Energetic Analysis of Low Global Warming Potential Refrigerants as Substitutes for R410A and R134a in Ground-Source Heat Pumps

The European building sector is responsible for approximately 40% of total energy consumption and for 36% of greenhouse gas emissions. Identifying technological solutions capable of reducing energy consumption and greenhouse gas emissions is one of the main objectives of the European Commission. Gro...

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Bibliographic Details
Published in:Energies (Basel) 2023-04, Vol.16 (9), p.3757
Main Authors: Fedele, Laura, Bobbo, Sergio, Menegazzo, Davide, De Carli, Michele, Carnieletto, Laura, Poletto, Fabio, Tarabotti, Andrea, Mendrinos, Dimitris, Mezzasalma, Giulia, Bernardi, Adriana
Format: Article
Language:English
Subjects:
Air pollution
Analysis
Climate change
Compression
Cooling
Emissions
Energy conservation
Energy consumption
Global warming
Global warming potential
Greenhouse effect
Greenhouse gases
ground-source heat pumps
Heat
Heat exchangers
Heat pumps
Heat sinks
HVAC equipment
low-GWP refrigerants
Mathematical models
Refrigerants
Research projects
thermodynamic cycle efficiency
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Summary:The European building sector is responsible for approximately 40% of total energy consumption and for 36% of greenhouse gas emissions. Identifying technological solutions capable of reducing energy consumption and greenhouse gas emissions is one of the main objectives of the European Commission. Ground source heat pumps (GSHPs) are of particular interest for this purpose, promising a considerable reduction in greenhouse gas emissions of HVAC systems. This paper reports the results of the energetic analysis carried out within the EU research project GEO4CIVHIC about the performance of geothermal heat pumps working with low-GWP refrigerants as alternatives for R134a and R410A. The work has been carried out through computer simulations based on base and regenerative reverse cycles. Several heat sink and heat source temperature conditions have been considered in order to evaluate the GSHPs’ performance in the whole range of real conditions that can be found in Europe. Particular attention has been paid to the evaluation of compression isentropic efficiency and its influence on the overall cycle performance when dealing with steady-state heat pump simulations. To do so, five different scenarios of isentropic efficiency calculation have been studied and discussed.
ISSN:1996-1073
1996-1073
DOI:10.3390/en16093757