Campden BRI Energy - Filtering Energy Costs in Food Processing

Clean air solutions

THE CAMFIL GROUP

Peter Dyment

Filtering Energy costs in Food processing

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Clean air solutionsClean air solutionsClean air solutionsClean air solutionsClean air solutions

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Camfil worldwide

2013 Group sales of £450m3,380 employees24 production plantsSales companies in 25 countriesAgents 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 samplersNicholas J. Stanley,*" Thomas H. Kuehn," Seung Won Kim,* Peter C. Raynor,*Senthilvelan Anantharaman,' M. A. Ramakrishnanc and Sagar M. GoyalcReceived 14th December 2007, Accepted 19th February 2008First 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) filtersJames E. Farnsworth,*ab Sagar M. Goyal,c Seung Won Kim,d Thomas H. Kuehn,bPeter C. Raynor,d M. A. Ramakrishnan,c Senthilvelan Anantharamanc andWeihua TangbReceived 3rd May 2006, Accepted 4th August 2006First published as an Advance Article on the web 6th September 2006

Detection of viruses in used ventilation filters from two large public buildingsSagar M. Goyal, DVM, PhD,a Senthilvelan Anantharaman, DVM, PhD,a M. A. Ramakrishnan, DVM, PhD,aSuchitra Sajja, PhD,a Seung Won Kim, PhD,b Nicholas J. Stanley, MS,c James E. Farnsworth, MS,c Thomas H. Kuehn, PhD,cand 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


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

BenefitParticle Reduction of 78% between Outside and Inside Air

Particle Reduction to Supply Air also byEffective Air Filtration


Airtight building testing

Indoor Air Quality in Buildings

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Airtight building envelope testing is becoming a requirement for many new-build projects

BSRIA Air 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/year1000η

tdPqE

q = Air flow (m3/s)

dP = Pressure drop (Pa)

t = Operating time (hours/year)

h = Fan efficiency (20% - 65% ?)

The Energy Calculation


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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

© CAM

FIL

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Air Handling Unit air and 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


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 periodData 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



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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



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• 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


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Low Energy Air Filter Service Packages

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© CA

MFIL

2023-04-11

• 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.



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THANK YOU ANY QUESTIONS?

Download our APP from Google PlayFor 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.ukwww.camfil.co.uk

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Date post:	10-May-2015
Category:	Food
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