Results 131 to 140 of about 1,680,915 (216)

Nucleate Pool Boiling of Binary Zeotropic Mixtures

Heat Transfer Engineering, 2004
This article deals with an experimental study of pool boiling of acetone/water and propane/isobutane zeotropic mixtures. Water and acetone form non-ideal mixtures characterized by a very wide phase equilibrium diagram. Propane and isobutane, which are alkanes with very close thermophysical properties, form nearly ideal mixtures. The whole nucleate pool
SERGE CIOULACHTJIAN, MONIQUE LALLEMAND
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Refinery Boiler Flue Gas Evaluation on Assessed Subcritical Organic Rankine Cycle (SORC) by Applying R1234ze(E), R1234yf, and R134a Pure and Zeotropic Mixtures

Heat Transfer
The Organic Rankine Cycle (ORC) has gained widespread adoption in recent decades due to its efficiency in converting medium‐temperature heat sources into power.
O. Rowshanaie, M Z M Tohir, H. Rowshanaie   +2 more
semanticscholar   +1 more source

A Generalized Non-Equilibrium Film Theory Heat Transfer Model for Annular Flow Condensation of Binary Zeotropic Mixtures

ASME 2025 Heat Transfer Summer Conference
Zeotropic mixtures are widely used alternatives to pure fluids due to their favorable thermodynamic properties, environmental benefits, and regulatory compliance.
M. Eissa, Liping Liu, Sophie Wang
semanticscholar   +1 more source

Performance optimization and experimental investigation of ORC system using binary zeotropic mixtures

Journal of Energy Resources Technology, Part A: Sustainable and Renewable Energy
This study proposes a novel optimization method to enhance the behavior of organic Rankine cycle (ORC) systems through utilizing zeotropic mixtures with temperature glide characteristics.
Xinling Ma, Mengyue Chen, Qifei Lian, Lei Wang, Xiangrui Meng, Xin Wei   +5 more
semanticscholar   +1 more source

Zeotropic Mixture and Organic Ranking Cycle

2016
The Intergovernmental Panel on Climate Change (IPCC) reported in 2014 that scientists were more than 95 % certain that most of global warming is caused by increasing concentrations of greenhouse gases [1]. Since the Second Industrial Revolution, steam Rankine cycle driven by fossil fuel has become the dominant method of power supply, and the ...
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Distillation trajectories for the first-class fractionation of zeotropic mixtures

Theoretical Foundations of Chemical Engineering, 2011
Phase portraits of distillation trajectories for first-class fractionation are considered for three-component mixtures, including the case of the feed composition belonging to an α = 1 manifold.
L. A. Serafimov, A. V. Timoshenko, K. Yu. Tarkhov   +2 more
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Composition Optimization of Zeotropic Mixtures for ORC Systems Considering Constraints

2021
Organic Rankine Cycle (ORC) processes are used to convert low-temperature waste heat into electricity. Often, these sources and sinks are sensible heat flows. In such a case, it may be appropriate to adapt the cycle process to these external temperature characteristics. This can be realized with zeotropic mixtures as a working fluid and evaluated by an
Bederna, Benedikt Gregor, Barta, Riley Bradley, Hesse, Ullrich   +2 more
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Occurrence of pinch points in condensers and evaporators for zeotropic refrigerant mixtures

International Journal of Refrigeration, 1996
Abstract Many zeotropic refrigerant mixtures are being proposed as alternatives to some CFCs and HCFCs. One of the advantages of zeotropes is the possibility of reduction in entropy generation by matching the temperature glides of refrigerant and heat-transfer fluid in both condenser and evaporator. However, perfect glide matching may not be possible
G Venkatarathnam, Girish Mokashi, S.Srinivasa Murthy   +2 more
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Comparative double and integer optimization of low-grade heat recovery from PEM fuel cells employing an organic Rankine cycle with zeotropic mixtures

, 2021
In the present study, a comparative optimization analysis of a hydrogen-based proton exchange membrane (PEM) fuel cell integrated with an organic Rankine cycle (ORC) using twenty different zeotropic mixtures is accomplished.
I. Fakhari, Amirmohammad Behzadi, E. Gholamian, P. Ahmadi, A. Arabkoohsar   +4 more
semanticscholar   +1 more source

Flow Boiling of Zeotropic Refrigerant Mixture R456a in Microchannels

ASME 2024 7th International Conference on Micro/Nanoscale Heat and Mass Transfer
Abstract Zeotropic refrigerant mixtures are widely considered as the alternatives to refrigerants currently used in vapor-compression refrigeration systems for the purpose of lowering GWP. Microchannel heat exchangers prove to be highly efficient and compact.
Yu Xia, Dilara Suulker, Zhen Long, Hua Sheng Wang   +3 more
openaire   +1 more source