연구홍보포털

논문 초록 (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 area s of heating, cooling, ventilation, sanitation, and indoor environment s of buildings and plant facilities. Conclusions are as follows. (1) Research trends of thermal and fluid engineering have been sur veyed as groups of fluid machinery and fluid flow, thermodynamic cycle, and new and renewable energy. Various topics were presented in the fie ld 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 geotherma l energy, fuel cell, biogas, reformer, solar water heating system, and metane hydration. (2) Research works on heattransfer area have been reviewed in the categ ories of heat transfer characteristics, pool boiling and condensing h eat transfer, nanofluids and industrial heat exchangers. Researches o n heat transfer characteristics included heat transfer above liquid helium surface in a cryostat, methane hydrate formation, heat and mas s transfer in a liquid desiccant dehumidifier, thermoelectr ic air-cooling system, heat transfer in multiple slot impinging je t, and heat transfer enhancement by protrusion-in-dimples. In the area of pool boiling and condensing heat transfer, researches on pool boilin g of water in low-finand turbo-B surfaces, pool boiling of R245a, conv ective boiling two-phase flow in trapezoidal microchannels, condensing of FC-72 on pin-finned surfaces, and natural circulation vertical e vaporator were actively performed. In the area of nanofluids, thermal ch aracteristics of heat pipes using water-based MWCNT nanofluids and the thermal conductivity and viscosity weremeasured. In the area o f industrial heat exchangers, researches