{"id":17832,"date":"2018-05-08T17:14:57","date_gmt":"2018-05-08T17:14:57","guid":{"rendered":"http:\/\/sitepourvtc.com\/?page_id=17832"},"modified":"2022-11-16T12:31:33","modified_gmt":"2022-11-16T12:31:33","slug":"pressure-loss-coefficient-plc","status":"publish","type":"page","link":"https:\/\/sitepourvtc.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/head-loss\/pressure-loss-coefficient-plc\/","title":{"rendered":"Pressure Loss Coefficient – PLC"},"content":{"rendered":"
Any piping system contains different technological elements in the industry, such as bends, fittings, valves, or heated channels<\/strong>. These additional components add to the overall head loss<\/strong> of the system. Such losses are generally termed minor losses<\/strong>, although they often account for a major portion of the head loss<\/a>. For relatively short pipe systems, with a relatively large number of bends and fittings, minor losses can easily exceed major losses<\/a><\/strong> (especially with a partially closed valve that can cause a greater pressure loss than a long pipe when a valve is closed or nearly closed, the minor loss is infinite).<\/p>\n The minor losses are commonly measured experimentally. The data, especially for valves, are somewhat dependent upon the particular manufacturer\u2019s design.<\/p>\n Like pipe friction, the minor losses are roughly proportional to the square of the flow rate,<\/strong> and therefore they can be easily integrated into the Darcy-Weisbach equation<\/a><\/strong>. K<\/strong> is the sum of all of the loss coefficients in the length of pipe, each contributing to the overall head loss.<\/p>\n There are several methods<\/strong> how to calculate head loss from fittings, bends, and elbows. In the following section, these methods are summarized from the simplest to the most sophisticated. Sometimes, engineers use the pressure loss coefficient<\/strong>, PLC<\/strong>. It is noted K or \u03be \u00a0(pronounced \u201cxi\u201d). This coefficient characterizes pressure loss of a certain hydraulic system or a part of a hydraulic system. It can be easily measured in hydraulic loops. The pressure loss coefficient can be defined or measured for both straight pipes and especially for local (minor) losses<\/strong>.<\/p>\n <\/a><\/p><\/div><\/div> There are the following methods:<\/p>\n As can be seen from the picture, the head loss is forming key characteristic<\/strong> of any hydraulic system. In systems in which some certain flowrate must be maintained (e.g.,, to provide sufficient cooling or heat transfer from a reactor core<\/a>), the equilibrium<\/strong> of the head loss<\/strong> and the\u00a0head added<\/strong> by a pump determine the flow rate through the system.<\/p>\nPressure Loss Coefficient – PLC<\/h2>\n<\/p>
Summary:<\/h2>\n
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Why is head loss very important?<\/h2>\n