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Worcestershire Micro-enterprise Project is about to start …

A new and exciting Micro-enterprise Project is about to get started in a partnership between Worcestershire County Council and Community Catalysts. Running until February 2014 the project will support the growth of micro-enterprises within the health and social care sector across two pilot areas of the County. A co-ordinator has been appointed and will soon start work publicising the project, making contact with existing and emerging micro enterprises and providing advice and support about setting up a micro enterprise.

More details to follow soon on the two pilot areas plus contact details for the new Micro market co-ordinator.

For more information about Community Catalysts and micro enterprise projects around the country go to www.communitycatalysts.co.uk/case-studies 1 References ^ www.communitycatalysts.co.uk/case-studies (www.communitycatalysts.co.uk)

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Worcestershire Micro-enterprise Project is about to start …

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Energy Storage using freight trains…feasible?

Alternative …

Feasible and exciting? Some think otherwise. User #546387 23 posts Ned Ludd I’ve got a solution but they tell me I’m crazy!

Find a hill, Great dividing range is ideal Get a few nice big electric locomotives, this one looks nice; China Railways HXD1B China Railways HXD1B0001-HXD1B0500 CSR Zhuzhou Electric Locomotive, Siemens 2009 Electric Co’Co’ 150 t 12,874 horsepower (9,600 kW) Most powerful single frame locomotive in series production That’s a 10 Megawatt loco…perfect. Build a track up to the top of the hill with a nice big loop returning to a downhill track. Another loop at the bottom to link the up/down tracks.

During times of excess supply, send train loads of rocks/scrap iron up and park them in the loop. When power is needed send trains back down and use regenerative braking to generate power. When there are not many trains left at the top a warning can be issued to crank up the fossil fuelled plants in plenty of time.

No need for a driver, fully automatic. Tracks can be built anywhere that there is a suitable hill. Steel wheels on tracks are very energy efficient.

Way out idea? No more so than flywheels, compressed air or whacky new batteries! reference: whrl.pl/Rdtgyf posted 2013-Feb-1, 11am AEST Ned Ludd writes…

Find a hill, Great dividing range is ideal I think your train will have problems making it up the hill, especially with a heavy load. http://en.wikipedia.org/wiki/List_of_steepest_gradients_on_adhesion_railways Metros and pure commuter railways often also allow higher gradients, up to 4%, for the same reason. High speed railways commonly allow 2.5% to 4% because the trains must be strong and have many wheels with the power to reach very high speeds.

For freight trains, gradients should be as gentle as possible, preferably below 1.5%. Let’s be ambitious and say that you can use a 2% grade. You then are allowed to take your rocks UP 1m for every 500m you travel horizontally.

Cunninghams Gap (in QLD) has an elevation of 787m. Ipswich (where a lot of the power generation assests are around) has an elevation of 50m. The difference is then 737m.

At a grade of 2% your horizontal track then needs to be 37km long. That’s not that long (it’s about double that from Ipswich to Cunninghams Gap by road), but it needs to be a steady grade, so what you effectively need to do is build a MASSIVE 37km earthen ramp from Ipswich to the Range. Of course you would try to follow a route that included natural hills and other features that could be included in your slope so their is less work for you to do (but then you introduce curves, which have their own problems).

I have no idea how wide a base you need to have on your ramp at the end that is 700m in height. Perhaps it wouldn’t be earthen all the way, but I doubt you could build an elevated track on any height that would carry the weight without some massive engineering either. The amount of energy you can store is also interesting.

Moving a 150 tonne car (loaded with rock, steel, whatever) to a height of 737 gives a potential energy of 300kWh. Not sure how many cars you’d need to satisfy peak demands, but I believe it would be in the order of GWh’s ? To store 1GWh would then require 3333 cars (that’s a fair number, I think you’re going to need a big loop at the top).

The other factor is how quickly you can generate the power. If it’s a 10MW loco then that’s what it will both consume as an instantaneous value when it’s going up the hill and also what it will generate coming back down. So if you want to generate 350MW of capacity (the equivalent of one of the coal fired generation units at Tarong) then you would need 35 trains coming down the track at the same time.

To give 1GW of capacity you need 100 trains in full flight. Water is good because you can pump it. It doesn’t care if the grade is 90% (almost straight up) as long as your pump is powerful enough.

But to use pumped hydro you need a location that has space for a massive reservoir at the top, another at the bottom, a large volume of water that you can replenish (ie. a dam on a river) and also significant height differential between the two of them. This is what we’re very short on in Australia (and the world in general).

SAY IT ISN’T SO Posted Sunday 14 Apr 2013 @ 7:51:15 am from IP #

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