냉매 R22, R134a를 적용한 해수냉각시스템의 성능 비교
Performance comparison of seawater cooling system using refrigerants R22 and R134a
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
지구온난화에 따른 해양환경의 변화로 어자원 확보를 위한 다양한 방안들이 강구되고 있다. 선망어선을 통한 어획물의운반시 선도유지를 위하여 기존에는 얼음과 소금을 어창에 공급하는 방식이 사용되고 있었다. 어획물의 선도향상을 위해 직접해수를 냉각해서 공급하는 선박용 해수냉각시스템 개발은 대단히 중요하다. 이러한 필요성을 바탕으로 만액식 증발기를 적용한 해수냉각시스템을 개발하고 있으며, 이에 대한 증발기 성능 특성을 냉매 R134a, R22를 적용하여 비교하였다. 먼저 시뮬레이션 프로그램인 HYSYS 프로그램을 이용하여 성능을 예측하였으며, 실험값과의 차이는 약 10% 정도로 일치하였다. R22, R134a 냉매 적용시 실험 및 HYSYS결과는 압축기 전후 압력, 냉매 순환량, 응축 및 증발 열량, 압축 동력, COP 등 대체적으로 같은경향을 나타냈다. 시스템 성능을 나타내는 지표인 COP는 냉매 R22 적용 시, 냉매 R134a 비해 약 22% 증가함을 보였다.
Abstract
Global warming is a limiting condition to the storage and maintenance of fish owing to the associated undesirable changes in the ocean environment such as the increase in seawater temperature. To address these limitations, there is a need to develop seawater cooling systems for ships. Based on this, a seawater cooling system with flooded-type evaporators was developed and its performance characteristics were compared with those of refrigerants R134a and R22. First, the performance was estimated using the simulation program HYSYS. The difference between the simulation results and the experimental values was less than 10%. When applying the R22 and R134a refrigerants, the experiment and HYSYS results showed the same tendency for most parameters such as the compressor pressure, amount of refrigerant converted, amount of condensation, heat capacity, compression power, and the coefficient of performance (COP), which is an indicator of system performance. The COP of R22 showed an increase of approximately 22% over that of R134a.
참고문헌 (12)
- I. G. Han, "Heat load characteristics of sea water cooling appratus on inshore fishing boat", Journal of the Korean Society of Marine Engineering, 25(6), pp.1317~1323 (2001)
- 윤정인, "열원수 온도에 따른 만액식 해수냉각시스템의 성능 비교", 동력시스템공학회지, 20(2), pp.91~96 (2016), 한국동력기계공학회[DOI]
- C. H. Son, "Experimental study on seawater cooling system of effects on heat source temperature", Proceeding of the 40th the Korean Society of Marine Engineering Spring Conference, pp.83~ (2016)
- C. H. Son, "Characteristics of refrigeration system for fishing-ships applying flooded evaporator", Proceedings of 2016 International Conference on Engineering, Technology, and Applied Science Spring Meeting (2016)
- E. Kolbe, "Refrigeration energy prediction for flooded tanks on fishing vessels", American Society of Agricultural Engineers, 6(5), pp.624~628 (1990)
- P. A. Perigreen, "Studies on preservation of fish in r frigerated sea-water", Central Institute od Fisherise Technology, 12(2), pp.105~111 (1975)
- S. G. Kim, "An Experimental Study of Heat Transfer Performance by Oil Concentration in a Flooded Evaporator", pp.2011
- S. Minetto, "An innovative system for feeding once-through evaporators in flooded conditions", Applied Thermal Engineering, 31, pp.370~375 (2011)[DOI]
- S. Minetto, "Experimental analysis of a new method for overfeeding multiple evaporators in refrigeration systems", International Journal of Refrigeration, 38(9), pp.1~9 (2014)[DOI]
- C. H. Son, "Characteristics of refrigeration system for fishing-ships applying flooded evaporator", Proceedings of 2016 ICETA Spring Meeting, pp.20~24 (2016)
- C. R. Kim, "Effects of Heat Source Temperature on Characteristics of Flooded Type Seawater Cooling System", pp.2016
- J. I. Yoon, "Heat transfer characteristics of flood-type evaporator using R22 and R134a for fishing vessels", Heat Transfer Engineering (2018)