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操作量熱儀前需要准備些什麽，量熱儀的理想絕熱條件有哪些

发布时间：2013-06-20 点击次数：1335次

　　操作量熱儀前需要准備些什麽，量熱儀的理想絕熱條件有哪些

　　在能源發熱量的測量上，量熱儀的使用是非常頻繁的。如果您想知道能源的發熱量，在對其進行檢測的前，最好能夠了解會對實驗結果産生影響的因素，最好能夠對量熱儀理想絕熱需要達到的條件有更深的認識。下面鶴壁市恒科儀器儀表的工作人員將給大家解析量熱儀操作時的各個注意事項，希望能夠幫助大家更加純熟的使用！

　　知識點1：操作量熱儀前的准備工作

　　在使用量熱儀測量煤炭發熱量時，主要是在氧彈中進行實驗的，因此要想精確地測得試樣的發熱量，就需要做好下面兩個事宜：

　　知道量熱儀的熱容量，即設備的量熱系統溫度每升高1℃所接收的熱量，量熱儀的熱容量可通過已知熱值的基准物（苯甲酸）來標定。

　　解決量熱系統與外界的熱交流問題。爲了減少量熱儀與外界發生熱傳遞，可在量熱系統四周加一雙壁水套，削減量熱系統與外界發生熱交流。

　　知識點2：量熱儀的理想絕熱條件

　　只有在理想絕熱狀態下，量熱儀的系統和環境之間才可以沒有任何熱交流，能夠得到最精確的煤炭發熱量。那麽理想絕熱需要什麽條件呢？首先，加快試樣反映的速度，使熱量在短時間內無法溢出，將熱量損失降到最低。其次，將量熱儀的測量系統與環境阻隔開來，如增加一雙壁水套。最後，調節好實驗室的溫度，使它盡量與測量系統溫度保持一致。

　　文章知識彙總：爲了能夠讓量熱儀在絕熱條件下進行相關實驗，各位操作人員一定要詳細的-了解上述事宜，以便提高量熱儀的測量精度。如果你想了解更多關于量熱儀使用方面的知識，請繼續關注我們的網站。

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