Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Capacity Modulation of a Multi-Type Heat Pump System Using PID Control

PID 제어를 이용한 멀티형 열펌프의 용량조절

  • 정대성 (서울대학교 기계항공공학부) ;
  • 김민성 (서울대학교 기계항공공학부) ;
  • 김민수 (서울대학교 기계항공공학부) ;
  • 이원용 (한국에너지기술연구소 대체에너지연구부)
  • Published : 2000.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

Performance of a water-to-water multi-type heat pump system using R22 has been experimentally investigated. Total refrigerant flow rate was adjusted with a variable speed compressor and the refrigerant flow rate for two indoor units were controlled by electronic expansion valves. Evaporator outlet pressure of refrigerant and indoor unit outlet temperatures of secondary fluid were selected as controlled variables. Experiments were carried out for both cooling and heating modes using PID control method. Results show that the multi-type heat pump system can be adequately controlled by keeping control gains at certain levels for various operating conditions.

Keywords