Clean air solutions for food processing facilities

Clean air solutions
THE CAMFIL GROUP
Peter Dyment
Filtering Energy costs in Food processing

Clean air solutionsClean air solutionsClean air solutionsClean air solutionsClean air solutions
2
Camfil worldwide
2013 Group sales of £450m
3,380 employees
24 production plants
Sales companies in 25 countries
Agents and representatives in more than 50 countries
Clean air should be a human right

Simply put - We need clean air - clean water and food safe to eat
Air to breathe without risk to health
Air to prepare food free from
airborne contamination
Food ingredients and water
protected from sources of
contamination
Environmental controls are
necessary in commercial food and
beverage preparation areas

Building Energy Efficiency
with Indoor Air Quality
Typically 50% of Energy
use in Large Buildings is in
the HVAC systems
Urban air quality is typically
above WHO annual warning
levels for PM2.5 and NO2.

Air as a vector of cross contamination concerns base factors
Care needs to be taken
at a base level to avoid
risk and ensure an
effective solution

1. Clean air that can be inhaled without risk to health. LOW -
PM2.5 LOW - NOx LOW - O3 LOW – SOx Use Air filters
recommended by EN13779:2007 and tested to EN779:2012
class F7 to F9
2. Temperature 20-22 deg.C. Comfortable for purpose
3. Relative Humidity should be within 45% to 55%
4. Ventilation rate sufficient to dilute CO2 and maintain O2
5. Check building envelope has low leakage
6. Check HVAC plant is fit for purpose, well maintained. Suitable
controls and control strategy.
Indoor Air Quality from the HVAC AHU system
Note: for environmental
control lighting and noise
levels are also important

Effective Air Filtration can reduce risk of cross contamination
Issues that need to be addressed for optimised air filter selection and use.
1. Are the AHU air filter mountings fit for purpose to minimise air bypass and
adequately engineered ? Ref: BS EN 1886:2007
2. Is the filter position in the system correct to deliver clean air and protect system
efficiency. Have a system survey if you are not sure. Ref: OAS
3. Choose correct Filter media and type to deliver consistent life performance at
required particulate efficiency with minimum use of energy, servicing and other
related costs. Ref: BS EN1822:2009 BS EN779:2012 BS EN13779:2007 LCC
4. Select Air Filter configuration for (Bag, Compact) for safe stable performance
with minimum stages and include gas phase filtration with particulate filtration
when required.

Bypass of unfiltered air depositing dust particles on coils downstream

Background culturable bacteria aerosol in two large public buildings using HVAC
filters as long term, passive, high-volume air samplers
Nicholas J. Stanley,*" Thomas H. Kuehn," Seung Won Kim,* Peter C. Raynor,*
Senthilvelan Anantharaman,' M. A. Ramakrishnanc and Sagar M. Goyalc
Received 14th December 2007, Accepted 19th February 2008
First published as an Advance Article on the web 7th March 2008
Development of a method for bacteria and virus recovery from heating,ventilation,
and air conditioning (HVAC) filters
James E. Farnsworth,*ab Sagar M. Goyal,c Seung Won Kim,d Thomas H. Kuehn,b
Peter C. Raynor,d M. A. Ramakrishnan,c Senthilvelan Anantharamanc and
Weihua Tangb
Received 3rd May 2006, Accepted 4th August 2006
First published as an Advance Article on the web 6th September 2006
Detection of viruses in used ventilation filters from two large public
buildings
Sagar M. Goyal, DVM, PhD,a Senthilvelan Anantharaman, DVM, PhD,a M. A. Ramakrishnan, DVM, PhD,a
Suchitra Sajja, PhD,a Seung Won Kim, PhD,b Nicholas J. Stanley, MS,c James E. Farnsworth, MS,c Thomas H. Kuehn, PhD,c
and Peter C. Raynor, PhDb St. Paul and Minneapolis, Minnesota
Conclusions: airborne virus and bacteria can be tested for and
recovered from HVAC air filters in both supply and extract systems
How can we find out if airborne bacteria and virus are present ?

Healthvent EU Project Report 2013

Example of operating
theatre supply air
system
Poorly maintained and
poorly engineered
systems present
opportunity for microbial
growth and a route for
airborne contamination

Airborne Contaminants can be removed
at source by use of standalone
systems.
Particle and Gas phase filtration can be
used.

