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Abstract
Study on the Heating Performance Characteristics of Plate Heat Exchangers with Operation and Geometric Parameters
JaeMyeong, Jeon
A plate heat exchanger has high efficiency, simple structure, and easy maintenance. These advantages led to increase the use of the heat exchangers in many applications such as district heating and cooling system, heat interchanger, boost heat exchanger, power plant, and so on. The prevalence of the heat exchanger has attracted many interests from researchers. Even though studies on the plate heat exchangers have been performed, the effects of the operation and geometric parameters on the heating performance of plate heat exchangers are very limited in the open literature. In addition, the lack of information on operation and maintenance has caused fouling problems. Fouling should be managed by proper cleaning methods since it degrades the performance of heat exchangers. In this study, the effects of the geometric and operation parameters on the heat transfer and pressure drop characteristics were investigated experimentally by varying the chevron angle, hot and cold side flow rate, and inlet temperature. In addition, the formation of fouling with calcium carbonate (CaCO3) was observed to investigate the fouling resistance in plate heat exchangers for heating.
Chevron angle 60°/60° represented the highest pressure drop and heat transfer coefficient. The heat transfer performance improved with increasing the hot side flow rate and inlet temperature. Empirical correlations were proposed based on the performance characteristics. In addition, the results showed fouling was likely to be formed with the decrease in the flow rate and temperature, and the increase in the chevron angle.
Study on the Heating Performance Characteristics of Plate Heat Exchangers with Operation and Geometric Parameters
JaeMyeong, Jeon
A plate heat exchanger has high efficiency, simple structure, and easy maintenance. These advantages led to increase the use of the heat exchangers in many applications such as district heating and cooling system, heat interchanger, boost heat exchanger, power plant, and so on. The prevalence of the heat exchanger has attracted many interests from researchers. Even though studies on the plate heat exchangers have been performed, the effects of the operation and geometric parameters on the heating performance of plate heat exchangers are very limited in the open literature. In addition, the lack of information on operation and maintenance has caused fouling problems. Fouling should be managed by proper cleaning methods since it degrades the performance of heat exchangers. In this study, the effects of the geometric and operation parameters on the heat transfer and pressure drop characteristics were investigated experimentally by varying the chevron angle, hot and cold side flow rate, and inlet temperature. In addition, the formation of fouling with calcium carbonate (CaCO3) was observed to investigate the fouling resistance in plate heat exchangers for heating.
Chevron angle 60°/60° represented the highest pressure drop and heat transfer coefficient. The heat transfer performance improved with increasing the hot side flow rate and inlet temperature. Empirical correlations were proposed based on the performance characteristics. In addition, the results showed fouling was likely to be formed with the decrease in the flow rate and temperature, and the increase in the chevron angle.
목차
ContentsAbstract iList of Figures vList of Tables viiNomenclature viii제 1 장 서론 11.1 연구배경 11.2 연구동향 51.3 연구목적 및 내용 13제 2 장 실험장치 및 실험방법 162.1 실험장치 및 계측장치 162.2 실험조건 282.3 실험방법 292.4 실험 데이터 처리 31제 3 장 판형열교환기 난방 성능에 관한 연구 353.1 형상변수에 따른 성능 특성 353.2 운전변수에 따른 성능 특성 393.3 상관식 개발 및 검증 45제 4 장 탄산칼슘(CaCO3) 파울링에 따른 성능 변화 564.1 농도변화에 따른 파울링 형성 특성 564.2 유속변화에 따른 파울링 형성 특성 594.3 형상변수에 따른 파울링 형성 특성 62제 5 장 결론 65참고문헌 68
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