公开(公告)号：US20180004173A1

公开(公告)日：2018-01-04

申请号：US15635754

申请日：2017-06-28

Applicant: Johnson Controls Technology Company

Inventor： Nishith R. Patel ,  Matthew J. Ellis ,  Michael J. Wenzel ,  Robert D. Turney ,  Brett M. Lenhardt

IPC: G05B13/04 ,  F24F11/00 ,  G05D7/06

Abstract: A model predictive control system is used to optimize energy cost in a variable refrigerant flow (VRF) system. The VRF system includes an outdoor subsystem and a plurality of indoor subsystems. The model predictive control system includes a high-level model predictive controller (MPC) and a plurality of low-level indoor MPCs. The high-level MPC performs a high-level optimization to generate an optimal indoor subsystem load profile for each of the plurality of indoor subsystems. The optimal indoor subsystem load profiles optimize energy cost. Each of the low-level indoor MPCs performs a low-level optimization to generate optimal indoor setpoints for one or more indoor VRF units of the corresponding indoor subsystem. The indoor setpoints can include temperature setpoints and/or refrigerant flow setpoints for the indoor VRF units.

公开(公告)号：US20180004171A1

公开(公告)日：2018-01-04

申请号：US15199910

申请日：2016-06-30

Applicant: Johnson Controls Technology Company

Inventor： Nishith R. Patel ,  Robert D. Turney ,  Matthew J. Ellis

IPC: G05B13/04 ,  F24F11/00 ,  F28D20/00 ,  G05B11/01 ,  G05D23/19 ,  G05B19/042 ,  G05B15/02 ,  F24F5/00 ,  F24F3/044

CPC classification number: G05B13/041 ,  F24F3/044 ,  F24F5/0017 ,  F24F11/30 ,  F24F11/46 ,  F24F11/54 ,  F24F11/56 ,  F24F11/62 ,  F24F11/77 ,  F24F11/83 ,  F24F2005/0025 ,  F24F2110/10 ,  F24F2110/20 ,  F24F2110/40 ,  F24F2120/10 ,  F24F2130/00 ,  F24F2130/10 ,  F28D20/0034 ,  F28D2020/0082 ,  G05B11/01 ,  G05B17/02 ,  G05B2219/2614 ,  G05B2219/37375 ,  G05D23/1917 ,  G05D23/1923 ,  G05D23/1932 ,  Y02E60/142 ,  Y02E60/147

Abstract: A building HVAC system includes an airside system having a plurality of airside subsystems, a waterside system, a high-level model predictive controller (MPC), and a plurality of low-level airside MPCs. Each airside subsystem includes airside HVAC equipment configured to provide heating or cooling to the airside subsystem. The waterside system includes waterside HVAC equipment configured to produce thermal energy used by the airside system to provide the heating or cooling. The high-level MPC is configured to perform a high-level optimization to generate an optimal airside subsystem load profile for each of the plurality of airside subsystems. The optimal airside subsystem load profiles optimize a total cost of energy consumed by the airside system and the waterside system Each of the low-level airside MPCs is configured to operate the airside HVAC equipment of an airside subsystem according to the load profile for the airside subsystem.