Talk:Lee Valley White Water Centre

East Anglia Low‑importance

	This article is within the scope of WikiProject East Anglia, a collaborative effort to improve the coverage of East Anglia on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.East AngliaWikipedia:WikiProject East AngliaTemplate:WikiProject East AngliaEast Anglia articles
Low	This article has been rated as Low-importance on the project's importance scale.

Olympics Low‑importance

	Olympic Games portal This article is within the scope of WikiProject Olympics, a collaborative effort to improve the coverage of Olympics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.OlympicsWikipedia:WikiProject OlympicsTemplate:WikiProject OlympicsOlympics articles
Low	This article has been rated as Low-importance on the project's importance scale.

Water sports Low‑importance

	Lee Valley White Water Centre is within the scope of the WikiProject Water sports, a collaborative effort to improve Wikipedia's coverage of Water sports. If you would like to participate, you can visit the project page, where you can join the project and see a list of open tasks.Water sportsWikipedia:WikiProject Water sportsTemplate:WikiProject Water sportsWater sports articles
Low	This article has been rated as Low-importance on the project's importance scale.

Architecture Low‑importance

	Architecture portal This article is within the scope of WikiProject Architecture, a collaborative effort to improve the coverage of Architecture on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ArchitectureWikipedia:WikiProject ArchitectureTemplate:WikiProject ArchitectureArchitecture articles
Low	This article has been rated as Low-importance on the project's importance scale.

Pictures needed edit

Latest comment: 13 years ago1 comment1 person in discussion

We need for someone to take some pictures for use in this article. There are many good pictures on the Internet, but none with the necessary copyright release. If you have some, place a note on my user talk page (click on the word "talk" in parentheses), and I can upload them for you. Thanks, HowardMorland (talk) 15:57, 24 March 2011 (UTC)Reply

Energy consumption of Olympic slalom course edit

Latest comment: 11 years ago1 comment1 person in discussion

What's all this about massive energy costs? (in the sixth paragraph)

http://www.standard.co.uk/news/rapids-of-rockies-come-to-herts-for-2012-olympic-canoeists-6472660.html — Preceding unsigned comment added by 79.66.216.5 (talk) 15:41, 2 August 2012 (UTC)Reply

Massive Energy Costs edit

Latest comment: 11 years ago3 comments3 people in discussion

Part of the article states "the massive energy costs of pumping the water". As a casual reader of the article I find this vague sentence frustrating. Does it cost £100 a day or a million pounds an hour? I don't need exact figures, but the article needs something to quantify what 'massive' is, as it's a very subjective word. A better sentence would be "the massive energy costs of pumping the water, estimated at £X per hour". — Preceding unsigned comment added by 95.144.40.195 (talk) 19:26, 2 August 2012 (UTC)Reply

I deleted the word "massive" as it was meaningless. As it is, that sentence was a direct copy/paste from this news article. A Google news archives search for the years 2000 to the end of 2011 turned up nothing for "Lee Valley White" or "Broxbourne White Water" and the word "energy." I tried a wider search (both News and web) but only learned that the water flow is 15 cubic metres or 13,000 litres per second.

The Artificial whitewater article claims "typically 1-2 megawatts of electrical power is needed to pump 15 cubic metres per second of water down a course with a 5 meter drop in height." but there is no citation. I {{unreferenced}} tagged that article. This web page for the Ocoee Whitewater Center says their water costs 30 Megawatts of electricity but that's a special case in that they divert water from an electricity production facility to "power" the white water facility.

The List of artificial whitewater courses also makes unsourced claims such as "A single channel on the Olympic model — a 6-meter drop at 17 m³/s — represents one megawatt of energy, either supplied by pumps or sacrificed in the case of diversion around a hydroelectric generator." If that's true then the Lee Valley White Water Centre should be under one megawatt of energy as it has a 5.5 meter drop at 15 m³/s.

It does appear that the Centre uses around one megawatt. This page seems reliable for electrical costs which says 7.95 pence per kWh for the UK. This is £79.5 per megawatt/hour. I doubt they will run the pumps 24 hours per day but if they did it would be £1,908 per day and £58,075 per month (£1,908 per day times 365.25 days/year divided by 12 months/year). It's not clear why they want £50,000 per day. --Marc Kupper|talk 03:35, 6 August 2012 (UTC)Reply

I cannot find a reference which converts m³/s to kilowatts per meter of elevation change, but the calculation is straightforward. It comes out to 9.8 kilowatts by the following reasoning. One cubic meter of water has a mass of 1000 kg, by definition, and a weight of 9800 Newtons at the earth's surface. One watt is one Newton-meter per second, by definition. Therefore, one cubic meter of water per second is 9.8 kilowatts per meter. (This calculation has been confirmed by answers.yahoo.com.) Therefore 13 m³/s times a 5.5 meter drop comes to 700 kilowatts (13 x 5.5 x 9.8), assuming 100% efficiency of the electric pumps. By the way, it does not matter how long it takes the pumps to raise the water, as long as 13 m³ arrive at the start pool every second, to replace the 13 m³ that left the start pool and entered the channel during that second.

The London architects deliberately designed the whitewater venue to use less electricity than the 2008 Beijing venue by having a lower drop (5.5 m vs. 6.3 m), in order to reduce expenses in its operation as a water park after the Olympics. HowardMorland (talk) 05:11, 5 January 2013 (UTC)Reply

External links modified edit

Latest comment: 6 years ago1 comment1 person in discussion

Hello fellow Wikipedians,

I have just modified 11 external links on Lee Valley White Water Centre. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 20:23, 19 December 2017 (UTC)Reply

Add topic