Topic: 问D可能比较弱智的问题。。。。。。

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问D可能比较弱智的问题。。。。。。 Copy to clipboard
Posted by: 12345678
Posted on: 2002-12-02 16:08

:?)[$#23558]一[$#20010]水泵的出水口接到另一[$#20010]水泵的入水口，串[$#32852]起[$#26469]，流量，[$#25196]程是否等于[$#20004]台加起。
:?)[$#23558]一[$#20010]水泵的出水口和另一[$#20010]水泵的出水口，并[$#32852]起[$#26469]，一起谷到一[$#26465]水管，流量，[$#25196]程是否等于[$#20004]台加起。
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Posted by: iczfirz
Posted on: 2002-12-02 16:14

要搵物理佬先計到喎:D:D.. 但我估第一係要考慮個水喉既接駁位係點?
回覆： 问D可能比较弱智的问题。。。。。。 Copy to clipboard
Posted by: clownfish
Posted on: 2002-12-02 17:40

1~8 san ,
IQ question :D:D

assume 2 水泵 same .
:?) 1 , 流量 no
         be'coz second 水泵的入水 control by first 水泵的出水,
         so result should be similar to 1 水泵的出水量.
:?)2 流量 yes,

what is the definition of [$#25196]程 , any standard pipe size ??
for :?)2 if double pipe size , answer are no,
               if same pipe size no change , maybe answer are yes.

personal thinking only .
:D:D
      
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Posted by: 白熊
Posted on: 2002-12-02 19:37

1. 流量同揚程只會比一個泵多DD咁多.
2. 流量同揚程會接近兩個泵既效果.
以上全是直覺判斷, 即係純粹靠估:D:D:D
回覆： 问D可能比较弱智的问题。。。。。。 Copy to clipboard
Posted by: 12345678
Posted on: 2002-12-03 09:24

吾系IQ[$#38382][$#39064]啊:D
其[$#23454]是有[$#20004][$#20010]小泵多有[$#27809]¥[$#20080]大泵:(想用住先，不[$#36807]我估如果上水管管[$#24452]不[$#21464]的[$#35805]，用第2种方法流量增加不大，吾知系吾系:)
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Posted by: iczfirz
Posted on: 2002-12-03 09:53

第二個法.. 最好係分番開兩條水路上.. 唔係只怕是旦一個停左就會谷番轉頭囉..
回覆： 问D可能比较弱智的问题。。。。。。 Copy to clipboard
Posted by: clownfish
Posted on: 2002-12-04 09:34

i think you have to make clear what you want ....流量 ...[$#25196]程.. or both .....??
if 流量 no nedd to consider just as iczfirz san suggestion sepearte it,
sure you get double 流量 and safe.

12345678 wrote
上水管管[$#24452]不[$#21464]的[$#35805], 用第2种方法流量增加不大，吾知系吾系

if 上水管管[$#24452]不[$#21464]的[$#35805] , 流量 maybe 1.5 , but [$#25196]程 should increase .
if 上水管管[$#24452][$#21464]的[$#35805] , 流量 near to 2.0 but [$#25196]程 maybe not increase .

so , back to the question , what you want ..???
above just personal feeling .係純粹靠估 :D:D:D:D

ps : after you try , pls post out your testing result .
thank you :D:D
回覆： 问D可能比较弱智的问题。。。。。。 Copy to clipboard
Posted by: 12345678
Posted on: 2002-12-04 13:56

由于我的上水管已有，要改非常麻[$#28902]，所以只能上水管管[$#24452]不[$#21464]啦
我是想要加流量，可上水管比[$#36739]多[$#21306]位，可能[$#25196]程都要考[$#34385]啊。
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Posted by: iczfirz
Posted on: 2002-12-04 14:10

換一個大泵啦.. 錢洗左去就冇咁煩..:})
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Posted by: clownfish
Posted on: 2002-12-04 14:22

if like this , i would like to propose 并[$#32852] ,
but if anything wrong pls don't kill me :P:})
waiting your good result :D:D
回覆： 问D可能比较弱智的问题。。。。。。 Copy to clipboard
Posted by: fai
Posted on: 2003-02-04 19:21

Dear all,
If two identical pumps are connected in series, flow rate will remain unchange, but the pressure head will be doubled.
If two identical pumps are connected in parallel , flow rate will be doubled, but the pressure head will remain unchanged.
If three identical pumps are connected in series, flow rate will remain unchange, but pressure head will be tripled.
If three identical pumps are connected in parallel , flow rate will be tripled, but pressure head will remain unchanged,
And so on...
It is a pump law, always ture.

Hope this helps
Fai
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