Presentation on theme: "Energy Efficient Belt Drives"— Presentation transcript:
1 Energy Efficient Belt Drives Workgroup Meeting January 2014Energy Efficient Belt DrivesAbdul Qayyum “Q” MohammedEngineer
2 Why is this important ?Industries have more number of larger motors that are belt driven compared to the commercial and residential sectors.Why Belt drives ?Ease to locate motors, ease of maintenance, universalChange speeds at the end use equipment without a Variable Frequency Drive (VFD)The most common belts are V-belts
3 V-Belt Losses Simplified Bending Losses (Hysteresis). Largest loss in v-belts.Other Losses: Friction (in and out of pulley) , Slip (speed), Stretching (Creep)Belt Temp increases with losses => Reduced belt lifeEnd Use (Power Out)Bending RequiredBending RequiredMotor Power In
4 How to reduce Largest Loss ? SIMPLE ! Use a Notched (Cogged) V- belt
5 Okay, What Does that Mean? Average Efficiency of Belts*Standard-V = 93%Notched-V = 95%2-3% Efficiency Boost100 hp motorOperating 8760 hours/year$0.10 /kWhDemand Savings ~ 2.13 kWCost Savings of ~$1,200 /yearNotched-V’s last longerTwice** the life of a smooth V** Based on discussions with maintenance personnel*S. Nadel, R.N. Elliot, M. Shepard, S. Greenberg, G. Katz, A.T. de Almeida, Energy-efficient Motor Systems: A Handbook on Technology, Program, and Policy Opportunities. 2nd ed. American Council for an Energy-Efficient Economy, 2002.Off the Grid !
6 I want to be even more efficient ! Use Synchronous BeltsLow bending lossLow frictionNO SlipNO CreepUsed in all timing and precision applicationsAverage Efficiency – 98%Demand Savings = 4 kWCost Savings = $3,600 /yearNew system Incremental cost ~ 30% - 50%Higher Retrofit Cost, but more savingsNot Suitable for High Shock load applications.
7 Who Needs Efficient Belts ? Everyone !Top 6 recommendation for industrial facilitiesOver 4,000* recommendationsImplementation Rate: 55%**Data for 1981 to 2013
8 Conclusions Notched V’s Synchronous Belts Longer life offsets ~ 40% cost premiumEnergy Savings ! (2-3% efficient than smooth v-belts)Synchronous Belts98% efficient throughout operating range with No slipHigher energy savings combined with rebates may result in paybacks less than 2 years.Example for 100 hp, running 8,760 hours/year on smooth-V $ 0.1/kWh
9 Abdul Qayyum “Q” Mohammed Questions ?Thanks for Listening!Abdul Qayyum “Q” Mohammedx308
10 Smooth VNotched VSynchronousEfficiency92%95%98%Demand Savings-~2 kW~4 kWImplementation+40% of belt cost+40% System CostLifeX2xCost Savings/ year$1,200$2,400