A waste heat recovery cycle explained A waste heat recovery system extracts thermal power from the exhaust gas of the industrial plant to feed the ORC module via the intermediate fluid. This fluid, usually oil, pressurized water or steam, transfers heat to the organic fluid in the ORC evaporator, where it vaporizes.

The quantity or the amount of available waste heat can be calculated using the equation shown below. (1) Q = V × ρ × C P × Δ T where, Q (J) is the heat content, V is the flowrate of the substance (m³/s), ρ is density of the flue gas (kg/m³), C_p is the specific heat of the substance (J/kg.

Steam-Fired Water Heating Low-pressure steam can be used to make hot water for process or domestic use. If the supply of steam from a waste heat source is not continuous, the supplied steam can be kept constant by using a supplemental steam valve. TLV's steam-fired water heater, SteamAqua®, is a typical example.

ABB's Waste Heat Recovery System (WHRS) is designed to recover much of the standard heat and friction energy losses. This means fuel efficiency improves, auxiliary engines can be used less and less CO2 will be released.