Energy, a human perspective
A human with a diet of approximately 2,500 calories per day can deliver around 100Watts output all day, roughly the equivalent of keeping one 100W light bulb glowing all day.
In the UK, the average energy we use in the house, workplace, being a consumer, travel etc. is approximately 125KWh/day. This would be enough to keep 52 100W light bulbs glowing all day.
A barrel of oil contains about 1.7MWh of energy which would keep some 708 100Watt light bulbs glowing all day.
The energy density of a barrel of oil is absolutely amazing.
We are using up one of the planet’s natural capital assets and not paying the true cost. This has locked the energy systems infrastructure and technology into a blind alley and an economic model based on readily available cheap energy that does not have to be used too efficiently.
This week I attended a debate on Fracking at The Building Centre. Estimates vary considerably but it seems that there is about three North Sea Oils-worth of shale gas under the UK. The Lancashire shale gas field could deliver in the order of one trillion cubic feet of gas per year for 40 years, which is about a third of the current UK annual demand.
The tax revenue, energy security and economic boost of low price energy would all suggest that it will be business as usual for hydrocarbons for a few more decades.
So what of the impact? Well it seems that the consensus is that manmade climate change is real and that we have probably gone beyond the tipping point and burning shale gas is less bad than burning coal and everybody else will be doing it so why should we put ourselves at a disadvantage. But, as people have said before, being less bad is not good.