如果格式合同不叫定金而叫购房意向金应双倍返还吗-.doc

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1、化学工程基础习题第二章P691.解:2.解:3.解:对于稳定流态的流体通过圆形管道,有若将直径减小一半,即即液体的流速为原流速的4倍.4.解:即产生的能量损失为原来的16倍。6.解:1)雷诺数其中,故故为湍流。2)要使管中水层流,则即解得7.解:取高位水槽液面为1-1,A-A截面为2-2截面,由伯努利方程其中则解得1)A-A截面处流量2)其中8.解:对1-1截面和2-2截面,由伯努利方程得其中15.解:选取贮槽液面为1-1截面,高位槽液面为2-2截面,由伯努利方程得其中:17.解:取水池液面为1-1截面,高位截面为2-2截面,由伯努利方程得其中:19.解:取贮槽液面为1-1截面,蒸发器内管路出

2、口为2-2截面,由伯努利方程得其中,20.解:1)取贮水池液面为1-1截面,出口管路压力表所在液面为2-2截面,由伯努利方程得其中,忽略出水管路水泵至压力表之间的阻力损失,则:衡算系统的阻力损失主要为吸入管路的阻力损失:2)3)取贮槽液面为1-1截面,水泵吸入管路上真空表处液面为2-2截面,由伯努利方程得其中:忽略进水管路水泵中真空表至水泵之间的阻力损失,则:衡算系统的阻力损失为吸入管路的阻力损失:得真空表的读数为23.解:1)取低位槽液面为1-1截面高位槽液面为2-2截面由伯努利方程得其中,2)在管路A、B截面间列伯努利方程得:3)4)根据静力学基本方程式:第三章 传热过程p105ex1解:

3、ex2解:Ex4解:空气的定性温度200时空气的物性参数为: , ex5解:水的定性温度30时水的物性参数为: 当时, 当时 ,此时,2000Re10000ex7解:甲烷的定性温度:0条件下: 由于甲烷是在非圆形管内流动,定性尺寸取de由于甲烷被冷却,若甲烷在管内流动:Ex8 ,(逆流)在按照折流校正0.97ex9(1) (2) ,(3) (4) 若近似按平面壁计算,则ex10(1) , ,(2) (3)ex11解:(1) (2) , ,又流量及物性不变, ,ex12解:(1) 吸收p187解:(1)(2)(3)(4)总压提高一倍,E、H值均不变ex9解:第一解法:第二解法:设吸收率为则,进气

4、量设为 ex10(1) 当液气比为2.2时, (2)当液气比为1.25时,(3) 当X2=0.00011时 (4) 当液气比为0.8,溶质的最大回收率时溶液出口达到气液平衡,ex11. 12.(1)(2) n=0.0202353.353600=3885.37molm=583885.37=225.4kg(1)另解:气相传质单元数:又(3)若填料层增加3m,则:又 液气比一定,则:则:13解:(1)(2)Y1=0.073 Y2=0.0015X1=0.0196 X2=0Y1*=1.15X1=0.0225 Y2*=1.5X2=014解:(1)Y1=0.025 Y2=0.0045X1=0.008 X2=

5、0Y1*=1.5X1=0.012 Y2*=1.5X2=0(2)当时 第六章 精馏P244ex2.(1) (2) (3) (4)(5)精:进: (6) (8) 交点 (10) 第八章 化学反应工程基本原理P340(1)(2)或3 设n0=1,则nA0=0.1152设主反应消耗NH3的量为Z,副反应消耗NH3的量为F 5对于全混流反应器,第九章 均相反应器(1) (2)(4)(8)(15)200 Yuan, construction person in charge a fine of 50 Yuan. (8) no permit to work and the job in accordance

6、 with the provisions, on the job unit fined 300 yuan, the unit will charge a fine of 100 Yuan. 7.5.3 accident penalties (1) injuries fatalities directly punished 12 million. Direct responsibility for the accident and have the corresponding responsibility of leadership, such as concerning administrat

7、ive sanctions, should be brought to the company or the relevant Department. (2) personal injury accident occurred, the direct punishment 0.5-10,000 yuan, responsible for the direct responsibility for the accident and the responsibility of leadership, such as concerning administrative sanctions shoul

8、d be dealt with by the personnel Department of the company. (3) personal injury accident occurs, the direct punishment 500-1000, who is directly responsible for the accident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to conceal the accident, reported wit

9、hout undue delay or false, to inform the administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries

10、accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature29

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