| Title |
Heat Transfer Characteristics of Heat Exchange Module for a Water Tube Type Modular Boiler |
| Authors |
안준(Joon Ahn) ; 김종진(Jong Jin Kim) ; 강새별(Sae Byul Kang) |
| DOI |
http://dx.doi.org/10.6110 /KJACR.2012.24.3.265 |
| Keywords |
관군 ; 수관식 보일러 ; 열전달 Tube bank ; Water tube boiler ; Heat transfer |
| Abstract |
A finned tube type heat exchange module has been proposed for a multi-burner water tube boiler. Fin density and length increase in streamwise direction to equalize the evaporation for each module, which makes it difficult to apply conventional bulk design procedure. The design program has been improved by updating data for every row of tubes along the flow. A numerical simulation has been also conducted to evaluate the effect of inlet conditions and validated with experiment. The heat transfer of the first row has been underpredicted by the conventional Zhukauskas correlation, since the acceleration of the flow due to the blockage is not fully inflected. The fin tip temperature is also underpredicted by Bessel solution, because of the interaction with neighboring fins. |