Johnson Controls Tyco IP Holdings Llp

Johnson Controls Technology Company

Tyco Fire + Security Gmbh

Joseph P Carmody

Jon T Mueller

Michael J Wenzel

Matthew J Asmus

James P Kummer

Lisa E Strand

Nicole Ann Madison

Carol T Tumey

Dennis J Flood

Peter A Kinsella

A controller for heating, ventilation, or air conditioning (HVAC) equipment includes a communications interface configured to communicate with first HVAC equipment and second HVAC equipment and a processing circuit communicably coupled to the communications interface. The processing circuit is configured to detect a staging event for the first HVAC equipment occurring at a first time, obtain a delay time based on an estimated amount of time required to reach steady state after the staging event for the first HVAC equipment occurs at the first time, determine whether the delay time has elapsed since the staging event for the first HVAC equipment has occurred, and prevent the second HVAC equipment from staging in response to a determination that the delay time has not elapsed since the staging event for the first HVAC equipment has occurred.

Control system with coordinated equipment staging

A system for monitoring and controlling a central plant includes a high level optimizer, a subplant monitor, a user interface, and a dispatch graphical user interface (GUI) generator. The central plant includes a plurality of subplants configured to serve a thermal energy load. The high level optimizer is configured to determine recommended subplant loads for each of the plurality of subplants. The subplant monitor is configured to monitor the central plant and identify actual subplant loads for each of the plurality of subplants. The user interface is configured to receive manual subplant loads specified by a user. The dispatch GUI generator is configured to generate a dispatch GUI and present the dispatch GUI via the user interface. The dispatch GUI includes the recommended subplant loads, the actual subplant loads, and the manual subplant loads.

Systems and methods for monitoring and controlling a central plant

A controller for multiple groups of equipment detects a staging event for a first group of equipment and determines when the staging event occurs. The controller determines whether a predetermined time period has elapsed since the staging event for the first group of equipment has occurred and prevents a second group of equipment from staging in response to a determination that the predetermined time period has not elapsed since the staging event for the first group of equipment has occurred. Preventing the second group of equipment from staging reduces peak energy consumption during the predetermined time period and reduces a demand charge based on the peak energy consumption.

A central plant includes at least a first subplant and a second subplant configured to serve a thermal energy load of a building. A controller for the central plant includes an equipment staging detector configured to detect a staging event for equipment of the second subplant and to determine when the staging event occurs. The controller includes a subplant staging evaluator configured to use input from the equipment staging detector to determine whether a predetermined time period has elapsed since the staging event for the equipment of the second subplant has occurred. The controller includes a subplant staging preventer configured to prevent the first subplant from staging equipment of the first subplant in response to a determination that the predetermined time period has not elapsed since the staging event for the equipment of the second subplant has occurred.

Central plant with coordinated HVAC equipment staging across multiple subplants

Growing community of inventors

Saukville, WI, United States of America

Joseph P Carmody