Thursday, 19 July 2012
More Energy Concerns
Dr Gary Kendall wrote a piece for the Mail & Guardian which subsequently was printed in the Pretoria news on the 19th July 2012. He makes a case for electric vehicles even though the primary power may have been generated by coal fired power stations.
http://www.thoughtleader.co.za/garykendall/2012/05/26/realising-the-potential-of-electricity/
Tuesday, 17 July 2012
Energy bits and pieces
There has been much analysis about the cost of various technologies used to supply energy. This note will try and list some of the articles that I have come across.
http://www.theoildrum.com/node/1863
This is a link to one of Jeremy Wakeford's column:
http://www.engineeringnews.co.za/article/energy-return-on-energy-invested-2012-06-15
And this is a comment from one of Terry Mackenzie-Hoy's columns:
A big wind turbine (Vesta 152) weighs 267 t, so, if it is all steel (which it is not), it must produce at least 4 200 000 000 000 kJ over its life time. If it is a 2 500 kW turbine, then, over 2 000 windy hours in a year, it will produce 180 000 000 000 kJ. Thus, many years will pass before it actually produces more power than it generates. And, on a production basis, a wind turbine has negative energy consumption. So, why, oh, why, are these projects going ahead? Or even being contemplated? ( http://www.engineeringnews.co.za/article/the-csir-blunders-on-2012-02-03 )
Terry Mackenzie-Hoy replied to my query in a July 2012 article:
http://www.engineeringnews.co.za/article/energy-return-on-energy-invested-2012-07-13
Terry was quite scathing about wind energy in an earlier article in April to the extent that his tongue nearly got stuck in his cheek:
http://www.engineeringnews.co.za/article/wind-farms-may-well-be-another-bubble-that-is-doomed-to-burst-2012-04-06
http://www.theoildrum.com/node/1863
This is a link to one of Jeremy Wakeford's column:
http://www.engineeringnews.co.za/article/energy-return-on-energy-invested-2012-06-15
And this is a comment from one of Terry Mackenzie-Hoy's columns:
A big wind turbine (Vesta 152) weighs 267 t, so, if it is all steel (which it is not), it must produce at least 4 200 000 000 000 kJ over its life time. If it is a 2 500 kW turbine, then, over 2 000 windy hours in a year, it will produce 180 000 000 000 kJ. Thus, many years will pass before it actually produces more power than it generates. And, on a production basis, a wind turbine has negative energy consumption. So, why, oh, why, are these projects going ahead? Or even being contemplated? ( http://www.engineeringnews.co.za/article/the-csir-blunders-on-2012-02-03 )
Terry Mackenzie-Hoy replied to my query in a July 2012 article:
http://www.engineeringnews.co.za/article/energy-return-on-energy-invested-2012-07-13
Terry was quite scathing about wind energy in an earlier article in April to the extent that his tongue nearly got stuck in his cheek:
http://www.engineeringnews.co.za/article/wind-farms-may-well-be-another-bubble-that-is-doomed-to-burst-2012-04-06
Labels:
electricity wind energy,
EROI,
nuclear,
renewable energy
Friday, 13 July 2012
Funding for Education
Education for profit: Is this necessarily bad? - Curro Holdings
Affordable private education deal signed
JSE-listed private education firm Curro Holdings has signed a deal
with Old Mutual and the PIC to expand private education to those who
cannot afford it.Affordable private education deal signed
http://www.fin24.com/Companies/Investment-Holdings/Curro-makes-more-acquisitions-20111214
Theres-a-lesson-here-20110725
Wednesday, 30 November 2011
Changes in the South African Nuclear Community
There were a few important announcements today.
Dr Rob Adam will leave Necsa at the end of January to join the construction group, Aveng.
Engineering News article.
This is a slightly dated report about Aveng.
Dr Rob Adam will leave Necsa at the end of January to join the construction group, Aveng.
Engineering News article.
This is a slightly dated report about Aveng.
Tuesday, 25 October 2011
Sereto sa baMohlala
Labels:
direto,
oral literature,
poetry,
praise poem,
sepedi,
sereto,
sesotho sa lebowa,
sotho
Thursday, 29 September 2011
KHUDUKOTENG
Ge a be a roka seatla sa molemi wa mengwaga ye 75, yo a gobaditšego seatla sa gagwe mo kgorong ge a be a hlokomela dikgomo, ngaka a thoma poledišano le molemi wo.
Mafelelong poledišano ye e ile ya ba mabapi le ANC le Julius Malema.
Molemi yo a tšofetšego o ile are: “Ka dikgopolo tša ka, Malema ke khudukoteng."
Ka lebaka la go sa tsebe lentšu leo, ngaka o ile a botšiša, “khudukoteng” ke eng.
Molemi yo a tšofetšego a re: “Ge o otlela mo tseleng ya magaeng, wa hwetša kota ya legora e nametšwe ke khudu e tekateka mo godimo, yona yeo ke “khudukoteng"."
Molemi yo a tšofetšego a bona gore ngaka o makatše, a tšwelapele go hlaloša.
“O tseba gore, ga se ya inametša, ga ya swanela go ba kua godimo, ga e tsebe seo e swanetšego go ka se dira ge e le kua godimo, o ka ipotšiša gore ke setlatla sa mohuta mang seo se e beilego godimo go tloga mathomong."
Наттс Ханни Theresho thwii!
Nthekgo Moroaswi Ke nnete, bjalo ka gore naga ye ya'bo rena e tletse ka di khudukoteng, ke gora gore baa reresa ge bare "people deserve their leaders".
Ramadimetše Gadifele Moroaswi "...o ka ipotšiša gore ke setlatla sa mohuta mang seo se e beilego godimo go tloga mathomong!" Seota-ota, mogagešo! Lešilapuleng la mafelelo!
НаттсХанни Leshilapuleng le le nago barutwana ba go swana le lona!
Kehlotše Moroaswi Hahahahahaha!
Khomotjo MissTjo Mphahlele Ke ntjebela! Hahahahha!
Khutjo Boledi Mothapo Leshilapuleng leo le lona le maketje gore ke ka lebaka la eng khudukoteng e tekateka mola a ka no e folosha. ke rata molemi o we......Lol
Maggie Moroaswi Pele leshilapuleng le ka folosha khudukoteng ya leseanyana, ga e thome ka khudukoteng ya mokgalabje
Kanyane Sefala Haaahaaa, haaai!
Keletjo Chiloane Dikhudukoteng gape le ge di tsea ke moya, di bona nke di tswela pele di duTse mi koteng. Di re kgane ga re di bone gore ga tsa swanelwa ke go ba mo koteng.
Machoene Hlungwane Molemi yo o tseba ditaba e le ruri. Eish
Obed Phahlane wrote: "A khudu e botsana!!"
Steve Hayes wrote: "http://www.wandleys.demon.co.uk/punch20.htm"
Ronald Mahlak'o Mokgwatsana wrote: "Ngwato!!"
Honey Mamabolo wrote: "O opile kgomo lenaka, Ngwato!bull's eye"
Selaelo Matabane wrote: "Lol! "
Phoda Mapeka wrote: "So true!"
Portia Matlejoane wrote: "Kwakwalling!"
Marot'aeme Lvovo Mangmang wrote: "Hahaha"
Tumi Bapela- Anthony wrote: "lol!"
Labels:
jokes,
post turtle,
sepedi,
sesotho sa leboa,
South African Politics
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