Results 141 to 150 of about 1,682,876 (216)

Thermodynamic feasibility evaluation of an innovative salinity gradient solar ponds-based ORC using a zeotropic mixture as working fluid and LNG cold energy

Applied Thermal Engineering, 2021
Thermodynamic feasibility evaluation is investigated for a salinity gradient solar pond-based power generation system. A dual-pressure evaporation organic Rankine cycle using the zeotropic mixture as working fluid is employed for power generation.
A. Mosaffa, L. G. Farshi
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 ...
openaire   +1 more source

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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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
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Modeling of Two-Phase Heat Exchangers With Zeotropic Fluid Mixtures

Journal of Heat Transfer, 2018
Heat exchangers are important components in many engineering applications. This paper proposes a numerical two-phase heat exchanger model with simultaneous heat transfer and pressure drop calculations. The presented model provides a modeling framework compatible with numerous different correlations for both single- and two-phase flow of pure fluids and
Gomse, D., Kochenburger, T. M., Grohmann, S.   +2 more
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Review on Applications of Zeotropic Mixtures

Journal of Thermal Science, 2022
Mengjie Bai, Li Zhao, Ruikai Zhao
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Zeotropic mixture active design method for organic Rankine cycle

Applied Thermal Engineering, 2018
Abstract Using mixture working fluids has been proven to be an effective way to improve the performance of organic Rankine cycles (ORC). Instead of recommending mixtures or compositions for a specific heat source, this work is focused on providing preliminary design guidelines of zeotropic mixture working fluids for ORC.
Huixing Zhai, Qingsong An, Lin Shi
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Heat pump control with zeotropic mixtures

1999
Zeotropic mixtures offer the possibility of being changed in composition by rectification methods which can be applied to the control of heat pump systems. Cycle calculations were done with various fluids commercially available in order to find the best mixture combination under the aspect of a wide control range as well as of a maximum achievable COP.
Halm NP, Kruse H, Bobbo S, Camporese R
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