Documents disponibles écrits par cet auteur

Studies on the heating capacity control of a multi-type heat pump system applying a multi-input multi-output (MIMO) method / Il Hwan Lee in International journal of refrigeration, Vol. 34 N° 2 (Mars 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 2 (Mars 2011) . - pp. 416-428 Titre : Studies on the heating capacity control of a multi-type heat pump system applying a multi-input multi-output (MIMO) method Titre original : Etudes sur la régulation de la puissance thermique d'un système à pompe à chaleur de type multiple employant une méthode comportant plusieurs grandeurs d'entrée et de sortie Type de document : texte imprimé Auteurs : Il Hwan Lee, Auteur ; Jong Won Choi, Auteur ; Min Soo Kim, Auteur Année de publication : 2011 Article en page(s) : pp. 416-428 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Capacity  control  Multi-input  Multi-output  Heat  pump  System  Control  Variable  Integral Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper describes a method to control capacity of a multi-type heat pump system. Because indoor units are interconnected, alteration of the heating or cooling setting of one indoor unit can influence the performance of the other indoor units. Proportional-integral (PI) controllers were used to assess system performance, and the PI controllers’ gain values were optimized by using a genetic algorithm. A system model was established following a system identification optimization process, and a pseudo random binary sequence was selected as the system identification input signal. A multi-input multi-output (MIMO) controller was more effective in reducing such cross-coupling effects than a single-input single-output (SISO) controller. The temperature at the secondary fluid outlet in the condenser and the saturation pressure at the evaporator were selected as the control variables in the MIMO controller. The experimental results showed that an optimized MIMO controller could reduce overshoot by up to 40% compared with the results using a SISO controller. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002173 [article] Studies on the heating capacity control of a multi-type heat pump system applying a multi-input multi-output (MIMO) method = Etudes sur la régulation de la puissance thermique d'un système à pompe à chaleur de type multiple employant une méthode comportant plusieurs grandeurs d'entrée et de sortie [texte imprimé] / Il Hwan Lee, Auteur ; Jong Won Choi, Auteur ; Min Soo Kim, Auteur . - 2011 . - pp. 416-428. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 2 (Mars 2011) . - pp. 416-428 Mots-clés : Capacity  control  Multi-input  Multi-output  Heat  pump  System  Control  Variable  Integral Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper describes a method to control capacity of a multi-type heat pump system. Because indoor units are interconnected, alteration of the heating or cooling setting of one indoor unit can influence the performance of the other indoor units. Proportional-integral (PI) controllers were used to assess system performance, and the PI controllers’ gain values were optimized by using a genetic algorithm. A system model was established following a system identification optimization process, and a pseudo random binary sequence was selected as the system identification input signal. A multi-input multi-output (MIMO) controller was more effective in reducing such cross-coupling effects than a single-input single-output (SISO) controller. The temperature at the secondary fluid outlet in the condenser and the saturation pressure at the evaporator were selected as the control variables in the MIMO controller. The experimental results showed that an optimized MIMO controller could reduce overshoot by up to 40% compared with the results using a SISO controller. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002173