Equipment fault detection, diagnostics and disaggregation system
First Claim
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1. A roof top unit fault detection and diagnostics appliance comprising:
- a computer for connection to a roof top unit comprising a plurality of individual pieces of equipment each piece of equipment having a set of performance stages, the computer comprising;
a listener module operatively coupled to a first and second controller for the roof top unit, the listener module configured to obtain sensor readings from the first controller and system values from the second controller to gather data points for each piece of equipment;
a repeater manager operatively coupled to the first and second controllers, the repeater manager configured to, using the computer, interrupt communication between the first and second controllers and reply to commands from the second controller intended for the first controller;
a baselining manager operatively coupled to the repeater manager and configured to, using the computer, command the repeater manager to interrupt communication between the first and second controllers and send commands to the first controller to enable each performance stage for each piece of equipment and measure a current draw for each enabled performance stage;
a disaggregation module operatively coupled to the baselining manager and configured to, using the computer, receive the measured current draw for each enabled performance stage and determine an actual energy consumed by each piece of equipment; and
a fault detection and diagnostic and efficiency monitoring module operatively coupled to the disaggregation module and the listener module, the fault detection and diagnostic and efficiency monitoring module configured to, using the computer, use the gathered data points to create a predicted energy consumption model for each piece of equipment, partition the predicted energy consumption models into a set of submodels, and compare the set of predicted energy consumption submodels to the actual energy consumed by an equipment subpart of the equipment to derive a performance degradation for each piece of equipment.
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Abstract
A system for fault detection and diagnostics of equipment. The system may also be capable of disaggregation and/or virtual submetering of energy consumption by equipment, such as that of heating, ventilation and air conditioning, lighting, and so forth, in a building. Vibration and current sensors, along with one or more algorithms, may be utilized for fault detection and diagnostics of equipment. Models may be developed to aid in deducing energy consumption of individual components of equipment, and the like, for a building.
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Citations
12 Claims
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1. A roof top unit fault detection and diagnostics appliance comprising:
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a computer for connection to a roof top unit comprising a plurality of individual pieces of equipment each piece of equipment having a set of performance stages, the computer comprising;
a listener module operatively coupled to a first and second controller for the roof top unit, the listener module configured to obtain sensor readings from the first controller and system values from the second controller to gather data points for each piece of equipment;a repeater manager operatively coupled to the first and second controllers, the repeater manager configured to, using the computer, interrupt communication between the first and second controllers and reply to commands from the second controller intended for the first controller; a baselining manager operatively coupled to the repeater manager and configured to, using the computer, command the repeater manager to interrupt communication between the first and second controllers and send commands to the first controller to enable each performance stage for each piece of equipment and measure a current draw for each enabled performance stage; a disaggregation module operatively coupled to the baselining manager and configured to, using the computer, receive the measured current draw for each enabled performance stage and determine an actual energy consumed by each piece of equipment; and a fault detection and diagnostic and efficiency monitoring module operatively coupled to the disaggregation module and the listener module, the fault detection and diagnostic and efficiency monitoring module configured to, using the computer, use the gathered data points to create a predicted energy consumption model for each piece of equipment, partition the predicted energy consumption models into a set of submodels, and compare the set of predicted energy consumption submodels to the actual energy consumed by an equipment subpart of the equipment to derive a performance degradation for each piece of equipment. - View Dependent Claims (2, 3, 4, 5)
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6. A virtual submetering system for a commercial building comprising:
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one or more heating, ventilation, and air conditioning (HVAC) devices, including a rooftop HVAC unit (RTU), a RTU controller, and a supervisory controller; a computer communicatively coupled to the one or more HVAC devices, the RTU, the RTU controller, and the supervisory controller, the computer comprising a memory having a library and a processor; a set of generic HVAC device models in the library for achieving a generality for particular devices corresponding to the one or more HVAC devices, each generic HVAC device model incorporating contributions from equipment subparts of a particular device; wherein the processor is configured to; obtain a generic model from the library that corresponds to the device; obtain meter data for the device from a meter of the one or more HVAC devices; adjust the generic model to obtain a total model for the device by estimating parameters of the generic model based on the obtained meter data; partition the total model into a set of submodels, each submodel corresponding to at least one equipment subpart of the device; and obtain an estimate of electricity consumed by an equipment subpart of the device using a submodel from the set of submodels that corresponds to the equipment subpart of the device. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification