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kepler energy home highlights about us technology published papers videos tidal fences the team media press release blog contact us the university of oxford department of engineering science has developed an innovative, second generation tidal turbine (thawt). testing has successfully demonstrated potential effectiveness significantly higher than existing axial flow designs. the kepler transverse horizontal axis water turbine (thawt) is designed to be operated either in arrays or in stand-alone form. it is highly effective and efficient in terms of extracting the maximum power from given stretches of tidal or river current. theoretical analysis and modelling, confirmed by testing, has shown outputs several times higher than those achievable by propeller type turbines placed in the same site. this advantage arises from (1) the greater rectangular swept area of a thawt rotor compared with the depth limited circular swept areas of multiple propeller type rotors and (2) the fact that greater powers can be extracted from tidal flows by optimising the blockage ratio (swept area of turbine divided by flow area). theoretical analysis has shown that, because of the free water surface in tidal flows, tidal turbines, unlike wind turbines, are not subject to the betz power limit . t he thawt rotor design is better suited to this optimisation than conventional propeller type turbines. the structure itself is novel, the blades themselves being configured so that the turbine rotor (called a triangulated stressed truss) needs no enveloping supporting structure (the truss structure feature is patented in key global markets). this leads to lower parasitic drag, and hence low power losses and simple, cheap construction with longer rotors across the flow. this is in contrast to all other transverse horizontal axis turbines on the market, which are limited in their power output by their lack of structural rigidity and consequent limited maximum size the basic generating unit comprises two turbines with a central direct drive generator, with only four supporting bearings and three foundation supports required. as a consequence of this design, the weight of the unit will be significantly lower than that achievable by propeller type units. the design philosophy throughout is focused on extreme reliability combined with ease of installation and maintenance with minimal or no ecological impact. the illustration at the head of the page shows one possible configuration, a thawt turbine assembly in fence format. the transverse horizontal axis configuration works equally well with flow from either direction and hence requires no adjustments as the tide changes direction. the turbine is scalable to suit different marine sites. a typical turbine rotor would be 10 m diameter and 60 m long sited in a tidal flow with a mean depth of 20 m. documented flume tests on a scale model have shown that the basic 10m diameter, 120 m long unit (two turbines with one generator) should generate more than 4.4 mw at a water velocity of 2m/sec, and more than 5.2 mw at a water velocity of 2.5m/sec. in addition, the unit will operate with reasonable efficiency at low water velocities. the simplicity of the design – only one rotating unit, with no yaw mechanism, no complex pitch changing mechanisms and with electrical equipment in a dry column – means that the kepler turbine arrays will have very significantly lower life-cycle costs than those of first generation machines. the characteristics (in terms of swept area and ability to exploit blockage) of the turbine in tidal fence format (for example in 20m of water, with peak spring flows of 2m/sec) are such that it should have around two to three times the power output of an array of conventional axial turbines, with levelised costs proportionally even lower. as an example, a 14 km tidal fence would have a peak output in excess of 600 mw and is likely to have lower levelised costs than offshore wind. web hosting by just host

URL analysis for keplerenergy.co.uk

http://keplerenergy.co.uk/index.html/contact-us.html
http://keplerenergy.co.uk/index.html/tidal-fences.html
http://keplerenergy.co.uk/index.html/highlights.html
http://keplerenergy.co.uk/index.html/about-us.html
http://keplerenergy.co.uk/index.html/blog.html
http://keplerenergy.co.uk/index.html/technology.html
http://keplerenergy.co.uk/index.html/press-release.html
http://keplerenergy.co.uk/index.html/media.html
http://keplerenergy.co.uk/index.html/the-team.html
http://keplerenergy.co.uk/index.html/published-papers.html
http://keplerenergy.co.uk/index.html/videos.html

Whois Information

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Domain name:
keplerenergy.co.uk

Data validation:
Nominet was able to match the registrant's name and address against a 3rd party data source on 26-Aug-2015

Registrar:
eNom LLC [Tag = ENOM]
URL: http://www.enom.com

Relevant dates:
Registered on: 16-Sep-2010
Expiry date: 16-Sep-2019
Last updated: 16-Sep-2017

Registration status:
Registered until expiry date.

Name servers:
ns1.justhost.com
ns2.justhost.com

WHOIS lookup made at 13:08:52 25-Jun-2018

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  REFERRER http://www.nominet.org.uk

  REGISTRAR Nominet UK

SERVERS

  SERVER co.uk.whois-servers.net

  ARGS keplerenergy.co.uk

  PORT 43

  TYPE domain

DOMAIN

SPONSOR
eNom LLC [Tag = ENOM]
URL: http://www.enom.com
Relevant dates:

  CREATED 16-Sep-2010

  CHANGED 16-Sep-2017

STATUS
Registered until expiry date.

NSERVER

  NS1.JUSTHOST.COM 162.159.24.49

  NS2.JUSTHOST.COM 162.159.25.241

  NAME keplerenergy.co.uk

DISCLAIMER
This WHOIS information is provided for free by Nominet UK the central registry
for .uk domain names. This information and the .uk WHOIS are:
Copyright Nominet UK 1996 - 2018.
You may not access the .uk WHOIS or use any data from it except as permitted
by the terms of use available in full at https://www.nominet.uk/whoisterms,
which includes restrictions on: (A) use of the data for advertising, or its
repackaging, recompilation, redistribution or reuse (B) obscuring, removing
or hiding any or all of this notice and (C) exceeding query rate or volume
limits. The data is provided on an 'as-is' basis and may lag behind the
register. Access may be withdrawn or restricted at any time.

  REGISTERED no

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