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EVAPORATION-DRIVEN ENGINES

United States Patent Application

20170051728
A1
View the Complete Application at the US Patent & Trademark Office
Evaporation-driven engines are disclosed herein. An example engine can include a water source having a high humidity zone proximate the surface of the water source, a supporting structure, and a hygroscopic material disposed on the supporting structure and configured to generate mechanical force in response to a changing relative humidity. The hygroscopic material can be repeatedly exposed to the high humidity zone and removed from the high humidity zone thereby causing the hygroscopic material to generate mechanical force.
Chen, Xi (New York, NY), Goodnight, Davis W. (Salisbury, NC), Sahin, Ozgur (New York, NY)
THE TRUSTEES OF COLUMBIA UNIVERISTY IN THE CITY OF NEW YORK (New York NY)
15/ 308,122
May 8, 2015
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] This invention was made with government support under Grant No. ER46847, awarded by the U.S. Department of Energy. The government has certain rights in the invention.