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Energy Efficient Belt Drives Workgroup Meeting January 2014 Abdul Qayyum “Q” Mohammed Engineer.

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Presentation on theme: "Energy Efficient Belt Drives Workgroup Meeting January 2014 Abdul Qayyum “Q” Mohammed Engineer."— Presentation transcript:

1 Energy Efficient Belt Drives Workgroup Meeting January 2014 Abdul Qayyum “Q” Mohammed Engineer

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, universal  Change 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 life Motor Power In End Use (Power Out) Bending Required

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 Boost 100 hp motor Operating 8760 hours/year $0.10 /kWh Demand Savings ~ 2.13 kW Cost Savings of ~$1,200 /year  Notched-V’s last longer Twice** 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, Off the Grid !

6 I want to be even more efficient ! Use Synchronous Belts  Low bending loss  Low friction  NO Slip  NO Creep  Used in all timing and precision applications Average Efficiency – 98%  Demand Savings = 4 kW  Cost Savings = $3,600 /year  New system Incremental cost ~ 30% - 50%  Higher Retrofit Cost, but more savings  Not Suitable for High Shock load applications.

7 Who Needs Efficient Belts ? Everyone ! Top 6 recommendation for industrial facilities Over 4,000* recommendations Implementation Rate: 55%* *Data for 1981 to 2013

8 Conclusions  Notched V’s  Longer life offsets ~ 40% cost premium  Energy Savings ! (2-3% efficient than smooth v-belts)  Synchronous Belts  98% efficient throughout operating range with No slip  Higher 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 Questions ? Thanks for Listening! Abdul Qayyum “Q” Mohammed x308

10 Smooth VNotched VSynchronous Efficiency92%95%98% Demand Savings-~2 kW~4 kW Implementation-+40% of belt cost+40% System Cost LifeX2x- Cost Savings/ year-$1,200$2,400


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