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Gas-Solid Heat Transfer Analysis of Bubbling Fluidized Bed at Bottom Ash Cooler
이규화,김동원,이종민,박경일,박병철,Gyu-Hwa, Lee,Dongwon, Kim,Jong-min, Lee,Kyoungil, Park,Byeongchul, Park Korea Electric Power Corporation 2022 KEPCO Journal on electric power and energy Vol.8 No.2
In this study we investigated the gas to solid heat transfer of bubbling fluidized bed bottom ash cooler installed at the Donghae power plant in South Korea. Several different analyses are done through 1-D calculations and 3-D CFD simulation to predict the bottom ash exit temperatures when it exits the ash cooler. Three different cases are set up to have consideration of unburnt carbon in the bottom ash. Sensible heat comparison and heat transfer calculation between the fluidization air and the bottom ash are conducted and 3-D CFD analysis is done on three cases. We have obtained the results that the bottom ash with unburnt carbon is exiting the ash cooler, exceeding the targeted temperature from both 1-D calculation and 3-D CFD simulation.