Results 51 to 60 of about 3,003 (225)

Candidate eco-friendly gas mixtures for MPGDs [PDF]

, 2018
Modern gas detectors for detection of particles require F-based gases for optimal performance.Recent regulations demand the use of environmentally unfriendly F-based gases t o be limited or banned. This review studies properties of potential eco-friendly
Ban, Y., Benussi, L., Bianco, S., Chen, G., Colafranceschi, S., Ferrini, M., Grassini, S., Kjolbro, J., Li, Q., Muhammad, S., Parvis, M., Piccolo, D., Saviano, G., Sharma, A., Yang, D.   +14 more
core   +1 more source

Exploratory Study on Carbon Dioxide Blends With Low‐GWP Working Fluids for Medium and High‐Temperature Heat Pumps Under Step Pressure

Asia-Pacific Journal of Chemical Engineering, Volume 21, Issue 1, January/February 2026.
ABSTRACT This study investigates binary zeotropic mixtures of R744 (CO₂) blended with eco‐friendly refrigerants for medium‐high temperature heat pumps, comparing them with conventional R744/R134a systems. All mixtures meet 60–80 K temperature lift requirements under low‐temperature conditions. A genetic algorithm optimized system parameters using fixed
Lingling Sun, Qixiong Tang, Huirong Wang, Xin Wang, Linlin Li, Rui Cheng, Kunfeng Liang   +6 more
wiley   +1 more source

Evaluación experimental del Isobutano (R600a) como substituto del R134a en instalaciones de compresión simple de vapor que utilizan compresores herméticos [PDF]

, 2015
Treball Final de Grau en Enginyeria Mecànica. Codi: EM1047. Curs: 2014/2015El ser humano lleva miles de años desarrollando, inventando y construyendo centenares de proyectos tecnológicos, desde pequeñas herramientas de mano hasta grandes rascacielos o ...
Orihuela Gracia, Aitor
core  

Cost Analysis and Optimization of Green Hydrogen Production via Concentrating Solar Technologies and PEM Electrolyzer

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
The burgeoning demand for power across the globe and the disastrous effect of climate change that results from power generation through depleting unclean fuel sources have necessitated the use of renewable and clean fuels. Hydrogen is a good alternative but only when produced from low‐carbon energy resources.
Terungwa Anthony Tivfa, Abdullahi Sani Shuaibu, Hussein A. Mohammed, Awad B. S. Alquaity, Obaidallah Munteshari, Semen Klyamkin   +5 more
wiley   +1 more source

Sustainable Thermal Solutions: Enhancing Heat Transfer with Turbulators and Nanofluids

Advanced Energy and Sustainability Research, Volume 6, Issue 5, May 2025.
Nanofluids, which are nanoparticle suspensions in base fluid, facilitate heat transmission due to their improved thermal conductivity. Turbulators, which are inserts into fluid flow channels, disturb the flow, increasing turbulence and hence the heat transfer rate.
Zafar Said, Aggrey Mwesigye, Lingala Syam Sundar, Arun Kumar Tiwari, Kalidasan Balasubramanian, Hafiz Muhammad Ali, Evangelos Bellos, Chaerin Gim, Mohammad Shamsuddin Ahmed, Jang‐Yeon Hwang   +9 more
wiley   +1 more source

Scroll compressor modelling for heat pumps using hydrocarbons as refrigerants

, 2013
International audienceHydrocarbons are today considered as promising alternatives to hydrofluorocarbons thanks to their low environmental impact and their easy implementation.
Byrne, Paul, Ghoubali, Redouane, Miriel, Jacques   +2 more
core   +4 more sources

Thermodynamic modelling and analysis of a solar organic Rankine cycle employing thermofluids [PDF]

, 2017
This paper presents thermodynamic modelling and simulation study of a small scale saturated solar organic Rankine cycle (ORC) which consists of a stationary, flat plate solar energy collector that is utilised as a vapour generator, a vane expander, a ...
Helvaci, H.U., Khan, Zulfiqar Ahmad
core   +1 more source

Energy and Exergy Efficiency Analysis of an Ejector‐Expansion Refrigeration Cycle Using the Working Fluid R134a and Its Potential Substitutes

Energy Science &Engineering, Volume 13, Issue 5, Page 2389-2400, May 2025.
ABSTRACT This paper proposes an ejector‐expansion refrigeration cycle (EERC) with two evaporating temperatures to recover partial expansion work and greatly reduces the throttling loss of the other expansion valve connected to the evaporator compared with the conventional bievaporator refrigeration cycle (CBEC).
Xiaoqin Liu, Weibin Wang, Jianyong Wang
wiley   +1 more source

Energy, exergy and exergoenvironmental assessments of waste heat operated basic and modified cogeneration systems for freshwater and hydrogen production

IET Renewable Power Generation, Volume 19, Issue 1, January/December 2025.
The performance of four different configurations of waste heat‐driven organic Rankine cycle (ORC) integrated with reverse osmosis and Proton exchange membrane electrolyser is modelled in the current study. The four configurations of ORC are the basic (BORC), with internal heat exchanger (HORC), with mixing chamber (MORC), and with both internal heat ...
Mohammad Waqas Chandio, Shafiq Ur Rehman Qureshi, Laveet Kumar, Abdul Ghafoor Memon   +3 more
wiley   +1 more source

Composition Change Characteristics of Non-azeotropic Mixturesof Auto- cascade Refrigeration System

Zhileng xuebao, 2016
The condensation process of non-azeotropic mixed refrigerant is a isobaric process. Meanwhile, the concentrations of vapor and liquid continuously change.
Rui Shengjun, Zhang Hua, He Tao, Luo Hao
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