Results 61 to 70 of about 6,765 (186)

Energy, Exergy, Economic, and Environmental Assessment of a PTSC‐Assisted Low‐Temperature Geothermal ORC–PEM System for Enhanced Hydrogen and Hot Water Production

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This study evaluates a renewable‐energy‐based system consisting of 300 m2 of parabolic trough solar collectors (PTSCs), a low‐temperature geothermal source (62°C), an Organic Rankine Cycle (ORC) using R134a as the working fluid, and a proton exchange membrane (PEM) electrolyzer for hydrogen production.
Ayhan Atiz, Cheng Du
wiley   +1 more source

A Vapour Compression–Chemisorption System for Refrigeration and Cold Energy Storage in Warehouse Application

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Due to global warming caused by greenhouse gas emissions, cooling demand increases steadily globally. This rapidly increases the power demand for cooling from the electricity grid. Cold thermal energy storage (CTES) could shift the peak demand of cooling systems and thus ease the pressure on the grid.
Kaki Sarath Babu, Zhibin Yu, Sambhaji Kadam, Shrishti Thapliyal   +3 more
wiley   +1 more source

Performance comparison of DME and R134a refrigerants in a room air conditioner: Effect of subcool and superheat [PDF]

E3S Web of Conferences
The demand for environmentally friendly refrigerants arises to anticipate two global environmental issues: global warming and climate change. The use of environmentally friendly refrigerants is one of the efforts to address these issues.
Setyawan Andriyanto, Mitrakusuma Windy Hermawan, Simbolon Luga Martin   +2 more
doaj   +1 more source

Energy and Exergy Analysis of a Gas‐Cooled Nuclear Reactor System for Sustainable Hydrogen Generation

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This study presents a comprehensive energy and exergy analysis of a multigeneration system driven by the waste thermal energy of a modular high‐temperature nuclear reactor. The proposed configuration simultaneously delivers electricity, liquid hydrogen (H2), freshwater (FW), heating, and cooling.
Murat Koc, Denis Osinkin
wiley   +1 more source

Small‐Scale Milk Pasteurization and Chilling Using Hybrid Solar–Thermal and Photovoltaic Systems for Off‐Grid Areas

International Journal of Photoenergy, Volume 2026, Issue 1, 2026.
Due to the lack of access to grid electricity, milk preservation is a significant challenge in pastoral and rural areas of most African countries, despite the large volume of milk produced. Integrating milk pasteurization and chilling with a hybrid solar–thermal and photovoltaic system can enhance milk preservation, enabling milk to reach the market ...
Fikadu Geremu Bodena, Demiss Alemu Amibe, Ole Jorgen Nydal, Trygve Magne Eikevik, K. R. Justin Thomas   +4 more
wiley   +1 more source

Two-Phase Flow Development of R134a in a Horizontal Pipe: Computational Investigation

, 2021
To improve the performance of vapor compression refrigeration systems that use vertical gravitational flash tank separators, the liquid separation efficiency of the vertical gravitational flash tank separator requires to be approved.
Saleh, Khalid, Sharifian-Barforoush, Ahmad, Abdulkareem, Lokman A., Musa, Veyan A., Massoud, Enass, Mahmood, Raid A.   +5 more
core   +1 more source

Flow patterns and heat transfer for flow boiling in small to micro diameter tubes [PDF]

, 2008
An overview of the recent developments in the study of flow patterns and boiling heat transfer in small to micro diameter tubes is presented. The latest results of a long-term study of flow boiling of R134a in five vertical stainless steel tubes of ...
Karayiannis, TG, Shiferaw, D, Kenning, DBR, Wadekar, VV   +3 more
core   +4 more sources

Characteristics of Enhanced Heat Transfer of Nanofluid in Microchannels Under Electric and Magnetic Co‐Excitation

Asia-Pacific Journal of Chemical Engineering, Volume 20, Issue 6, November/December 2025.
ABSTRACT Due to its small size, microchannel heat exchangers are widely used in fine engineering fields such as electronic equipment. In this paper, the boiling heat transfer characteristics of refrigerants and nanofluids in microchannels are studied by applying electric fields, magnetic fields, and electromagnetic synergistic fields.
Yanyu Wu, Kai Cui, Mingshuai Qiao, Zhiguo Zhang, Yaode Li   +4 more
wiley   +1 more source

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

Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2020
Küresel ısınma Dünya gündeminin ana konularından birisidir. Dolayısıyla, soğutucu akışkanların çevresel etkilerini azaltmak için birçok çalışma ve düzenleme yapılmaktadır.
Abdullah Yıldız, Ragıp Yıldırım
doaj   +1 more source

Multi‐Objective Optimization of a Climate‐Responsive Green Hydrogen‐Based Multi‐Generation System with Advanced Energy Storage and Heat Recovery

Advanced Sustainable Systems, Volume 9, Issue 10, October 2025.
A novel hydrogen‐based multi‐generation system integrates CAES, PEME, and ORC for climate‐responsive power generation. Using response surface methodology, the system is optimized for energy efficiency, emissions, and cost. Results highlight its strong performance in temperate climates and its potential for modular, scalable deployment.
Ehsanolah Assareh, Mohtada Sadrzadeh, Nima Izadyar, Elmira Jamei, Saleh Mobayen, Mehrdad Ahmadinejad   +5 more
wiley   +1 more source