3.0 improve_fan_belt_efficiency ebeca0aa-a432-4283-a714-17116f7c8f8c ebb40687-ed5b-4fe7-a6a8-45da30a3a895 20230602T151919Z F78494F2 ImproveFanBeltEfficiency Improve Fan Belt Efficiency The assessment team observed opportunities for fan belt improvements on HVAC fan drives. These motors are asynchronous induction motors. Improvements in belt efficiency result in energy savings at the motor. The three common belt efficiency measures are belt tightening (1%-5% savings per motor), replace standard v-belts with cogged v-belts (2% savings per motor), and replace standard belts with synchronous belts (3% savings per motor). Well-adjusted belts run cooler, last longer, and operate at higher efficiency than standard belts. The belts associated with the largest motors, longest run times, and that are run closest to full load should be given priority when making replacements. This measure alters fans on all or a single air loop in the building. The three belt ECMs options are then exposed as three user argument fields with a default populated for each. The range of efficiency improvements will be listed in the user argument description. The three user arguments will be summed and added to the existing motor efficiency. The cost arguments are user arguments that are also populated with a default. If arguments are left blank, the user is notified that the model has not changed in the run manager. A warning is issued if the motor efficiency >96% and an error is issued if efficiency is >100%. object Choose an Air Loop to Alter. Choice true false {9e804813-d523-43be-b94a-f423b2cfeacb} {9e804813-d523-43be-b94a-f423b2cfeacb} *All Air Loops* motor_eff Motor Efficiency Improvement Due to Fan Belt Improvements(%). Double true false 3 remove_costs Remove Baseline Costs From Effected Fans? Boolean true false false true true false false material_cost Material and Installation Costs per Motor ($). Double true false 0 demolition_cost Demolition Costs per Motor ($). Double true false 0 years_until_costs_start Years Until Costs Start (whole years). Integer true false 0 demo_cost_initial_const Demolition Costs Occur During Initial Construction? Boolean true false false true true false false expected_life Expected Life (whole years). Integer true false 20 om_cost O & M Costs per Motor ($). Double true false 0 om_frequency O & M Frequency (whole years). Integer true false 1 HVAC.Distribution Measure Type ModelMeasure string Uses SketchUp API false boolean 0320_ModelWithHVAC_01.osm osm test 4A5352A1 README.md.erb erb readmeerb 703C9964 README.md md readme 0A5ECB03 LICENSE.md md license 0DDDFB54 OpenStudio 2.0.0 2.0.0 measure.rb rb script DC853729 ImproveFanBeltEfficiency_Test.rb rb test 8E07B9DC