模拟过程出现了温度交叉问题，怎么都解决不了
如题，模拟后出现了温度交叉问题，但是怎么修改都修改不了，而且还会出现一些新的问题，因为是新手，实在找不到解决办法了，求助大神帮忙解决。下面是模拟结果：<< Run reinitialized 14:44:29 Thu Nov 12, 2015>>
->Processing input specifications ...
Flowsheet Analysis :
Block $OLVER01 (Method: WEGSTEIN) has been defined to converge
streams: 1 2
COMPUTATION ORDER FOR THE FLOWSHEET:
$OLVER01 TUR CON PUMP EVP
(RETURN $OLVER01)
->Calculations begin ...
> Beginning Convergence Loop $OLVER01 Method: WEGSTEIN
Converging tear streams: 1 2
Block: TUR Model: COMPR
Block: CON Model: HEATX
**ERROR
TEMPERATURE CROSSOVER DETECTED
RE-CALCULATING WITH MINIMUM APPROACH TEMP. SPEC
Block: PUMP Model: PUMP
Block: EVP Model: HEATX
> Loop $OLVER01 Method: WEGSTEIN Iteration 1
Converging tear streams: 1 2
4 vars not converged, Max Err/Tol 0.10000E+07
Block: TUR Model: COMPR
Block: CON Model: HEATX
Block: PUMP Model: PUMP
Block: EVP Model: HEATX
**ERROR
TEMPERATURE CROSSOVER DETECTED
RE-CALCULATING WITH MINIMUM APPROACH TEMP. SPEC
> Loop $OLVER01 Method: WEGSTEIN Iteration 2
Converging tear streams: 1 2
2 vars not converged, Max Err/Tol 0.46243E+02
Block: TUR Model: COMPR
Block: CON Model: HEATX
Block: PUMP Model: PUMP
Block: EVP Model: HEATX
**ERROR
TEMPERATURE CROSSOVER DETECTED
RE-CALCULATING WITH MINIMUM APPROACH TEMP. SPEC
> Loop $OLVER01 Method: WEGSTEIN Iteration 3
Converging tear streams: 1 2
1 vars not converged, Max Err/Tol 0.75461E+01
Block: TUR Model: COMPR
Block: CON Model: HEATX
Block: PUMP Model: PUMP
Block: EVP Model: HEATX
**ERROR
TEMPERATURE CROSSOVER DETECTED
RE-CALCULATING WITH MINIMUM APPROACH TEMP. SPEC
> Loop $OLVER01 Method: WEGSTEIN Iteration 4
Converging tear streams: 1 2
1 vars not converged, Max Err/Tol-0.19812E+01
Block: TUR Model: COMPR
Block: CON Model: HEATX
Block: PUMP Model: PUMP
Block: EVP Model: HEATX
**ERROR
TEMPERATURE CROSSOVER DETECTED
RE-CALCULATING WITH MINIMUM APPROACH TEMP. SPEC
> Loop $OLVER01 Method: WEGSTEIN Iteration 5
Converging tear streams: 1 2
# Converged Max Err/Tol 0.00000E+00
->Generating block results ...
Block: EVP Model: HEATX
**ERROR WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "EVP" (MODEL:
"HEATX")
TEMPERATURE CROSSOVER DETECTED
RE-CALCULATING WITH MINIMUM APPROACH TEMP. SPEC
Block: CON Model: HEATX
Block: PUMP Model: PUMP
->Simulation calculations completed ...
***No Warnings were issued during Input Translation ***
***Summary of Simulation Errors***
Physical
Property System Simulation
Terminal Errors 0 0 0
Severe Errors 0 0 0
Errors 0 0 6
Warnings 0 0 0
->Generating results ...
<< Run Saved >>
->Generating results ...
<< Run Saved >>
->Generating results ...
<< Run Saved >>
把冷热流体反接一下试试 冷热物流随便哪个，增大流量，试试。
流量增大，换热量不变的情况下，温差自然减小，就更不易发生温度交叉。 温度上下界没设好 feel_young 发表于 2015-11-12 15:56
冷热物流随便哪个，增大流量，试试。
流量增大，换热量不变的情况下，温差自然减小，就更不易发生温度交 ...
还是不行，还有别的办法不，谢谢喽！ yzt811520 发表于 2015-11-12 16:11
温度上下界没设好
改了好多组数据，还是不行，而且会出现新的错误，不过还是谢谢你！ yzhsh90 发表于 2015-11-12 15:02
把冷热流体反接一下试试
反接了一下，出现了这种情况，应该是要设置撕裂物流，设置过之后还是出现这种情况，不会解决了，该怎么做呢？谢谢喽！
<< All Blocks Reinitialized >>
<< Run reinitialized 10:20:19 Fri Nov 13, 2015>>
->Processing input specifications ...
* WARNING IN THE "STREAM" PARAGRAPH WHICH BEGINS ON LINE 39
STREAM NAME: 1
COMP**NT MASS FLOWS OF SUBSTREAM: "MIXED"
ARE NORMALIZED TO THE TOTAL MASS FLOW VALUE.
Flowsheet Analysis :
Block $OLVER01 (Method: WEGSTEIN) has been defined to converge
streams: 1 4
COMPUTATION ORDER FOR THE FLOWSHEET:
$OLVER01 EVP TUR CON PUMP
(RETURN $OLVER01)
->Calculations begin ...
