关于EDR7.2设计热虹吸换热器的一个警告
本帖最后由 superduckly 于 2015-11-26 13:18 编辑各位好,在运行EDR设计釜式热虹吸再沸器过程中,遇到了这样一个问题:
the thermosiphon calculation with the specified flow leads to an inconsistency in pressure change around the circuit of -0.06678 bar. The driving head of liquid corresponds to 0.21356 bar. A negative inconsistency in pressure means that extra flow resistance would be required to achieve this flow, and that in reality the flow would be higher than that specified. The thermosiphon Stability Analysis should also be treated with caution when there is a pressure inconsistency around the thermosiphon loop.
有的朋友建议说是推动力不足,但我提高推动力(操作液位),-0.06678这个值会进一步减小,变为-0.3、-0.4这样,降低液位,该值会向0靠近,但过低,该值变为正数,报警仍然存在,是否说明该值为负数是表示推动力大于阻力?请大家帮我看看如何解决这个问题,谢谢
该警告编号为1601,results warning 1601 好资料,谢谢! 同楼上。
看一下文件再说。 我觉得这个是负值没有问题,算出的传热系数要比实际的小,设计有富裕,管程实际的流速要比设计流速高。正直则相反。我觉得这个安装高度是合适的! 隐身猪 发表于 2015-12-2 11:42
In a fixed flow thermosiphon calculation, there will in general be a pressure imbalance around the t ...
谢谢,后来查了帮助文件,这个警告是正常的,因为在这个模式下,aspen自己会把推动力和阻力补齐,实际设计只要动力大于阻力就可以忽略这个警告 你这个是校核模式,软件认为你的压力不平衡 你朋友说反了,这个不是推动力不足,而是阻力不足。A negative inconsistency in pressure means that extra flow resistance would be required to achieve this flow, and that in reality the flow would be higher than that specified. 这段翻译过来就是(大意)压力中的负值意味着为了满足平衡需要额外的流动阻力降,且实际中,流量应该比定义的值大些。
应该用计算模式。 学习学习,谢谢分享
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