This document discusses basics of energy management for schools, including ways to reduce rising utility costs and carbon footprint. It provides information on obtaining energy data, converting voltage to kilowatts, calculating heating and cooling degree days, and sizing buildings. Methods outlined for managing energy use include controlling demand, optimizing HVAC equipment and set points, collecting data, and utilizing backup generation and variable frequency drives. The document also discusses lighting improvements and alternative energy options.

1. Basics Of Energy Management: For Schools *Not intended for reuse, please do not copy

2. Why Energy Management? Reduce & Manage Rising Utility Costs Reduce over all cost of operation Reduce Carbon Footprint

3. Building Envelope

4. Energy Conversions

5. Obtaining Energy Data Time Schedule/AHU/RTU/Fancoils Kilowatt usage Cooling degree days Heating degree days Water usage/sewer

7. Utilities Spreadsheet Year Units January February March April May June July August September October November December 2007 kW Demand 840 866 1295 1299 1321 1432 1340 1198 1421 1403 1196 913 kWh Usage Information was unable to be obtained 2008 kW Demand 744 706 673 1150 1143 1095 1037 1143 1211 938 803 616 kWh Usage 121,040 128,000 104,960 114,120 129,600 103,760 106,160 107,520 111,600 101,760 108,720 121,840 2009 kW Demand 647 656 639 648 713 801 729 653 625 683 673 720 kWh Usage 102,400 113,520 108,240 95,200 110,560 100,879 114,741 104,220 117,280 102,350 105,268 97,600 2010 kW Demand 639 635 654 623 462 713 747 606 577 655 637 662 kWh Usage 97,600 114,720 114,240 100,800 95,200 110,560 144,000 109,040 96,960 115,600 114,000 96,320

8. Kw Demand

9. Kwh Usage

11. Convert Volts to Kw Chiller 480V ∙ 1.732 = 831.36 (3 phase v) 831.36 . 600A = 498,816 ( watts) 498,816 Watts 1,000 Kw 498.816 Kw ∙ (Power Factor) ∙ 8 = 399 Kw Use 0.85 single phase ~ = 498.816 Kw

12. Heating Degree Day (HDD) Cooling Degree Day (CDD) Example: Base for Computing HDD & CDD is 65°F Take 65°F – High Temp of the Day HDD = (65°F – 50°F) 15°F ∙ 3 Days = 45 degree days

13. To Size a Building How many bTu/hr? (Elementary) Take temp of Rm @ 72°F - 32°F This is where bTu starts (40°F difference) 40 degrees ∙ SqFt of building (57,240 SqFt) 2,289,600 bTu/hr

14. CO² Reduction Example: Take Kw (Chiller) 399 Kw ∙ 6 hrs (event drop) = 2394 Kwh 2,394 Kwh ∙ (0.000718) MT = 1.71 MT/CO 2 2,195.12 MT ∙ 1.71 MT/CO 2 = 3,773.12 lbs/CO 2 1 Car = One MT/CO 2 or 2,000 lbs

15. Load Factor Facility used 50,000 Kwh in 30 day billing period / demand of 100 kw Kwh = 50,000 Kwh Kw ∙ number billing hrs in pay period 30 days ∙ 24 hrs = 720 hrs Kwh = 50,000 Hr = 720 = 0.69% Load Factor

16. How to Manage Your Facility Controlling your Demand Automation System Scheduling Occupied & Unoccupied set points

18. Using HVAC Equipment to Better Manage Your Facility Creating Air Conditioning / economizer VFD Variable Frequency Drive Set points

19. Collecting Measurable Data with use of Data Loggers

20. Data Logger Calculation

21. Back-Up Generation Areas of utilizing back-up generation to lower building demand

22. Creating Air conditioning Set Points

23. Load Profile Report For Middle School 5/2011

24. Middle School

25. Load Profile Report For Elementary School 5 /2011

26. Elementary School

27. Boilers & Hot water Heaters / Pumps VFD Variable Frequency Drives Set Points

28. Lighting ~How & Where Can We Improve T-8 vs T-12 Sight Lighting Day Light Harvesting

29. Where Do We Go From Here! Future Alternative Energy Solar Energy Wind Energy Transportation Reduction of Carbon Footprint

31. Time For Questions and Answers Ron Marinelli Email: marinellir@lopatcongschool.org Phone: 908-213-2995 ext. 2510