Variable fuzzy control for heat pump operation

• Published in: Journal of mechanical science and technology Vol. 25; no. 1; pp. 201 - 208
• Main Authors: Cho, Eunjun, Ha, Manyeong, Chang, Sedong, Hwang, Yoonjei
• Format: Journal Article
• Language: English
• Published: Heidelberg Korean Society of Mechanical Engineers 2011; Springer Nature B.V; 대한기계학회
• Subjects: Air conditioning. Ventilation; Applied sciences; Control; Dynamical Systems; Energy; Energy. Thermal use of fuels; Engineering; Exact sciences and technology; Fuzzy; Fuzzy control; Fuzzy logic; Fuzzy set theory; Heating, air conditioning and ventilation; Indoor; Industrial and Production Engineering; Mechanical Engineering; Mechanical engineering. Machine design; Optimization; Outdoor; Pump and compressors (turbocompressors, fans, etc.); Tables (data); Vibration; 기계공학; Fuzzy control; Air conditioning system; Heat pump; Variable capacity; Air conditioning; Superheating; Expansion valve; Outdoor installation; Air conditioning equipment; Compressor; Optimization; Operating conditions; Fuzzy logic; Fan; Indoor installation
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-010-1105-x

The aim of this study is to determine the electronic expansion valve (EEV) opening using a fuzzy table when the superheating of a variable capacity air conditioning system is controlled via fuzzy control. Optimum opening of EEV is determined by applying superheat control method, where factors including superheat error and superheat gradient, as well as compressor capacity, indoor temperature, outdoor temperature, and indoor fan rpm, are considered. This control algorithm uses a fuzzy table wherein values are changed to optimal values according to operating conditions, enabling fast and stable control.