公开(公告)号：US09982903B1

公开(公告)日：2018-05-29

申请号：US15411878

申请日：2017-01-20

Applicant: Johnson Controls Technology Company

Inventor： Bradley J. Ridder ,  Graeme Willmott ,  Matthew J. Asmus

IPC: F24F11/00 ,  G01W1/10

CPC classification number: F24F11/0001 ,  F24F11/30 ,  F24F11/46 ,  F24F11/62 ,  F24F11/70 ,  F24F2011/0002 ,  F24F2110/10 ,  F24F2110/12 ,  F24F2140/60 ,  G01W1/10

Abstract: A heating, ventilation, or air conditioning (HVAC) system for a building includes, a chiller, a heat exchanger separate from the chiller, and a controller. The chiller is configured to provide mechanical cooling for a cooling load in the building when the HVAC system operates in a mechanical cooling state. The heat exchanger is configured to provide free cooling for the cooling load in the building when the HVAC system operates in a free cooling state. The controller is configured to predict outside air temperature and transition the HVAC system from operating in the mechanical cooling state to operating in the free cooling state in response to a determination that the predicted outside air temperature will be less than the free cooling temperature threshold for at least the minimum free cooling time.

公开(公告)号：US11256219B2

公开(公告)日：2022-02-22

申请号：US16394810

申请日：2019-04-25

Applicant: Johnson Controls Technology Company

Inventor： Ryan C. Beaty ,  Graeme Willmott ,  Jared W. Fread ,  Shawn A. Schlagenhaft

IPC: G05B13/02 ,  G06F9/50 ,  G06Q50/06 ,  G06Q10/06 ,  G05D23/19 ,  F24D19/10

Abstract: Disclosed herein are related to a system, a method, and a non-transitory computer readable medium for operating an energy plant having a plurality of subplants that operate to produce one or more resources consumed by a building based on ranks. In one aspect, the system obtains rank identifiers indicating ranks of the plurality of subplants. In one aspect, the ranks indicate a priority of each subplant with respect to production of a resource relative to other subplants that produce the resource. In one aspect, the system determines resource allocation of the plurality of subplants according to the ranks of the plurality of subplants. The system may operate the plurality of subplants according to the resource allocation.

公开(公告)号：US11209184B2

公开(公告)日：2021-12-28

申请号：US16246454

申请日：2019-01-11

Applicant: Johnson Controls Technology Company

Inventor： Michael J. Wenzel ,  Mohammad N. Elbsat ,  Matthew J. Ellis ,  Matthew J. Asmus ,  Andrew J. Przybylski ,  Ryan A. Baumgartner ,  John H. Burroughs ,  Kirk H. Drees ,  Robert D. Turney ,  Graeme Willmott

IPC: F24F11/47 ,  G05B19/418 ,  G05B13/04 ,  G06Q50/06 ,  G06Q30/02 ,  G06Q10/04

Abstract: A control system for a central energy facility with distributed energy storage includes a high level coordinator, a low level airside controller, a central plant controller, and a battery controller. The high level coordinator is configured to perform a high level optimization to generate an airside load profile for an airside system, a subplant load profile for a central plant, and a battery power profile for a battery. The low level airside controller is configured to use the airside load profile to operate airside HVAC equipment of the airside subsystem. The central plant controller is configured to use the subplant load profile to operate central plant equipment of the central plant. The battery controller is configured to use the battery power profile to control an amount of electric energy stored in the battery or discharged from the battery at each of a plurality of time steps in an optimization period.

