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http://dx.doi.org/10.5762/KAIS.2014.15.7.4052

Heat Flow Analysis of Inner Groove Tube for Latent Heat Exchanger in Condensing Gas Boiler  

Yong, Kyeong-Jung (Department of Mechanical Engineering, Kongju National University)
Lim, Byung-Chul (Department of Mechanical Engineering, Kongju National University)
Park, Sang-Heup (Department of Mechanical & Automotive Engineering)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.7, 2014 , pp. 4052-4056 More about this Journal
Abstract
These days, household condensing gas boilers are an obligatory trend. The use of environmentally-friendly boilers that emit less pollutant, such as CO and NOx, are strongly recommended. In this paper, heat flow analysis of the additional inner groove in the tube of the secondary latent heat exchanger was studied to increase the efficiency. A 20% difference in the heat transfer area was obtained with the addition of an inner grove, which showed an increase in the amount of heat transferred. This was confirmed using three-dimensional numerical analysis. With the addition of an inner groove, the exit temperature increased by $1^{\circ}C$. This increase in exit temperature was considered to be a substantial increase in the efficiency of the condensing gas boiler.
Keywords
Condensing Gas Boiler; Latent Heat Exchanger; Inner Groove; Gas Boiler Efficiency; Heat Flow;
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