Patents by Inventor John F. Boardman

John F. Boardman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for controlling an absorption chiller configured to simultaneously produce cooling and heating
    Patent number: 9250002
    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.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: February 2, 2016
    Assignee: CARRIER CORPORATION
    Inventors: Jiachuan Wang, Chaohong Cai, Ahmad M. Mahmoud, Junqiang Fan, Richard L. Martin, John F. Boardman, Timothy C. Wagner
  • SYSTEM AND METHOD FOR CONTROLLING AN ABSORPTION CHILLER CONFIGURED TO SIMULTANEOUSLY PRODUCE COOLING AND HEATING
    Publication number: 20120216552
    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.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 30, 2012
    Applicant: CARRIER CORPORATION
    Inventors: Jiachuan Wang, Chaohong Cai, Ahmad M. Mahmoud, Junqiang Fan, Richard L. Martin, John F. Boardman, Timothy C. Wagner