Toward a sustainable campus part ii improving the efficiency of the cns building energy systems
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Toward a Sustainable Campus Part II: Improving the Efficiency of the CNS Building Energy Systems. Nitin Rajan ‘07 Physics Department Ithaca College. Introduction.

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Toward a Sustainable Campus Part II: Improving the Efficiency of the CNS Building Energy Systems

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Toward a sustainable campus part ii improving the efficiency of the cns building energy systems

Toward a Sustainable Campus Part II: Improving the Efficiency of the CNS Building Energy Systems

Nitin Rajan

‘07

Physics Department

Ithaca College


Introduction

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?

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Focus heating ventilation and air conditioning hvac

Focus: Heating, Ventilation, and Air Conditioning (HVAC)

  • Electricity Usage

  • Heating Fuel Usage

  • Reduce energy waste

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Cns hvac energy use

CNS HVAC Energy Use

  • Heating (Boiler) energy

     849 million therms (measured)

  • Cooling (Chiller) Energy

     0.3 Million kWh/yr (estimated)

  • Ventilation (Fan) Energy

     3 Million kWh/yr (estimated)

  • Energy Comparisons

    On average a household uses 1000 kWh of energy per month

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Where is all this energy going

Where is all this energy going?

  • Boilers and Chillers with huge capacities

    (5 MW and 2.5 MW respectively)

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Toward a sustainable campus part ii improving the efficiency of the cns building energy systems

  • Air Handler Units (AHU)

     The 3 main air handlers together

    supply 150 000 Cubic Feet

    of air per minute

     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

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


What happens in an air handler

Pre-Heat

Humidifying

Cooling

What Happens in an Air Handler

AIR INTAKE

Approx. 50% of heating energy

Approx. 30% of heating energy

Approx. 20% of heating energy

To Rooms

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Hvac system

HVAC System

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Fume hoods

Fume Hoods

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Fume hoods1

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

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Energy consumed by fume hoods

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

  • Which represents 3-9 days of energy use by an average house

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Impact of one fume hood

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 CO2 for that one day

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Answer to main question

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 CO2 emission

    x% reduction in annual CO2 emission just from turning fume hoods off

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


Next steps

Next Steps

  • Request to Lab users:

     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

  • More regular checks to be performed

  • Further analysis of the system

Nitin Rajan, Allison Krasnow, Jon Harrod, Beth Clark


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