water emissivity 中文意思是什麼
water emissivity
解釋
水發射率- water : n 1 水；雨水；露；〈常作 pl 〉 礦泉，溫泉；藥水。2 〈常 pl 〉水體；水域；水道；海；湖；河；海域；...
- emissivity : n. 發射率，輻射系數。
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This model correctly judges the slagging tendency of a kind of coal - water slurry. measurements are taken of the temperature field, flame emissivity, superheater tube wall temperature, exhaust gas temperature and composition
本文介紹了燃油鍋爐改燒水煤漿后爐內傳熱及其污染物的排放測試結果，包括溫度場、火焰黑度、過熱器管壁溫度、排煙溫度、排煙成分。 -
The bigger the diameter, the high the heat efficiency, but the weak the temperature increasing ability, length has less effect on the heat efficiency, tilt angle has less effect on the flow field and temperature field while it is larger than 30 degree, vacuum degree and emissivity have great effect on the flow field and temperature field while there is a great temperature difference between the liquid in the tube and the surroundings, the furring has less effect on the heat transfer but should be cleaned up in 3 - 5 years because of poor water quality, the higher the solar flux or the more the temperature difference between the liquid and the surrounding, the more the heat loss and the lower the heat efficiency
分析了各種因素對太陽能真空集熱管流場和溫度場的影響。直徑越大，熱效率越高，但升溫能力弱；長度對熱效率影響不大；傾斜角度大於30后，自然對流已經能夠充分進行，考慮以能夠吸收到最大太陽輻射為主；真空度和發射率對熱效率和溫度場影響很大，尤其是在介質溫度與環境溫度差異比較大時；水垢對傳熱影響較小但由於水質的問題應該被3 5年清洗一次；太陽輻射強度越大，介質溫度與環境溫度差異越大，熱損失越大，效率越低； 4
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