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There were a number of objectives which had to be achieved from Steve Smith’s ‘regional road show’: (click) Teachers from the refrigeration sections in.

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Presentation on theme: "There were a number of objectives which had to be achieved from Steve Smith’s ‘regional road show’: (click) Teachers from the refrigeration sections in."— Presentation transcript:

1 There were a number of objectives which had to be achieved from Steve Smith’s ‘regional road show’:
(click) Teachers from the refrigeration sections in regional TAFE NSW Colleges received ‘Train the Trainer’ sessions to ensure expertise in natural refrigerant training was spread across regional NSW, and refrigeration technicians in the regions will be able to go to their local TAFE College to learn these skills. The ‘Train the Trainer’ Sessions commenced in Newcastle on the 13th August 2009; the picture shown is taken from one of those sessions. (click twice) Staff from Coca Cola Amatil joined TAFE teachers to learn about Refrigerants: Appliances and Heat Pump Systems Using CO2.,at 3 locations, including Queanbeyan In-depth training sessions in Refrigerants: Appliances Using Hydrocarbons were conducted for regional refrigeration technicians in: the ACT, to capture regional refrigeration technicians from south eastern NSW; and (click) in Wagga Wagga, where a new Refrigeration Section will eventually be set up. (click x 4) ‘Train the Trainer’ sessions were conducted at regional locations where the local TAFE College had a Refrigeration Section (Tamworth, Taree, Grafton, and Bathurst). Information Sessions for regional Refrigeration Technicians were held in other strategic regional location, including Dubbo.

2 There were a number of objectives which had to be achieved from Steve Smith’s ‘regional road show’:
(click) Teachers from the refrigeration sections in regional TAFE NSW Colleges received ‘Train the Trainer’ sessions to ensure expertise in natural refrigerant training was spread across regional NSW, and refrigeration technicians in the regions will be able to go to their local TAFE College to learn these skills. The ‘Train the Trainer’ Sessions commenced in Newcastle on the 13th August 2009; the picture shown is taken from one of those sessions. (click twice) Staff from Coca Cola Amatil joined TAFE teachers to learn about Refrigerants: Appliances and Heat Pump Systems Using CO2.,at 3 locations, including Queanbeyan In-depth training sessions in Refrigerants: Appliances Using Hydrocarbons were conducted for regional refrigeration technicians in: the ACT, to capture regional refrigeration technicians from south eastern NSW; and (click) in Wagga Wagga, where a new Refrigeration Section will eventually be set up. (click x 4) ‘Train the Trainer’ sessions were conducted at regional locations where the local TAFE College had a Refrigeration Section (Tamworth, Taree, Grafton, and Bathurst). Information Sessions for regional Refrigeration Technicians were held in other strategic regional location, including Dubbo.

3 Including Teachers in the ACT
314 regional Refrigeration Technicians have now received free training in 1 of the 3 courses provided..... The target was 280 Teachers in regional centres have now received free training in 2 courses..... Including Teachers in the ACT All relevant Coca Cola Amatil employees have received free training on the latest dispenser cabinets being released across Australia There were a number of objectives which had to be achieved from Steve Smith’s ‘regional road show’: (click) Teachers from the refrigeration sections in regional TAFE NSW Colleges received ‘Train the Trainer’ sessions to ensure expertise in natural refrigerant training was spread across regional NSW, and refrigeration technicians in the regions will be able to go to their local TAFE College to learn these skills. The ‘Train the Trainer’ Sessions commenced in Newcastle on the 13th August 2009; the picture shown is taken from one of those sessions. (click twice) Staff from Coca Cola Amatil joined TAFE teachers to learn about Refrigerants: Appliances and Heat Pump Systems Using CO2.,at 3 locations, including Queanbeyan In-depth training sessions in Refrigerants: Appliances Using Hydrocarbons were conducted for regional refrigeration technicians in: the ACT, to capture regional refrigeration technicians from south eastern NSW; and (click) in Wagga Wagga, where a new Refrigeration Section will eventually be set up. (click x 4) ‘Train the Trainer’ sessions were conducted at regional locations where the local TAFE College had a Refrigeration Section (Tamworth, Taree, Grafton, and Bathurst). Information Sessions for regional Refrigeration Technicians were held in other strategic regional location, including Dubbo. 6 student workbooks developed and published.... Now available on the web Information sessions were held at all regional centres to increase industry awareness..... Including Dubbo 2 seminars and a training session were conducted during a recent international trade exhibition Stakeholders are now supporting a rollout of this project across Australia

