Performances of a heat exchanger and pilot boiler for the development of a condensing gas boiler

Seungro Lee, Sung-Min Kum and Chang-Eon Lee

Energy, 2011, vol. 36, issue 7, 3945-3951

Abstract: In this research, design factors for a heat exchanger and boiler were investigated using a simplified model of a heat exchanger and pilot condensing boiler, respectively. Specifications of each heat exchanger component (e.g., upper heat exchanger (UHE) and lower heat exchanger (LHE); coil heat exchanger (CHE); baffles) were investigated using a model apparatus, and the comprehensive performance of the pilot gas boiler was examined experimentally. The heating efficiency of the boiler developed was about 90% when using the optimal designed heat exchangers. Compared to a conventional Bunsen-type boiler, the heating efficiency was improved about 10%. Additionally, NOx and CO emissions were about 30ppm and 160ppm, respectively, based on a 0% O2 basis at an equivalence ratio of 0.70, which is an appropriate operating condition. However, the pollutant emission of the boiler developed is satisfactory considering the emission performance of a condensing boiler, even though CO emission must be reduced.

Keywords: Condensing boiler; Heat exchanger; Pilot boiler; NOx and CO emissions (search for similar items in EconPapers)
Date: 2011
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (13)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:36:y:2011:i:7:p:3945-3951

DOI: 10.1016/j.energy.2011.05.018

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