There may be trouble ahead.....

[monkey spanners]

Someone tell me i've got this wrong please:(

My van does about 240g km Co2
20k miles = 32k km x 240g Km = 7680 kg Co2
Ok so far?

R404A global warming potential (Co2 = 1) 3859:eek:

So the leak i fixed on a cheese cold room last week (not one of my installs) needing 2.5kg R404A was equal to 9647 Kg of Co2:eek: :eek: :eek:

One small leak is worse than all my driving about.

Hopefully i've got a decimal point in the wrong place.

Cheers Jon (off to plant some trees)

[Brian_UK]

Someone tell me i've got this wrong please:(

My van does about 240g km Co2
20k miles = 32k km x 240g Km = 7680 kg Co2
Ok so far?.

Hopefully i've got a decimal point in the wrong place.

No, 32k x 0.24kg = 7.68 kg

There, do you feel better now ?;)

[monkey spanners]

The point that i was trying to get over is that if i've understood the global warming potential rating as stated in United Refrigerants catalogue is that one small leak is worse for global warming than a years motoring. 10g of R404A in your gauge line is equal to 160km of driving:eek:

Thankyou Brian for your reply, but i still think i got it right.

32000 killometers x 0.24 killogramms Co2 per killometer = 7,680 killograms of Co2 out of my van

R22 Gwp (Co2=1) 1780
R134a Gwp (Co2=1) 1320
R404A Gwp (Co2=1) 3859
R407C Gwp (Co2=1) 1674
R410A Gwp (Co2=1) 1997

So one killo of R134a is the equivalent to 1,320 killo's of Co2 when released into the atmosphere:confused: :eek:
No wonder (was it) Denmark wanted to ban HFC's.
There'll be a sh*t storm if the greens work this one out, so far i think they've only worried about the electricity our systems use.

Any opinions welcome, cheers Jon

[Argus]

.

You've got it in one - including the calculation and the decimal point.

R 404A has a moderately high GWP in comparison to other refrigerants. That's why the F Gas regulations centred on emission control, are so important.

The van's dishing out 1kg of CO2 about every 4km or about 272g of carbon. In 32000 km driving you will produce about 2095 kg of carbon.

The CO2 emissions from combustion in your engine are instantaneous. Where the GWP for a fluorinated refrigerant is calculated it is done so on a time-weighted equivalent horizon that allows for the deterioration of the chemicals in the upper atmosphere.

This is under revision, but the commonest calculations of GWP used in EN 378 and most manufacturer's data are based on a time horizon of 100 years. There are different scenarios for differing time scales.

.

[NoNickName]

32.000 Km x 0.240 Kg/Km = 7680 Kg.

[Argus]

There'll be a sh*t storm if the greens work this one out, so far i think they've only worried about the electricity our systems use.

Any opinions welcome, cheers Jon

The 'Greens' have been banging on about this for years because the same applies to ODS substances (CFCs and HCFCs) that have similar high GWP indexes.
R12, for example has a GWP listed as 8500.

Until defeated in a European Parliamentary vote last October, the F Gas regulation contained several ammendments to ban the use of HFCs begining at the end of the decade.

In the subsequent vote, the Green MEPs abstained en masse.

.

[Brian_UK]

I know, I know, my math was embarrasing.

Moving one decimal point and ignored the other one completely.

You can't see me right now, I'm standing in the corner hanging my head in shame.

[Andy]

You can't see me right now, I'm standing in the corner hanging my head in shame.

As we say in Ireland, hows that going for you:D

cheer up it's only Monday:)

Kind Regards Andy:)