Results 41 to 50 of about 271 (169)

Thermo-economic analysis of working fluids for a ground source heat pump for domestic uses

Case Studies in Thermal Engineering, 2021
Ground source heat pump, due to high coefficient of performance (COP) and use of low-temperature thermal energy source, is one of the best technologies to use renewable energy resources.
Mohammadreza Pishkariahmadabad, Hamdi Ayed, Wei-Feng Xia, Yashar Aryanfar, Abdulaziz M. Almutlaq, Belgacem Bouallegue   +5 more
doaj   +1 more source

Energy, Exergy and Economic Evaluation Comparison of Small-Scale Single and Dual Pressure Organic Rankine Cycles Integrated with Low-Grade Heat Sources

Entropy, 2017
Low-grade heat sources such as solar thermal, geothermal, exhaust gases and industrial waste heat are suitable alternatives for power generation which can be exploited by means of small-scale Organic Rankine Cycle (ORC). This paper combines thermodynamic
Armando Fontalvo, Jose Solano, Cristian Pedraza, Antonio Bula, Arturo Gonzalez Quiroga, Ricardo Vasquez Padilla   +5 more
doaj   +1 more source

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

Exergy analysis of organic Rankine cycle for waste heat recovery using low GWP refrigerants

International Journal of Thermofluids, 2022
The use of exergy analysis in thermodynamic systems, as well as energy analysis, is quickly increasing. Exergy analysis is useful for identifying processes that cause exergy destruction and losses, and it may be used in conjunction with energy analysis ...
Abrar E Elahi, Tahir Mahmud, Mahmodul Alam, Jahangir Hossain, Bapti Niloy Biswas   +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

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

Molecular Simulations of Adsorption and Thermal Energy Storage of Mixed R1234ze/UIO‐66 Nanoparticle Nanofluid

Journal of Nanomaterials, Volume 2019, Issue 1, 2019., 2019
In the process of adsorption and separation of fluid molecules on the solid surface of porous nanomaterials, the mutual transformation of thermal energy and surface energy can improve the heat absorption and energy utilization efficiency of circulating working medium.
Qiang Wang, Shengli Tang, Sen Tian, Xiaojian Wei, Tiefeng Peng, Jean M. Greneche   +5 more
wiley   +1 more source

Comparative analysis on the life cycle climate performance of ground source heat pump using alternative refrigerants

Case Studies in Thermal Engineering, 2023
The ground source heat pump (GSHP) system is receiving increasing interest because of its potential to increase energy efficiency and thus reduce greenhouse gas emissions.
Fang Wang, Tian You
doaj   +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

Effect of Condenser Fouling on Performance of Vapor Compression Refrigeration System

Journal of Thermodynamics, Volume 2015, Issue 1, 2015., 2015
Effect of condenser fouling is evaluated on the performance of a vapour compression system with refrigerants HFO1234yf and HFO1234ze as an alternative to HFC134a. The condenser coolant temperature has been varied between 35 and 40°C to evaluate the effect of fouling at different condenser temperatures.
Naveen Solanki, Akhilesh Arora, S. C. Kaushik, Shripad T. Revankar   +3 more
wiley   +1 more source