and one-hale times smaller. Solar energy supplied 9.16 million Btu to a load of 14.9 million Btu. The solar energy system was operational during the entire reporting period, October 1982 through September 1983.

#NOVAN SOLAR HOT WATER PANELS SERIES#

This report is the second in a series of performance evaluation reports on the Williamson Home. The hot water subsystem consists of a pickoff-type air-to-water heat exchanger, circulating pump, and a 100-gallon gas-fired hot water tank. Solar storage is provided by a 240-cubic-foot bin filled with two-inch to moreР’В Р’В» three-inch diameter rocks. The gross collector area of each panel is 50.1 inches x 97.4 inches for a total gross area of 339 square feet. The active solar energy system has an array of ten flat-plate collectors which use air as the collector medium. The solar energy system is designed to supply approximately 53% of the space heating and DHW energy requirements for the house. The Williamson Home, located in Ipswich, Massachusetts is a 1568-square-foot single family residence using solar energy to heat Domestic Hot Water (DHW) and provide space heating. Also graphed are the system operating sequence and the solar energy utilization and energy losses. System operation is illustrated by graphs of collector array inlet/outlet temperatures and ambient temperature and typical building loop temperatures vs time for a typical day. Also provided are graphs of collector array efficiency vs the difference between the fluid inlet temperature and ambient temperature divided by insolation. Also tabulated monthly are weather conditions, energy savings, operating energy, and coefficients of performance. Monthly performance data are tabulated for the overall system moreР’В Р’В» and for each type of collector, storage, domestic hot water, and space heating subsystems. Storage is in two 15,000-gallon storage tanks, and auxiliary heating is by electric resistance strip heaters. The system is equipped with 15,389 square feet of one type of flat-plate collector panels and 6650 square feet of another type. The solar energy system was designed to supply 64% of the space heating and 88% of the hot water. The Wood Road School Solar Project of the Ballston Spa Central School District is a 216,000 square foot (136,510 square feet of solar conditioned space) combined elementary and middle school located in New York.

Novan solar hot water panels