The Importance of Load Factor Reduction and Real-Time Energy Monitoring

Harnett County Schools

Terms: kW & kWh

Demand (kW) – the rate at which electricity is consumed.

Energy (kWh) – amount of electricity consumed over a period of time.

Hose Analogy

Progress Energy TOU Rates (Summer)

Progress Energy TOU Rates (Summer)

Progress Energy TOU Rates (Winter)

Progress Energy TOU Rates (Winter)

Coats-Erwin Middle

Load Factor

Colorado Springs Utility

Billing Period (Previous 12 Months) kWh Consumption kW Demand Metered Svc Charges

Read Date Days Rate Actual* Billing* Daily Actual* Billing* L F* Monthly per kWh

                     

11/6/2009 28 SGS-TOU 79,000 79,000 2,821 386 386 30% $7,232.18 9.15 ¢

10/9/2009 29 SGS-TOU 94,400 94,400 3,255 388 388 35% $8,805.22 9.33 ¢

9/10/2009 30 SGS-TOU 106,200 106,200 3,540 502 502 29% $10,867.18 10.23 ¢

8/11/2009 32 SGS-TOU 49,600 49,600 1,550 264 242 24% $5,141.61 10.37 ¢

7/10/2009 31 SGS-TOU 60,600 60,600 1,955 436 436 19% $7,684.91 12.68 ¢

6/9/2009 32 SGS-TOU 99,400 99,400 3,106 422 420 31% $8,845.48 8.90 ¢

5/8/2009 29 SGS-TOU 78,600 78,600 2,710 398 398 28% $7,244.79 9.22 ¢

4/9/2009 30 SGS-TOU 83,600 83,600 2,787 334 334 35% $7,076.04 8.46 ¢

3/10/2009 29 SGS-TOU 81,000 81,000 2,793 364 364 32% $7,150.23 8.83 ¢

2/9/2009 31 SGS-TOU 82,000 82,000 2,645 342 342 32% $7,014.94 8.55 ¢

1/9/2009 32 SGS-TOU 75,600 75,600 2,363 354 354 28% $6,753.27 8.93 ¢

12/8/2008 32 SGS-TOU 80,000 80,000 2,500 320 320 33% $6,275.53 7.84 ¢

                     

Total 365   970,000 970,000         $90,091.38  

Maximum 32   106,200 106,200 3,540 502 502 35% $10,867.18 12.68 ¢

Average 30.42   80,833 80,833 2,669 376 374 29.40% $7,507.62 9.29 ¢

Minimum 28   49,600 49,600 1,550 264 242 19% $5,141.61 7.84 ¢

Example: Fossil Ridge High (Fort Collins, CO)

Typical Lighting Load Profile

Colorado Springs School District

“One of the primary focuses of the Performance Contract executed at Colorado Springs D11 was limiting facility demand at 4 sites to ensure that the schools could take advantage of the lower rate class. The real-time energy monitoring upgrades on-site allow the district energy manager to ensure this strategy is effectively executed. An added benefit of the technology is the ability to better diagnose malfunctioning equipment or maintenance needs in a proactive manner.”