Ventilation for buildings. Energy performance of buildings. Guidelines for inspection of air-conditioning systems

2015 ◽  
Keyword(s):  
Air Conditioning ◽  
Energy Performance ◽  
Energy Performance Of Buildings ◽  
Air Conditioning Systems

scholarly journals Numerical Investigation of Air Movement on Laboratory Scale Psychrometric Chamber

2021 ◽  
Vol 84 (2) ◽  
pp. 82-91
Author(s):  
Elang Pramudya Wijaya ◽  
Ardiyansyah Saad Yatim
Keyword(s):  
Air Conditioning ◽  
Test Chamber ◽  
Energy Performance ◽  
Air Distribution ◽  
Energy Prices ◽  
Air Conditioner ◽  
Residential Areas ◽  
Air Movement ◽  
Government Rules ◽  
Air Conditioning Systems

Higher energy demands in favorable energy prices increasing people's affordability of the cooling devices, causing most building and residential areas to wear air conditioning systems. Higher energy saving, efficiency, and eco-friendly equipment have become a challenge for manufacturers and researchers. Also, Indonesia's government rules the energy efficiency by SKEM (Minimum Standard of Energy Performance) by air conditioning equipment's labeling. In this study, the use of perforated ceiling was selected due to the excellent air distribution performance of the panels. This study analyzes the air circulation distribution (air loop) in a psychometric chamber using computational fluid dynamics (CFD), especially placing the air conditioner test unit. The numerical studies are performed with porous media models. A CFD model was used to analyze the air distribution in the psychrometric chamber. The simulation results show that the higher value of C1 resulted in a higher value of velocity. Furthermore, the pressure drop in the test chamber did not show any significant influence. In all cases, the influence of C1 value did not significantly affect the air movement in the test chamber.

scholarly journals Energy Performance Evaluation of Hybrid VRF Systems Based on Japanese Government-Designated Method

2019 ◽  
Vol 111 ◽  
pp. 04029
Author(s):  
Tokimi Kawase ◽  
Atsushi Hashimoto ◽  
Ken Yasuda ◽  
Tatsuo Nobe
Keyword(s):  
Performance Evaluation ◽  
Air Conditioning ◽  
Evaluation Method ◽  
Energy Performance ◽  
Energy Price ◽  
Air Conditioning System ◽  
Gas Engine ◽  
Energy Evaluation ◽  
Japanese Law ◽  
Air Conditioning Systems

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.

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