Apparatus for recovery and use of waste thermal energy

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1994-01-18
Authors
Wechsler, Monroe
Ven Gerpen, John
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Iowa State University Research Foundation, Inc.
The Iowa State University Research Foundation (ISURF) seeks to protect the intellectual property (including new discoveries, technologies, or creative works) of the university's students & faculty which is continuously created through research and other undertakings. It seeks to manage, protect, and own all intellectual property on behalf of the university. The Iowa State University Research Foundation was created in 1938.
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Abstract

Energy recovery apparatus for recovering and using thermal energy comprises multiple series of shape memory elements having decreasing transformation temperatures from one element to the next in the direction of a heating fluid to extract heat over a range of fluid temperatures to effect a shape change of each element. Cooling fluid is flowed alternately through each series of elements to cool the elements and effect another shape change. The cooling fluid exiting a preceding series of elements is used as the heating fluid of the next series of elements to extract further heat indirectly from the original heating fluid. The shape changes of the elements are converted to mechanical work.

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