{"id":2159,"date":"2013-02-15T08:51:37","date_gmt":"2013-02-15T08:51:37","guid":{"rendered":"http:\/\/mauritiustimes.com\/mt\/2013\/02\/15\/sydney-selvon-8\/"},"modified":"2019-04-16T15:06:15","modified_gmt":"2019-04-16T11:06:15","slug":"sydney-selvon-8","status":"publish","type":"post","link":"https:\/\/www.mauritiustimes.com\/mt\/sydney-selvon-8\/","title":{"rendered":"La d\u00e9raison qui fait perdre la t\u00eate"},"content":{"rendered":"

By Sydney Selvon<\/strong><\/span><\/p>\n

Les journalistes, militants \u00e9cologistes et les politiciens doivent apprendre \u00e0 \u00e9duquer syst\u00e9matiquement les gens, m\u00eame de mani\u00e8re r\u00e9p\u00e9titive, pour \u00e9viter que les marchands de haine ne passent par l\u00e0\u2026<\/span><\/em><\/span><\/p>\n

Je suis tr\u00e8s inquiet pour le pays. Beaucoup de gens prennent l’affaire de personnalit\u00e9s en vue ou dans les coulisses pour une histoire de guerre entre communaut\u00e9s, alors que tel n’est pas le cas.<\/span><\/p>\n

Que c\u2019est triste pour certains journalistes, surtout de la jeune g\u00e9n\u00e9ration, qui privil\u00e9gient la cause sentimentale au d\u00e9triment de ce qui doit \u00eatre des priorit\u00e9s\u00a0! <\/span><\/p>\n

A leur place, j’aurais cess\u00e9 d’alimenter le communalisme aussi inconsciemment en SEULEMENT questionnant la l\u00e9galit\u00e9 des CONTRATS portant sur l’argent public. Ce n’est pas \u00e0 la presse de prouver des relations intimes. Il ne faut pas que ces relations prennent le dessus sur les aspects de l\u00e9galit\u00e9 des contrats avec Airports of Mauritius ou celui sign\u00e9 avec SICOM. Il est du ressort de la justice de s’enqu\u00e9rir des relations, intimes ou pas, qui peuvent avoir men\u00e9 \u00e0 ces contrats et il y a sans doute d’autres aspects des contrats \u00e0 souligner plus que l\u2019intimit\u00e9 des uns et des autres. <\/span><\/p>\n

C’est, dans une soci\u00e9t\u00e9 fragile comme la n\u00f4tre, une question d’emphase sur quel ou quel aspect \u00e0 traiter prioritairement, m\u00eame si, quelque part, un jeu de relations intimes ayant motiv\u00e9 quelque ill\u00e9galit\u00e9 pourrait \u00e9ventuellement \u00eatre d\u00e9cel\u00e9e. Je suis choqu\u00e9 de voir comment les priorit\u00e9s sont renvers\u00e9es par certains journalistes. Il faut changer avant qu’il ne soit trop tard, car la presse se doit de garder de croire qu\u2019elle a prouv\u00e9 une culpabilit\u00e9.<\/span><\/p>\n

Un autre probl\u00e8me qui \u2013 le ridicule ne tue pas \u2013 a \u00e9t\u00e9 communalis\u00e9 est celui du charbon. En plus, il n\u2019y a eu aucun vrai d\u00e9bat sur les technologies anti-polluantes maintenant tr\u00e8s avanc\u00e9es pour ce qui est de l\u2019usage du charbon pour produire de l\u2019\u00e9lectricit\u00e9. Le \u00ab\u00a0No to Coal\u00a0\u00bb est, je m\u2019excuse, un peu simpliste, surtout qu\u2019on ne parle pas aussi du lieu o\u00f9 il ferait mieux de construire un central charbon. Cela fait l\u00e0 deux manquements graves pour un d\u00e9bat important.<\/span><\/p>\n

Le sacrifice de Jeff Lingaya doit servir au moins \u00e0 faire ce que j\u2019ai toujours recommand\u00e9\u00a0: les d\u00e9cisions pareilles doivent \u00eatre prises comme en Australie m\u00eame si un gouvernement a obtenu la majorit\u00e9 aux \u00e9lections g\u00e9n\u00e9rales. Ce genre de d\u00e9cision passe par un d\u00e9bat dans tous les quartiers de villes et villages au centre social ou autre salle publique de conf\u00e9rences o\u00f9 le public est invit\u00e9 \u00e0 discuter avec des sp\u00e9cialistes. Dans le cas pr\u00e9sent, sur l\u2019\u00e9nergie et l\u2019environnement. Puis, le gouvernement produit une conclusion et amende son projet pour r\u00e9pondre au maximum des risques soulign\u00e9s. Et le projet va de l\u2019avant. On devrait faire le tour de Maurice, des municipalit\u00e9s et villages pour le central charbon.<\/span><\/p>\n

Il existe trois technologies principales, selon la World Coal Association pour r\u00e9duire au minimum les \u00e9missions toxiques et d\u00e9chets du charbon utilis\u00e9 pour produire de l\u2019\u00e9lectricit\u00e9. La premi\u00e8re est l\u2019utilisation d\u2019un r\u00e9acteur comprenant un \u2018lit\u2019 \u00e0 travers lequel un gaz est envoy\u00e9 pour maintenir le combustible dans un \u00e9tat de turbulence, ce qui entra\u00eene une combustion am\u00e9lior\u00e9e, un transfert plus productif de chaleur et une r\u00e9cup\u00e9ration plus efficace des d\u00e9chets. La troisi\u00e8me m\u00e9thode est la gazification, utilis\u00e9e notamment au Danemark et utilisant des chaleurs et des pressions plus \u00e9lev\u00e9es qui r\u00e9duisent les \u00e9missions et d\u00e9chets toxiques. Les r\u00e9ductions de gaz et d\u00e9chets toxiques sont de l\u2019ordre de 40% \u00e0 90%.<\/span><\/p>\n

