KLAS C HAGLID
Engineering in Ridgewood, NJ
License number
Massachusetts 42776
Issued Date
Aug 31, 2000
Expiration Date
Jun 30, 2016
Type
Mechanical Engineer
Address
Address
Ridgewood, NJ 07450
Professional information
Ventilator System And Method
US Patent:
2008000, Jan 3, 2008
Filed:
Jun 15, 2007
Appl. No.:
11/818675
Inventors:
Klas Haglid - Ridgewood NJ, US
International Classification:
G05D 23/00
US Classification:
165287000
Abstract:
The ventilator system and method use a heat exchanger to selectively transfer heat between fresh outside air entering and exhaust air leaving an enclosed space whenever energy can be recovered from the exhaust air by doing so. The system uses a microprocessor-based controller which stores one or more profiles indicating the time-varying needs of the enclosed space for heating and cooling. The transfer of heat between the exhaust and fresh air is reduced or eliminated simply by reducing the speed of or stopping the exhaust air handler while the fresh air handler continues to run. Evaporative cooling for the exhaust air can be provided, and an all-plastic plate type heat exchanger preferably is used, together with an air handler at the exhaust outlet of the heat exchanger to pull exhaust air through the heat exchanger. If cold water is used in evaporative cooling, another heat exchanger can be used to heat the water by extracting heat from the fresh air. Rotary heat wheels and other types of heat exchangers also can be used. Desiccants or refrigeration can be used for dehumidification, in combination with heat exchangers for energy recovery. Plural heat exchangers can be connected to carry fresh air in series and exhaust air in parallel to increase energy recovery. In one embodiment, the fan of a central air conditioning system is used as the air handler for the heat exchanger by connecting the exhaust conduit of the heat exchanger to the positive pressure side of the fan and extracting a minor fraction of the air for use as exhaust air, and similarly adding fresh air to the negative pressure side of the fan to form a minor fraction of the return air to the central system. In one embodiment, evaporative cooling is used to cool the exhaust air before passing through the heat exchanger. A variable-reheat refrigeration type dehumidification system cools the fresh air by contacting the evaporator coils, and the hot refrigerant gas flows either through a first condenser positioned to reheat the fresh air, or a second condenser cooled by the exhaust air from the enclosed space.
Ventilator System And Method
US Patent:
7231967, Jun 19, 2007
Filed:
May 10, 2002
Appl. No.:
10/142630
Inventors:
Klas C. Haglid - Ridgewood NJ, US
Assignee:
Building Performance Equipment, Inc. - Hillsdale NJ
International Classification:
F24F 7/007, F24F 7/08
US Classification:
165231, 165 54, 165248
Abstract:
The ventilator system and method use a heat exchanger to selectively transfer heat between fresh outside air entering and exhaust air leaving an enclosed space whenever energy can be recovered from the exhaust air by doing so. The system uses a microprocessor-based controller which stores one or more profiles indicating the time-varying needs of the enclosed space for heating and cooling. The transfer of heat between the exhaust and fresh air is reduced or eliminated simply by reducing the speed of or stopping the exhaust air handler while the fresh air handler continues to run. Evaporative cooling for the exhaust air can be provided, and an all-plastic plate type heat exchanger preferably is used, together with an air handler at the exhaust outlet of the heat exchanger to pull exhaust air through the heat exchanger.
Energy Recovery Heat Exchanger And Method
US Patent:
2013024, Sep 26, 2013
Filed:
Mar 22, 2012
Appl. No.:
13/427563
Inventors:
Klas C. Haglid - Ridgewood NJ, US
International Classification:
F28F 1/10, F24H 3/02
US Classification:
165121, 165172
Abstract:
Condensate accumulating in the incoming outside air flow passages of a heat exchanger is fed back into the exhaust flow passages of the heat exchanger to provide improved heat transfer in the heat exchanger, and to avoid the necessity for drainage of the condensate from the heat exchanger. The heat exchanger includes a plastic multi-tube panel core and a solid plastic housing, with opposed-flow heat exchange and inlet-outlet extensions from only one side of the core.
Dehunidifer/Cooler And Method
US Patent:
2008017, Jul 24, 2008
Filed:
Oct 31, 2007
Appl. No.:
11/982210
Inventors:
Klas C. Haglid - Ridgewood NJ, US
Assignee:
Building Performance Equipment Inc. (a Delaware Corporation) - Hillsdale NJ
International Classification:
F25D 21/02, F24H 3/02, F25B 29/00, F25D 21/14, F25D 21/00
US Classification:
165223, 165120, 165233, 165 65, 621761, 62291
Abstract:
The dehumidifier uses an all-plastic air-to-air heat exchanger together with an integral chiller to cool the incoming air to remove water vapor, and then exchange heat with incoming air to cool the incoming air and re-heat the outgoing air. The degree of dehumidification and the temperature of the outgoing air can be controlled by varying the speed of a variable speed fan so as to provide varying degrees of cooling as well as dehumidification. A programmable controller can be used to operate the dehumidifier automatically, either together with a humidistat and thermostat, or in accordance with a predetermined time profile for the conditioned space.
Ventilator System And Method
US Patent:
2008000, Jan 3, 2008
Filed:
Jun 15, 2007
Appl. No.:
11/818634
Inventors:
Klas Haglid - Ridgewood NJ, US
International Classification:
F24F 7/007
US Classification:
454228000
Abstract:
Desiccants or refrigeration can be used for dehumidification, in combination with heat exchangers for energy recovery. Plural heat exchangers can be connected to carry fresh air in series and exhaust air in parallel to increase energy recovery. In one embodiment, the fan of a central air conditioning system is used as the air handler for the heat exchanger by connecting the exhaust conduit of the heat exchanger to the positive pressure side of the fan and extracting a minor fraction of the air for use as exhaust air, and similarly adding fresh air to the negative pressure side of the fan to form a minor fraction of the return air to the central system. In another embodiment, evaporative cooling is used to cool the exhaust air before passing through the heat exchanger.
Energy Recovery Ventilator With Condensate Feedback
US Patent:
8162042, Apr 24, 2012
Filed:
Jan 22, 2007
Appl. No.:
11/656110
Inventors:
Klas C. Haglid - Ridgewood NJ, US
Assignee:
Building Performance Equipment, Inc. - Hillsdale NJ
International Classification:
F28F 3/00, F28D 7/02, F25D 21/00, F25D 21/14
US Classification:
165165, 165166, 62272, 62285
Abstract:
Condensate accumulating in the incoming outside air flow passages of a heat exchanger is fed back into the exhaust flow passages of the heat exchanger to provide improved heat transfer in the heat exchanger, and to avoid the necessity for drainage of the condensate from the heat exchanger. The heat exchanger includes a plastic multi-tube panel core and a solid plastic housing, with opposed-flow heat exchange and inlet-outlet extensions from only one side of the core.