The performance of electric boiler using thick-film heater has been investigated experimentally. Electric boilers are using thick film heater is composed of four to a water chamber. In this study, the water flow rate while changing then umber of heaters and heating performance was evaluated. One water chamber, the average heat release is approximately 6.63kW. And average heat release of four water chamber is about 29.08kW. The energy efficiency of the water chamber 4 was 95.4%. Finally, the average heat release and energy-efficiency of electric boiler is increased with increasing water chamber number.

The main objective of this work is to perform experimental analyses of a absorption refrigeration system using a new refrigerant-sorbent pair as the working pair. The active component of sorbent is sodium thiocyanate (NaSCN). Ammonia (NH3) is chosen as refrigerant. As a result of these, it is concluded that the unit exhibits good cooling performance and the average cooling capacity is approximately 28.8kW and the average coefficient of performance (COP) of absorption system is 0.56. The unit is a thermal compressor which uses low-grade waste heat to generate refrigeration (cooling or freezing).

본 연구에서는 항만 구역의 지진피해예측 평가체계를 구축하기 위해 필요한 지진피해예측 관련 시스템 및 내진설계 현황 및 항만구조물의 지진피해 사례를 조사하였으며, 더불어 주요 항만 구역의 구조물의 현황 및 특성을 조사, 분석하였다. 이를 토대로 지반 정보와 항만 구조물의 지진 취약도를 고려한 항만 구역(구조물)의 지진피해예측 간이 평가방안을 개발하였다.

An experiment was carried out to evaluate the anchovy dryer performance using heat pump. We manufactured single stage refrigeration system using R22 and the dryer objects is frozen an anchovy. According to frame mobile method of the drying room inside divided at 3 drying rooms. After operating 13 hour machineries and accomplished a dryness experiment. The result which accomplishes an experiment, the dry condition which follows in frame movement of the drying room did not appear. According to the tray which is being put but in the frame the condition of anchovy dryness appeared different. It is concluded that the mean moisture evaporation rate is 60.7%, and the mean production of dryer an anchovy is 1.62 ton/day per dryer room.

A new plate heat exchanger for water-refrigeration systems such as chillers has been developed. Before forming, two stainless steel plates are placed on each other and connected by tig welding. To outline of the plate did the seam welding, in order to form the flow pass on the plate inside the spot welding used. After the plates have been welded, the plates are hydraulically inflated using pressure by water or nitrogen.The plate is made of an SUS plate of 1m×2m in length and 1.2mm in thickness and are fixed in the top of the water tank.As a result of these, it is concluded that the plate exhibits good cooling performance and the average cooling capacity is approximately 2.9RT/plate and the average coefficient of performance (COP) of chiller system is 3.16.