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운전조건변화에 따른 트윈 로터리 압축기의 기계손실 분석
신명수(Myeong Su Shin),나상경(Sang Kyung Na),민병채(Byung Chae Min),최윤혁(Yun Hyuk Choi),최경민(Gyung Min Choi) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
This paper is a study on the mechanical loss of the twin rotary compressor with evaporating temperature and condensing temperature. The simulation results were verified by the manufacturer data. Cooling capacity and compressor input power were consistent with the manufacturer data within 4.59 and 6.79 %, respectively. Total mechanical loss increase with an increase of evaporating pressure and condensing pressure. The loss between vane and vane slot and the loss between roller and eccentric have a large portion on total mechanical loss.
리니어 압축기를 적용한 냉장고 사이클의 냉동 부하변동에 따른 운전특성에 관한 연구
윤태승(Tae-Seung Yoon),송상진(Sang-Jin Song),민병채(Byung-Chae Min),김건우(Geon-woo Kim),나상경(Sang-kyung Na),최경민(Gyung-Min Choi) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
An experimental investigation on effects of variation of ambient temperature and compressor stroke in a refrigerator was conducted with a linear compressor. The refrigerant of 115g was charged from the results of comparing the power consumption and on-time ratio with different refrigerant charge amount. The cooling capacity of a linear compressor was increased with the ambient temperature increase due to ability of self-modulation of the compressor. The power consumption and cooling time were compared with variation of the cooling capacity of a linear compressor from 60% to 100%. As a result, the power consumption of a linear compressor was reduced by 22.4% with the compressor capacity increase. However, on-time ratio was increased by 11.3%.
롤링 피스톤형 로타리 압축기에서의 롤러와 실린더 간극 간 누설 유량 예측
김건우(Geon-woo Kim),노기율(Ki-youl Noh),민병채(Byung-chae Min),송상진(Sang-jin Song),나상경(Sang-kyung Na),윤태승(Tae-seung Yoon),양장식(Jang-sik Yang),최경민(Gyung-min Choi),김덕줄(Duck-jool Kim) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
Functional formula of the flow coefficients for the radial clearance in a rolling piston rotary compressor was developed by the experiments and CFD (Computational Fluid Dynamics) to improve the accuracy of a compressor performance simulation. The experiments and CFD simulation were conducted to obtain the flow coefficients at the radial clearance with the assumptions of incompressible flow and steady state. The experiments were carried out with the variation of pressure ratio and low upstream pressure using the nitrogen as a working fluid. The validated CFD model was adopted to calculate the flow coefficients with change area of the radial clearance and high upstream pressure. The functional formula obtained from the results of the CFD calculation was applied to compressor performance simulation for calculating the leakage through the radial clearance. The results of compressor simulation with the functional formula showed tolerable errors with the experimental data of the compressor calorimeter in terms of EER (Energy Efficiency Ratio). Thus, the function of the flow coefficients may be acceptable for prediction of leakage through the radial clearance under the various conditions.