Description
Part-load space heater efficiency requires the determination of five flue losses. These are latent heat loss (LL), on-period sensible heat loss (LS,ON), on-period infiltration loss (LI,ON), off-period sensible heat loss (LS,OFF) and off-period infiltration loss (LI,OFF).
We determined:
— Which of the part-load losses can be adequately measured using the current DOE procedure?
— Which part load losses cannot be measured using the DOE procedure?
— Seasonal efficiencies for three vented heaters using the current and a modified procedure.
All stack losses associated with the calculation of part-load utilization efficiency (nu) were reviewed in the development of a test method for heaters equipped with the thermally-activated vent damper. Annual fuel utilization efficiency and associated energy savings were determined for two thermal vent dampers tested with three types of gas-fueled heaters which operate in either the cycling mode or in the modulating fuel input mode.
Test results showed energy savings from 1 to 9% depending on the type of heater as well as the type of damper used.
Citation: Symposium, ASHRAE Transactions, Volume 87, Part 1, Chicago, Illinois
Product Details
- Published:
- 1981
- Number of Pages:
- 16
- File Size:
- 1 file , 1.4 MB
- Product Code(s):
- D-CH-81-09-1