Seasonal energy performance characteristics of novel ejector-expansion air conditioners with low-GWP refrigerants. (15th November 2020)

• Record Type: Journal Article
• Authors: Jeon, Yongseok; Kim, Sunjae; Lee, Sang Hun; Chung, Hyun Joon; Kim, Yongchan
• Is Part Of: Applied energy. Volume 278(2020)
• Publication Date: 2020-11-15
• Subjects: Ejector-expansion air conditioner -- Ejector -- Seasonal performance -- Life cycle climate performance -- Low-GWP refrigerant; Power (Mechanics) -- Periodicals; Energy conservation -- Periodicals; Energy conversion -- Periodicals; 621.042
• DOI: 10.1016/j.apenergy.2020.115715
• Languages: English
• ISSNs: 0306-2619

Abstract

Highlights: A simulation model for ejector-expansion air conditioners (EEACs) is developed. Seasonal performances (CSPFs) of EEACs with low-GWP refrigerants are evaluated. The CSPFs and LCCPs of the EEACs and baseline air conditioners are compared. R290 is proposed to be the best alternative for EEACs, based on the CSPF and LCCP. Abstract: The objective of this study is to investigate the seasonal performance characteristics of novel ejector-expansion air conditioners (EEACs) with low global warming potential refrigerants. A simplified simulation model for EEACs is developed and validated using measured data. Using a simulation model, the coefficient of performance, cooling seasonal performance factor, and life cycle climate performance of the EEACs employing low global warming potential refrigerants are analyzed at various operating conditions and modes. In addition, the climatic effects on the cooling seasonal performance factors and life cycle climate performances of the EEACs are evaluated at four different weather conditions. The EEAC with R290 exhibits the cooling seasonal performance factor and total CO2 emissions that are 22% higher and 23.3% lower, respectively, than those of the baseline air conditioner with R410A. In general, R290 is the best working fluid for EEACs in terms of the seasonal performance and lifetime environmental factor.