Patents by Inventor Christos T. Maravelias

Christos T. Maravelias 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).

  • Publication number: 20240192647
    Abstract: A building heating, ventilating, or air conditioning (HVAC) system includes waterside HVAC equipment configured to generate a heated or chilled fluid and airside HVAC equipment configured to use the heated or chilled fluid to heat or cool a supply airflow provided to a building. A controller for the HVAC system includes one or more processing circuits configured to perform an integrated airside/waterside control process to determine control outputs for both the waterside HVAC equipment and the airside HVAC equipment simultaneously such that the control outputs for the airside HVAC equipment are based on the control outputs for the waterside HVAC equipment and vice versa. The controller is configured to operate the waterside HVAC equipment and the airside HVAC equipment to provide heating or cooling to the building using the control outputs.
    Type: Application
    Filed: February 26, 2024
    Publication date: June 13, 2024
    Applicant: Tyco Fire & Security GmbH
    Inventors: Michael J. Risbeck, Robert D. Turney, Christos T. Maravelias
  • Patent number: 11953865
    Abstract: A controller for heating, ventilation, or air conditioning (HVAC) equipment including a processing circuit configured to perform a first optimization to generate a first set of control decisions for HVAC equipment including waterside HVAC equipment that consume resources from utility providers to generate a heated or chilled fluid and airside HVAC equipment that receive and use the fluid from the waterside HVAC equipment to heat or cool a supply of airflow for a building. The processing circuit is configured to perform a second optimization subject to a constraint based on a result of the first optimization to generate a second set of control decisions for the HVAC equipment and to combine the first and second sets to generate a combined set of control decisions for the HVAC equipment. The processing circuit is configured to operate the HVAC equipment in accordance with the combined set of control decisions.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: April 9, 2024
    Assignee: Johnson Controls Tyco IP Holdings LLP
    Inventors: Michael J. Risbeck, Robert D. Turney, Christos T. Maravelias
  • Patent number: 11635751
    Abstract: A method for performing model predictive maintenance (MPM) of building equipment includes obtaining a first objective function that defines a cost of operating the building equipment and at least one of replacing the building equipment or performing maintenance on the building equipment as a function of operating decisions and at least one of replacement decisions or maintenance decisions for the building equipment for multiple short-term time steps within a short-term horizon. The method also includes performing a first optimization of the first objective function to generate a short-term maintenance and replacement schedule for the building equipment over a duration of the short-term horizon. The method also includes using a result of the first optimization to perform a second optimization of a second objective function to generate a long-term maintenance and replacement schedule for the building equipment over a duration of a long-term horizon.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: April 25, 2023
    Assignee: Johnson Controls Tyco IP Holdings LLP
    Inventors: Yaqing Wu, Mohammad N. Elbsat, Michael J. Wenzel, Christos T. Maravelias
  • Publication number: 20210072742
    Abstract: A method for performing model predictive maintenance (MPM) of building equipment includes obtaining a first objective function that defines a cost of operating the building equipment and at least one of replacing the building equipment or performing maintenance on the building equipment as a function of operating decisions and at least one of replacement decisions or maintenance decisions for the building equipment for multiple short-term time steps within a short-term horizon. The method also includes performing a first optimization of the first objective function to generate a short-term maintenance and replacement schedule for the building equipment over a duration of the short-term horizon. The method also includes using a result of the first optimization to perform a second optimization of a second objective function to generate a long-term maintenance and replacement schedule for the building equipment over a duration of a long-term horizon.
    Type: Application
    Filed: September 10, 2020
    Publication date: March 11, 2021
    Applicant: Johnson Controls Technology Company
    Inventors: Yaqing WU, Mohammad N. ELBSAT, Michael J. WENZEL, Christos T. MARAVELIAS
  • Patent number: 10761547
    Abstract: A building HVAC system includes a waterside system and an airside system. The waterside system consumes one or more resources from utility providers to generate a heated and/or chilled fluid. The airside system uses the heated and/or chilled fluid to heat and/or cool a supply airflow provided to the building. A HVAC controller performs an integrated airside/waterside optimization process to simultaneously determine control outputs for both the waterside system and the airside system. The optimization process includes optimizing a predictive cost model that predicts the cost of the resources consumed by the HVAC system, subject to a set of optimization constraints including temperature constraints for the building. The HVAC controller uses the determined control outputs to control the HVAC equipment of the waterside system and the airside system.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: September 1, 2020
    Assignee: Johnson Controls Technology Company
    Inventors: Michael J. Risbeck, Robert D. Turney, Christos T. Maravelias
  • Publication number: 20200125045
    Abstract: A controller for heating, ventilation, or air conditioning (HVAC) equipment including a processing circuit configured to perform a first optimization to generate a first set of control decisions for HVAC equipment including waterside HVAC equipment that consume resources from utility providers to generate a heated or chilled fluid and airside HVAC equipment that receive and use the fluid from the waterside HVAC equipment to heat or cool a supply of airflow for a building. The processing circuit is configured to perform a second optimization subject to a constraint based on a result of the first optimization to generate a second set of control decisions for the HVAC equipment and to combine the first and second sets to generate a combined set of control decisions for the HVAC equipment. The processing circuit is configured to operate the HVAC equipment in accordance with the combined set of control decisions.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 23, 2020
    Applicant: Johnson Controls Technology Company
    Inventors: Michael J. Risbeck, Robert D. Turney, Christos T. Maravelias
  • Publication number: 20160313751
    Abstract: A building HVAC system includes a waterside system and an airside system. The waterside system consumes one or more resources from utility providers to generate a heated and/or chilled fluid. The airside system uses the heated and/or chilled fluid to heat and/or cool a supply airflow provided to the building. A HVAC controller performs an integrated airside/waterside optimization process to simultaneously determine control outputs for both the waterside system and the airside system. The optimization process includes optimizing a predictive cost model that predicts the cost of the resources consumed by the HVAC system, subject to a set of optimization constraints including temperature constraints for the building. The HVAC controller uses the determined control outputs to control the HVAC equipment of the waterside system and the airside system.
    Type: Application
    Filed: April 23, 2015
    Publication date: October 27, 2016
    Applicant: Johnson Controls Technology Company
    Inventors: Michael J. Risbeck, Robert D. Turney, Christos T. Maravelias
  • Patent number: 9146550
    Abstract: A scheduling system for chemical processing provides an electronic computer that models the process as a set of tasks with known production ranges. A desired output from the process is back projected through the process to determine production quantities of each task of the process within the production ranges. These values are used to constrain a mixed integer programming evaluation of the schedule which may be used to control operation of the equipment.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: September 29, 2015
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Christos T. Maravelias, Sara Zenner, Arul Sundaramoorthy
  • Publication number: 20140031963
    Abstract: A scheduling system for chemical processing provides an electronic computer that models the process as a set of tasks with known production ranges. A desired output from the process is back projected through the process to determine production quantities of each task of the process within the production ranges. These values are used to constrain a mixed integer programming evaluation of the schedule which may be used to control operation of the equipment.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 30, 2014
    Inventors: Christos T. Maravelias, Sara Zenner, Arul Sundaramoorthy