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Title: Energy and exergy analyses of R513a as a R134a drop-in replacement in a vapor compression refrigeration system

Abstract

R513a (XP10), a mixer of 56% R1234yf (C3H2F4) and 44% R134a (CH2FCF3), has similar thermophysical characteristics to R134a but only half of its global warming potential (GWP). This paper uses an economized-cycle vaper compression refrigeration system as an example to investigate the energy and exergy performance of R513a used as a drop-in replacement for R134a. Differing from previous research, this study examines the entire system operating zone to identify the performance differences in terms of capacity, COP, exergy destruction rate, and exergy efficiency between R513a and R134a systems. The analysis found that a system with drop-in R513a demonstrates reduced capacity by up to 12% and efficiency (up to 9% with COP and 14% with exergy efficiency) under a majority of operating conditions, while exhibiting less irreversibility (5% to 13%) under high-ambient, high-space temperature conditions and better exergy efficiency of 3% in low-ambient conditions. In addition, the contribution of each individual component to the exergy destruction rate at various operating conditions is identified. To improve the energy and exergy efficiency of a R513a system, the analysis results indicate that the compressor is the first component that should be redesigned or reselected, followed by the economizer, valves, and evaporator. The condenser influencemore » is negligible.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. UTC – Carrier Corporation, Charlotte, NC (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1606884
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Refrigeration
Additional Journal Information:
Journal Volume: 112; Journal Issue: C; Journal ID: ISSN 0140-7007
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Alternative refrigerant; Vapor compressor refrigeration; Exergy destruction; Irreversibility; R513A

Citation Formats

Sun, Jian, Li, Wenhua, and Cui, Borui. Energy and exergy analyses of R513a as a R134a drop-in replacement in a vapor compression refrigeration system. United States: N. p., 2019. Web. https://doi.org/10.1016/j.ijrefrig.2019.12.014.
Sun, Jian, Li, Wenhua, & Cui, Borui. Energy and exergy analyses of R513a as a R134a drop-in replacement in a vapor compression refrigeration system. United States. https://doi.org/10.1016/j.ijrefrig.2019.12.014
Sun, Jian, Li, Wenhua, and Cui, Borui. Mon . "Energy and exergy analyses of R513a as a R134a drop-in replacement in a vapor compression refrigeration system". United States. https://doi.org/10.1016/j.ijrefrig.2019.12.014. https://www.osti.gov/servlets/purl/1606884.
@article{osti_1606884,
title = {Energy and exergy analyses of R513a as a R134a drop-in replacement in a vapor compression refrigeration system},
author = {Sun, Jian and Li, Wenhua and Cui, Borui},
abstractNote = {R513a (XP10), a mixer of 56% R1234yf (C3H2F4) and 44% R134a (CH2FCF3), has similar thermophysical characteristics to R134a but only half of its global warming potential (GWP). This paper uses an economized-cycle vaper compression refrigeration system as an example to investigate the energy and exergy performance of R513a used as a drop-in replacement for R134a. Differing from previous research, this study examines the entire system operating zone to identify the performance differences in terms of capacity, COP, exergy destruction rate, and exergy efficiency between R513a and R134a systems. The analysis found that a system with drop-in R513a demonstrates reduced capacity by up to 12% and efficiency (up to 9% with COP and 14% with exergy efficiency) under a majority of operating conditions, while exhibiting less irreversibility (5% to 13%) under high-ambient, high-space temperature conditions and better exergy efficiency of 3% in low-ambient conditions. In addition, the contribution of each individual component to the exergy destruction rate at various operating conditions is identified. To improve the energy and exergy efficiency of a R513a system, the analysis results indicate that the compressor is the first component that should be redesigned or reselected, followed by the economizer, valves, and evaporator. The condenser influence is negligible.},
doi = {10.1016/j.ijrefrig.2019.12.014},
journal = {International Journal of Refrigeration},
number = C,
volume = 112,
place = {United States},
year = {2019},
month = {12}
}

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