Autrement, si les \u00e9cologistes peuvent nous indiquer des technologies alternatives, qu\u2019ils le fassent pour que Maurice ne soit pas en panne g\u00e9n\u00e9rale d\u2019\u00e9lectricit\u00e9 dans quelque temps. On br\u00fble bien de la bagasse et aussi les cannes dans les champs, ce qui pollue beaucoup les maisons et les cours des gens \u00e0 la campagne depuis des ann\u00e9es d\u00e9j\u00e0. Je n\u2019\u00e9cris pas pour \u00eatre \u2018politiquement correct\u2019 mais pour dire les choses comme je les trouve.<\/span><\/p>\n

Ci-dessous les explications simples de la WCA (SOx et NOx sont les multiples combinaisons des atomes du souffre et de l\u2019azote avec l\u2019oxyg\u00e8ne, soit les divers types de Sulphur oxide et de Nitrogen oxide)\u00a0:<\/span><\/p>\n

Fluidised Bed Combustion Fluidised Bed Combustion (FBC)<\/span><\/em><\/strong><\/span><\/p>\n

\u201cFluidised Bed Combustion Fluidised Bed Combustion (FBC) is a very flexible method of electricity production \u2013 most combustible material can be burnt including coal, biomass and general waste. FBC systems improve the environmental impact of coal-based electricity, reducing SOx and NOx emissions by 90%… FBC systems fit into two groups, non-pressurised systems (FBC) and pressurised systems (PFBC), and two subgroups, circulating or bubbling fluidised bed. Non-pressurised FBC systems operate at atmospheric pressure and are the most widely applied type of FBC. They have efficiencies similar to PCC \u2013 30-40% Pressurised FBC systems operate at elevated pressures and produce a high-pressure gas stream that can drive a gas turbine, creating a more efficient combined cycle system \u2013 over 40% Bubbling uses a low fluidising velocity \u2013 so that the particles are held mainly in a bed \u2013 and is generally used with small plants offering a non-pressurised efficiency of around 30% Circulating uses a higher fluidising velocity \u2013 so the particles are constantly held in the flue gases \u2013 and are used for much larger plant offering efficiency of over 40%. The flexibility of FBC systems allows them to utilise abandoned coal waste that previously would not be used due to its poor quality.<\/span><\/p>\n

Supercritical & Ultra-supercritical Technology<\/span><\/em><\/strong><\/span><\/p>\n

\u201cNew pulverised coal combustion systems \u2013 utilising supercritical and ultra-supercritical technology \u2013 operate at increasingly higher temperatures and pressures and therefore achieve higher efficiencies than conventional PCC units and significant CO2 reductions. Supercritical steam cycle technology has been used for decades and is becoming the system of choice for new commercial coal-fired plants in many countries. Research and development is under way for ultra-supercritical units operating at even higher efficiencies, potentially up to around 50%. The introduction of ultra-supercritical technology has been driven over recent years in countries such as Denmark, Germany and Japan, in order to achieve improved plant efficiencies and reduce fuel costs.<\/span><\/em><\/span><\/p>\n

Integrated Gasification Combined Cycle (IGCC)<\/span><\/em><\/strong><\/span><\/p>\n

\u201cAn alternative to achieving efficiency improvements in conventional pulverised coal-fired power stations is through the use of gasification technology. IGCC plants use a gasifier to convert coal (or other carbon-based materials) to syngas, which drives a combined cycle turbine. Coal is combined with oxygen and steam in the gasifier to produce the syngas, which is mainly H2 and carbon monoxide (CO). The gas is then cleaned to remove impurities, such as sulphur, and the syngas is used in a gas turbine to produce electricity. Waste heat from the gas turbine is recovered to create steam which drives a steam turbine, producing more electricity \u2013 hence a combined cycle system. By adding a \u2018shift\u2019 reaction, additional hydrogen can be produced and the CO can be converted to CO2 which can then be captured and stored. IGCC efficiencies typically reach the mid-40s, although plant designs offering around 50% efficiencies are achievable.\u201d<\/span><\/em><\/span><\/p>\n

Les journalistes, militants \u00e9cologistes et les politiciens doivent apprendre \u00e0 \u00e9duquer syst\u00e9matiquement les gens, m\u00eame de mani\u00e8re r\u00e9p\u00e9titive, pour \u00e9viter que les marchands de haine ne passent par l\u00e0\u2026<\/span><\/p>\n

\n

* Published in print edition on 15 February 2013<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

By Sydney Selvon<\/p>\n","protected":false},"author":92,"featured_media":6560,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[27],"tags":[16598,1246,16597],"class_list":["post-2159","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-society","tag-fluidised-bed-combustion","tag-sydney-selvon","tag-world-coal-association"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.mauritiustimes.com\/mt\/wp-content\/uploads\/2016\/12\/MT-Logokk.jpg?fit=1200%2C880&ssl=1","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8QzSF-yP","_links":{"self":[{"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/posts\/2159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/users\/92"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/comments?post=2159"}],"version-history":[{"count":0,"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/posts\/2159\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/media\/6560"}],"wp:attachment":[{"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/media?parent=2159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/categories?post=2159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mauritiustimes.com\/mt\/wp-json\/wp\/v2\/tags?post=2159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}