Estate Management

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Fan PowerHEEPI Conference Cutting Energy Use
with Variable Air Volume (VAV) in Labs, Hospitals
and Other Heavily Serviced Spaces
Chris Lawrence, ME Services Advisor/Project
Manager 14 May 2009
Estate Management
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Fan Power Energy Reduction

• Fan Power Targets for BREEAM
• Fan Power Definitions
• Comparative Figures
• Energy Reduction in Labs HVAC

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Fan Power

• Table of BREEAM Specific Fan Power Targets for
  Labs

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Fan Power Energy Reduction

• Basis of Fan Power Statistics

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Fan Power Energy Reduction

• SFP basis of targets
• Data to be added

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Fan Power Energy Reduction

• Definition of Specific Fan Power
• SFP
• W/l/s or kW/m3/s

Total input power (W or KW) Electrical Total
airflow (litres per second or m3/s)
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Fan Power Energy Reduction

• Fan System

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Fan Power Energy Reduction

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Fan Power Energy Reduction

• Other definitions of SFP
• Airflow / Absorbed power
• Airflow / Motor power

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Useful information?

• The extra CO2 produced to aircondition a typical
  office building every year is enough to fill
  around 30 hot air balloons.
• Replacing old inefficient fluorescent tubes in a
  typical small office with newer slimline tubes
  can save the equivalent weight in CO2 as 3
  average adult men.
• Lowering the temperature in a typical office
  building by just 1oC would save enough energy to
  power 13,600 standard washing machine cycles.

• Replacing10 standard light bulbs with equivalent
  low energy bulbs saves enough CO2 to fill at
  least 3000 milk bottles.
• A computer switched off at night weekends will
  save an equivalent amount of energy to make over
  21,000 cups of coffee.
• Making good use of daylight in typical small
  office saves enough CO2 to fill a double decker
  bus.

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Fan Power Energy Reduction

• Examples

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Fan Power Energy Reduction

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Fan Power Energy Reduction

• Decreasing Fan power
• Cross sectional area of Air Handling Units
• Coils
• Filters
• Attenuators
• Larger duct sizes
• Simplify duct layout
• Consider commissioning in design of duct system
• Measure it meter it monitor it

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Fan Power Energy Reduction

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Fan Power Energy Reduction

• Fume extract systems
• Reduce fume cupboard face velocities
• Specific low velocity design
• When unattended or not in us
• User guidance on use of fume cupboard sashes
• Avoid bypass air both at fume cupboard and at
  fan

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Fan Power Energy Reduction
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Fan Power Energy Reduction

• Sustainable Laboratories
• Is there such?
• Can we be more or less sustainable? Is
  sustainability relative?

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Fan Power Energy Reduction

• SFP in HE BREEAM for Labs
• Definitions of SFP
• Examples
• Reducing Fan Power
• Lab Categories Strategies
• Chris Lawrence
• Estate Management Major Projects
• ME Services Advisor / Project Manager