• 제목/요약/키워드: 가변압축기

검색결과 106건 처리시간 0.039초

가변속 스크롤 압축기의 운전조건의 변화에 따른 성능 해석 (Performance Analysis on the Variable Speed Scroll Compressor with Operating Conditions)

  • 박홍희;박윤철;김용찬
    • 설비공학논문집
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    • 제12권7호
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    • pp.649-658
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    • 2000
  • Thermodynamic modeling of low-pressure scroll compressor was developed by combining continuity and energy conservation equation. Suction gas heating was considered using energy balance inside the low pressure shell. Pressure, temperature and mass of refrigerant-22 as a function of orbiting angle were calculated by solving the governing equations using fourth order Rung-Kutta scheme. Motor efficiency was taken by experiments with a variation of frequency. The developed model was applied to the analysis of an inverter driven scroll compressor with a variation of frequency, pressure ratio and operating conditions. The model was verified with the experimental results at the same operating conditions. The developed model was adequate to predict performance of the inverter driven scroll compressor as a function of operating conditions. Calculated parameters from the model were discharge temperature, mass flow rate, power input, COP, and thermodynamic properties with respect to orbiting angle. To enhance the performance of a scroll compressor, it is essential to diminish leakage at low frequency level and improve the mechanical efficiency at high frequency level.

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다입력변수를 사용한 멀티형 공조시스템 압축기와 전자팽창밸브의 퍼지 제어 알고리즘 (Fuzzy Control Algorithms for the Compressor and the Electronic Expansion Valve of a Multi-type Air-conditioning System using Multiple Input Variables)

  • 한도영;박관준
    • 설비공학논문집
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    • 제18권2호
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    • pp.163-171
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    • 2006
  • In order to control multi-zone temperatures, a multi-type air-conditioning system may be used. In this study, control algorithms for the compressor and the electronic expansion valve of a multi-type air-conditioning system were developed by using fuzzy logics. The compressor control algorithm was composed of a compressor pressure setpoint algorithm, a compressor pressure setpoint reset algorithm, and a compressor frequency setpoint algorithm. The electronic expansion valve control algorithm was composed of an indoor temperature control algorithm, and a superheat control algorithm. These algorithms were applied to a multi-type air-conditioning system. Test showed good results for the control of a multi-type air-conditioning system.

에어컨의 고효율화를 위한 용량가변 방식 비교에 관한 연구 (Benchmark Performance Analysis of Vapor Compression System with Capacity Modulation Compressor)

  • 유윤호;황윤제;김철민;조관식
    • 설비공학논문집
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    • 제14권2호
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    • pp.98-107
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    • 2002
  • The performance of a capacity controlled system, which are tandem, pole change, bypass and inverter driven compressor, has been compared with that of a con- ventional constant speed system. It has been found that capacity modulated system can offer more than 14 percent improvement in SEER over the conventional system. Comparative test results show that two compressor system can attain an improvement in SEER up to 42% over the conventional on/off system, and is feasible without additional investment.

압축기 정익, 터빈 노즐 가변 메카니즘 및 제어기법 연구 (Study on Variable Systems for Compressor and Turbine and its Control Scheme)

  • 김상조;김동현;배경욱;김대일;손창민;김귀순;이대우;고정상;최동환;김명호;민성기
    • 한국추진공학회지
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    • 제19권5호
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    • pp.1-14
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    • 2015
  • 아음속에서 초음속까지 운용되어야 하는 초음속 터빈엔진의 경우, 엔진 운용 공기량이 범위가 넓고 추력 및 연료소모율 등의 엔진 성능에 대해 요구조건이 높으므로 가변시스템 및 이를 제어하기 위한 최적의 제어로직 개발이 반드시 필요하다. 본 연구에서는 압축기 가변 시스템이 적용된 가스터빈 성능해석 모델 및 제어기법을 개발하였다. 그리고 터빈 노즐 가변에 따른 엔진 운용 특성을 분석하였다. 또한 가변 시스템을 구동하는 액추에이터에 대한 개념 설계를 수행 하였다. 저바이패스비 혼합흐름 터보팬 엔진에 대한 탈설계점에서의 성능해석을 수행하였으며, 제어기법을 적용하여 탈설계점에서의 서지마진을 확보할 수 있었다.

스크루 압축기용 고효율 30hp BLDC MOTOR 설계 (Development of High Efficiency 30hp BLDC Motor for Screw Compressor)

  • 이준호;김기선;이율재;김광헌;박성준
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2010년도 하계학술대회 논문집
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    • pp.438-439
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    • 2010
  • Compressor의 개발 동향은 높은 에너지 효율과 넓은 운전영역의 특성을 갖는 방향으로 성장해 왔다. 특히 기존의 AC Motor를 DC Motor로 대체함으로써 더 높은 효율을 얻을 수 있게 되었다. 본 논문은 압축기의 핵심 부품인 30hp급 용량에 92%의 효율과 3800RPM 가변속 운전이 가능한 BLDC Motor를 맥스웰을 이용하여 시뮬레이션하고 실제 제작을 통해 효율과 가변속 운전을 실험하였다.

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