Leslie Leifer

US Patent:

7441558, Oct 28, 2008

Filed:

Jun 13, 2007

Appl. No.:

11/818401

Inventors:

Leslie Leifer - Hancock MI, US
Jay D. Rowe - Hancock MI, US

Assignee:

ELCAL Research, L.L.C. - Wilmington DE

International Classification:

F24J 2/34
F24H 7/00

US Classification:

126617, 126400, 122 1301, 165121, 219 50

Abstract:

An active thermal energy storage system is disclosed which uses an energy storage material that is stable at atmospheric pressure and temperature and has a melting point higher than 32 degrees F. This energy storage material is held within a storage tank and used as an energy storage source, from which a heat transfer system (e. g. , a heat pump) can draw to provide heating of residential or commercial buildings and associated hot water. The energy storage material may also accept waste heat from a conventional air conditioning loop, and may store such heat until needed. The system may be supplemented by a solar panel system that can be used to collect energy during daylight hours, storing the collected energy in the energy storage material. The stored energy may then be used during the evening hours to heat recirculation air for a building in which the system is installed.

US Patent:

7958885, Jun 14, 2011

Filed:

Sep 18, 2008

Appl. No.:

12/212822

Inventors:

Leslie Leifer - Hancock MI, US
Jay D. Rowe - Hancock MI, US

Assignee:

ELCAL Research LLC - Wilmington DE

International Classification:

F24H 7/00

US Classification:

126400, 126617, 392496

Abstract:

An active thermal energy storage system is disclosed which uses an energy storage material that is stable at atmospheric pressure and temperature and has a melting point higher than 32 degrees F. This energy storage material is held within a storage tank and used as an energy storage source, from which a heat transfer system (e. g. , a heat pump) can draw to provide heating of residential or commercial buildings and associated hot water. The energy storage material may also accept waste heat from a conventional air conditioning loop, and may store such heat until needed. The system may be supplemented by a solar panel system that can be used to collect energy during daylight hours, storing the collected energy in the energy storage material. The stored energy may then be used during the evening hours to heat recirculation air for a building in which the system is installed.

US Patent:

20090173336, Jul 9, 2009

Filed:

Mar 16, 2009

Appl. No.:

12/404802

Inventors:

Leslie Leifer - Hancock MI, US
Jay D. Rowe - Hancock MI, US

Assignee:

ELCAL Research, L.L.C. - Wilmington DE

International Classification:

F24J 2/34
F24H 7/04

US Classification:

126617, 392496, 16510411

Abstract:

An active thermal energy storage system is disclosed which uses an energy storage material that is stable at atmospheric pressure and temperature and has a melting point higher than 32 degrees F. This energy storage material is held within a storage tank and used as an energy storage source, from which a heat transfer system (e.g., a heat pump) can draw to provide heating of residential or commercial buildings and associated hot water. The energy storage material may also accept waste heat from a conventional air conditioning loop, and may store such heat until needed. The system may be supplemented by a solar panel system that can be used to collect energy during daylight hours, storing the collected energy in the energy storage material. The stored energy may then be used during the evening hours to heat recirculation air for a building in which the system is installed.

US Patent:

39765849, Aug 24, 1976

Filed:

May 18, 1973

Appl. No.:

5/361834

Inventors:

Leslie Leifer - Hancock MI

Assignee:

Board of Control of Michigan Technological University - Houghton MI

International Classification:

C09K 506

US Classification:

252 77

Abstract:

A thermal energy storage material which is stable at atmospheric temperature and pressure and has a melting point higher than 32. degree. F. is prepared by dissolving a specific class of clathrate forming compounds, such as tetra n-propyl or tetra n-butyl ammonium fluoride, in water to form a substantially solid clathrate. The resultant thermal energy storage material is capable of absorbing heat from or releasing heat to a given region as it transforms between solid and liquid states in response to temperature changes in the region above and below its melting point.