This is my basic micro ORC concept to be developed as DIY project.

www.scoop.it/t/organic-rankine-cycle
www.microgenerationconcepts.com/

ORC converts low temperature heat to mechanical work for generatig elecricity.
The simple ORC consists from 5 basic components: see below.
ORC schematic.jpg

E-HX - Evaporator heatexchanger
TEX - Turboexpander
G - Generator
C-HX - Condenser heatexchanger
P - Pump