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mardi 20 avril 2010

Climate control

Fox's Tales
by Graeme Fox
Graeme Fox is an RAC contractor based in Dundee. He is a director at AREA (Air Conditioning & Refrigeration European Contractors' Association) and a member of the Institute of Refrigeration.

23/03/2010 14:14:00
It's been a strange start to 2010. Heavy snowfalls grinding much of the south of England to a halt, while on the east coast of Scotland we've seen very little snow since the turn of the year. It has been a very cold winter.

From memory and from anecdotal evidence, it is quite normal to have a good, warm summer following a cold, hard winter.

It will be interesting to see, after so much bad news for the dedicated doomsday-warning brigade recently, if they immediately jump on this and proclaim it as evidence of chaotic
climate change caused by man's recklessness.

Personally, I'm far from convinced of the extent of man's impact on
global climate patterns.

I've been interested in the subject of planets and the universe for a long time and, having read so much on the subject over the last 30 or so years, the main thing that strikes you is the vastness of the universe around us - and consequently the relative size of Earth itself.

But even when you look at the Earth in isolation this same contrast in relative size is apparent. Viewed from space the Earth is an extremely beautiful planet but you don't see the myriad life forms that dwell on it because we are all so small.

I know that even the smallest creature can have a catastrophic effect on large life forms - after all, even viruses are life forms of a kind that can and have wiped out entire species in the past and continue to threaten us from time to time now.

But man does have an overblown opinion of his importance and influence, both existing and potential, on greater things. Many animals living in the wild have very similar family and network groups to western human society - and all without the infrastructure we seem to believe is necessary. In the distant past there is evidence aplenty of man's ability to live in harmonious communities long before there was any form of bureaucracy.

There is also a wealth of evidence proving that much of the planet has had a number of significant warmer and cooler periods than we are currently witnessing. Warm enough for certain crops to grow in the British Isles that wouldn't survive even now - at a time when we are told that we face imminent catastrophe - and long before the chemical emissions that man is guilty of discharging to atmosphere became an issue.

Environmentalists talk of global sea levels rising and cite Bangladesh as an example of the threat. But globally sea levels aren't rising - as surely they must if the cause were glacial melting! Isolated cases of minimal sea level rise are contrasted with the majority "no change", and the flooding in Bangladesh is apparently coming from rivers bursting their banks, not the sea! Other factors and influences are affecting these patterns, not just man's
emissions.



The fact is that man has very little ability to control the weather, let alone climate patterns, despite his over inflated opinion of his worth.

So, before those with a vested interest in promoting their green jobs and positions start bleating this summer about how each sunny day we may be lucky enough to enjoy this year is evidence of catastrophic climate change, remember to give them a reality check on the insignificance of man in the great scheme of things.

mercredi 7 avril 2010

Hydrocarbon Refrigerants - the continuing saga

Fox's Tales
by Graeme Fox
Graeme Fox is an RAC contractor based in Dundee. He is a director at AREA (Air Conditioning & Refrigeration European Contractors' Association) and a member of the Institute of Refrigeration.

06/10/2009 09:25:01
What an interesting month its been. A number of people posted comments after my last blog - many of which followed the usual line these days: if you can't argue the case, just smear the name!

Some interesting technical points were made, but there are two things I'd like to say on the issue of the exploding
fridges before I move on.

Firstly, despite the comments left by those who claim the small charge cannot possibly result in this damage - the fact remains that a very small leak has resulted in ignition in the past. This fact has been accepted by the manufacturers, hence the imminent tightening of the EN378 regulation. Interesting that those who argue against the facts refuse to leave their names or organisation names on the site. If you are so sure of the facts why hide behind a pseudonym? It only makes me suspicious that those who are arguing don't know the facts, only the spin.

Secondly, for anyone who attended the recent
Cooling Industry awards it was obvious to all present how the industry feels about hydrocarbon refrigerants becoming the norm. When reference was made by some to the exploding fridge story highlighted here, there was a considerable swell of approval for raising the issue and getting the real arguments discussed for a change.

While wholesale changeover to hydrocarbons would conveniently tick a box and meet one target for our political classes, they would be left with a severe energy shortage crisis due to the lower efficiencies with split system
air conditioners running on hydrocarbons compared with HFCs.

All of this is, of course, entirely avoidable if industry is given the power by government to properly and effectively police the F Gas Regulation. The argument is simple.

HFCs account for around 1.5% of
greenhouse gas emissions worldwide.
Of that, car ac account for around 70%. Therefore, static ACR accounts for around 0.5%.

A properly implemented F Gas Regulation would result in a drop in emissions to around 10% that of present levels (based on the results of similar legislation abroad). Therefore, once the car ac industry has dealt with their phase out which is already agreed, the static acr industry will account for approximately 0.05% of the world's greenhouse gas emissions.

The message is clear: we're not the ones who are damaging the planet.
Concentrate on energy efficiency and we'll see real results in the
carbon emissions reduction programme.

Finally, a message to John Wallis who seemed to enjoy referring to my blog as a fairy tale. There is no definitive answer to your question. Different manufacturers and different models of domestic fridge would hold varying amounts of
hydrocarbon refrigerants. However, it is safe to say between 25 and 150 grammes. I know some readers find it incredulous that such a small amount of gas can cause this damage, but clearly it is possible.

Some industry figures have come out pointing out the small number of incidents compared to the vast numbers of fridges sold. This is true. But one incident is too many isn't it? Particularly when there is the real possibility of fatality.

And all we've seen in answer to the recent spate of bad publicity has been technical speak, which helps to confuse the political classes, insinuating this sort of thing cannot happen.

Clearly it can and has!