Results 51 to 60 of about 1,212 (176)

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

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

Energy exergy and entropy analysis with R1234yf as an alternate refrigerant to R134a of automobile a

Journal of Thermal Engineering
A major portion of the worldwide emissions arise from mobile air-conditioning systems with hydrofluorocarbon refrigerant as working substance and which is one of major cause for the greenhouse effect.
Bhaveshkumar PATEL, Ashok PAREKH
doaj   +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

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

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

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

Utilizing Synergistic Effect in Pd‐Doped Mesoporous γ‐Al2O3/SnO2 for Multiple Freon Refrigerant Gases Detection

Advanced Sensor Research, Volume 4, Issue 9, September 2025.
Due to the synergistic effect of improved catalytic decomposition mechanism and Schottky‐barrier effect, the Pd‐γ‐Al2O3/SnO2 sensor exhibits outstanding response, good stability, selectivity, repeatability, and universality in sensing different Freon gases, which demonstrates its potential for use in Freon refrigeration leakage detection.
Jiahong Wen, Yaxin Wang, Ruoning Chu, Jinhai Li, Ze Chen, Yongjun Zhang, Xiaoyu Zhao, Qi‐Qi Fu   +7 more
wiley   +1 more source

Exploring Low‐Global Warming Potential Refrigerants for Medium‐Charge Systems

Energy Technology, Volume 13, Issue 9, September 2025.
This study evaluates 15 low‐global warming potential (GWP) refrigerants as alternatives for medium‐charge systems, focusing on environmental impacts, operational performance, and system design integration. Key findings reveal R‐447A's suitability for standard climates and R‐454B's advantages in high ambient conditions, providing actionable guidance for
Fadi Alsouda, Nick S. Bennett, Suvash C. Saha, Mohammad S. Islam   +3 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