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성규식(Gyu-Sik Sung),황은빛(Eunbit Hwang),박주헌(Juheon Park),최종성(Jongseong Choi),신기열(Ki-Yeol Shin),배상수(Sang-Su Bae),조경철(Kyung-Chul Cho),권오대(Oh-Dae Kwon) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
In this study, optimum capacity design of heat exchangers in a waste heat recovery system(WHRS) that recovers a large amount of heat energy from high-temperature exhaust gas which was supplied from a power generation gas engine using biogas produced from organic waste in an industrial complex were performed. The type and size of waste heat recovery system components suitable for engine power capacity according to biogas production volume were designed, and energy recovery efficiency was analyzed. The waste heat recovery system consists of a smoke tube boiler that produces 5 bar pressure and 161°C superheated steam from exhaust gas as heat source, and two economizers that produce preheating of supply water and hot water. Two different gas engine capacities as 100kW and 250kW were analyzed to product a target amount of superheated steam and hot water to maximize efficiency of waste heat recovery system. From the result of heat exchanger performance analysis, the optimum value of heat exchanger capacity ratio was founded as similar range as 0.43 ~ 0.46 even two different capacity of engines.