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

Sun, Jian; Li, Wenhua; Cui, Borui

doi:10.1016/j.ijrefrig.2019.12.014

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

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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:

^[1]; Li, Wenhua ^[2];

^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
UTC – Carrier Corporation, Charlotte, NC (United States)

Publication Date:: Mon Dec 16 00:00:00 EST 2019

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.  doi:10.1016/j.ijrefrig.2019.12.014.

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                    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

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                    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.

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@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         = {Mon Dec 16 00:00:00 EST 2019},

  month        = {Mon Dec 16 00:00:00 EST 2019}

}

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