公开(公告)号：US10558178B2

公开(公告)日：2020-02-11

申请号：US16039076

申请日：2018-07-18

Applicant: Johnson Controls Technology Company

Inventor： Graeme Willmott ,  Matthew J. Asmus

IPC: G05B13/02 ,  F24F11/64 ,  G06F17/16 ,  F24F11/54 ,  F24F11/46 ,  G06F17/10 ,  F24F140/50 ,  F24F140/60 ,  F24F140/00

Abstract: Systems and methods for predicting a plurality of thermodynamic states of a plurality of heat, ventilation, and air conditioning (HVAC) devices of an energy plant are disclosed. The system includes a processor and a non-transitory computer readable medium storing instructions when executed causing the processor to: obtain plant netlist data describing the plurality of HVAC devices of the energy plant and connections of the plurality of HVAC devices to corresponding nodes; identify, from the first reduced subset, a second reduced subset of the plurality of thermodynamic states to be predicted by propagating a known value of the plurality of thermodynamic states using a linear solver; predict the second reduced subset of the plurality of thermodynamic states using a non-linear solver; and determine the plurality of thermodynamic states of the energy plant at the plurality of nodes based on the predicted second reduced subset of the plurality of thermodynamic states.

公开(公告)号：US10288306B2

公开(公告)日：2019-05-14

申请号：US15925466

申请日：2018-03-19

Applicant: Johnson Controls Technology Company

Inventor： Bradley J. Ridder ,  Graeme Willmott ,  Matthew J. Asmus

IPC: F24F11/00 ,  G01W1/10 ,  F24F11/30 ,  F24F11/70 ,  F24F11/62 ,  F24F11/46 ,  F24F110/12 ,  F24F110/10 ,  F24F140/60

Abstract: A heating, ventilation, or air conditioning (HVAC) system for a building includes an air handling unit (AHU) and a controller. The AHU is configured to provide mechanical cooling for a cooling load in the building when operating in a mechanical cooling state and provide free cooling for the cooling load in the building when operating in a free cooling state. The controller is configured to calculate a minimum free cooling time based on an estimated cost savings resulting from operating in the free cooling state relative to operating in the mechanical cooling state and transition the AHU from operating in the mechanical cooling state to operating in the free cooling state in response to predicting that outside air temperature will be less than a free cooling temperature threshold for at least the minimum free cooling time.

公开(公告)号：US20190032947A1

公开(公告)日：2019-01-31

申请号：US16039076

申请日：2018-07-18

Applicant: Johnson Controls Technology Company

Inventor： Graeme Willmott ,  Matthew J. Asmus

IPC: F24F11/64 ,  F24F11/54 ,  G06F17/16

Abstract: Systems and methods for predicting a plurality of thermodynamic states of a plurality of heat, ventilation, and air conditioning (HVAC) devices of an energy plant are disclosed. The system includes a processor and a non-transitory computer readable medium storing instructions when executed causing the processor to: obtain plant netlist data describing the plurality of HVAC devices of the energy plant and connections of the plurality of HVAC devices to corresponding nodes; identify, from the first reduced subset, a second reduced subset of the plurality of thermodynamic states to be predicted by propagating a known value of the plurality of thermodynamic states using a linear solver; predict the second reduced subset of the plurality of thermodynamic states using a non-linear solver; and determine the plurality of thermodynamic states of the energy plant at the plurality of nodes based on the predicted second reduced subset of the plurality of thermodynamic states.

公开(公告)号：US20180209674A1

公开(公告)日：2018-07-26

申请号：US15925466

申请日：2018-03-19

Applicant: Johnson Controls Technology Company

Inventor： Bradley J. Ridder ,  Graeme Willmott ,  Matthew J. Asmus

IPC: F24F11/00 ,  F24F11/70 ,  F24F11/30 ,  F24F11/62 ,  F24F11/46 ,  F24F140/60 ,  F24F110/12 ,  G01W1/10

CPC classification number: F24F11/0001 ,  F24F11/30 ,  F24F11/46 ,  F24F11/62 ,  F24F11/70 ,  F24F2011/0002 ,  F24F2011/0006 ,  F24F2110/10 ,  F24F2110/12 ,  F24F2140/60 ,  G01W1/10 ,  Y02B30/542

