| Title |
Recent Progress in Air Conditioning and Refrigeration Research:A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2007 |
| Authors |
한화택(Hwataik Han) ; 신동신(Dong Sin Shin) ; 최창호(Chang-Ho Choi) ; 이대영(Dae-Young Lee) ; 김서영(Seo Young Kim) ; 권용일(Yong-Il Kwon) |
| Keywords |
공기조화 ; 냉동 ; 유체유동 ; 열전달 ; 건축설비 ; 건축환경 ; 유체기계 ; 배관 ; 열교환기 ; 제습 ; 히트파이프 ; 상변화 ; 압축기 ; 대체냉매 ; 난방 ; 환기 ; 실내공기질 ; 온열쾌적성 ; 부하계산 Air conditioning ; Refrigeration ; Fluid flow ; Heat transfer ; Building facility ; Indoor environment ; Fluid machinery ; Piping ; Heat exchanger ; Dehumidification ; Heat pipe ; Phase change ; Compressor ; Alternative refrigerants ; Heating ; Ventilation ; Indoor air quality ; Thermal comfort ; Load analysis |
| Abstract |
The papers published in the Korean Journal of Air-Conditioning and Refrigeration Engineering during the year of 2007 have been reviewed. Focus has been put on current status of research in the aspect of heating, cooling, ventilation, sanitation and building environments. The conclusions are as follows. (1) The research trends of fluid engineering have been surveyed as groups of general fluid flow, fluid machinery and piping, etc. New research topics include micro nano fluid, micro- pump and fuel cell. Traditional CFD was still popular and widely used in research and development. Studies about fans and pumps were performed in the field of fluid machinery. Characteristics of flow and fin shape optimization are studied in the field of piping system. (2) The research works on heat transfer have been reviewed in the field of heat transfer characteristics, heat exchangers, and desiccant cooling systems. The research on heat transfer characteristics includes thermal transport in pulse tubes, high temperature superconductors, ground heat exchangers, fuel cell stacks and ice slurry systems. For the heat exchangers, the research on pin-tube heat exchanger, plate heat exchanger, condensers and gas coolers has been cordially implemented. The research works on heat transfer augmenting tubes have been also reported. For the desiccant cooling systems, the studies on the design and operating conditions for desiccant rotors as well as performance index are noticeable. (3) In the field of refrigeration, many papers were presented on the air conditioning system using CO2 as a refrigerant. The issues on the two-stage compression, the oil selection, and the appropriate oil charge were treated. The subjects of alternative refrigerants were also studied steadily. Hydrocarbons, DME and their mixtures were considered and various heat transfer correlations were proposed. (4) Research papers have been reviewed in the field of building facilities by grouping into the researches on heat and cold sources, air conditioning and air cleaning, ventilation and fire research including tunnel ventilation, flow control of piping system, and sound research with drain system. Main focuses have been addressed to the promotion of efficient or effective use of energy, which helps to save energy and results in reduced environmental pollution and operating cost. (5) Studies were mostly focused on analyzing the indoor environment in various spaces like cars, old tombs, machine rooms, and etc. in an architectural environmental field. Moreover, subjects of various fields such as the evaluation of noise, thermal environment, indoor air quality and development of energy analysis program were researched by various methods of survey, simulation, and field experiment. |