Pamene jenereta ya nthunzi imatulutsa nthunzi, imatulutsidwa kuchokera ku ng'anjo yamoto, ndipo nthunzi yomwe imatuluka mu boiler nthawi zonse imakhala ndi zonyansa pang'ono, zonyansa zina zimakhalapo mumadzimadzi, zonyansa zina zimatha kusungunuka mu nthunzi, komanso pangakhalenso zonyansa zochepa zomwe zimasakanizidwa mu nthunzi, zonyansa zoterezi nthawi zambiri zimakhala mchere wa sodium, carbon dioxide ndi amchere amchere.
Pamene nthunzi yokhala ndi zonyansa imadutsa mu superheater, zonyansa zina zimatha kudziunjikira pakhoma lamkati la chubu, zomwe zimapangitsa kuti pakhale mchere wambiri, womwe umawonjezera kutentha kwa khoma, kufulumizitsa kupsinjika kwachitsulo, komanso kuyambitsa ming'alu pazovuta kwambiri. Zonyansa zotsalira zimalowa mu turbine ya nthunzi ya boiler ndi nthunzi. Nthunzi imakula ndikugwira ntchito mu turbine ya nthunzi. Chifukwa cha kutsika kwa mphamvu ya nthunzi, zonyansa zimachulukana ndikuchulukana mu gawo loyenda la turbine ya nthunzi, zomwe zimapangitsa kuti pamwamba pa tsambalo, kusintha kwa mawonekedwe a mzere ndi kuchepetsa gawo loyendetsa nthunzi, zomwe zimapangitsa kuchepa kwa kutulutsa ndi mphamvu ya turbine ya nthunzi.
Kuonjezera apo, mchere womwe umapezeka mu valve yaikulu ya nthunzi umapangitsa kuti zikhale zovuta kutsegula valavu ndikuyitseka mosasamala. Ponena za nthunzi yopangira ndi mankhwalawo amalumikizana mwachindunji, ngati zonyansa zomwe zili mu nthunzi ndizokulirapo kuposa mtengo womwe watchulidwa, zidzakhudza momwe zinthu zilili komanso momwe zimagwirira ntchito. Choncho, khalidwe la nthunzi lomwe limatumizidwa ndi jenereta la nthunzi liyenera kukumana ndi zofunikira zamakono, ndipo kuyeretsedwa kwa nthunzi ya boiler kwakhala kofunika kwambiri, kotero kuti nthunzi ya boiler ya jenereta ya nthunzi iyenera kuchitidwa ndi kuyeretsa nthunzi.