The research aimed to develop a high-efficiency plate-type heat exchanger for exhaust gas using computational fluid dynamics (CFD) thermal analysis based on the plate shape, and to identify the optimal shape. Following this, a water/air plate heat exchanger was manufactured, and its characteristics were studied experimentally. As the Re number increases on the gas (or air) side, the heat transfer rate increases significantly, whereas an increase in the Re number on the water side leads to a smaller increase in heat transfer. This is attributed to the larger convective heat resistance on the gas side, causing a substantial reduction in gas-side heat resistance as gas velocity increases, resulting in a considerable overall reduction in heat resistance. The fluid flow pressure drop showed similar results between the CFD calculations and experimental outcomes.

경기만 염습지의 식물상을 1999년 8월부터 2001년 10월까지 조사하였다. 본 조사는 경기만에 위치한 14개 내륙연안과 도서지역의 38개 지역에서 자연염습지, 사구, 폐염전 및 해안제방을 구분하여 수행되었다. 이 지역에서 조사된 염생식물은 17과 32속 46종이었는데, 이중 자연염습지에만 자라는 식물은 지채 (Triglochin mariti-mum L.), 천일사초 (Carex scabrifolia Steud.), 퉁퉁마디(Salicornia her