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백이(Y Paek),조기현(K-H Cho),정형길(H-K Chung) 한국산업융합학회 2003 한국산업융합학회 논문집 Vol.6 No.2
This study was performed to find out drying characteristics and develop waste heat recovery dryer. this system was initiated in order to recover discharged waste heat of drying air from drying chamber in agricultural products dryer and recycle for additional heat source that could save drying cost. The system consists of drying chamber, fan, burner, circulation pump and heat exchanger made of fins and tubes. For the system performance, drying experiments with fresh pepper were conducted, and comparisons on fuel consumption amount and drying performance were made between conventional dryer and the heat recovery system attached dryer.
백이 ( Y Paek ),조기현 ( K-h Cho ) 한국산업융합학회 2005 한국산업융합학회 논문집 Vol.8 No.1
This study was performed to find out performance characteristics and develop LNG engine, this system was designed and manufactured by modification of a diesel using the LNgas. The engine was manufactured to be able to change the compression ratio by changing thickness of the gasket. The results are summarized brake power and torque of the engine increased when compression ratio of the engine increased. The engine output showed more power with gasoline by 5-10% then LNG under compression ratio of 9.5.and maximum brake thermal effeiency was noted when air-fuel ratio was 15.5. The concentrations of NOx, CO and HC in the exhaust gas showed lower values with the engine fueled LNG then gasoline.