Abstract
Variable Refrigerant Flow Rate (VRF) System is used as air-conditioning systems in small and medium-sized buildings in Japan. Traditionally, the two most common types of VRF systems are electric motor driven VRF Systems (EHP) and gas engine driven VRF Systems (GHP). However, in recent years’ society is increasingly demanding energy saving and the best energy mix. This requires an air-conditioning system that has energy flexibly depending on the application and situation. As a result, a hybrid airconditioning system (called Hybrid VRF System) that satisfies theses need has been developed. The developed system can operate according to energy price and usage situations by connecting GHP and EHP with one refrigerant cycle. In recent years, a Hybrid VRF Systems have been used for small to mediumsized buildings. In this paper, the author evaluated the performance of an integrated Hybrid VRF System based on the energy evaluation method prescribed by Japanese law.
Highlights
Aiming to realize stable energy supply that is less burdensome on society and that operates as an energy supply and demand structure is an essential condition for the development of Japan
The Integrated Hybrid Variable Refrigerant Flow Rate (VRF) System, GHP and EHP were connected to the same refrigerant system, and the operating ratio of GHP and EHP could be arbitrarily changed with respect to the air conditioning load demanded by the indoor unit
The primary energy consumption tends to decrease as the air conditioning capacity is narrowed down, and the operation ratio of GHP tends to increase in the integrated Hybrid VRF System
Summary
The liberalization of electricity and gas markets has been implemented As a result, it seems that various contracts will appear, and the importance priced for air-conditioning systems that can freely select energy according to circumstances has increased. It seems that various contracts will appear, and the importance priced for air-conditioning systems that can freely select energy according to circumstances has increased Based on this background, an integrated Hybrid VRF System having an electric motor driven VRF System (EHP) and a gas engine driven VRF System (GHP) in the same refrigerant system was developed. The Web Program is a calculation support program that can be used on a Web browser It was used as an energy evaluation method based on Japanese laws and ordinances. The author evaluated the performance of the integrated Hybrid VRF System using the energy evaluation method Web Program established by Japanese law
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