> Beginning Convergence Loop $OLVER01 Method: WEGSTEIN
Converging tear streams: 1 4
Block: EVP Model: HEATX
* WARNING
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
Block: TUR Model: COMPR
* WARNING
TOTAL FLOW IS ZERO. BLOCK IS BYPASSED.
Block: CON Model: HEATX
* WARNING
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
Block: PUMP Model: PUMP
* WARNING
MIXED SUBSTREAM HAS ZERO FLOW.BLOCK BYPASSED.
> Loop $OLVER01 Method: WEGSTEIN Iteration 1
Converging tear streams: 1 4
* WARNING
VALUE IS MISSING FOR VARIABLE 8.
THIS MAY BE CAUSED BY A ZERO-FLOW STREAM.
THE PREVIOUS VALUE OF THE VARIABLE WILL BE USED.
2 vars not converged, Max Err/Tol 0.10000E+07
Block: EVP Model: HEATX
* WARNING
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
Block: TUR Model: COMPR
* WARNING
TOTAL FLOW IS ZERO. BLOCK IS BYPASSED.
Block: CON Model: HEATX
* WARNING
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
Block: PUMP Model: PUMP
* WARNING
MIXED SUBSTREAM HAS ZERO FLOW.BLOCK BYPASSED.
> Loop $OLVER01 Method: WEGSTEIN Iteration 2
Converging tear streams: 1 4
# Converged Max Err/Tol 0.00000E+00
->Generating block results ...
Block: EVP Model: HEATX
* WARNING WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "EVP" (MODEL:
"HEATX")
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
Block: CON Model: HEATX
* WARNING WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "CON" (MODEL:
"HEATX")
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
->Simulation calculations completed ...
***Warning(s) were issued during Input Translation ***
***Check the Run Status Results for more Information ***
***Summary of Simulation Errors***
Physical
Property System Simulation
Terminal Errors 0 0 0
Severe Errors 0 0 0
Errors 0 0 0
Warnings 0 0 11
->Generating block results ...
Block: EVP Model: HEATX
* WARNING WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "EVP" (MODEL:
"HEATX")
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
Block: CON Model: HEATX
* WARNING WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "CON" (MODEL:
"HEATX")
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
* WARNING
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
* WARNING
AT LEAST ** FEED HAS ZERO FLOW
BLOCK BYPASSED
xiaohuangren 发表于 2015-11-13 10:20
反接了一下，出现了这种情况，应该是要设置撕裂物流，设置过之后还是出现这种情况，不会解决了，该怎么做 ...
你的这个版本太高了，我打不开 yzhsh90 发表于 2015-11-13 10:36
你的这个版本太高了，我打不开
我刚刚换了一个版本7.2版本的，你看一下。 xiaohuangren 发表于 2015-11-13 10:04
还是不行，还有别的办法不，谢谢喽！
你流程图截一张图我看看。 不知道你是设置的负荷还是冷热流体温度。主要思想都是要减小换热量。设的是负荷的话，减小负荷。设的是流体温度的话，减小进出口流体温差。 feel_young 发表于 2015-11-13 11:42
你流程图截一张图我看看。
麻烦你了！
xiaohuangren 发表于 2015-11-13 12:58
麻烦你了！
你这是制冷循环吗？还是什么。
压缩机升压，你的PUMP能降压吗？不应该用阀门降压？
我还真有点儿搞不懂了。 feel_young 发表于 2015-11-13 15:15
你这是制冷循环吗？还是什么。
压缩机升压，你的PUMP能降压吗？不应该用阀门降压？
这个是有机朗肯循环，其实也就是电厂循环，有蒸发器、冷凝器、透平和泵，工质用的是有机工质R245fa（C3H3F5，1,1,1,3,3-五氟丙烷），蒸发段用热水换热，冷凝段用冷水换热。热源（热水）进口95℃，出口90℃，流量11.98kg/s；冷源（冷却水）进口0℃，出口5℃，流量9.94kg/s。我想模拟出透平输出的功率，您能帮我模拟一下吗？真的找不到解决方法了，谢谢！ xiaohuangren 发表于 2015-11-13 18:27 static/image/common/back.gif
这个是有机朗肯循环，其实也就是电厂循环，有蒸发器、冷凝器、透平和泵，工质用的是有机工质R245fa（C3H3 ...
具体不太懂。如果只是shortcut设计模式的话。那么就无所谓换热面积和换热系数。
提醒几个事儿吧。
冷凝压力和蒸发压力设置是否合理？
冷凝温度和蒸发温度是否能保证一个是放热一个是吸热？
换热器冷热物流是否接错？一个是hot side，一个是cold side，这个一定要分清。
循环工质流量是否设置合理？
其实如果只是想设计计算的话，看宏观变化的话，很简单。和手算一个道理。
如果想校核计算的话，也就是换热器固定，透平和泵固定，那就得多研究研究了。比如我一直没解决的循环工质质量（kg）守恒的问题。
feel_young 发表于 2015-11-13 21:29
具体不太懂。如果只是shortcut设&# ...
嗯，我再试一下，很感谢！ xiaohuangren 发表于 2015-11-13 22:46 static/image/common/back.gif
嗯，我再试一下，很感谢！
嗯，有问题再说。
你这个流程真的不难。如果只是设计模式。
试试降低塔顶压力， 或者调节进料流量 谢谢各位帮忙，问题已解决。 xiaohuangren 发表于 2015-11-18 11:19
谢谢各位帮忙，问题已解决。
问题出在哪儿了？
怎么不总结一下发上来。{:1106_362:}
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