ORC Technology Replaces Engine’s Radiator, Offsets Radiator Capital Cost and … – Renewable Energy Focus

ElectraTherm utilizes Organic Rankine Cycle (ORC) and proprietary technologies to generate power from low temperature heat ranging from 170-252°F. With the typical engine running at about 35% efficiency, there is considerable waste heat between the jacket water and the exhaust. By acting as the radiator for the engine, ORC technology benefits include additional power generation, increased efficiency and reduced cooling loads. The elimination of radiator capital costs offsets up to 20% of the entire ORC project costs, delivering a payback of three years or less for diesel or heavy fuel oil-fired gensets.

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New heat exchanger for supersonic aircraft engines

High-performance aircraft turbine engine manufacturers are facing unprecedented increases in the amount of heat that must be released in order to maintain acceptable temperatures in supersonic engines that is required for the aircraft to operate at…

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Free piston/ORC system for automotive waste heat recovery being tested at University of Brighton

A prototype automotive waste heat recovery system has been fired up on a recently commissioned test rig at the University of Brighton. A free piston engine eliminates the entire mechanical drivetrain of a conventional engine, allowing ultra-efficient combustion cycles to be developed and reducing the parts count and cost. It completely removes the crankshaft constraint placed on piston movement that actually hinders efficient combustion, and allows piston motion to be optimized to deliver a cleaner, more efficient combustion process.

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Ultrafast heat conduction can manipulate nanoscale magnets – Nanotechnology News (press release)

Researchers at the University of Illinois at Urbana-Champaign have uncovered physical mechanisms allowing the manipulation of magnetic information with heat. These new phenomena rely on the transport of thermal energy, in contrast to the conventional application of magnetic fields, providing a new, and highly desirable way to manipulate magnetization at the nanoscale.

“In our study, we make use of the fact that a heat current passing through a magnetic material creates a separation of electron spins. This process creates a current of magnetic dipoles that we use to manipulate the orientation of a second magnetic layer,” said David Cahill, a Donald B. Willett Professor of Engineering and head of the Department of Materials Science and Engineering at Illinois. “The physics of separating spins with heat currents is related to the operation of thermocouples and the thermoelectric generators that power deep space probes. In those thermoelectric devices, a heat current causes a separation of electrical charges. That separation of electrical charge can then be used to measure a temperature or provide electrical power.”

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