Results 51 to 60 of about 6,765 (186)

Techno‐Economic Analysis of Hydrocarbon‐CO2 Binary Mixtures in Heat Pump‐Based Thermal Energy Storages

Energy Technology, Volume 14, Issue 4, April 2026.
Heat‐pump charging of Carnot batteries with zeotropic large temperature glide CO2–alkane mixtures enables charging from ambient to ≈398.15 K with improved heat‐exchanger temperature matching at moderate pressure ratios. The highest COP occurs near xCO2 ≈ 0.15, whereas cost and throttling losses rise monotonically with CO2 content; butane isomers ...
Majid Zarif Sabbaghnia, Burak Atakan
wiley   +1 more source

Review and Potential Analysis of R1234yf Heat Pump Technology

Zhileng xuebao, 2020
Electric vehicles do not have sufficient engine waste heat to meet heating demands in winter. As such, heat pump technology has become a research hotspot to achieve a higher efficiency than electric resistance heat.
Liu Yusheng, Li Wanyong, Shi Junye, Chen Jiangping   +3 more
doaj  

Drop-In Replacement of R134a in a Household Refrigerator with Low-GWP Refrigerants R513A, R516A, and R1234ze(E)

Energies, 2023
This study proposes the experimental evaluation of alternative refrigerants with low global warming potentials (GWPs) such as R1234ze(E), R513A, and the mixture R516A as a drop-in replacement for R134a in a domestic refrigerator with a volumetric ...
Juan M. Belman-Flores, Yonathan Heredia-Aricapa, Juan J. García-Pabón, Vicente Pérez-García, César G. Pérez-Reguera   +4 more
doaj   +1 more source

Performance Investigation of Eco‐Friendly Refrigerant Mixtures as an Alternative to R134a in Vapour‐Compression Refrigeration System

Asia-Pacific Journal of Chemical Engineering, Volume 21, Issue 2, March/April 2026.
ABSTRACT The growing impacts of climate change and energy scarcity demand environmentally sustainable refrigeration solutions. This study investigates eco‐friendly refrigerants (R152a, R290 and R600a) and their optimized ternary mixture as alternatives to R134a. Four blend compositions were analysed using experimental testing and REFPROP 10.0 modelling
M. Periyasamy, P. Senthilkumar
wiley   +1 more source

Thermally Optimized Engineering of a Battery Pack for Racing Cars

Battery Energy, Volume 5, Issue 2, March 2026.
A time‐dependent CFD analysis compares six cooling architectures for a Formula student Li‐ion battery pack built on a metallic finned frame. A multi‐parametric single‐objective function merges thermal and structural metrics to identify the optimal trade‐off between performance and compactness, highlighting the potential of hybrid liquid–PCM systems ...
Nicolò Zatta, Ibrahim Mahfouz, Andrea Trovò, Massimo Guarnieri   +3 more
wiley   +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

ِA simulation of effect the change in capillary tube diameter on a compression refrigeration system performance [PDF]

Kirkuk Journal of Science, 2012
A simulation compression refrigeration system study was presented in this research depending on the change of the capillary tube diameter and using the refrigerants (R134a, R12, R500 and R152a).
Tamir K. Salim, Samer M. Khalaf, Saad S. Farhan   +2 more
doaj   +1 more source

Optimized Solar Tower Multigeneration System With Integrated Rankine, ORC, Kalina, and Absorption Cycles: Thermodynamic Analysis and MOAVOA–MADDPG Optimization

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This study presents a novel next‐generation solar‐tower multigeneration plant that integrates a heliostat field with molten‐salt thermal‐energy storage (TES), a triple‐pressure reheat Rankine cycle, an organic Rankine cycle (ORC) using isobutane, a Kalina cycle with ammonia–water mixture, a single‐effect LiBr‐water absorption chiller, a vapor ...
Seyed Saeed Razavian, Mojtaba Babaelahi
wiley   +1 more source

Surface effects in flow boiling of R134a in microtubes [PDF]

, 2011
This is the post-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2011 ElsevierThe inner surfaces of microtubes may be influenced strongly by the process of making them due to manufacturing ...
Tassos G. Karayiannis, Mohamed M. Mahmoud, Mahmoud, MM, Karayiannis, TG, David B.R. Kenning, Kenning, DBR   +5 more
core   +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