Abathwali begesi, yingakho i-methane idume kakhulu

Ukuhlinzekwa kwegesi i iveni kuya ngokuya kuvama: idatha yokuthengisa ye-methane esindayo, kokubili okunegesi kanye ne-liquefied, kusuka ngo-2018 kuya ku-2019 ekukhuliseni okuphezulu, ngokungafani naleyo eqoshwe imidiya ehlinzekwe kuyo udizili... Kodwa kungani?

Ukuhlinzekwa kwe-methane, kokubili okuyigesi noketshezi, kuya kuba yimpumelelo kakhulu ngoba kusabela ngempumelelo ikakhulukazi izidingo ezimbili, ngakolunye uhlangothi, ukuncishiswa izindleko zokusebenza kanye nomthelela wemvelo wezinto zokuthutha ezinkulu.

Izindleko ezehlisiwe ngekhilomitha ngalinye nomoya oluhlaza

Esimweni sokuqala, ebangeni elifanayo kg eyodwa uketshezi noma igesi imethane ibiza kufika 50 amasenti ngaphansi kwe ilitha uphethiloli we-diesel, ukunethezeka okwamanje kusanqunyelwe izindleko eziphakeme zezimoto zikaphethiloli. Eqinisweni, banohlu lwamanani aphezulu kakhulu kunamamodeli edizili anamandla afanayo, futhi aphinde kabili uma kwenzeka amamodeli anezinhlelo ze-LPG noma I-SPG, ngenxa ekhethekile amathangi e-cryogenicokudingekayo ukugcina i-methane ewuketshezi emazingeni okushisa aphansi nezingcindezi.

Nokho, utshalomali lubuyiselwe ukuzimela okukhulu yona, ekwazi ukuphinda kabili uma iqhathaniswa ne-methane egcinwe kwifomu yegesi, ifinyelele ku-1.600 km. Ngokombono wemvelo, bonke ubufakazi buvuna izinjini zegesi yemvelo; Ukukhishwa kwe-CO2 kwehliswa ngo 15% (kanye ne-psoson odominuire futhi uma i-bio methane evela emithonjeni evuselelekayo) ama-nitrogen oxides ehla 60% futhi kuyilapho ama-sulphur oxides nothuli olucolisekile kususwa ngokuphelele ngokuphelele (99%).

Quadrature… umjikelezo

Ngisho maqondana nokusebenza, ukuqhathanisa kuhlala kuyiqiniso: ngokungafani nomkhakha ezezimotolapho ukuguqulelwa ku-methane bekulokhu kunomgomo wezomnotho olinganiselwe ngokuhwebelana kokusebenza, nakanjani nesizotha, emalolini ngisho nezici zegesi ziphakeme kakhulu ukuncintisana.

Isizathu silele ku uhlobo lwenjini ezisetshenzisiwe: ezimotweni zabagibeli, ukuguqulwa kwamayunithi kaphethiloli kuya kusilinganiso sokucindezelwa kungcono ngezansi esebenzisa imisebenzi emincane futhi ikhono lokulwa nokungqongqoza (enenombolo ye-octane ephakeme kune 30% uma kuqhathaniswa nophethiloli) i-methane. Izimfanelo eziyenza ifaneleke kakhulu ukusetshenziswa ezinhlobonhlobo zenjini a Umjikelezo wediziliokungenamsebenzi ezimotweni (okwakunomnotho owanele we-diesel), kodwa namuhla okuthola isikwele esiphelele esindayo. 

Ukuthuthuka kwezobuchwepheshe nakho kuyakuvumela nokwethenjelwa, manje isilingana nodizili, ngezikhathi ezithile insiza ama-analogue lapho kungezwe izinga eliphansi lomsindo, izinzuzo zomshayeli kanye nemvelo, okuvumela ukusetshenziswa kwamamodeli e-methane isimo sasemadolobheni ngisho nasebusuku.

Umholi we-Iveco, abaseSweden behamba

Okwanamuhla nje abanye abakhi kugunyazwe isizathu sokuvela kwe-methane ewuketshezi emalolini: I-Iveco, i-Scania ne-Volvo Trucks, ikakhulukazi, anezinhlobo eziningi zoketshezi olusindayo noma i-gaseous methane ohlwini lwazo. Iveco ikakhulukazi entwasahlobo 2019 (kanye ne-eco-incentives abanikeze ngaphambili I-20.000 Euro ukuze kuthengwe i-LNG esindayo) emelwe85% ukuthengisa. Ezinye izikhondlakhondla ezifana neMercedes, egxilisa amandla ayo kugesi, esikhundleni salokho zenelise ukukhetha okuthile njenge-Econic NGT eklanyelwe ukuqoqa udoti.