Ama-Variable-Speed Drive Units

Izikhungo zokushayela ezishintshashintshayo zikhangisa ukuthuthuka okubalulekile kubuchwepheshe bokukhipha amanzi emithonjeni ejulile, kuvumela izinsiza zokumpompa eziphakanyisiwe ukuba zisebenze kahle kakhulu ezimweni ezihlukahlukene zezemvula ezitholakala ngesikhathi sokwakhiwa kwezakhiwo nezinhlelo zokumba ezijulile. Lezi zinhlelo ze-electromechanical zisebenzisa izitshalo ezinesivinini esishintshashintshayo (VFDs) noma ubuchwepheshe bokushintsha amandla ukuze zilungise isivinini semotor nokusetshenziswa kwamandla ngokususelwa esicelweni samanzi samanje, kuguqula ngempela indlela abakhangisi abaphatha ngayo ukukhipha amanzi emithonjeni ejulile nasemabhalweni agcwele. Ezinhlelweni zokwakha izizinda, lapho ukusebenza kokukhipha amanzi kungathatha izinyanga futhi kudinga ukulawulwa ngendlela eqondile kwezinga lokwehliswa kwamanzi, izikhungo zokushayela ezishintshashintshayo ziletha izinzuzo ezinkulu zokusebenza nezomnotho ngokulungelelanisa ukusebenza kwamapompo nezinga lamanzi eliguquguqukayo, ukushintsha kwemvula kwesizini, kanye nezidingo zokugeleza ezithuthukayo phakathi nesikhathi sokwakha. Ukusetshenziswa kobuchwepheshe bama-variable-speed drive kudinga izinhlelo zokulawula ezithuthukisiwe ezihlola njalo ingcindezi yokukhishwa, izinga lamanzi, kanye nesidingo sesistimu, zishintsha ngokuzenzakalelayo isivinini sokujikeleza semotor ye-pump yokuphakama ukuze kugcinwe izimo ezikahle zokusebenza. Le nketho ibaluleke kakhulu ezindaweni ze-geotechnical eziyinkimbinkimbi lapho imithombo yomhlaba ibonisa izici ezihlukahlukene zokudluliswa—kusukela ezindaweni ezintsha ezinamandla okuphumela kuze kube yimifuze ephezulu namazwe alula ezitingayo nezindaza ezidinga ukulawulwa kokugeleza ukuze kuvinjwe ukuhamba komhlaba noma izenzakalo zokugeleza. Ngokunciphisa isivinini semotor ngezikhathi zokuphakanyiswa okuphansi, lezi zinhlelo zithuthukisa ukusetyenziswa kwamandla ngokufinyelela ku-30-50% uma kuqhathaniswa nezinketho zokushayela ezibekwe phansi, okuyinzuzo enkulu uma kubhekwa izidingo zokuqonda amandla ezokuphusha emithonjeni ejulile. Ubuchwepheshe be-VFD buphinde buxhase isikhathi sokuphila kwemishini ngokunciphisa umthwalo wezokusebenza, ukwehla okuthule, kanye nezinga eliphansi lokugqoka kumashidi apompo kanye nezishintshi zomthwalo. Izicelo emsebenzini wezimiso ezijulile zifaka izimo ezahlukahlukene kuhlanganisa ukuhucululwa kwezakhiwo, ukuchithwa kwe-pile cap, ukwakhiwa ngaphansi kwamanzi, nezinhlelo eziqhubekayo zokwakha ezisezingeni eliphansi. Izikhungo zokushayela ezishintshashintshayo ziphumelele kumarhwebi wokukhipha amanzi amaningi lapho ukuphathwa kokwehliswa okuhlanganyelayo phakathi kwamathoni amaningi kudinga ukulungiswa okuqhubekayo kwemisebenzi yompompo ngenkathi yohambo. Emhlabeni ongenamanzi, lapho ukulawulwa kwamanzi kuthinta ngqo ukuqina nokuphepha kokuhamba, ukulawulwa okukhululekile kokugeleza okutholakala ngezikhungo ezishintshashintshayo kuvumela abakhangisi ukugcina izinga lamanzi elibalulekile ngaphandle kokwehliswa ngokweqile okungase kubangele ukulunywa kwempahla edidiyelwe. Ukuhlanganiswa kwalezi zikhungo nezikhungo zokupompa eziphakanyisiwe eziphethe ukujula kusuka ku-50 ukuya kwezingaphezu kwama-300 metres kubonisa ukuvuseleleka kwazo ezimweni zamandla amanzi aphakeme ezivamile izindawo zokwakha zezilwandle nezithunzi eziphakeme kanye nezinhlelo ezijulile ze-aquifer. Izikhungo zangalesi sikhathi zibandakanya amakontroller alungiselelwe, amandla okuhlola kude, kanye neziqondiso zokucima ezenzakalelayo ezithuthukisa ukuphepha kwesayithi futhi zikhuthaza ukuvumelana nemithetho yokuvikela imvelo ephathelene nokuphathwa kwamanzi ngaphansi komhlaba nasekutholeni izinhlaka ngaphakathi kwezinhlelo zokwakha ezinkulu.