PMC 32 : Normal Case(正常状况)

作者: 一方特 | 来源:发表于2020-03-05 13:09 被阅读0次
    安家,安心,安全。

    Normal case, 作为人体,就是正常状况。

    我们如何理解海外项目的正常工况?举个例子,人的正常工况是什么?就是你平时大多数的情况。比如:

    体重,体温,身高,气色,食欲,穿戴,心情等。

    这些基本状况不打变化,说明是一个正常状况,也就是人体的正常工况。变了,就是特殊状况,小的增加较少穿戴,大的情绪不好,严重的就是生病,紧急状况就是急诊或突发事件等。

    项目或装置或工厂有周期性,20年?30年?因为设备等要老化,有折旧。人体,也一样,有童年,少年,青年,中年,老晚。每个阶段是相对稳定的,有自己的正常状况,每升级一个阶段,就有所不同,开始是向上,平稳,之后就走下坡路。

    Normal case, 在工程上,就是正常工况。

    For an example to clarify the design cases related.

    Generally, PFD and heat and material balance shall be provided based on plant normal capacity. We believe that PFD and material balance shall be updated based on this comment but no rework is required for other PDP documents since documents which are related to flow ratesuch as rotary equipment (Pump and compressor), flow instrument, control valve data sheets shall be completed with min./normal/ maximum flow rate.

    Minimum/ normal/ maximum flow rate of each equipment/ instrument corresponds to feed minimum flow (25 MMSCFD)/ normal flow (58.3 MMSCFD)/ design flow (66 MMSCFD) respectively.

    Some data sheets of the aforementioned equipment/ instrument submitted in PDP are attached, Minimum/ normal/ maximum flow rate are included in these data sheets which shall be filled in.

    To make a long story short, It can be acceptable to keep PFD and material balance sheet based on maximum flow rate if CRYOSYS insists on.

    But, since it is not normal, a note shall be added in PFD and material balance : “All flow rates are reported based on maximum plant capacity (66 MMSCFD for total feed flow rate)”.

    【翻译】

    举个例子,关于澄清设计工况的表达。

    一般情况下,PFD和热和物料平衡应根据工厂正常产能提供。我们相信PFD和物质平衡应当更新在此基础上发表评论,但不需要返工其他PDP文件相关的文件流ratesuch以来回转设备(泵和压缩机)、流量计、调节阀数据表应完成分钟/普通/最大流量。

    各设备/仪表的最小/正常/最大流量分别对应于进料最小流量(25 MMSCFD)/正常流量(58.3 MMSCFD)/设计流量(66 MMSCFD)。

    附件是PDP中提供的上述设备/仪器的一些数据表,这些数据表中包含了最小/正常/最大流量,需要填写。

    长话短说,如果PDP方坚持按照最大流量来保持PFD和物料平衡表是可以接受的。

    但是,由于这是不正常的,在PFD和物料平衡中应添加一个说明:“所有的流量都是根据工厂最大容量(66 MMSCFD为总进料流量)报告的”。

    @Please check those words in a dictionary to make sure the exect meanings in engineering.

    CAPACITY

    NORMAL CASE

    MIN CASE

    MAX CASE

    DESIGN CASE

    EMERGENT CASE

    @Foreign case idea is below,

    Normal case: 100%

    Min:60%

    Max:110%

    Worse case:120%

    Emergent case:detector on specific data, may T,P,F,and content,& etc.

    @Chinese way is as follows,

    一位法国朋友:设计理念的偏差来自教育和文化。

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