Stability characteristics and emission levels of a laboratory hot water heater utilizing a weak-swirl burner
This paper reports the test results of a collaboration between Lawrence Berkeley National Laboratory and Teledyne Laars to assess the viability of incorporating the Weak-Swirl Burner (WSB) into a 15 kW Telstar spa heater. By stabilizing premixed lean combustion down to equivalence ratios {phi} {approx} 0.6, the WSB greatly reduces NO{sub x} levels by minimizing thermally generated NO{sub x} through the Zeldovich mechanism. The first set of experiments focus on establishing the WSB`s minimum and maximum swirl requirement) for varying {phi}, power levels, burner size, and enclosure. The second set of experiments evaluates the performance of a laboratory water heater where the WSB is incorporated into a Telstar heat exchanger. It was found that the laboratory test station achieves ``low`` and ``ultra-low`` NO{sub x} emissions without compromising the thermal efficiency. The optimum operating condition is for {phi} = 0.8 at 18 kW where NO{sub x} < 25 ppM and CO < 50 ppM. The results will be used as design guideline for using the low emission WSB in a prototype.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 199209
- Report Number(s):
- LBL-37820; CONF-9510294-1; ON: DE96004724
- Resource Relation:
- Conference: American Flame Research Council fall international symposium, Monterey, CA (United States), 15-18 Oct 1995; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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