問(wèn)答題計(jì)算題:某電廠機(jī)組滑參數(shù)啟動(dòng)時(shí),汽輪機(jī)沖動(dòng)壓力為P過(guò)=1.5MPa,對(duì)應(yīng)的蒸汽飽和溫度為t飽=197.37℃,沖轉(zhuǎn)時(shí)主汽溫度t過(guò)=260℃,求沖轉(zhuǎn)時(shí)主蒸汽的過(guò)熱度是多少?

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