There is a process engineered
solution to control risk of
contamination
Using innovative air
filtration for the food
processing industry

Prosafe
Opakfil
Hi-Flo
Hi-Cap
Food Safety and
Protection Opakfil

An airtight building envelope and effective air filtration
can prevent ingress of air pollution for clean IAQ
Particles counted are mainly toxic fine combustion particulates from traffic
Benefit
Particle Reduction of 78% between
Outside and Inside Air
Particle Reduction to
Supply Air also by
Effective Air Filtration

Airtight building testing
IndoorAirQualityinBuildings17
Airtight building envelope testing is becoming a requirement for many new-build projects
BSRIAAir Tightness for compliance to Part L1 and L2 building regulations. Member of ATTMA, the
appointed air pressure testing organisation for the BINDT
Once the air tightness of a building
envelope is known it is possible to assess
the required air change rates to give
adequate ventilation.
Carbon dioxide reduction along with other
internal background gas phase pollutants
can be achieved.

This equation calculates the kilowatt hours consumed by an element of a
ventilation system based upon average pressure loss
 kWh/year
1000η
tdPq
E



q = Air flow (m3/s)
dP = Pressure drop (Pa)
t = Operating time (hours/year)
h = Fan efficiency (20% - 65% ?)
The Energy Calculation

19
How we optimise our
Low Energy Air Filter selection
A Hi-flo F7 M7 Bag filter
with 9.2 M2 of micro-fibre
media has the optimum low
pressure drop and
consistent high particulate
efficiency with a longer
working life
BS:EN13779:2007 advises F7 minimum efficiency

Air Handling Unit air and 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

These steady state reductions can be improved by use of demand led controls and time clocking
Maximum AHU system energy conservation comes from a dual strategy of
optimising static components then use of an inverter speed control on fan
motor

Energy Reduction confirmed optimizing with Low Energy Air Filters
21% Reduction in fan
motor energy
North AHU with
Low Energy Air Filters
(micro-fibre glass)
South AHU Original
Synthetic medium Air
Filters

An Air Handling unit demonstrator shows that there is Huge potential
ECO savings with air filter optimisation (LEAF) and Fan speed control

Air Handling unit demonstrator Real Life results show
‘single figure’ deviation only for fan motor speed control

Annual Savings – for a 10 m3/s system
Element % Kwh £ Revenue or capital Payback
Upgrade filters 22% 6000 600 Revenue < 3 months
Clean coils 10% 2500 250 Revenue < 6 months
Upgrade fans 35% 60000 6000 Capital > 24 months
Upgrade chillers 40% 136000 13600 Capital > 36 months
Table is prioritised by payback period
Data source – EECO2 Energy Efficiency Consultants (Low Carbon Consultants)
Note: A payback time of less than 12 months is a ‘no brainer’ decision to implement
Renewable energy options are in excess of ten years and in some cases over fifty years
Incremental Benefits – ISO 50001 Energy management
Motivation – financial efficiency

HiFlo M7 Bag filterCity-Flo Bag filter
Citycarb compact filter Citysorb compact filter
Low Energy Air Filters consistent and effective IAQ performance
•Low Energy Air Filters
with EN13779:2007
performance F7 to F9
•Gas filtration also to
EN13779:2007 when
required.
• Micro-fibre glass medium
performs consistently for
up to 2 years.
•Low operating pressure
drop for best energy
efficiency.
•Minimal maintenance and
disposal costs

•Particle filtration
•Gas filtration
•Without upgrading
the main HVAC system
•Energy efficient
Stand alone portable air cleaners provide a practical
health and economic solution
Mix recirculation and supply air
Fast response and portable to give
Clean Indoor Air Quality

Monitoring of airborne particle concentrations can enable informed control strategy

30
Low Energy Air Filter Service Packages
30
• Low Energy Air Filter AHU
filter mounting upgrades
• Complete Low Energy Air
Filter installation and
maintenance contracts
• AHU filter monitoring with
demonstration of benefits
• Additional Duct cleaning and
coil cleaning AHU system
packages.

32
THANK YOU
ANY QUESTIONS?
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For more information about clean air solutions, improving air quality,
low energy air filters, AHUs (Air Handling Units) and the EPBD, visit
www.lowenergyairfilter.co.uk
www.keepthecityout.co.uk
www.camfil.co.uk
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Clean air solutions for food processing facilities

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