US 10,761,547 B2Granted

HVAC controller with integrated airside and waterside cost optimization

AssigneeJohnson Controls Technology Company

InventorsMichael J. Risbeck, Robert D. Turney, Christos T. Maravelias

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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.

Claims20

Dependent claims

A heating, ventilating, or air conditioning (HVAC) system for a building, the HVAC system comprising:

a waterside system comprising waterside HVAC equipment that consumes one or more consumable resources from utility providers to generate a heated and/or chilled fluid;
an airside system comprising airside HVAC equipment that receives the heated and/or chilled fluid from the waterside system and uses the heated and/or chilled fluid to heat and/or cool a supply airflow provided to the building;
and
a HVAC controller that receives inputs from both the waterside system and the airside system and performs an airside/waterside optimization process to determine control outputs, wherein the control outputs operate the waterside HVAC equipment and the airside HVAC equipment, wherein the airside/waterside optimization process comprises:
obtaining a function that calculates a predicted cost of the one or more consumable resources consumed by the waterside system and by the airside system;
and
performing an integrated process that minimizes the predicted cost of the one or more consumable resources consumed by the waterside system and by the airside system over a plurality of discrete time steps subject to a set of constraints comprising temperature constraints for the building, the integrated process determining both an amount of thermal energy resources required by the building to satisfy the temperature constraints and control outputs for the waterside system that produce the amount of thermal energy resources required by the building based on the inputs from the waterside system and the airside system.

4 more elements

A predictive cost optimization system for a building HVAC system that uses both a waterside system and an airside system to heat and/or cool a supply airflow provided to a building, the predictive cost optimization system comprising:

a HVAC controller comprising a processor and memory that receives inputs from both the waterside system and the airside system and performs an airside/waterside optimization process to determine control outputs, wherein the control outputs operate the waterside system and the airside system, wherein the airside/waterside optimization process comprises:
obtaining a function that calculates a predicted cost of one or more consumable resources consumed by the waterside system and by the airside system;
performing an integrated process that minimizes the predicted cost of the one or more consumable resources consumed by the waterside system and by the airside system over a plurality of discrete time steps subject to a set of constraints comprising temperature constraints for the building, the integrated process determining both an amount of thermal energy resources required by the building to satisfy the temperature constraints and control outputs for the waterside system that produce the amount of thermal energy resources required by the building based on the inputs from the waterside system and the airside system.

A heating, ventilating, or air conditioning (HVAC) system for a building, the HVAC system comprising:

a waterside system comprising waterside HVAC equipment that consumes one or more consumable resources from utility providers to generate a heated and/or chilled fluid;
an airside system comprising airside HVAC equipment that receives the heated and/or chilled fluid from the waterside system and uses the heated and/or chilled fluid to heat and/or cool a supply airflow provided to the building;
and
a HVAC controller that receives inputs from both the waterside system and the airside system and performs an airside/waterside optimization process to determine control outputs, wherein the control outputs operate the waterside HVAC equipment and the airside HVAC equipment, wherein the airside/waterside optimization process comprises:
performing an integrated process that selects control outputs that correspond to a minimum predicted cost of the one or more consumable resources consumed by the waterside system and by the airside system over a plurality of discrete time steps subject to a set of constraints comprising temperature constraints for the building, the integrated process determining both an amount of thermal energy resources required by the building to satisfy the temperature constraints and control outputs for the waterside system that produce the amount of thermal energy resources required by the building based on the inputs from the waterside system and the airside system.

2 more elements

Dependencies are inferred from the claim text.