问题 问答题 简答题

切换式换热器某单元组因通遭损坏而被切除时,对温度工况有什么影响?

答案

参考答案:切换式换热器某个单元组因通道损坏而被切除时,就换热器来说,总的换热面积减少了,所能传递冷量的能力也相应减少。如果通过的空气量不变,则不能把空气冷却到原来设定的温度,冷端温差也将扩大,这不利于自清除,阻力会增加得很快。同时热端温差也会扩大,造成热端冷损失增加。因此,遇到这种情况,要适当减少加工空气量(氧、氮产品量也相应减少)。这样,如果切换式换热器两大组气量分配得合适,对温度工况的影响就不大了,可以维持正常运转。

阅读理解

阅读下面短文,按要求完成短文后的题目。

     Maybe Snoopy is the coolest dog in the world; maybe Snoopy is one of the greatest kids on two

legs. He is a happy-go-luck(逍遥自在的)dog everyone loves.

     Snoopy is the pet of Charlie Brown, whose name Snoopy could never remember. For Snoopy, his

master is just "that round-headed kid" who brings him his meals.

     Snoopy never speaks, but he can make himself understood by using facial expressions(面部表情)

and thought balloons(思想泡泡).

    ①In Snoopy's little head, he is everything but a dog. Since 1960s, Snoopy has been standing on two

legs instead of four and doing independent thinking. Here are two perfect examples to prove this point.

    Charlie once told Snoopy, "Look, Snoopy, that boy throws a branch, then his dog will run to pick it

and bring the branch back." Hearing this, Snoopy picked up a branch and threw it.

    At another time, Charlie read his newspaper to Snoopy, "It says that there will be a dog-show. Will

you think about it?" Snoopy thought, "How can I? I don't even have a dog!"

1、What does Snoopy think of his master?

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2、将①处译成汉语

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3、判断正(T)误(F)

( )We can understand Snoopy by his facial expressions and his speaking.

4、What do the two examples prove in the passage?

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5、Can Snoopy remember Charlie Brown, his master's name?

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