Case study - Internal combustion engines and process heat-to-power application in Czech Republic


Courtesy of ElectraTherm

Breclav-Postorna, Czech Republic
Hot Water Temp:  88-92°C
Hot Water Flow:  10 l/s
KWth Average (Thermal Input): 600-750kWth
Cooling:  Cooling Tower
Cold Water Temp: 18-24°C
Cold Water Flow: 12-14 l/s
Green Machine Gross Output: Two machines at 25-33kWe each

ElectraTherm installed two Green Machines at FOSFA, a manufacturer of phosphoric acid and phosphates in the Czech Republic. The manufacturing plant has been in operation since 1884 and maintains a culture of en vironmental standards geared towards ensuring all waste is processed in the most efficient, environmentally-friendly way.

The manufacturing plant operates four 250kW internal combustion engines for onsite power. ElectraTherm’s Green Machines run in parallel with two of the engines, supplied by hot water from the jacket water and exhaust systems of the engines at 88-95°C.

The machines are cooled by a cooling tower the facility already uses for their chemical process. The cold water runs through the Green Machines at approximately 16-24°C.

Each of the two utilized IC engines are currently producing between 175-220kWe. The two Green Machines each generate close to 26kWe, increasing site efficiency and reducing the plant’s carbon footprint.

Green Machine power is fed back onto the grid and meets national feed-in tariff requirements for renewable energy.

“ORC technology complements the Czech Republic’s pursuit towards its national renewable portfolio goals because it utilizes a pre-existing heat source without the investment, environmental-footprint and risk often associated with other renewable technologies,” said Lokchandar Selvaraj, President of GB Consulting, ElectraTherm’s eastern European distributor. “The Green Machine is also robust with low maintenance requirements, maximizing the machine’s return on investment.”

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