{"id":29,"date":"2016-01-14T13:44:35","date_gmt":"2016-01-14T12:44:35","guid":{"rendered":"http:\/\/windmobile.site\/en\/?page_id=29"},"modified":"2016-02-03T11:56:12","modified_gmt":"2016-02-03T10:56:12","slug":"windpower-ltett","status":"publish","type":"page","link":"http:\/\/windmobile.lu\/en\/windpower-ltett\/","title":{"rendered":"Windpower @ LTETT"},"content":{"rendered":"

Windpower@LTEtt<\/strong><\/p>\n

In 2007, the idea arose to add a wind turbine to the photovoltaic system on the roof of the Lyc\u00e9e Technique d\u2019Ettelbruck.<\/p>\n

During the 2007\/2008 academic year, two Year 6 pupils designed the system as part of their \u201cEnergy and Environment\u201d course. The installation site was determined, a suitable wind turbine was chosen and a mast appropriate for the roof construction was specified.
\n $\"IMG_2396\"$ <\/a><\/p>\n

Technical data:<\/strong><\/p>\n

Wind turbine<\/strong><\/p>\n

The wine turbine is a device made by Braun Windturbinen and features the following technical data:<\/p>\n

<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n Antaris 1.7kW<\/strong><\/td>\n<\/tr>\n
Rotor<\/td>\n 3 GFK \u2013 rotor blades; \u00d8 3.50m; low-noise due to winglets; stall controlled<\/td>\n<\/tr>\n
Generator<\/td>\n gearless; brushless; 3-phase; permanent magnet rotor (NdFeB); 10-pole<\/td>\n<\/tr>\n
Power transmission<\/td>\n slip rings \/ cable<\/td>\n<\/tr>\n
Voltage<\/td>\n up to 500 VDC<\/td>\n<\/tr>\n
Rated output<\/td>\n 1700 W<\/td>\n<\/tr>\n
Start-up speed<\/td>\n 2.4m\/s<\/td>\n<\/tr>\n
Nominal speed<\/td>\n 12m\/s<\/td>\n<\/tr>\n
Survival speed<\/td>\n 55m\/s<\/td>\n<\/tr>\n
Storm protection<\/td>\n Voltage monitoring; helicopter position<\/td>\n<\/tr>\n
Weight<\/td>\n 89kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u00a0<\/strong><\/p>\n
Mast <\/strong><\/p>\n
A tilt mast was chosen to allow any potential changes to be made to the installation. The mast was designed and constructed by metal manufacturer Thill in Asselborn.<\/p>\n
Mast technical data <\/strong><\/p>\n
\n
Mast made of tubular steel, \u00d8139.7 x 5.0mm \u2013 Quality S235<\/li>\n
Mast head with flange \u00d8220 x 10.00 \u2013 identical to foot flange WKA<\/li>\n
Mast foot with hinge, for folding with the help of a hoist or similar<\/li>\n
2 heavy-duty fastening brackets mounted to the building, with clamping screw and safety bolts featuring a padlock to prevent unauthorised unscrewing of the brackets<\/li>\n
maximum wind resistance of the installation according to manufacturer specifications………………………………………………………………….. 40 kN<\/li>\n
weight of installation, manufacturer specification………………….. 0.75 kN<\/li>\n
maximum wind pressure to mast tube, derivation see appendix 08 ……………………………………………………………………… 858 kN\/m2<\/li>\n<\/ul>\n
<\/p>\n
Support reactions<\/strong><\/p>\n
Perpendicular to the hinge<\/p>\n
Fv= 0.75 + 6.0 x 0.166 = 1.75 kN<\/p>\n
Horizontal to the brackets<\/p>\n
FH=(1.40\u00d73.93+0.858\u00d70.14\u00d73.932 \/2)\/1.25= 5.14kN<\/p>\n
Bending moment in tube at upper mount <\/strong><\/p>\n
Moment caused by wind<\/p>\n
M=1.40\u00d73.93 +0.858\u00d70.14\u00d73.932 \/2 = 6.43kNm<\/p>\n
Deflection<\/p>\n
f1=1\/3x140x393.03 \/2.10\/106 \/480.5= 2.81cm f2=1\/8\u00d785.8\u00d70.14\u00d73.93\u00d7393.03\/2.1\/106 \/480.5= 0.36cm f= 3.17 cm<\/p>\n
Secondary moment caused by displacement M\u2019=(0.75+1\u20442\u00d76.0×0.166)x3.17\u00d710-2 =0.04kNm<\/p>\n
Bending stress in tube <\/strong><\/p>\n
\u03c3= 1.50 x 6.50 x 103 \/ 68.80 = 142 N\/mm2 (1.50 = dynamic coefficient)<\/p>\n
Safety against the stress limit k= 240 \/ 142 = 1.69
\n $\"IMG_2381\"$ <\/a><\/p>\n
Electrical installation <\/strong><\/p>\n
The electricity generated is fed into the public grid via a grid inverter (Windy Boy 1100).
\n $\"IMG_0951\"$ <\/a><\/p>\n
(caption) <\/em><\/p>\n
Meter cabinet, frequency converter and inverter<\/p>\n
The electrical energy generated is reimbursed by the energy supply company.
\n $\"Schaltplan\"$ <\/a><\/p>\n
(diagram)<\/em><\/p>\n
Generator mit 3 Phasen = Generator with 3 phases<\/p>\n
Schaltschrank = control cabinet<\/p>\n
Energiez\u00e4hler = energy meter<\/p>\n
Einspeisung ins Netz = feeding into the grid<\/p>\n
\u00d6ffentliches Stromversorgung = public electricity supply<\/p>\n","protected":false},"excerpt":{"rendered":"
Windpower@LTEtt In 2007, the idea arose to add a wind turbine to the photovoltaic system on the roof of the Lyc\u00e9e Technique d\u2019Ettelbruck. During the 2007\/2008 academic year, two Year 6 pupils designed the system as part of their \u201cEnergy and Environment\u201d course. The installation site was determined, a suitable wind turbine was chosen and\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-29","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/pages\/29","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/comments?post=29"}],"version-history":[{"count":6,"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/pages\/29\/revisions"}],"predecessor-version":[{"id":117,"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/pages\/29\/revisions\/117"}],"wp:attachment":[{"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/media?parent=29"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

