Kelvin Kelly - Business Edge - FORMAZIONE ED ESAMINAZIONE SUGLI F-GAS, QUALIFICHE PER I REFRIGERANTI...

XV EUROPEAN CONFERENCE MILANO 7th-8th JUNE 2013 CSG

Latest Technology in Refrigeration and Air Conditioning Under the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERS



Business Edge Ltd

• Kelvin Kelly Training Director



Business Edge Ltd

• Leading Technology Training Company1990 - 2012. Numerous Air Conditioning, Refrigeration and Building Services Courses.

• Distributor of Specialist Equipment– Climacheck Performance Analyser.– Fri3Oil Flushing Technology.– AC&R Software Products.

• Trouble-Shooting & Fault-FindingWater Chillers, DX Systems, Multi-Split, VRF Systems, AHU`s, etc.

• Legal and Arbitration WorkSuccessful legal settlements up to £1.25M based on Expert

Technical Witness capabilities. £4M case underway.



Business Edge Clients Include…….



Training in the use of Low GWP Refrigerants



1830 1930 1990 2010

Safety and durability

Cooling by any method

Protect the ozone layer

Reduce Global Warming

SO2, NH3, CCL4, H2OHC, ethers

CFC, HCFC, HFC,NH3, H2O…

(HCFC), HFC, NH3,HC, H2O, CO2

HFC, HC, HFO,NH3, H2O,..

Refrigerant Overview

ODP=0, but high GWP

ODP=0 GWP lowor ultra low

ODP and GWP

CFC HCFC HFC Low GWP

Very highODP and GWP



Regulation 842/2006

• Adopted in the UK 4/7/07• First UK training courses February 2009• Approx. 20+ thousand certified UK personnel• This equates to nearly 85% completed• However we are still running courses every

month!• Update to include alternative technology.



Low GWP Training for Stationary Equipment



Low GWP Training Courses

• City and Guilds 6187.– Hydrocarbon system installation, testing,

servicing and maintenance.– CO2 system installation, testing, servicing

and maintenance.– Ammonia system installation, testing,

servicing and maintenance.



Refrigeration Comparison

Fluid ODP GWP Efficiency Flammability Toxicity Fluid Cost

Equip Cost

CFC

HCFC

HFC

HFO

HC

NH3

CO2



Refrigerant Characteristics

• Hydrocarbon refrigerants :– Asphyxiant

– Flammable

– Low Global Warming Potential

– High efficiency

– Cheap

– Low Compression ratio (high suction, low discharge pressures)

– High heat transfer in heat exchangers

– Reduced system pressure losses (lower refrigerant density and viscosity)

– Non Stenched (no smell)



Practical Assessments

• Recovery of Flammable Refrigerants.• Partial evacuation/purging with inert gas.• Ensuring flammability limits are not reached.• Brazing of system components.• Pressure strength/tightness testing.• Evacuation/De-Hydration.• Charging of systems.• Leak testing



Low GWP Training for Stationary equipment



HC Recovery

• The area must be well ventilated• No source of ignition within 3m• Forced air ventilation is recommended,

using a EX rated fan motor with

a 5m cable to ensure switching

is provided outside of 3m zone.• A HC leak detector must be used

throughout the process

(cannot have a zero function

must alarm at 20% LFL)

Fill system with OFN

3m

5m



Theoretical Assessments

• Characteristics of Hydrocarbons.• Occupancy classes (EN 378).• Refrigerant charge calculations.• Flammability limits.• Legislation and European Standards



Location Refrigerant LFL (kg/m³) Max Charge (kg)

Floor (0.6m)Window (1.0m)Wall (1.8m)Ceiling (2.2m)

R600a HC

0.043 0.1350.2260.4060.496


R290HC

0.038 0.1160.1930.3480.425


R1234yfHFO

0.299 1.5292.554.595.61


R32HFC

0.307 1.582.634.745.79



Low GWP Training for the Automotive Industry




Business Edge Ltd is carrying out a range of training courses for the Automotive Industry to prepare them for the widespread adoption of HFO Refrigerants.






Automotive HFO-1234yf

• HFO-1234yf accepted for use in automotive AC– - Safe for use; low environmental

impact– HFO-1234yf selected by most Auto OEMs

globally to meet EU MAC Directive• Now commercially available for new model

types




The main concern is the lack of skills with regard to the handling of mildly flammable refrigerants.



Practical Concerns

• Systems are poorly labelled.

• Potential to add HFO couplers to a R134a Recycling unit causing contamination to the unit and subsequent vehicles.



Practical Training Concerns



Practical Training Concerns

• It is therefore important to ensure adequate Training takes place.

Date post:	20-Jan-2015
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