토출가스 바이패스제어에 의한 산업용 냉각기의 온도제어

Temperature Control of Oil Cooler with Hot-gas Bypass

  • 변종영 (부경대학교 대학원 냉동공조공학과) ;
  • 주우진 (부경대학교 대학원 냉동공조공학과) ;
  • 최준혁 (부경대학교 대학원 냉동공조공학과) ;
  • 문춘근 ((주)대일) ;
  • 윤정인 (부경대학교 기계공학부) ;
  • 정석권 (부경대학교 기계공학부)
  • 발행 : 2009.06.25

초록

This paper presents precise temperature control of oil outlet in an oil cooler with hot-gas bypass control as an industrial refrigerator. The control system was designed for obtaining precise temperature control performance even though abrupt disturbances based on flow rate control of hot-gas bypass. PID controller was adopted in feedback control system. We showed that the gain of PID could be easily determined by using gain-tuning methods without any numerical model. Through some experiments, excellent control performances such as overshoot within 1.7%, steady state temperature error within ${\pm}0.1^{\circ}C$ were established by a simple PI controller. We expect that the system can control the target temperature within error of $0.33^{\circ}C$ under abrupt disturbances.

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