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Waste Heat Recovery

[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]

Stena Line seeking novel approaches to recover energy from exhaust gases from ship engines

November 06, 2017

Stena Line is seeking novel, cost-effective approaches to recover energy from exhaust gases from ship engines and to transform it into a more useful energy form (e.g., electricity to supply hotel loads on board the ship).

Stena Line said that it is especially interested in industrial-scale applications of thermoelectric generators (TEG) that use the temperature difference between the exhaust gas and the ambient air to directly transform waste heat into electricity. The company is also interested in efficient turbine systems that generate electricity from the kinetic energy from the massflow and velocity of the exhaust gases.

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Researchers developing free-piston linear generator for exhaust waste heat recovery

October 28, 2017

Researchers in China have developed a novel free-piston linear generator (FPLG) to recover exhaust waste heat efficiently from a vehicle engine. The FPLG can be used in a small-scale organic Rankine cycle (ORC) system and can directly convert the thermodynamic energy of working fluid into electricity.

In a paper published in the journal Applied Thermal Engineering, the team from Beijing University of Technology, Collaborative Innovation Center of Electric Vehicles in Beijing, and Datong North Tianli Turbocharging Technology Co., Ltd. reports that the energy conversion efficiency of the FPLG can reach up to 45.82% with an intake pressure of 2.6 bar.

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MAHLE acquires thermoelectric generator start-up O-Flexx

February 16, 2017

The MAHLE Group is expanding its expertise in the field of thermoelectrics by acquiring the start-up O-Flexx Technologies. O-Flexx specializes in thermoelectric generators; its R&D center and production facilities for both low- and high-temperature modules are based in Duisburg, Germany. The purchase price will not be disclosed.

O-Flexx Technologies offers thermoelectric technology based on a thin-film approach combined with a cost-optimized, high-volume manufacturing process. O-Flexx says that its technology—protected by several patents—significantly increases conversion efficiency.The company collaborates with a partners from the industry—such as MAHLE—as well as research institutions such as the University of Duisburg-Essen, Vienna University of Technology and several Fraunhofer institutes.

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