closed head什么意思(电机)? the engineering contractor should ensure that all motors that drive pumps and are operated by automatic sequence control from the dcs (or subject to auto-start of stand-by) are capable of starting without a closed head.; 其实这句话的意思是, 要求承包商确认所有驱动那些通过dcs来自动启动或待机的泵的电机都应该能够满足"开泵启动?" 就是说泵出口阀打开状态(一般启动泵时要求是关泵启动或者叫憋泵,泵出口阀关闭,目的是防止电机启动电流过大造成电机烧坏)。 closed head就是discharge shut off的意思,without a closed head就是不需要关闭泵出口。 隐含的意思是电机应该有过载保护(run out protection)查看更多
RYield 反应器模拟? 回复 2# kooee block: reator model: ryield * warning specified yields have been normalized by a factor of (20.0364) to maintain an overall material balance. 麻烦指导下下一步怎么调呢?用的是component yield 输入的百分数。 总是物料不守恒呢查看更多