Navigating Long-Term Use of Refrigerant Blends in Unitary Air-Source Heat Pumps for Colder Climates

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Navigating Long-Term Use of Refrigerant Blends in Unitary Air-Source Heat Pumps for Colder Climates

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Navigating Long-Term Use of Refrigerant Blends in Unitary Air-Source Heat Pumps for Colder Climates

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of 2025 ASHRAE Annual Conference

ISBN

978-1-964173-20-7

ISSN

0001-2505

e-ISSN

—

Počet stran výsledku

9

Strana od-do

333-341

Název nakladatele

ASHRAE

Místo vydání

Atlanta

Místo konání akce

Phoenix, Arizona

Datum konání akce

21. 6. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001605660100042