Ikholo luyinsiza yamandla ebalulekile esebenziswe kwazulu, futhi ukuqonda okuqukethwe kwamandla kwayo kubalulekile ukuze kusetshenziswe kahle. Izindlela ezimbili ezibalulekile ezisetshenziselwa ukukala okuqukethwe kwamandla kohlangothi lwezikhumba yizinga le-Gross Calorific Value (GCV) neyendawo ye-Net Calorific Value (NCV). Le ndatshana ihlola izindlela ezilula zokuguqula i-GCV ibe yi-NCV, ihlinzeka ngokuqonda okucacile kulezi zimiso kanye nezibalwa zazo.
I-Gross Calorific Value (GCV), eyaziwa nangokuthi i-Higher Heating Value (HHV), iyinani eliphelele lokushisa elikhishwa lapho inani ethile lecoal lidlula ngokuphelele. Ikhuluza nobushushu obufihliwe bokuphola kwamanzi.
Inani Lendawo Yokushisa (NCV), elaziwa nangokuthi Inani Lokushisa Eliphansi (LHV), iyinani lokushisa elikhishwa ngesikhathi sokushisa, ngaphandle kokufaka i-heat yokushisa kwamanzi. I-NCV iyisilinganiso esisebenziseka kalula sokuhamba kwamandla njengoba ibonisa amandla angokoqobo asebenziseka.
Ukuguqula i-GCV ibe yi-NCV kubalulekile ukuze:
Ukuguqulwa kusuka ku-GCV kuya ku-NCV kuhlanganisa ukubala amandla alahlekile ngenxa komswakama okufakwa ngaphakathi kwekhabhoni. Izindlela ezilula zokwenza lokhu kuhlaziywa ngezansi:
Le ndlela isebenzisa ifomula elula yokuguqula i-GCV ibe i-NCV:
\[\text{NCV} = \text{GCV} – (M \times 24.44)\]
Where: Lapho:
– I-NCV iyinani lokushisa elihlanzekile.
– I-GCV iyisikhathi sokukhala esiphezulu.
– M uyinkomba yesisindo somswakama ku-coal.
Le ndlela isebenzisa ifomula yesayensi eyibheka kokubili ubunzima bokwazisa kanye nokuqukethwe kwe-hydrogen:
\[\text{I-NCV} = \text{I-GCV} – (M \times 24.44) – (H \times 9 \times 2.44)\]
Where: Lapho:
– I-H iyiphesenti yokuqukethwe kwe-hydrogen kwi-coal.
Ukuze kutholakale izilinganiso ezisheshayo, kungasetshenziswa ukufanisa okulula:
Le ndlela icabanga ukuthi cishe u-5% wamandla ulahlekileyo ngenxa yokushisa nokuphakelwa kwe-hydrogen, inikeza ukuphakathi kokulinganisa okuthile okufanele ukuhlolwa kokuqala.
Ukuguqulela i-GCV kwi-NCV kuwumsebenzi obalulekile ukuze kuhlolwe kahle okuqukethwe kwamandla kwekhalori. Ngokusebenzisa izindlela سهلة zokubala, njengezindlela eziyisisekelo, izindlela ezisemqoka, nezilinganiso ezilula, abathintekayo bangathatha izinqumo ezifanele mayelana nokusetshenziswa kwekhalori. Ukuqonda lezi zindlela zokuguqula kuqinisekisa ukuphumelela kahle kwamandla, ukuphathwa kwezindleko, nokuziphatha kahle emvelweni ekusetshenzisweni kwekhalori.
