Energy Conservation Measure
Air Handling Unit Fan Motor Degradation
Name
air_handling_unit_fan_motor_degradation
Display Name
Air Handling Unit Fan Motor Degradation
Type
UID
9814a5e9-37b7-472a-bae5-e9e2e794c024
Version ID
f7a5563f-691d-431c-9f1f-57bf2fb26bf2
Class Name
AirHandlingUnitFanMotorDegradation
Version Modified
20180828T214729Z
Schema Version
3.0
Attributes
| Measure Type | EnergyPlusMeasure |
| Intended Software Tool | OpenStudio Application |
| Intended Software Tool | Parametric Analysis Tool |
| Intended Software Tool | Analysis Spreadsheet |
Details
| Description | Fan motor degradation occurs due to bearing and stator winding faults, leading to a decrease in motor efficiency and an increase in overall fan power consumption. This measure simulates the air handling unit fan motor degradation by modifying either the Fan:ConstantVolume, Fan:VariableVolume, or the Fan:OnOff objects in EnergyPlus assigned to the ventilation system. The fault intensity (F) for this fault is defined as the ratio of fan motor efficiency degradation. This measure was authored by Herrick Laboratory researchers at Purdue University in collaboration with staff from the National Renewable Energy Laboratory. For assistance using this measure please post to https://unmethours.com/questions/ | |
| Modeler Description | Two user inputs are required and, based on these user inputs, the fan efficiency is recalculated to reflect the faulted operation as shown below, where η_(fan,tot,F) is the degraded total efficiency under faulted condition, η_(fan,tot) is the total efficiency under normal condition, and F is the fault intensity. η_(fan,tot,F) = η_(fan,tot)∙(1-F) | |
Files
| ScheduleSearch.rb |
| measure.rb OpenStudio 2.4.0 Min Compatible Version: 2.4.0 Max Compatible Version: 2.4.1 |
| LICENSE.txt |
Content visibility
Use group defaults
Measure Arguments
| Name | Display Name | Short Name | Description | Units | Type | Required | Model Dependent | Default Value | Choices | Min Value | Max Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| fan_choice | Enter the name of the faulted Fan:ConstantVolume, Fan:OnOff object or Fan:VariableVolume. If you want to impose the fault on all fan objects in the building, enter * ALL Fan objects * | - | - | - | Choice | true | false | * ALL Fan objects * | * ALL Fan objects * | - | - |
| eff_degrad_fac | Degradation factor of the total efficiency of the fan during the simulation period. If the fan is not faulted, set it to zero. | - | - | - | Double | false | false | 0.15 | - | - | - |
| sch_choice | Enter the name of the schedule of the fault level. If you do not have a schedule, leave this blank. | - | - | - | String | false | false | - | - | - | - |