Energy and Environment Expo Presentation - Indoor Air Quality for Buildings for Health , Personal Comfort and Working Efficiency

Paul Newton Ltd June 2014
Indoor Air Quality for Buildings
For Health , Personal Comfort and
Working Efficiency
Optimising Building Air Systems
Energy and Running cost
reductions

Clean air solutionsClean air solutionsClean air solutions
Camfil’s business concept – clean air
Our business concept is to deliver
value to customers all over the world
while contributing to something
essential to everyone – clean air

Outdoor Air Pollution
Particles:
Traffic combustion particles, Power Stations, Pollen
Definition of size: 0.01 – 100 µm
• PM 2.5
• PM 10
Gases:
Random movement, molecular size
Gas molecule size < 0.001 µm
• Nitrogen Dioxide
• Ozone
• Sulphur Dioxide
• VOCs

Indoor Air Pollution
• We spend 90% of our time inside
• 50 % of all particles inside come from
outdoor air – Heating and Traffic particles
• 50 % are generated from indoor sources –
Building materials, cleaning products, air
fresheners
• A big part of the population lives and works
in areas where rates of particles exceed
WHO guidelines regarding PM2.5
(10ug/m3/year)

How small are these particles?

Comfort Air Filters
A healthy and beneficial climate
• Offices
• Hotels
• Schools
• Shopping centres
• Conference centres
• Airports

Results of poor Air Filtration in Ventilation Systems
• Air flows reduced
• Ducts filled with fine dust resulting in
micro organism growth
• Heating and cooling coils blocked
• High cleaning and Energy costs
• Indoor Air Quality issues for Health

Air Handling Unit energy flow
Pre-filter
Secondary-filter
Intake Air
Frost coil
Supply Air
Damper
Heating coil
Cooling coil
FAN
MOTOR
Gas-filter (Carbon)
Attenuator
OUTSIDE INSIDE
Electrical Energy
input via motor

Air Filter - Energy Equation
Calculations reveal that energy normally accounts for 70% of the total life cycle
cost of the system. The energy consumption is directly proportional to the average
pressure drop over the filter.
Energy (E) = [(Q x ∆P x T)/(ŋ x Co)] . Pc
• Q: Air flow, m3/s
• ∆P: Average filter pressure loss, Pa
• T: Operation time, hr
• ŋ: Fan efficiency, %
• Pc: Cost of Power, p/kWh
• Co: Constant, 1000 in SI units

IndoorAirQualityforBuildings11
Low Energy Air Filter Solutions
Carbon Filters:
’Citysorb’ (Gas)
’Citycarb’ (Gas+Particle)
Single Stage Bag
Solution
’Hi-Flo’
Primary Filter
’30/30’
Secondary Rigid
Compact Filter
’Opakfil Energy’
Eurovent Energy Rated
Products

Air Filter - Life Cycle Costing model
The life cycle cost for the filter is the cost of:
Low Cost Filter Low Energy filter
1. Filter purchase 12% 35%
2. Labour 12% 11%
3. Energy used 70% 50%
4. Waste Disposal 6% 4%
= Total Cost of Ownership

Camfil Software -
Life Cycle Costing Calculation for Air Filters
Parameters the software includes:
• Type of filters in use: Outside air condition
• Airflow rates
• Number of filters in the air-handling units
• Current change out conditions
• Current energy cost
• Installation cost
• Disposal and cleaning cost

Air Filter Standards and Guidelines
IndoorAirQualityforBuildings14
Current Test Standard BS EN779 : 2012
Air Filter particle efficiency
Indoor Air Quality Standard: BS EN13779 : 2007
Particle and Gas Phase Filtration guidelines
Ventilation for buildings BS EN15780 : 2011
Inspection regimes - Internal Cleanliness of Ventilation Systems
Eurovent Certified Air Filters
New Energy grading for filters ratings from A to G

Air Handling Unit demonstrator shows live data energy savings with
Low Energy Air Filter optimisation
Air Filter Energy Savings - Demonstration

Fan Motor Energy Reduction
Maximum AHU system energy conservation comes from a dual strategy of
optimising static components, and use of a Variable Speed Drive (VSD) or
Inverter to the fan motor:

Indoor Air Quality for Buildings 17
Stand alone portable air
cleaners provide a practical
health and economic solution
Fast response and portable to give
Clean Indoor Air Quality
CamCleaner – Air Purifier

Results of Good Indoor Air quality
Consequences on productivity and absenteeism
• Productivity can be improved by 10% in the workplace
from better indoor air quality
• Improved ventilation systems can save 400 Euros per
year per employee
• Reduce sick leave rate by 30%
* INIVE - International Network for Information on Ventilation and Energy Performance

Indoor Air Quality for Buildings 19
Questions?
peter.dyment@camfil.co.uk

Energy and Environment Expo Presentation - Indoor Air Quality for Buildings for Health , Personal Comfort and Working Efficiency

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