- Author
- Kweller, E. R.
- Title
- Laboratory Tests of a Gas Fueled Modulating Type Hot Water Boiler.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- Department of Energy, Washington, DC
- Report
- NBSIR 85-3142, April 1985,
- Distribution
- Available from National Technical Information Service
- Keywords
- boilers; hot water heating; space heaters; simulation; fuel consumption; gas furnaces; efficiency; tests; heat transfer
- Identifiers
- gas fired
- Abstract
- The objective of this study was to set up a modulating controlled hot water boiler in the laboratory and to simulate a variety of conditions that were cited by manufacturers of boilers as influencing and being distinct operating parameters for boilers. A further objective of these tests was to compare these responses of the fuel input rate with the mode of operation which was previously described for modulating controlled space heaters and furnaces. The variation of controlled fuel rate to the burner via the fuel modulating valve was measured under several controlled conditions. Effects of heating load, burner cycling rate and zone control, were investigated. The response of gas pressure modulation to the burner of a hot water boiler heating system was studied in several series of tests in the laboratory. A boiler load simulator was set up and used for these tests to control the heating load (heat transfer rate at the radiators) and to simulate a variety of operating conditions that would be expected to exist with a boiler installed in the home. The effects of heat transfer rate and boiler water operating temperature on the modulated gas pressure are presented as a series of data in charts showing controlled gas pressure versus time.