ConocoPhillips has secured a deal with ElectraTherm for the installation of two Organic Rankine Cycle (ORC) generators producing up to 65kWe each. The generators run in parallel off the waste exhaust heat of a 1400 hp Waukesha 7042 natural gas-fuelled engine at a gas compression station in Cessford, Alberta, Canada.
The move saw Electratherm install two Green Machine 4400s to recover the waste heat and generate a further 90 kWe from the engine. Exhaust heat from the natural gas engine is converted to hot water and added to the jacket water heat through an engine glycol cooling loop combined with an Aprovis exhaust gas heat exchanger. The waste heat enters each machine at around 110°C and 11 l/s.
The machines (pictured) were installed in the first quarter of 2014 and are remotely monitored from Reno , Nevada , US, some 1200 miles away. This specific site was retrofitted into an existing compressor using an engine driven radiator/gas cooling system.