Or why it's profitable to manufacture Duracell batteries at an EROI of.... very little!vtsnowedin wrote:Not to butt in. Againkenneal - lagger wrote:??? Sorry, I don't understand what you are saying here.johnhemming2 wrote:Parker Morris standards were good. However, the main thing about EROEI is that there needs to be some. Otherwise it depends where the energy invested comes from. If it comes from the energy returned it is just a less efficient system.but perhaps he means that you might take energy from say hydro power or coal and use it to produce (at an EROEI loss) a liquid fuel ( ie. oil) and because the liquid fuel will fly your air plane and both hydro or coal will not you don't mind that it took you 1000 BTUs of coal to net 300 BTUs of jet fuel.
It is highly doubtful whether low EROEI energy sources...
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biffvernon
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Interesting set of data. I expect we will find that, 'housing crisis' not withstanding, there are currently more square metres of housing per person than at any time since we gave up on cave-dwelling. And if we factor in quality issues such as dampness, indoor toilets and even insulation, the current position is comparatively rosy, despite there still being plenty of scope for improvement.
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kenneal - lagger
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Comprehension at last!!vtsnowedin wrote:Not to butt in. Againkenneal - lagger wrote:??? Sorry, I don't understand what you are saying here.johnhemming2 wrote:Parker Morris standards were good. However, the main thing about EROEI is that there needs to be some. Otherwise it depends where the energy invested comes from. If it comes from the energy returned it is just a less efficient system.
As I have said before if we are to maintain our society there needs to be a lot more EROEI than some! There needs to be a minimum of 5, overall, to sustain society at anywhere near our current expectation. The more luxuries and the higher the cultural standard the higher the EROEI we require. It is the energy surplus that maintains anything over basic living.
Yes, we can manufacture fuels for convenience of use at a loss of EROEI but overall the EROEI must be over 5.
Action is the antidote to despair - Joan Baez
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vtsnowedin
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Are you saying that England is so damp that softwood studs rot even if the roof is kept in good repair?PS_RalphW wrote:...
... Modern houses are built to a uniformly low standard of construction and insulation, relative to best practice, not so different to the Victorian back to back slums. In 50 years, the structural softwood timbers will have rotted, the PVC will have cracked and they will be plagued with unrepairable leaks and mould.