Jiachuan Wang from Clarksville, MD, age 52

Us Patents

Hybrid Space And Hot Water Heating Heat Pump
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US Patent:

20130104574, May 2, 2013
Filed:

Nov 1, 2012
Appl. No.:

13/666219
Inventors:

Daniel J. Dempsey - Carmel IN, US
Derek Leman - Brownsburg IN, US
Jiachuan Wang - Chapel Hill NC, US
Larry D. Burns - Avon IN, US
Matt A. Gibson - Farmington CT, US
Matthew Austin - Indianapolis IN, US
Troy A. Branam - Camby IN, US
International Classification:

F25B 29/00
US Classification:

62 79, 62159
Abstract:

A hybrid space and water heating heat pump system includes a heat pump including an outdoor assembly and an indoor assembly; a hot water module including a first heat exchanger, a controller, and a water pump connected to a water line, the first heat exchanger being configured for heating water; and a water heater in fluid communication with the hot water module, the water heater configured for receiving heated water from the first heat exchanger; wherein the controller is configured to select between one of conditioning an interior space or heating of the water in the first heat exchanger; and wherein the heat pump is configured for circulating a refrigerant through a first refrigerant circuit in response to the conditioning of the interior space and circulating the refrigerant through a second refrigerant circuit in response to the heating of the water in the first heat exchanger.

System And Method For Controlling An Absorption Chiller Configured To Simultaneously Produce Cooling And Heating
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US Patent:

20120216552, Aug 30, 2012
Filed:

Feb 27, 2012
Appl. No.:

13/405823
Inventors:

Jiachuan Wang - Chapel Hill NC, US
Chaohong Cai - Weatogue CT, US
Ahmad M. Mahmoud - Bolton CT, US
Junqiang Fan - Glastonbury CT, US
Richard L. Martin - Cicero NY, US
John F. Boardman - Manchester CT, US
Timothy C. Wagner - East Hartford CT, US
Assignee:

CARRIER CORPORATION - Farmington CT
International Classification:

F25B 29/00
F25B 15/00
US Classification:

62101, 62159
Abstract:

A system for controlling an absorption chiller includes feedback control loops determining adjustments to system cooling and heating capacities and a controller for simultaneously adjusting positions of an energy input valve, a hot water valve, and a chilled water valve. The controller adjusts valves based on desired adjustments to system cooling and heating capacities and performance maps characterizing relationships between cooling capacity and heating capacities and valve positions. A method for controlling an absorption chiller includes the step of obtaining a performance map characterizing heat energy input to cooling and heating loops as functions of valve positions. To obtain the map, the hot water valve is held in a substantially constant position while the chilled water valve is modulated. Similarly, the hot water valve is modulated while the chilled water valve is held in a substantially constant position.