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Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology Delhi Customized Solutions for Maximum Benefits….
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Rankine Cycle with Organic Mixtures : Component Layout
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ORC with mixtures
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T-s plane for mixtures of R22/R114
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Mixtures of Organic Working Fluids A siloxane is any chemical compound composed of units of the form R 2 SiO, where R is a hydrogen atom or a hydrocarbon group. Si They belong to the wider class of organosilicon compounds. Hexamethyldisiloxane is a chemical compound with the formula O[Si(CH 3 ) 3 ] 2.
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Hexamethyldisiloxane (MM) Molecular Structure Molecular FormulaC 6 H 18 OSi 2 Molecular Weight162.38 Properties Density0.764 Melting point-59 ºC Boiling point101 ºC Refractive index1.3765-1.3785 Flash point-1 ºC Water solubilityinsoluble
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Decamethyltetrasiloxane (MD2M) Molecular Structure Molecular FormulaC 10 H 30 O 3 Si 4 Molecular Weight310.68 Properties Density0.854 Melting point-68 ºC Boiling point194 ºC Refractive index1.389 Flash point62 ºC
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saturation curves in the T-x plane for the MM/MD2M mixture x MM
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T-s diagram for MM (50%)/MD2M (50%)
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Simple Rankine Cycle with Organic Mixtures
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T-s plane for mixtures of MM/ND2M
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Superheat Cycles For heat exploitation at comparatively high temperature, a saturated cycle requires a working fluid with a very high critical temperature which implies an unrealistically low condensation pressure.
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Supercritical cycles
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Kalina Cycle with Subcooler
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Effect of turbine inlet pressure on first law efficiency
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The Superheat Kalina Cycle
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Comparison of Exergy destruction in various components of the Ammonia water cycles
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