Conference Paper

Proceedings of Building Simulation 2019: 16th Conference of IBPSA

Development of Energy Efficiency Estimation Method for Variable Refrigerant Flow Air-Conditioning System with Unbalanced Heat Load Operation

Masato Miyata, Koji Kurotori, Napoleon Enteria, Hideki Yamaguchi, Takao Sawachi, Yasuo Kuwasawa
National Institute for Land and Infrastructure Management, Japan

DOI: https://doi.org/10.26868/25222708.2019.210667
Abstract: This research proposes an appropriate method of estimating the energy efficiency of a Variable Refrigerant Flow air-conditioning system. In particular, this research tries to develop a method of accurately estimating energy efficiency when the heat load of each unit is unequal and unbalanced. This report presents the results of 36 performance measurements from a special laboratory that connects multiple constant temperature and humidity chambers. The experimental results indicated that the energy efficiency of the system when the load of each indoor unit was equal was higher than the efficiency when the load of each indoor unit was unbalanced, and the difference in efficiency was about 20%. Based on the results, a mathematical model to estimate system energy efficiency taking into account the unbalanced load condition was developed.
Keywords: Multiple split-system air conditioners, performance curves, energy consumption, energy efficiency, refrigeration cycle
Pages: 1898 - 1905
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