課程名稱︰質能平衡 課程性質︰必 課程教師︰蔡偉博 開課學院：工 開課系所︰化工 考試日期（年月日）︰100/6/21 考試時限（分鐘）：120 是否需發放獎勵金：yes （如未明確表示，則不予發放） 試題 : 5. The following igure shows a process in which CO is burned with 70% of the theoretical air in Reactor 1. The combustion gases are used to generate stream, and also to transfer heat to the reactants in Reactor 2. A portion of the combustion gases that are used to heat the set of tubes in Reactor 2 are recycled. SO2 is oxidized in Reactor 2. You are asked to calculate the lb mol of CO burned per hour in Reactor 1. Figure: 等下傳 6. A dryer produces 200kg/hr of a product containing 10% water from a feed stream that cintains 1.25g of water per gram of dry material. The air enters the dryer at 100 degree C dry-bulb and a wet bulb temperature of 38 degree C ;the exit air leaves at 55 degree C dry-bulb and 70% RH, as shown in figure. Calculate the air and heat supplied to the heater, neglecting any heat lost by radiation, used in heating the conveyoranf so forth. The specific heat of the product is 0.18. dew point | air @ 20 degree C, 52% RH @38 C | ˇ |=========| |-- | Reactor |<----- | |=========| | ˇ ^ | |=========| | |---| dryer |-----------> exit air: 55 degreeC 70% RH --->|=========|-------------> product: 200kg/hr, 10% water 43 degree C feed: 21 degree C, 1.25g water/ g dry material Bonus question: 4kgs of water at 27 degree C and 200kPa are heated at constant pressure until the volume of the water becomes 1100 times the original valuve. What is the final temperature of the water? 各種表格請自備。 -- 人生到處知何似? 應似飛鴻踏雪泥。泥上偶然留指爪,鴻飛那復計東西。 老僧已死成新塔, 壞壁無由見舊題。往日崎嶇君知否？路長人困蹇驢嘶。 --

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