ORC-Cycle

Why are organic fluids used in ORC processes?  

• Due to their high stability

• Vapor is generated at low temperatures

• Are not flammable

• High efficiencies are achieved

What component is needed for the isentropic expansion? 

• Pump 

• Evaporator

• Turbine

• Condenser

What efficiencies are achieved with conventional ORC processes?  

• 13-16% 

• 20-25%

• 33-36%

• 3-6%

Which temperature range is usable for the heat source?  

• 10-60 °C 

• Appr. 120 °C 

• 100-350 °C 

• 600-900 °C 

Where does most of the energy go?  

• Electrical energy 

• Thermal energy  

• Thermal and electrical loses 

• Radiation and conversion lost 

How much is an ORC-fluid superheated? 

• 200K 

• 500K 

• 100K 

• A few Kelvin 

What is the advantage of the negative slope of the steam curve of ORC-fluids? 

• More energy can be produced than with steam. 

• Expansion ends in the superheated area. 

• Superheating is only needed twice. 

• It’s more beautiful. 

What is Not a characteristic of organic fluids?

• can be harmful to the environment

• may decompose

• may self-ignite

• can be used at high temperatures  

Do you now have knowledge about the ORC cycle after this presentation? 

• Yess, absolutely! 

• No, I fell asleep

• Yes, I know everything about monsters like goblins now  

• No, I was not listening