1. Toward a Sustainable Campus Part II: Improving the Efficiency of the CNS Building Energy Systems Nitin Rajan ‘07 Physics Department Ithaca College

2. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 2 Introduction  To understand the energy use of the CNS building in order to find ways to improve its efficiency, thereby decreasing our footprint  Main Question: Can we make the building Kyoto compliant? Can we make the energy systems more efficient, saving money and decreasing our greenhouse gas emissions?

3. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 3 Focus: Heating, Ventilation, and Air Conditioning (HVAC)  Electricity Usage  Heating Fuel Usage  Reduce energy waste

4. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 4 CNS HVAC Energy Use  Heating (Boiler) energy  849 million therms (measured)  849 million therms (measured)  Cooling (Chiller) Energy  0.3 Million kWh/yr (estimated)  0.3 Million kWh/yr (estimated)  Ventilation (Fan) Energy  3 Million kWh/yr (estimated)  3 Million kWh/yr (estimated)  Energy Comparisons  On average a household uses 1000 kWh of energy per month  On average a household uses 1000 kWh of energy per month

5. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 5 Where is all this energy going?  Boilers and Chillers with huge capacities (5 MW and 2.5 MW respectively) (5 MW and 2.5 MW respectively)

6. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 6  Air Handler Units (AHU)  The 3 main air handlers together  The 3 main air handlers together supply 150 000 Cubic Feet supply 150 000 Cubic Feet of air per minute of air per minute  Condition and distribute the air coming from outside to control inside air quality  Condition and distribute the air coming from outside to control inside air quality  Ventilation and Exhaust Fans to move the air through and out of the building

7. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 7 What Happens in an Air Handler Pre-Heat Humidifying Cooling AIR INTAKE To Rooms Approx. 30% of heating energy Approx. 20% of heating energy Approx. 50% of heating energy

8. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 8 HVAC System

9. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 9 Fume Hoods

10. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 10 Fume Hoods  One source of energy waste identified  Around 100 of them in CNS building  Around 30 were on unnecessarily every time we ran a check

11. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 11 Energy Consumed by Fume Hoods  Difficult to determine how long they are actually left on  Weather conditions vary day by day  For a fume hood left on UNNECESSARILY for 10 hours on a particularly cold day, Energy wasted = 100-300 kWh Energy wasted = 100-300 kWh  Which represents 3-9 days of energy use by an average house

12. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 12 Impact of one fume hood Here is how much energy they waste –Cost in dollars: $7 for that one day –Cost in GHG emissions: 79 lbs of CO 2 for that one day

13. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 13 Answer to Main Question  Yes, we can work towards making this building Kyoto compliant  Turning off fume hoods represents a huge first step in decreasing CO 2 emission  x% reduction in annual CO 2 emission just from turning fume hoods off  x% reduction in annual CO 2 emission just from turning fume hoods off

14. April 2005 Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark 14 Next Steps  Request to Lab users:  Turn the fume hoods off if you do not need them  Turn the fume hoods off if you do not need them  Sensitize other people as to how wasteful fume hoods can be if not used wisely  Sensitize other people as to how wasteful fume hoods can be if not used wisely  More regular checks to be performed  Further analysis of the system