Abstract: A heating, ventilation, or air conditioning (HVAC) system for a building includes an air handling unit (AHU) and a controller. The AHU is configured to provide mechanical cooling for a cooling load in the building when operating in a mechanical cooling state and provide free cooling for the cooling load in the building when operating in a free cooling state. The controller is configured to calculate a minimum free cooling time based on an estimated cost savings resulting from operating in the free cooling state relative to operating in the mechanical cooling state and transition the AHU from operating in the mechanical cooling state to operating in the free cooling state in response to predicting that outside air temperature will be less than a free cooling temperature threshold for at least the minimum free cooling time.

公开(公告)号：US20170179716A1

公开(公告)日：2017-06-22

申请号：US14971813

申请日：2015-12-16

Applicant: Johnson Controls Technology Company

Inventor： Steven R. Vitullo ,  Graeme Willmott

IPC: H02J3/00 ,  G06F17/18 ,  G05B13/04

Abstract: Predictor variables that affect a building energy load are sampled at a plurality of times within a time period and aggregated to generate an aggregated value for each predictor variable over the time period. A model is generated which estimates the building energy load in terms of the predictor variables. A regression process is performed to generate values for a plurality of regression coefficients in the model based on a cumulative building energy load for the time period and the aggregated values. The sampled values of the predictor variables are then applied as inputs to the model to estimate building energy loads at each of the plurality of times. The estimated building energy loads may be used as inputs to a controller that optimizes operation of a central plant.

公开(公告)号：US11221156B2

公开(公告)日：2022-01-11

申请号：US16389731

申请日：2019-04-19

Applicant: Johnson Controls Technology Company

Inventor： Graeme Willmott ,  Matthew J. Asmus ,  Jared W. Fread ,  Ryan C. Beaty ,  Shawn A. Schlagenhaft

IPC: G05B21/00 ,  G01M1/38 ,  G05B13/00 ,  G05B15/00 ,  G05D23/00 ,  F24F11/38 ,  G05B19/042 ,  F24F11/64 ,  F24F11/65 ,  F24F140/60 ,  F24F140/00

Abstract: Disclosed herein are related to a method, a system, and a non-transitory computer readable medium storing instructions for operating a group of central plant equipment to serve thermal energy loads of a building or building system. In one approach, a base capacity of one or more devices of the group of central plant equipment is identified. A change in requested load allocated to the one or more devices crossing the base capacity at a crossover time may be detected. In one approach, an adjusted capacity of the one or more devices is set such that the adjusted capacity is offset from the base capacity before the crossover time and decays toward the base capacity during a decay period after the crossover time. The requested load allocated may be compared with the adjusted capacity after the crossover time. The group of central plant equipment may be operated according to the comparison.

公开(公告)号：US11092352B2

公开(公告)日：2021-08-17

申请号：US16046955

申请日：2018-07-26

Applicant: Johnson Controls Technology Company

Inventor： Graeme Willmott ,  Jared W. Fread ,  Matthew J. Asmus

IPC: F24F11/46 ,  F24F11/52 ,  F24F11/56 ,  F24F11/65 ,  G05B15/02 ,  F24F11/64 ,  F24F11/89 ,  F24F11/30 ,  F24F140/60 ,  F24F140/50 ,  F24F140/00

Abstract: Disclosed herein are related to a system, a method, and a non-transitory computer readable medium for operating an energy plant. In one aspect, a system determines schematic relationships of a plurality of heat, ventilation, and air conditioning (HVAC) devices of the energy plant based on connections of the plurality of HVAC devices. Each HVAC device is configured to operate according to a corresponding operating parameter. The system determines, from a plurality of HVAC devices, a reduced subset of the HVAC devices based on the schematic relationships. The system predicts thermodynamic states of the reduced subset. The system determines a set of operating parameters of the plurality of HVAC devices based on the thermodynamic states. The system operates the plurality of HVAC devices according to the set of operating parameters.