Study on Air-to-Water Heat Pumps Seasonal Performances for Heating in Greece

Georgios A Mouzeviris,Konstantinos T Papakostas

doi:10.3390/en15010279

Georgios A Mouzeviris, Konstantinos T Papakostas

Open Access

https://doi.org/10.3390/en15010279

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Journal: Energies	Publication Date: Jan 1, 2022
Citations: 5	License type: CC BY 4.0

Affiliation: Aristotle University of Thessaloniki

Abstract

Air-to-water heat pumps (AWHPs) is a very good option for efficient heating in the residential and commercial building sectors. Their performance and therefore the use of primary energy and CO2 gas emissions are affected by various factors. The aim of this paper is to present a study on the seasonal coefficient of performance in heating (SCOP) of AWHPs, which are available in the Greek market. The sample consists of 100 models in total, offered by 12 manufacturers, in a range of heat pump’s thermal capacity up to 50 kW. The calculation of SCOP values was performed according to the methodology proposed by the EN14825 standard. The results indicate how the heating capacity, the local climate, the supply water temperature, the compressor’s technology, and the control system affect the seasonal performance of the various AWHP models examined. Setting the SCOP ≥ 3 value as a criterion, the analysis that was carried out in four climatic zones A, B, C, and D of Greece, shows that there are many models that meet this criterion, and, in fact, their number increases from the coldest to warmer climates, in combination with lower water supply temperatures to the heating system and a control system with weather compensation.

Highlights

As the 21st century unfolds, government policies around the world are increasingly focused on tackling climate change and reducing CO2 emissions
The aim of this paper is to present a comparative analysis of the seasonal coefficient of performance in heating mode of Air-to-water heat pumps (AWHPs), which are available in the Greek market
AWHPs, which are available in the Greek market, was performed

Summary

Introduction

As the 21st century unfolds, government policies around the world are increasingly focused on tackling climate change and reducing CO2 emissions. In the European Union (EU), energy policy priorities in the last years have been the lower dependence on fossil fuels and the reduction of their combustion emissions, the improvement in energy efficiency, and the sustainability in energy utilization with increasing participation of renewable energy sources (RES) in final energy consumption. One of the most important energy consumers and main contributors to greenhouse gas (GHG) emissions is the building sector. In 2018, the EU’s building sector was responsible for about 40.8% of total final energy consumption [1]. Space heating and domestic hot water production in residential buildings accounted for 63.6% and 14.8% of total energy consumption, respectively [2]. In 2019, the building sector in Greece accounted for 40.6%

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