Green and energy generation
http://www.gridwatch.templar.co.uk/
Also read the info section, this is the best paper I have seen on the energy generation situation that I have read so far.
Nothing is left unexplained, no glossing over.
Why are our green policy makers unaware?
Also read the info section, this is the best paper I have seen on the energy generation situation that I have read so far.
Nothing is left unexplained, no glossing over.
Why are our green policy makers unaware?
History
About the Gridwatch Site
My interest in energy matters was sparked initially by a chance remark on the Internet, that in 20 years time all our electricity will come from renewable sources.As an electrical engineer, this seemed at best, optimistic, and at worst a dangerous delusion, but it set in process a long chain of research, which uncovered one surprising fact. Whilst everyone had an opinion on energy, there were very few facts, if any, on which to base their assertions.
So whilst there were dozens of sites claiming this, or that, about energy generation, all seemed to base their claims on the results of models and projections, the fundamental assumptions of which were rarely stated, and never challenged.
Two potentially flawed assumptions were rapidly arrived at with respect to renewable energy.
These crystallise down to an understanding of the energy density of renewable energy - essentially how big the energy generating plant has to be to contribute anything worthwhile, and intermittency - that is the tendency of the wind, tides, waves and sunlight to not be there in a steady state all the time. The best place for further facts on energy density is David Mackay's webs site (and book) Renewable Energy - without the hot air, and intermittency and for and in-depth dicussion on the impact of intermittency this paper.
Finally after having expressed a desire for anyone to point me at a site for real world data on power generation, I was referred to the BM Reports website, where real-time - or near real-time - data is available on exactly what The United Kingdom's electricity grid is doing. That was a huge leap forward in actually gathering the data, as it has pages of latest statistics, but the ability to retrieve archived data and perform instant calculations as well its - frankly awful - graphical displays, was a real drawback.So gridwatch was born, first of all to scrape the data off the BMreports site every 5 minutes and inject it into an SQL database where it would be easy to perform specific searches and do statistical analysis. Then, in a rather retro and humourous way, to display the data in terms of analogue instruments and moving graphs. This is pure personal amusement, I like dials and graphs.
The site then rapidly gained popularity (and bandwidth!) to the point where it had to be transferred to a centrally located server, which is where it now resides.
This site is entirely privately and personally funded. It takes no donations or grants from any government, quasi non-governmental or commercial organisations whatsoever. It exists simply to provide and present the data as is, not to attemnpt to make a point with it - that is done elsewhere.
This may be modified (if time permits)to allow user selection of time periods and data objects to reduce the server workload on those who wish to examine less than the full set.
The data is not massaged, corrected or adjusted in any way: it reflects, in addition to the actual data, a few data points that are missing, or invalid, because of glitches in the BM reports soap server, and in losses of communication and occasionally software bugs.
The user display is a simple PHP script. The dials and graphs are built up by overlays of 3D modelled bezels and needles, and the graphs generated by the background processes. Source code is freely available of any or all of the site (with site specific information removed) on request.
Please contact this email address
<< BACK TO GRIDWATCH
So whilst there were dozens of sites claiming this, or that, about energy generation, all seemed to base their claims on the results of models and projections, the fundamental assumptions of which were rarely stated, and never challenged.
Two potentially flawed assumptions were rapidly arrived at with respect to renewable energy.
- That its wide scale deployment would have no ongoing costs in social, economic or emissions beyond the plant installation and mainenance itself - that is, the social, environmental and extraneous costs of managing its output and deployment could be ignored.
- That every unit of electricity generated by it would lead directly to an equivalent reduction in fossil fuel usage.
These crystallise down to an understanding of the energy density of renewable energy - essentially how big the energy generating plant has to be to contribute anything worthwhile, and intermittency - that is the tendency of the wind, tides, waves and sunlight to not be there in a steady state all the time. The best place for further facts on energy density is David Mackay's webs site (and book) Renewable Energy - without the hot air, and intermittency and for and in-depth dicussion on the impact of intermittency this paper.
Finally after having expressed a desire for anyone to point me at a site for real world data on power generation, I was referred to the BM Reports website, where real-time - or near real-time - data is available on exactly what The United Kingdom's electricity grid is doing. That was a huge leap forward in actually gathering the data, as it has pages of latest statistics, but the ability to retrieve archived data and perform instant calculations as well its - frankly awful - graphical displays, was a real drawback.So gridwatch was born, first of all to scrape the data off the BMreports site every 5 minutes and inject it into an SQL database where it would be easy to perform specific searches and do statistical analysis. Then, in a rather retro and humourous way, to display the data in terms of analogue instruments and moving graphs. This is pure personal amusement, I like dials and graphs.
The site then rapidly gained popularity (and bandwidth!) to the point where it had to be transferred to a centrally located server, which is where it now resides.
This site is entirely privately and personally funded. It takes no donations or grants from any government, quasi non-governmental or commercial organisations whatsoever. It exists simply to provide and present the data as is, not to attemnpt to make a point with it - that is done elsewhere.
How the site works
The software is based around a typical LAMP (Linux/Apache/Mysql/PHP) installation on a virtual private server. A C program runs under cron and collects the data from BMreport's soap server. This data is then injected into the SQL database. The latest sample is also placed in a temporary file where it can be read by the web scripts to form the data for the dial displays. A second C program runs under cron after the first, to update the daily, weekly, monthly and annual graphical displays also.Once a day another C program is involed to convert the entire database into CSV format for download/import by those interested in performing statistical anlaysis.This may be modified (if time permits)to allow user selection of time periods and data objects to reduce the server workload on those who wish to examine less than the full set.
The data is not massaged, corrected or adjusted in any way: it reflects, in addition to the actual data, a few data points that are missing, or invalid, because of glitches in the BM reports soap server, and in losses of communication and occasionally software bugs.
The user display is a simple PHP script. The dials and graphs are built up by overlays of 3D modelled bezels and needles, and the graphs generated by the background processes. Source code is freely available of any or all of the site (with site specific information removed) on request.
Please contact this email address
<< BACK TO GRIDWATCH
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