How Heat to Energy Works
The technology uses an organic fluid to absorb the waste heat exiting the exhaust stack of the gas turbine via a heat exchanger. The fluid is circulated from the exhaust heat exchanger to the skid mounted ORC unit. A second heat exchanger then allows the heat to be transferred from the fluid to a closed loop gas circuit, which expands when heated.
The applications are wide and varied, and include many industrial applications where waste heat is generated and vented to the atmosphere, including industrial kilns, combustion engine exhaust stacks, biomass, geothermal, glass industries, refineries etc.
The energy within the expanded gas is then used to drive the generator, via an expander, producing electrical energy at 11KV.
The energy depleted expanded gas is then circulated through a cooling loop (air cooled or water cooled condenser) to the skid mounted exchanger to begin the cycle again.
A step change has occurred in recent times to increase the MW output of the skid mounted ORC unit to a utility sized product of up to 15MW. This now opens the door to replace conventional water consuming combined cycle gas turbine power plants solutions, and all of their difficulties, with a much simpler ORC solution for both light and heavy industrial gas turbines.