Results 11 to 20 of about 1,918 (181)

Investigation of the Interactions between Refrigerant, Flowsheet, and Compressor in Residential Heat Pumps

Energy Technology, Volume 11, Issue 2, February 2023., 2023
The interdependencies of the refrigerant, flowsheet, compressor, and operating point are evaluated for residential heat pumps. The study shows that the optimal refrigerant strongly depends on the flowsheet and the compressor modeling approach.
Christoph Höges, Dennis Roskosch, Jona Brach, Christian Vering, Valerius Venzik, Dirk Müller   +5 more
wiley   +1 more source

A review of refrigerant R1234ze(E) recent investigations [PDF]

Applied Thermal Engineering, 2016
The authors thankfully acknowledge the “Ministerio de Educación, Cultura y Deporte” (Grant Number FPU12/02841) for supporting this work through “Becas y Contratos de Formación de Profesorado Universitario del Programa Nacional de Formación de Recursos Humanos de Investigación del ejercicio 2012”.
Adrián Mota-Babiloni, Joaquín Navarro-Esbrí, Francisco Molés, Ángel Barragán Cervera, Bernardo Peris, Gumersindo Verdú   +5 more
openaire   +3 more sources

Parametric Evaluation of the Flow Boiling Heat Transfer Properties of R22 and R407c inside Horizontal Microfin Tube

International Journal of Energy Research, Volume 2023, Issue 1, 2023., 2023
The flow boiling heat transfer performance of R22 and R407c, in a microfin tube with a helix angle of 22° and an apex angle of 48°, was evaluated in a study. The study is aimed at investigating the impact of heat flux, mass flux, saturation temperature, and vapor quality on the heat transfer coefficient during flow boiling.
Sandipan Deb, Neeraj Kumar Vidhyarthi, Sagnik Pal, Ajoy Kumar Das, Debabrata Barik, Nagaraj Nandihalli   +5 more
wiley   +1 more source

Performance Improvement of OTEC‐ORC and Turbine Based on Binary Zeotropic Working Fluid

International Journal of Chemical Engineering, Volume 2023, Issue 1, 2023., 2023
In this paper, the composition of binary nonazeotropic working fluids is explored from the perspective of improving OTEC‐ORC efficiency, and the turbine is designed to accommodate with the working fluid. It is found that the OTEC‐ORC using a R152a/R32 mixture as the working fluid is significantly higher than the OTEC‐ORC thermal efficiency and system ...
Qingfen Ma, Jie Huang, Zezhou Gao, Hui Lu, Hongfeng Luo, Jingru Li, Zhongye Wu, Xin Feng, Maciej Jaskulski   +8 more
wiley   +1 more source

Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

Solar RRL, Volume 6, Issue 8, August 2022., 2022
Solar‐assisted heat pumps have the potential to increase the share of renewables in the energy systems and the flexibility of smart grids. An assessment covering technical, economic, and social aspects is given to allow a holistic overview on the application of such systems.
Valeria Palomba, Giuseppe E. Dino, Andrea Frazzica   +2 more
wiley   +1 more source

Fundamentals, Thermophysical Properties, and Heat Transfer Characteristics of Nanorefrigerants: A Review

Journal of Nanomaterials, Volume 2022, Issue 1, 2022., 2022
Cooling applications that utilize latent heat property of fluids involve large heat transfer and throw more space for energy conservative research studies. Heating ventilation air‐conditioning and refrigeration systems, which have now grown as an integral part in human life, circulate refrigerants and necessitate developments to become energy‐efficient.
M. Feroskhan, T. Venugopal, Naif Mana Almakayeel, T. M. Yunus Khan, Saleh Alghamdi, Ali Saeed Almuflih, N. Gobinath, Samson Jerold Samuel Chelladurai   +7 more
wiley   +1 more source

Flow boiling heat transfer of R134a and low GWP refrigerants in a horizontal micro-scale channel [PDF]

, 2017
The present paper presents an investigation of the effects of the refrigerant type on the heat transfer coefficient during flow boiling inside micro-scale channels.
Abernethy, Anwar, Basu, Bertsch, Blasius, Calm, Chen, Choi, Chávez, Cioncolini, Copetti, Costa-Patry, Daniel Felipe Sempértegui-Tapia, de Oliveira, Del Col, Del Col, Dittus, Gherhardt Ribatski, Gnielinski, Gungor, Huang, Kalani, Kandlikar, Kanizawa, Kanizawa, Kew, Kim, Kim, Lazarek, Li, Li, Liu, Mahmoud, Mortada, Mota-Babiloni, Müller-Steinhagen, Oh, Oh, Saitoh, Saitoh, Sempértegui-Tapia, Sempértegui-Tapia, Siegel, Stephan, Sun, Taylor, Thome, Tibiriçá, Tibiriçá, Tibiriçá, Tran, Warrier, Zhang, Zivi   +53 more
core   +1 more source

Optimisation of a high-efficiency solar-driven organic rankine cycle for applications in the built environment [PDF]

, 2018
Energy security, pollution and sustainability are major challenges presently facing the international community, in response to which increasing quantities of renewable energy are to be generated in the urban environment.
Chatzopoulou, Maria Anna, Freeman, James, Ramos Cabal, Alba   +2 more
core   +2 more sources

Convective condensation of R134a and R1234ze(E) inside microfin tube

Journal of Physics: Conference Series, 2023
Abstract Environmental concerns are forcing the replacement of the commonly used refrigerants and finding new fluids is a top priority. The hydro-fluoro-olefin (HFO) R1234ze(E), because of its smaller global warming potential (GWP) and shorter atmospheric lifetime, replaced R134a.
Lucchini, A, Carraretto, I M, Phan, T N, Pittoni, P G, Molinaroli, L, Colombo, L P M   +5 more
openaire   +2 more sources

Refrigerant R32 as lower GWP working fluid in residential air conditioning systems in Europe and the USA [PDF]

, 2017
Because air conditioning and heat pump systems contribute greatly to greenhouse gas emissions, equipment with both lower global warming potential (GWP) working fluids and a higher level of performance should be used.
Makhnatch, Pavel, Moles, Fran, Mota-Babiloni, Adrián, Navarro-Esbrí, Joaquín   +3 more
core   +2 more sources