Navigating Long-Term Use of Refrigerant Blends in Unitary Air-Source Heat Pumps for Colder Climates
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21720%2F25%3A00385449" target="_blank" >RIV/68407700:21720/25:00385449 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.63044/s25nav37" target="_blank" >https://doi.org/10.63044/s25nav37</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.63044/s25nav37" target="_blank" >10.63044/s25nav37</a>
Alternative languages
Result language
angličtina
Original language name
Navigating Long-Term Use of Refrigerant Blends in Unitary Air-Source Heat Pumps for Colder Climates
Original language description
The stringent regulatory shift towards low-global warming potential (GWP) refrigerants has necessitated the development of alternatives to existing high-GWP working fluids used in residential heat pumps and air conditioning systems. The scarcity of single-component refrigerants that are safe, efficient, environmentally sustainable, and cost-effective has driven increased interest in refrigerant mixtures as a viable solution. This study presents a theoretical screening of refrigerant mixtures to identify drop-in replacements for R410A that demonstrate ultra-low GWP and reduced flammability, designed for cold-climate applications. Binary and ternary blends were systematically evaluated using fifteen pure refrigerants, which included hydrocarbons (HC), hydrofluorocarbons (HFC), hydrofluoroolefins (HFO), and CO2. The mixtures were investigated in 0.04-mole fraction increments, optimizing thermodynamic performance, environmental impact, and flammability characteristics. The analysis identified four promising mixtures incorporating R1123, complemented by R1234yf and an HC such as R290. This work highlights the potential of carefully engineered refrigerant blends to achieve regulatory compliance while meeting operational performance requirements. The findings contribute to developing sustainable refrigerants and offer valuable insights for future experimental validation and practical implementation.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20303 - Thermodynamics
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of 2025 ASHRAE Annual Conference
ISBN
978-1-964173-20-7
ISSN
0001-2505
e-ISSN
—
Number of pages
9
Pages from-to
333-341
Publisher name
ASHRAE
Place of publication
Atlanta
Event location
Phoenix, Arizona
Event date
Jun 21, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001605660100042