课件 marine automation(轮机自动化） Task1 Cooling water temperature control system chapter3-1 cooling water temperature control system.pptVIP

下载本文档

13
0
约3.48万字
约 97页
2020-12-13 发布于北京
举报
版权申诉

课件 marine automation(轮机自动化） Task1 Cooling water temperature control system chapter3-1 cooling water temperature control system.ppt

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

A differential pressure transmitter shown below provides an analogue of viscosity to a pneumatic controller, which regulates the supply of fuel heating steam through a control valve. A differential pressure transmitter shown below provides an analogue of viscosity to a pneumatic controller, which regulates the supply of fuel heating steam through a control valve. A differential pressure transmitter shown below provides an analogue of viscosity to a pneumatic controller, which regulates the supply of fuel heating steam through a control valve. A differential pressure transmitter shown below provides an analogue of viscosity to a pneumatic controller, which regulates the supply of fuel heating steam through a control valve. A differential pressure transmitter shown below provides an analogue of viscosity to a pneumatic controller, which regulates the supply of fuel heating steam through a control valve. A differential pressure transmitter shown below provides an analogue of viscosity to a pneumatic controller, which regulates the supply of fuel heating steam through a control valve. 3.2 boiler water level and ignition control system Three Element Boiler Water Level Control Three Element Boiler Feed Water Control The measured variables or elements are ‘steam flow’, ‘drum flow’ and ‘feed water flow’. Since in a balanced situation steam flow must equal feed flow, these two signals are compared in a differential relay. The relay output is fed to a two term controller and comparator into which the measured drum level signal is also fed. Any deviation between the desired and actual drum level and any deviation between feed and steam flow will result in controller action to adjust the feed water control valve. The drum level will then be returned to its correct position. 3.3 boiler water level and ignition control system Three Element Boiler Water Level Control A sudden increase in steam demand would result in a deviation signal from the differential relay and an outpu