Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology.

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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….

Rankine Cycle with Organic Mixtures : Component Layout

ORC with mixtures

T-s plane for mixtures of R22/R114

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.

Hexamethyldisiloxane (MM) Molecular Structure Molecular FormulaC 6 H 18 OSi 2 Molecular Weight Properties Density0.764 Melting point-59 ºC Boiling point101 ºC Refractive index Flash point-1 ºC Water solubilityinsoluble

Decamethyltetrasiloxane (MD2M) Molecular Structure Molecular FormulaC 10 H 30 O 3 Si 4 Molecular Weight Properties Density0.854 Melting point-68 ºC Boiling point194 ºC Refractive index1.389 Flash point62 ºC

saturation curves in the T-x plane for the MM/MD2M mixture x MM

T-s diagram for MM (50%)/MD2M (50%)

Simple Rankine Cycle with Organic Mixtures

T-s plane for mixtures of MM/ND2M

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.

Supercritical cycles

Kalina Cycle with Subcooler

Effect of turbine inlet pressure on first law efficiency

The Superheat Kalina Cycle

Comparison of Exergy destruction in various components of the Ammonia water cycles