Laboratory study of a low NO{sub x} hot water heater with a weak-swirl burner

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Due to environmental concerns and increasing regulation, manufacturers are searching for methods to reduce combustion-generated emissions from their products. Lean-burning is one recognized method for reducing NO{sub x} emissions from gas appliances. This paper describes the performance of a laboratory, low NO{sub x} hot water heater consisting of the premixed, lean-burning Weak-Swirl Burner (WSB) and a heat exchanger from a commercial 15 kW (50,000 Btu/h) Telstar spa heater. In order to identify an optimum design for a WSB water heater, data was gathered on the overall thermal efficiency and emission levels of NO, CO, and O{sub 2}, while varying the ... continued below

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6 p.

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Yegian, D.T. & Cheng, R.K. July 1, 1995.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 12 times . More information about this article can be viewed below.

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Description

Due to environmental concerns and increasing regulation, manufacturers are searching for methods to reduce combustion-generated emissions from their products. Lean-burning is one recognized method for reducing NO{sub x} emissions from gas appliances. This paper describes the performance of a laboratory, low NO{sub x} hot water heater consisting of the premixed, lean-burning Weak-Swirl Burner (WSB) and a heat exchanger from a commercial 15 kW (50,000 Btu/h) Telstar spa heater. In order to identify an optimum design for a WSB water heater, data was gathered on the overall thermal efficiency and emission levels of NO, CO, and O{sub 2}, while varying the equivalence ratio, water flow rates, and power inputs. Results of our testing show that the WSB/Telstar system achieved thermal efficiencies of 80% while producing ``ultra-low`` (<25 ppM) NO emissions for equivalence ratios below 0.85. Efficiency was essentially independent of equivalence ratio, as well as NO and CO emissions.

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6 p.

Notes

OSTI as DE96001113

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  • 1995 International mechanical engineering congress and exhibition, San Francisco, CA (United States), 12-17 Nov 1995

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  • Other: DE96001113
  • Report No.: LBL--37159
  • Report No.: CONF-951135--20
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 110777
  • Archival Resource Key: ark:/67531/metadc623849

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  • July 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • April 5, 2016, 10:15 a.m.

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Yegian, D.T. & Cheng, R.K. Laboratory study of a low NO{sub x} hot water heater with a weak-swirl burner, article, July 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc623849/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.