thermal air current 中文意思是什麼
thermal air current
解釋
熱空氣流-
Electric cables - calculation of the current rating - thermal resistance - a method for calculating reduction factors for groups of cables in free air, protected from solar radiation
電纜.額定電流的計算.熱變電阻.室外避免太陽輻射的電纜組減縮系數的計算方法 -
The optimum conditions for air electrode preparation were shown as follow : 20 % ptfe and 20 % mno2 in active layer, thickness of active layer 0. 15 - 0. 25mm and the ratio of active carbon to ethine black 4 : 1 ; 60 % ptfe in the gas diffusion and waterproof layer, employing na2so4 as pore - making agents, thickness 0. 35 - 0. 45mm, colding forming and layer sequence catlytic layer / gas diffusion and waterproof layer / current collector layout ; employing 40 meshed nickel screen as current collector and thermal treatment temperature over 200
確定了制備空氣電極的優化工藝條件，催化層中ptfe含量約20 ， mno _ 2的最佳含量約為20 ，催化層中活性炭和乙炔黑的比例為4 ： 1 （質量比） ，厚度在0 . 15 - 0 . 25mm之間。防水透氣層中ptfe的含量約為60 ，以無水硫酸鈉作為造孔劑，厚度一般為0 . 35 - 0 . 45mm 。電極各層採用催化層/防水透氣層/集流體的排布方式，冷壓成型，熱處理對空氣電極的性能影響較大，熱處理溫度不低於200 。 -
Electric cables - calculation of the current rating - part 2 : thermal resistance - section 2 : a method for calculating reduction factors for groups of cables in free air, protected from solar radiation
電纜.額定電流的計算.第2部分:熱絕緣電阻.第2節:室外避免陽光照射的電纜組用計算簡化系數的方法 -
Sensors are used to detect the content of water and the temperature of grains, to measure the velocity of influx and to position the grains in the drying machines respectively. thermal sensors are thermocouples to monitor the temperature of heated air current and thermo resistances to measure the temperature of grains on different surfaces ; water sensors include neutron probes and condensates to measure the content of water of grains before and after drying respectively ; the velocity of flow of grains is measured by the indicators of flow
溫度傳感器主要採用熱電偶和熱電阻，分別探測熱風溫度和乾燥機各個層面上的糧食溫度；水分傳感器主要採用中子式在線水分測量儀和電容式在線水分測量儀，中子式在線水分測量儀由於不受穀物解凍的影響，用來測量烘前穀物的水分，電容式在線水分測量儀用來測定烘后的糧食水分；在線流量計採用沖板式流量計，用來記錄排糧流量，統計產量。
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