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Title: Hydrocarbons as natural refrigerants for heat pump water heating applications

Abstract

Growing awareness of the potential environmental impacts of conventional refrigerants (CFCs and HFCs) has led to efforts to identify suitable refrigerants for various heat pump applications with minimum environmental impact. This study is focused on the performance evaluation of pure propane and isobutane as drop-in-replacement for R134a for heat pump water heating (HPWH). A component-based model is used to predict the performance. Key performance parameters such as unified energy factor, first hour rating and thermal stratification in the water tank are investigated. Appropriate experiments are conducted to validate the finding from model. Simulation and experimental findings suggest that both alternative refrigerants could provide comparable system performance to that of the baseline system containing R134a. System refrigerant charge and the condenser discharge temperature are established to investigate the potential of hydrocarbon refrigerants to substitute R134a without significant system modifications.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1561618
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 25th IIR International congress on Refrigeration - Montreal, , Canada - 8/23/2019 8:00:00 AM-8/30/2019 8:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Nawaz, Kashif, Shen, Bo, Elatar, Ahmed, Baxter, Van D., and Abdelaziz, Omar. Hydrocarbons as natural refrigerants for heat pump water heating applications. United States: N. p., 2019. Web.
Nawaz, Kashif, Shen, Bo, Elatar, Ahmed, Baxter, Van D., & Abdelaziz, Omar. Hydrocarbons as natural refrigerants for heat pump water heating applications. United States.
Nawaz, Kashif, Shen, Bo, Elatar, Ahmed, Baxter, Van D., and Abdelaziz, Omar. Thu . "Hydrocarbons as natural refrigerants for heat pump water heating applications". United States. https://www.osti.gov/servlets/purl/1561618.
@article{osti_1561618,
title = {Hydrocarbons as natural refrigerants for heat pump water heating applications},
author = {Nawaz, Kashif and Shen, Bo and Elatar, Ahmed and Baxter, Van D. and Abdelaziz, Omar},
abstractNote = {Growing awareness of the potential environmental impacts of conventional refrigerants (CFCs and HFCs) has led to efforts to identify suitable refrigerants for various heat pump applications with minimum environmental impact. This study is focused on the performance evaluation of pure propane and isobutane as drop-in-replacement for R134a for heat pump water heating (HPWH). A component-based model is used to predict the performance. Key performance parameters such as unified energy factor, first hour rating and thermal stratification in the water tank are investigated. Appropriate experiments are conducted to validate the finding from model. Simulation and experimental findings suggest that both alternative refrigerants could provide comparable system performance to that of the baseline system containing R134a. System refrigerant charge and the condenser discharge temperature are established to investigate the potential of hydrocarbon refrigerants to substitute R134a without significant system modifications.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {8}
}

Conference:
Other availability
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