<\/td>\n	Antaris 1.7kW<\/strong><\/td>\n<\/tr>\n
Rotor<\/td>\n	3 GFK \u2013 rotor blades; \u00d8 3.50m; low-noise due to winglets; stall controlled<\/td>\n<\/tr>\n
Generator<\/td>\n	gearless; brushless; 3-phase; permanent magnet rotor (NdFeB); 10-pole<\/td>\n<\/tr>\n
Power transmission<\/td>\n	slip rings \/ cable<\/td>\n<\/tr>\n
Voltage<\/td>\n	up to 500 VDC<\/td>\n<\/tr>\n
Rated output<\/td>\n	1700 W<\/td>\n<\/tr>\n
Start-up speed<\/td>\n	2.4m\/s<\/td>\n<\/tr>\n
Nominal speed<\/td>\n	12m\/s<\/td>\n<\/tr>\n
Survival speed<\/td>\n	55m\/s<\/td>\n<\/tr>\n
Storm protection<\/td>\n	Voltage monitoring; helicopter position<\/td>\n<\/tr>\n
Weight<\/td>\n	89kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u00a0<\/strong><\/p>\n Mast <\/strong><\/p>\n A tilt mast was chosen to allow any potential changes to be made to the installation. The mast was designed and constructed by metal manufacturer Thill in Asselborn.<\/p>\n Mast technical data <\/strong><\/p>\n \n Mast made of tubular steel, \u00d8139.7 x 5.0mm \u2013 Quality S235<\/li>\n Mast head with flange \u00d8220 x 10.00 \u2013 identical to foot flange WKA<\/li>\n Mast foot with hinge, for folding with the help of a hoist or similar<\/li>\n 2 heavy-duty fastening brackets mounted to the building, with clamping screw and safety bolts featuring a padlock to prevent unauthorised unscrewing of the brackets<\/li>\n maximum wind resistance of the installation according to manufacturer specifications………………………………………………………………….. 40 kN<\/li>\n weight of installation, manufacturer specification………………….. 0.75 kN<\/li>\n maximum wind pressure to mast tube, derivation see appendix 08 ……………………………………………………………………… 858 kN\/m2<\/li>\n<\/ul>\n <\/p>\n Support reactions<\/strong><\/p>\n Perpendicular to the hinge<\/p>\n Fv= 0.75 + 6.0 x 0.166 = 1.75 kN<\/p>\n Horizontal to the brackets<\/p>\n FH=(1.40\u00d73.93+0.858\u00d70.14\u00d73.932 \/2)\/1.25= 5.14kN<\/p>\n Bending moment in tube at upper mount <\/strong><\/p>\n Moment caused by wind<\/p>\n M=1.40\u00d73.93 +0.858\u00d70.14\u00d73.932 \/2 = 6.43kNm<\/p>\n Deflection<\/p>\n f1=1\/3x140x393.03 \/2.10\/106 \/480.5= 2.81cm f2=1\/8\u00d785.8\u00d70.14\u00d73.93\u00d7393.03\/2.1\/106 \/480.5= 0.36cm f= 3.17 cm<\/p>\n Secondary moment caused by displacement M\u2019=(0.75+1\u20442\u00d76.0×0.166)x3.17\u00d710-2 =0.04kNm<\/p>\n Bending stress in tube <\/strong><\/p>\n \u03c3= 1.50 x 6.50 x 103 \/ 68.80 = 142 N\/mm2 (1.50 = dynamic coefficient)<\/p>\n Safety against the stress limit k= 240 \/ 142 = 1.69 \n $\"IMG_2381\"$ <\/a><\/p>\n Electrical installation <\/strong><\/p>\n The electricity generated is fed into the public grid via a grid inverter (Windy Boy 1100). \n $\"IMG_0951\"$ <\/a><\/p>\n *(caption) <\/em><\/p>\n* *Meter cabinet, frequency converter and inverter<\/p>\n* The electrical energy generated is reimbursed by the energy supply company. \n $\"Schaltplan\"$ <\/a><\/p>\n *(diagram)<\/em><\/p>\n* *Generator mit 3 Phasen = Generator with 3 phases<\/p>\n* *Schaltschrank = control cabinet<\/p>\n* *Energiez\u00e4hler = energy meter<\/p>\n* *Einspeisung ins Netz = feeding into the grid<\/p>\n* *\u00d6ffentliches Stromversorgung = public electricity supply<\/p>\n","protected":false},"excerpt":{"rendered":"* Windpower@LTEtt In 2007, the idea arose to add a wind turbine to the photovoltaic system on the roof of the Lyc\u00e9e Technique d\u2019Ettelbruck. During the 2007\/2008 academic year, two Year 6 pupils designed the system as part of their \u201cEnergy and Environment\u201d course. The installation site was determined, a suitable wind turbine was chosen and\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-29","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/pages\/29","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/comments?post=29"}],"version-history":[{"count":6,"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/pages\/29\/revisions"}],"predecessor-version":[{"id":117,"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/pages\/29\/revisions\/117"}],"wp:attachment":[{"href":"http:\/\/windmobile.lu\/en\/wp-json\/wp\/v2\/media?parent=29"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}