| 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 2011 |
| Authors |
한화택(Hwataik Han) ; 이대영(Dae-Young Lee) ; 김서영(Seo Young Kim) ; 최종민(Jong Min Choi) ; 백용규(Yong-Kyoo Paik) ; 김수민(Sumin Kim) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2012.24.6.521 |
| Keywords |
공기조화 ; 냉동 ; 유체유동 ; 열전달 ; 건축설비 ; 건축환경 ; 유체기계 ; 배관 ; 신재생에너지 ; 열교환기 ; 히트파이프 ; 상변화 ; 대체냉매 ; 난방 ; 환기 ; 실내공기질 ; 온열쾌적성 ; 부하계산 Air conditioning ; Refrigeration ; Fluid flow ; Heat transfer ; Building facility ; Built environment ; Fluid machinery ; Piping ; New and renewable energy ; Heat exchanger ; Heat pipe ; Phase change ; Alternative refrigerants ; Heating ; Ventilation ; Indoor air quality ; Thermal comfort ; Load analysis |
| Abstract |
This article reviews the papers published in the Korean Journal of Air-Conditioning and Refrigeration Engineering during 2011. It is intended to understand the status of current research in the areas of heating, cooling, ventilation, sanitation, and indoor environments of buildings and plant facilities. Conclusions are as follows. (1) Research trends of thermal and fluid engineering have been surveyed as groups of fluid machinery and fluid flow, thermodynamic cycle, and new and renewable energy. Various topics were presented in the field of fluid machinery and fluid flow. Research issues mainly focused on the rankine cycle in the field of thermodynamic cycle. In the new and renewable energy area, researches were presented on geothermal energy, fuel cell, biogas, reformer, solar water heating system, and metane hydration. (2) Research works on heat transfer area have been reviewed in the categories of heat transfer characteristics, pool boiling and condensing heat transfer, nanofluids and industrial heat exchangers. Researches on heat transfer characteristics included heat transfer above liquid helium surface in a cryostat, methane hydrate formation, heat and mass transfer in a liquid desiccant dehumidifier, thermoelectric air-cooling system, heat transfer in multiple slot impinging jet, and heat transfer enhancement by protrusion-in-dimples. In the area of pool boiling and condensing heat transfer, researches on pool boiling of water in low-fin and turbo-B surfaces, pool boiling of R245a, convective boiling two-phase flow in trapezoidal microchannels, condensing of FC-72 on pin-finned surfaces, and natural circulation vertical evaporator were actively performed. In the area of nanofluids, thermal characteristics of heat pipes using water-based MWCNT nanofluids and the thermal conductivity and viscosity were measured. In the area of industrial heat exchangers, researches on fin-tube heat exchangers for waste gas heat recovery and Chevron type plate heat exchanger were implemented. (3) Refrigeration systems with alternative refrigerants such as CO2, hydrocarbons, and mixed refrigerants were studied. Heating performance improvement of heat pump systems were tried applying supplementary components such as a refrigerant heater or a solar collector. The effects of frost growth were studied on the operation characteristic of refrigeration systems and the energy performance of various defrost methods were evaluated. The current situation of the domestic cold storage facilities was analyzed and the future demand was predicted. (4) In building mechanical system fields, a variety of studies were conducted to achieve effective consumption of heat and maximize efficiency of heat in buildings. Various researches were performed to maximize performance of mechanical devices and optimize the operation of HVAC systems. (5) In the fields of architectural environment and energy, diverse purposes of studies were conducted such as indoor environment, building energy, and renewable energy. In particular, renewable energy and building energy-related researches have mainly been studied as reflecting the global interests. In addition, various researches have been performed for reducing cooling load in a building using spot exhaust air, natural ventilation and energy efficiency systems. |