Analysis of Low Global Warming Potential Fluoride Working Fluids in Vapour Compression Systems. Experimental Evaluation of Commercial Refrigeration Alternatives.

Babiloni, Adrián Mota

doi:10.4995/thesis/10251/62680

Cited by 5 publications

(5 citation statements)

References 77 publications

(80 reference statements)

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“…To date, various models were reported to simulate the compressor depending on the assumptions made by the authors. Most of the published papers reported energetic analysis to compare several fluids used to simulate an ideal compressor with a constant isentropic efficiency equal to 1 [8,11,17]. Bobbo et al [22] used manufacturer compressor maps to calculate the isentropic efficiency as a function of condensing and evaporating temperatures.…”

Section: Compressormentioning

confidence: 99%

“…HFCs are characterized by relatively high GWP and so are subject to restrictions imposed by EU Regulation 517/2014 [7]. Consequently, the price of HFCs will continue to rise, urging the industry to find economically and environmentally sustainable low GWP alternatives [8]. R134a and R410A, with GWP 100 values of 1430 and 2088, respectively, are the most used refrigerants in the heat pumps and chillers sector.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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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.

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Section: Compressormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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“…HFCs are characterised by a relatively high GWP and are subjected to restrictions imposed by EU Regulation 517/2014 [88]. Consequently, HFC price will continue to increase, urging the industry to find economically and environmentally sustainable low GWP alternatives [89]. The introduced regulation system imposed several limitations on the available F-gases share on the market, with distinctions related to the final use of a refrigerating system.…”

Section: Refrigerant Fluidsmentioning

confidence: 99%

State of the Art, Perspective and Obstacles of Ground-Source Heat Pump Technology in the European Building Sector: A Review

et al. 2022

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In the European Union, 40% of the overall final energy consumption is attributable to the buildings sector. A reason for such data may be found considering that the great majority of the building stock is more than 40 years old. According to the European Commission, an interesting potential lies in the refurbishment of the building sector, and heat pump technology has been recognized as one of the most cost-effective solutions to tackle the environmental issue of this sector. Regarding heat pump technology, ground-source heat pumps (GSHPs) have been proven to be the most efficient solution on equal boundary conditions. Despite this, in most EU states’ markets, GSHPs hold only a small market share with respect to air-source heat pumps. In this paper, the state of art and possible future developments of GSHP technology have been reviewed together with a focus on the potential of such technology, most of all on the refurbishment of existing buildings, and on the obstacles to its spread. The state of art of borehole heat exchangers has been studied, focusing on the parameters characterizing the outside pipe and the pipe itself, i.e., pipe and grout materials. Moreover, an overview on the last developments involving refrigerants and secondary fluids is given. Finally, the design and control strategies of GSHPs have been reviewed.

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“…1990'lı yıllardan beri gelişmiş ülkelerde kullanılan soğutma sistemlerinde yüksek küresel ısınma potansiyeline sahip soğutucu akışkanlar kullanılmaktadır. Bu soğutucu akışanların sızıntı yoluyla atmosfere salınması nedeniyle iklim değişikliği üzerinde etkisi büyüktür [1][2].…”

Section: Introductionunclassified

R134a'ya Alternatif Bir Soğutucu Akışkan (R513A) Kullanan Buhar Sıkıştırmalı Soğutma Sistemlerinin Enerji ve Çevresel Analizi

Yildiz

Yildirim

2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Küresel ısınma Dünya gündeminin ana konularından birisidir. Dolayısıyla, soğutucu akışkanların çevresel etkilerini azaltmak için birçok çalışma ve düzenleme yapılmaktadır. Çevre dostu soğutucu akışkanların kullanılması soğutucu akışkanların çevre üzerinde olumsuz etkisinin azaltılması için gereklidir. Düşük küresel ısınma potansiyeline (GWP) sahip HFC/HFO soğutucu akışkan karışımları HFC soğutucu akışkanların yerini aldığı düşünülmekte ve son zamanlarda ticari olarak üretilmektedirler. Bu çalışmada, R134a ve R513A soğutucu akışkanlarının performansları teorik olarak incelenmiştir. Ayrıca soğutucu akışkanların çevresel etki değerlendirilmesi yaşamsal döngü iklim performansına (LCCP) göre incelenmiştir. Soğutucu akışkanların enerji performansları farklı evaporatör (-15 ile 2.5 o C arasında) ve kondenser (30 ve 35 o C) sıcaklıkları için yapılmıştır. Evaportaör sıcaklığı-15 o C ve kondenser sıcaklığı 30 o C iken R134a ve R513A'nın COP değerleri sırasıyla 3.87 ve 3.77'dir. Aynı kondenser sıcaklığı için evaporatör sıcaklığı 2.5 o C olduğunda R134a ve R513A'nın COP değerleri sırasıyla 7.28 ve 7.16 olmaktadır. Dolaysıyla R134a ve R513A'nın COP değerlerinin hemen hemen benzer olduğu söylenebilir. R513A'nın GWP oranı R134a'nın yaklaşık yarısı kadardır. Dolayısıyla R513A R134a'dan %56 oranında daha az direkt emisyon (DE) değerine sahip olduğu görülmüştür. Her iki soğutucu akışkanın toplam emisyon değerinin büyük bir çoğunluğu (R134a için %94.98, R513A için %96.77) sistemin enerji tüketiminden kaynaklanmaktadır. R513A soğutucu akışkanın yanıcılık özelliğinin yoktur ayrıca doğrudan R134a ile çalışan sistemde herhangi bir değişiklik yapmadan kullanılabilir. R513A yukarıda saydığımız özelliklerden dolayı R134a'ya alternatif olarak kullanılabilir.

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Analysis of Low Global Warming Potential Fluoride Working Fluids in Vapour Compression Systems. Experimental Evaluation of Commercial Refrigeration Alternatives.

Cited by 5 publications

References 77 publications

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

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

State of the Art, Perspective and Obstacles of Ground-Source Heat Pump Technology in the European Building Sector: A Review

R134a'ya Alternatif Bir Soğutucu Akışkan (R513A) Kullanan Buhar Sıkıştırmalı Soğutma Sistemlerinin Enerji ve Çevresel Analizi

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