Comments on Greening St. Johns: The Carbon Footprint

Hiya Joanna, I asked our researcher to look into ...

2009-06-17T14:44:22.084+01:00

Hiya Joanna,

I asked our researcher to look into this, he said:

"Solar PV panels appear to vary quite a bit e.g. 10 years – 15 years. There’s big variation in the numbers out there, I’m inclined not to believe anything published by a manufacturer having checked a few of their calculations.

The government, in a microgen study published last year said that there was no data available on embodied energy for microgen technology!

I’ve asked the carbon trust for some data, but they essentially said that the figures for embedded carbon and the time to pay it back varies wildly. There are no standard figures available."

So not sure that actually helps you?! It is a sorry situation for sure, considering the 'chatter' about Carbon Reduction Commitment, Feed In Tariffs and Ofgem's Green Tariff Guidelines going on of late. If no-one actually knows - it makes me wonder why and how are decisions being made regarding legislation to reduce carbon etc?

Perhaps it might be worth asking the diocesan environment officer what methodology they use to calculate the carbon footprints of GSHP, Green Tariffs and Microgen etc..?

Will let you know if we find out more from this end.

Best regards
Paul

Hi thanks for this. I've amended the post so that ...

2009-06-16T23:23:00.965+01:00

Hi thanks for this. I've amended the post so that there is a link to the C of E carbon questionnaire. As you'll see, this was initially meant to be used back in 2005 at the launch of the Shrinking the Footprint initiative and we have to send the details to the diocesan environment officer to get our calculations done.

I'd be really interested to know how the wind turbines' carbon debt pay off compares with that for PV panels or ground source heating (which some local churches are contemplating) - any ideas?

Best wishes

Hi Joanna, I just spotted this post, and I am pre...

2009-06-16T12:46:39.493+01:00

Hi Joanna,

I just spotted this post, and I am pretty sure I can help you out further.

With regards the embedded carbon in our windmills from manufacture - this 'carbon debt' is usually repaid between 6-9 months of operation.

The complexity in calculating your own carbon footprint varies depending on the calculator tool (as you have noticed!).

Could you provide a direct link to the CoE calculator? I can't find it via a google search...

Best regards
Paul