Indoor Air Quality for Buildings - Paul Newton (Camfil) - Energy & Environment Expo, 18 June 2014

Paul Newton Ltd June 2014

Indoor Air Quality for BuildingsFor Health , Personal Comfort and Working Efficiency

Optimising Building Air SystemsEnergy 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, PollenDefinition of size: 0.01 – 100 µm• PM 2.5 (particulate matter with an aerodynamic diameter

of up to 2.5 µm)• PM 10 (particulate matter with an aerodynamic diameter of

up to 10 µm)

Gases:Random movement, molecular sizeGas 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?


Presentation Title 6

Comfort Air FiltersA 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-filterSecondary-filter

Intake Air

Frost coil

Supply Air

DamperHeating 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 ΔP x T)/(ŋ x Co)] . Pc

• Q: Air flow, m3/s• ΔP: Average filter pressure loss, Pa• T: Operation time, hr• ŋ: Fan efficiency, %• Pc: Cost of Power, p/kWh• Co: Constant, 1000 in SI units


Indoor Air Quality for Buildings

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Low Energy Air Filter Solutions

Carbon Filters:’Citysorb’ (Gas)’Citycarb’ (Gas+Particle)

Single Stage BagSolution’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 GuidelinesIndoor Air Quality for Buildings

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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 : 2011Inspection 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?

[email protected]

Education

Indoor Air Quality for Buildings - Paul Newton (Camfil) - Energy & Environment Expo, 18 June 2014