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Fadi Alsouda, Nick S. Bennett, Suvash C. Saha, Fatemeh Salehi and Mohammad S. Islam
Air conditioning and refrigeration have become necessary in modern life, accounting for more than 7.8% of greenhouse gases (GHG) emitted globally. Reducing the environmental impact of these systems is crucial for meeting the global GHG emission targets. ...
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Anil Basaran and Ali Cemal Benim
Nowadays, the demand for obtaining high heat flux values in small volumes has increased with the development of technology. Condensing flow inside mini- and microchannels has been becoming a promising solution for refrigeration, HVAC, air-conditioning, h...
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Matteo Dongellini, Christian Natale, Claudia Naldi, Eugenia Rossi di Schio, Paolo Valdiserri and Gian Luca Morini
An energy and environmental performance analysis of air-source and ground-source heat pump systems able to operate with traditional (R-410A) and alternative low-GWP (R-454B) refrigerants is conducted. The case study is composed of an existing residential...
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Mariano Pierantozzi, Sebastiano Tomassetti and Giovanni Di Nicola
In this paper, the procedure of finding the coefficients of an equation to describe the thermal conductivity of refrigerants low in global warming potential (GWP) is transformed into a multi-objective optimization problem by constructing a multi-objectiv...
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Morteza Ghanbarpour, Adrián Mota-Babiloni, Bassam E. Badran and Rahmatollah Khodabandeh
The phase-down of hydrofluorocarbons and substitution with low global warming potential values are consequences of the awareness about the environmental impacts of greenhouse gases. This theoretical study evaluated the energy and exergy performances and ...
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Andrei David, Brian Vad Mathiesen, Helge Averfalk, Sven Werner and Henrik Lund
The Heat Roadmap Europe (HRE) studies estimated a potential increase of the district heating (DH) share to 50% of the entire heat demand by 2050, with approximately 25?30% of it being supplied using large-scale electric heat pumps. This study builds on t...
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Samuel Sami
A numerical simulation model for a novel concept of a hybrid composed of photovoltaic-thermal solar panels and a heat pump is presented. This concept was developed to assess the performance and energy conversion efficiency of the hybrid system used to pr...
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M. D. Hambarde,Ramakant Shrivastava,S.R. Thorat,O.P. Dale
Pág. 266 - 278
Due to higher ozone layer depletion potential of HCFC refrigerant, R22 which has been mostly used in house hold refrigeration will be phased out by 2020 as per Montreal Protocol and UNFCCC Regulations. R407C, a zeotropic refrigerant from HFC category is ...
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J.M. Belman-Flores, Vicente Pérez-García, Jean Fulbert Ituna-Yudonago, José Luis Rodríguez-Muñoz, José de Jesús Ramírez-Minguela
Carbon dioxide is an innocuous refrigerant for the environment. It is a substance of current interest in the refrigeration area. Its good thermodynamic and heat transfer properties have placed it in an excellent position for substituting refrigerants tha...
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Magdalena Piasecka, Beata Maciejewska and Pawel Labedzki
Even though two-phase heat transfer of refrigerants in minichannel heat sinks has been studied extensively, there is still a demand for improvements in overall thermal performance of miniature heat transfer exchangers. Experimental investigation and soph...
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Liping Zeng, Xing Liu, Quan Zhang, Jun Yi, Xianglong Liu and Huan Su
This paper deals with the heat transfer performance of a micro-channel backplane heat pipe air conditioning system. The optimal range of the filling rate of a micro-channel backplane heat pipe air conditioning system was determined in the range of 65?75%...
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Victoria Tarasova,Mikhail Kuznetsov,Dionis Kharlampidi,Andrey Kostikov
Pág. 45 - 56
The study addresses the development of a method for the optimal design of vacuum-evaporative heat pump plants (HPP) for a cooling system of technological equipment of the second circuit at a nuclear power plant (NPP) using modern methods of thermodynamic...
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Nusrat Parveen, Sadaf Zaidi and Mohammad Danish
Environmental friendly refrigerants with zero ozone depletion potential (ODP) and zero global warming potential (GWP) are in great demand across the globe. One such popular refrigerant is isobutane (R600a) which, having zero ODP and negligible GWP, is co...
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Florian Heberle and Dieter Brüggemann
We present a thermo-economic evaluation of binary power plants based on the Organic Rankine Cycle (ORC) for geothermal power generation. The focus of this study is to analyse if an efficiency increase by using zeotropic mixtures as working fluid overcomp...
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Tatenda J. Bvumbe, Freddie L. Inambao
The demand for air conditioning is increasing due to changing architectural trends and increased standards of living and indoor comfort conditions. Coupled to this, refrigerants used in conventional refrigeration systems have detrimental effects on the e...
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