4 Physical Properties Molecular Size R290 R12 R22 R134a Cl C F H
Green – Chlorine – 100picametres Black – Carbon – 70 picametres Yellow/Green – Flourine – 50 picametres White – Hydrogen – 25 picametres R22 R134a The Hydrocarbons may eventually pass through some of the flexible hoses currently manufactured for synthetic refrigerants (predominately auto air conditioning systems) due to their relatively small molecular size

5 Physical Properties Flammability 100% 90% 80% 70% 60% 50% 40% 30% 20%
1m3 or 1000 Litres Flammability 100% 90% 80% 1m 70% 60% 1m 50% 1m 40% 30% 20% 10% 2% = 38g of Propane

6 Physical Properties Auto Ignition

7 Physical Properties Auto Ignition

8 Evap. Td = 4K 0K 340 190 915 660 12°C 5°C Cond. Td = 0K 15K 24°C R134a
kPa 340 190 915 660 12°C 5°C SET 0°C 12°C 24°C 40°C SCT Cond. Td = 0K 15K C/I = 7°C C/O = 5°C 24°C R134a

9 Three Phase with Electric Defrost
B C A B C N N Room Light Evaporator Fans Condenser Fans Low Pressure Control Compressor Motor Thermal Overload Cycling Thermostat High Pressure Control Comp. Contactor Coil CM1 CM2 CM3 CM4 DTC 1 DTC 1 Defrost Time Clock LP FD EF 1 EF 2 EF 3 CM5 DTC1 HP LP Click 1: Main Circuit Breaker Closes - Power is supplied to CM1, 2 and 3 contacts (but they are open at present) Click 2: Power to light switch (but it’s open at present) Click 3: Power to motor in defrost clock (DTC) so it starts running Click 4: Power to the switch operated by the motor in the defrost clock (DTC1). Switch is currently in ‘refrigerating’ mode so power travels up to the evaporator ‘Fan Delay’ low pressure switch but it’s open at present. The suction pressure is too high (Coil is too warm) Click 5: Power passes through the ‘Normally Closed’ (N.C.) auxillary contact (CM5) on compressor motor contactor to Crank Case Heater. This starts to heat up. Click 6: Power to ‘Normally Open’ (N.O.) auxillary contact (CM4) on compressor motor contactor (but its open at present) REVIEW THE CURRENT STATE OF ALL COMPONENTS – EMPHASIS ON WHAT IS RUNNING... DH DLT Defrost Limit Stat Defrost Heater CCH CM5 Crankcase Heater CF 1 FCC CF 2 HP Fan Cycling Control CM Three Phase with Electric Defrost

10 Three Phase with Electric Defrost
B C N N Room Light Evaporator Fans Condenser Fans Low Pressure Control Compressor Motor Thermal Overload Cycling Thermostat High Pressure Control Comp. Contactor Coil CM1 CM2 CM3 CM4 DTC 1 DTC 1 Defrost Time Clock LP FD EF 1 EF 2 EF 3 CM5 CM5 DTC1 HP LP Returning back to the compressor control circuit... Power travels through the ‘closed’ cycling and safety controls to the Compressor Motor contactor coil. It energises and forms a magnetic field. Click 1: This Magnetic field pulls in contacts CM1, 2 and 3. Power travels through the bi-metal overload sensors to the Compressor Motor. Compressor starts pumping. Click 2: The Normally Open (N.O.) auxillary CM4 is pulled in at the same time. Power travels to Condenser Fan No. 1 but is stopped by the ‘Fan Cycling Control’ before it reaches Condenser Fan No.2 Click 3: The Normally Closed (N.C.) auxillary CM5 is also opened at the same time. This stops power to the Crank Case Heater (and it cools back down). REVIEW THE CURRENT STATE OF ALL COMPONENTS – POINT OUT THE EVAPORATOR FANS... ASK WHY?? DH DLT Defrost Limit Stat Defrost Heater CCH CM5 Crankcase Heater CF 1 CF 1 FCC CF 2 HP Fan Cycling Control CM CM Three Phase with Electric Defrost

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