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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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Page 1: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Advanced Power Generation Cycles Using Multi Component Working Fluids

P M V SubbaraoProfessor

Mechanical Engineering DepartmentIndian Institute of Technology Delhi

Customized Solutions for Maximum Benefits….

Page 2: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Rankine Cycle with Organic Mixtures : Component Layout

Page 3: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

ORC with mixtures

Page 4: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

T-s plane for mixtures of R22/R114

Page 5: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Mixtures of Organic Working Fluids

• A siloxane is any chemical compound composed of units of the form R2SiO, where R is a hydrogen atom or a hydrocarbon group.

• They belong to the wider class of organosilicon compounds.

• Hexamethyldisiloxane is a chemical compound with the formula O[Si(CH3)3]2.

http://en.wikipedia.org/wiki/Silicon

Page 6: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Hexamethyldisiloxane (MM)

Molecular Structure

Molecular Formula C6H18OSi2

Molecular Weight 162.38

Properties

Density 0.764Melting point -59 ºC

Boiling point 101 ºC

Refractive index 1.3765-1.3785

Flash point -1 ºCWater solubility insoluble

Page 7: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Decamethyltetrasiloxane (MD2M)

Molecular Structure

Molecular Formula C10H30O3Si4

Molecular Weight 310.68

Properties

Density 0.854

Melting point -68 ºC

Boiling point 194 ºC

Refractive index 1.389

Flash point 62 ºC

Page 8: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

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

xMM

Page 9: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

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

Page 10: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Simple Rankine Cycle with Organic Mixtures

Page 11: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

T-s plane for mixtures of MM/ND2M

Page 12: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

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.

Page 13: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Supercritical cycles

Page 14: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Kalina Cycle with Subcooler

Page 15: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

Effect of turbine inlet pressure on first law efficiency

Page 16: Advanced Power Generation Cycles Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology

The Superheat Kalina Cycle

Page 17: 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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