understanding energy use
DESCRIPTION
Understanding Energy Use. Frank Rendina NYPD. The Police Academy. Possible Causes. Additional steam consuming equipment Leaks in the steam lines Leaky steam traps Faulty equipment. Typical Hourly Usage. Operating Characteristics of Facility. Classes are held 18 hours/day - PowerPoint PPT PresentationTRANSCRIPT
Understanding Energy Use
Frank RendinaNYPD
The Police Academy FY 2013 FY 2014
FY 2012 FY 2013
Jun-2013 Jul-2013 Aug-2013 Jun-2012 Jul-2012 Aug-2012 %Increase
June% Increase July
% Increase August
Electricity Cost ($)
$61,987.32 $74,456.47 $63,572.75 $68,647.81 $75,779.87 $61,224.27 -9.70% -1.75% 3.84%
Electricity Demand (KW)
1,020.24 1,057.20 949.20 1,020.24 1,078.08 1,028.88 0.00% -1.94% -7.74%
Electricity Usage (KWH)
421,600.00 530,000.00 486,000.00 446,400.00 486,400.00 478,800.00 -5.56% 8.96% 1.50%
Steam (mlbs) 107.00 79.00 143.00 76.00 58.00 67.00 40.79% 36.21% 113.43%
Steam Cost ($) $9,183.25 $9,202.01 $9,533.60 $7,449.88 $7,821.97 $7,419.64 23.27% 17.64% 28.49%
Total Cost ($) $71,170.57 $83,658.48 $73,106.35 $76,097.69 $83,601.84 $68,643.91 -6.47% 0.07% 6.50%
Total Usage (mmBTUs)
1,558.45 1,897.13 1,818.46 1,608.46 1,724.87 1,708.98 -3.11% 9.99% 6.41%
Possible Causes
• Additional steam consuming equipment• Leaks in the steam lines• Leaky steam traps• Faulty equipment
Typical Hourly Usage
08/22/2012 00:00
08/22/2012 01:00
08/22/2012 02:00
08/22/2012 03:00
08/22/2012 04:00
08/22/2012 05:00
08/22/2012 06:00
08/22/2012 07:00
08/22/2012 08:00
08/22/2012 09:00
08/22/2012 10:00
08/22/2012 11:00
08/22/2012 12:00
08/22/2012 13:00
08/22/2012 14:00
08/22/2012 15:00
08/22/2012 16:00
08/22/2012 17:00
08/22/2012 18:00
08/22/2012 19:00
08/22/2012 20:00
08/22/2012 21:00
08/22/2012 22:00
08/22/2012 23:00
0
50
100
150
200
250
300
350
400
450
Steam Usage (Mlbs)
Steam Usage (Mlbs)
Operating Characteristics of Facility
• Classes are held 18 hours/day• Facility has cadets, Traffic, School Safety and
civilian classes all through the day.• Classes end by midnight.
The Showers
Existing System
The Solution
• Install low flow shower heads• Include individual isolation valves
The Calculations• Typical flow = 3.5 gallons/min• Q= M C Delta T• Q for 1 faucet= 78,750 BTU/hr• Q for 55 faucets= 4,331,250 BTU/hr
• Typical flow = 5 gallons/min• Q= M C Delta T• Q for 1 faucet= 112,500 BTU/hr• Q for 10 faucets= 1,125,000 BTU/hr
Combined Q= 5,456,250 BTU/hr
The Energy SavingsAssumption:15% the total number of showers are used during the day.
Potential Savings using 2.0 gpm shower heads only:56,953,125 BTU/Month
Potential Cost Savings for August:$4,422.90
Lessons Learned
• Understand how the building is being used• Expect the unlikely• Exhaust all avenues• Have fun doing it
Questions