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Cost and environmental analysis and optimization of a new and green three-level waste heat recovery-based cogeneration cycle: A comparative study. [PDF]
HeliyonNikafshan Rad H, Ghasemi A, Marefati M.
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Vapor bubble growth in a zeotropic binary mixture
Thermophysics and Aeromechanics, 2021In the framework of the thermal energy scheme, the growth of a vapor bubble in a uniformly superheated zeotropic mixture of two liquids is investigated. Formulas are derived for the bubble growth modulus and the Jacob criterion, which depends both on the physical properties of the mixture and its composition.
S. P. Aktershev +2 more
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Modeling of In-Tube Condensation of Zeotropic Mixtures
Journal of Heat Transfer, 2016Studies in the literature have shown that zeotropic mixture condensation rates are lower than those predicted using a pure-fluid approach. This has been attributed to the decrease in fluid temperature that occurs with zeotropic mixtures and to the development of concentration gradients in the vapor-phase that limit the condensation heat transfer.
Malcolm Macdonald, Srinivas Garimella
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In-tube condensation of zeotropic fluid mixtures: A review
International Journal of Refrigeration, 2013Abstract The condensation of multi-component mixtures in tubes is critical to the function of many energy conversion processes. This paper reviews experimental and analytical studies of the coupled heat and mass transfer phenomena during condensation of different fluid mixtures in different in-tube geometries.
Brian M. Fronk, Srinivas Garimella
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Exergoeconomic Analysis of a Novel Zeotropic Mixture Power System
International Journal of Precision Engineering and Manufacturing-Green Technology, 2020A parametric investigation of a novel ammonia water mixture power generation system is performed in this study. The overall performance and feasibility of the system of the proposed system are assessed from thermoeconomic, conventional exergy and advanced exergy perspectives.
N. Shankar Ganesh +3 more
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Nucleate Pool Boiling of Binary Zeotropic Mixtures
Heat Transfer Engineering, 2004This 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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Calculating Circulation Concentration of Zeotropic Refrigerant Mixtures
HVAC&R Research, 1995The circulation concentration of a zeotropic refrigerant mixture may differ from the refrigerant bulk concentration in a vapor compression cycle. The difference, defined as “concentration shift,” is mainly caused by the differential holdup in two-phase regions and the differential solubility of the oil.
J. Chen, H. Kruse
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Composition Optimization of Zeotropic Mixtures for ORC Systems Considering Constraints
2021Organic 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 +2 more
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