http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
배석정(Sukjung Bae),허형석(Hyungseok Heo),유한성(Hanseong Yoo) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
A construction equipment such as an excavator wastes about 90% energy out of the fuel. The annual fuel cost of an excavator is comparable to the price of the equipment. Application of a waste heat recovery system on an excavator is attractive and of high return by fuel saving considering the system cost and additional weight. A remarkable feature of the excavator is that the heat source for the waste heat recovery includes the hydraulic fluid in addition to the engine exhaust gas and the engine coolant. It is advantageous to choose a refrigerant in order to recover wast heat at relatively low temperatures. In this study, cycle analysis has been conducted to derive a schematic outline of the system layout and the performance specifications of the core parts of the waste heat recovery system for a 20-ton class excavator. From the cycle analysis, the adequate working fluid has been chosen from the refrigerant group. The cycle analysis has been performed via Refprop 8, which can calculate the properties at any temperature and pressure of refrigerants.
건설기계 폐열회수를 위한 Organic Rankine Cycle 해석 연구
김재덕(kim Jaeduk),강석호(Kang Seokho),유한성(Yoo Hanseong),정주영(Jeong Jooyeong) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Recently, there have been consistent research efforts to improve fuel economy as response to the depletion of fossil fuels and global warming. With regard to construction equipment (i.e., one of the most energy-wasting types of machinery), fuel economy improvement through advancement in engine technologies has reached its limit. Hence, we conducted a study in which a waste heat recovery (WHR) system was incorporated into a construction machine to improve the energy efficiency. Excavators are one such machine where significant portions of the fuel-generated energy are not utilized effectively for work but instead wastefully discharged to the atmosphere.