WILLIAM H MCGRATH
Engineering in Lexington, MA
License number
Massachusetts 7044
Expiration Date
Jun 30, 1992
Type
Mechanical Engineer
Address
Address
Lexington, MA 02421
Professional information
Earth Energy Sink
US Patent:
4299270, Nov 10, 1981
Filed:
Mar 19, 1979
Appl. No.:
6/021455
Inventors:
William H. McGrath - Lexington MA
International Classification:
C03B 2308, F24J 302
US Classification:
165 45
Abstract:
The heat sink underlays the structure served and comprises a shallow permeable layer near the surface through which water is circulated and the earth mass below it with which heat is exchanged by conduction and by controlled steady seepage and recycled by pumping from a deep level and by thermal conduction or both.