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An experimental study of the fuel savings obtainable with a residential, gas-fired, cast iron boiler operating with boiler pump overrun was conducted. A unique “thermostat”-controlled, fixed-load, steady-state cycling test procedure was employed. The seasonal fuel saving obtained with pump overrun, control setpoint of 95 F (35°C) outlet water temperature, was determined to be 9.7% . The associated seasonal energy cost saving was determined to be 7 .3%. The energy cost saving calculations were based on a 100 watt pump and a 3 to 1 electric/gas energy cost ratio. The data indicated that the savings are only slightly influenced by variations in the pump control setpoint over a 95-105 F (35-410C) range. The cycle per hour rate of the “thermostat” had little effect on the savings.
Citation: ASHRAE Transactions, 1986, vol. 92, pt. 1A, San Francisco
Product Details
- Published:
- 1986
- Number of Pages:
- 11
- File Size:
- 1 file , 3.5 MB
- Product Code(s):
- D-SF-86-2951
