Biomass and geothermal based ORC along with solar ORC with storage system can be considered as
renewable resources in an acceptable cost to produce power. Waste heat recovery opportunities same
as, waste heats in steel, cement, oil and gas, glass and vehicles industries and internal combustion
engines are strongly recommended. Micro scale ORCs as modular units in home and office usages,
remote areas power generation for about 2 billion people who do not have grid connected electricity in
addition to solar desalination micro units and ORC in ocean thermal energy conversion are proven to be
interesting applications of micro ORCs. ORC as bottoming cycle of recuperative or high pressure ratio gas
turbines, micro gas turbines and fuel cells are also considered as other cost effective options. Moreover,
it was shown that using ORC in combination with cooling and heating systems will improve the
performance and decrease the cost of system. From computer model it was concluded that degree of
superheats, evaporator and condenser pressures, fluid type and mass flow rates on ORC, heat sources
and heat sinks sides, pumps efficiency, turbine types, etc, have significant effect on ORC performance
and cost.