TILI Automation

 Today in this article, we will learn about Eddy Current Loss which is widely used by Electrical as well as Instrumentation Engineers. Eddy Current Loss is one of the most important and interesting concepts. What is Eddy Current? When any magnetic material comes under the magnetic field generated by an alternating current, an emf is induced in the core material. The law which supports this statement is Faraday’s Law of Electromagnetic Induction. All magnetic materials have electrical conducting properties and the induced emf in the magnetic material causes the current to flow in the magnetic material in a specific direction. This current circulates within the magnetic material. The circulating current caused by Induced EMF is termed as Eddy Current. What is Eddy Current Loss? As Eddy current exists, heat loss will also definitely occur. The heat loss which is caused by the eddy currents in the magnetic material is termed as eddy current loss. Lenz’s law describes about the eddy cur...

 Note: This root cause analysis (RCA) is from real-time scenarios that happened in industries during the tenure of two or three decades ago. These articles will help you to improve your troubleshooting skills and knowledge. Choked Control Valve with Whisper Trim Cage Usually producing > 1600 T/d a Saudi 1500 T/d NH3 plant could not produce > 1450 T/d. The operations engineer called the author to resolve this problem. The author found 7% less than the setpoint flow even with 100% open flow control valve (FCV) suggested choked control valve (CV). The valve nameplate told whisper trim cage – cage with numerous 2-mm holes drilled – fitted CV. The NG carried over tarry matter choking the holes during the two years of > 1600T/d NH3 production is easy. Fortunately, this CV had rare block and bypass valves. The author asked the operation superintendent to transfer the NG flow control to the bypass valve, close the block valves, drain the control valve (CV) and hand it over to him ...

 Electrical engineering root cause analysis (RCA) related to considered not possible HT motors’ Direction of Rotation (DOR) changed. Note: This root cause analysis (RCA) is from real-time scenarios that happened in industries during the tenure of two or three decades ago. These articles will help you to improve your troubleshooting skills and knowledge. HT Motor Direction of Rotation (DOR) Why Direction of Rotation (DOR) arrows? Large motors’ come with backward-curved fans (below figure). They deliver max air-flows at marked Direction of Rotation (DOR) and very little in the opposite DOR. Consequently, the winding temperature could go a lot higher than permitted. It could shorten winding lives even lead to burnouts. This is especially serious, as most motors have no winding temperature indicators (at that time). Hence, DOR marks. However, one can change DOR to suit the driven machine thus: swap the left and right internal axial fans (IAF above-figure) Substitute the existing Extern...

 The Continuity Equation and the Bernoulli Equation are the basis for all types of differential pressure flow measurement (Explanation of these equations is not included in this article). 1. Square Root Relationship Since, Q ∝ √ΔP. Where, Q = Flow rate & ΔP = Differential pressure across the plate. Turndown of differential pressure smart transmitters available in the market can go up to 200:1. So, flow rangeability (ratio of maximum to minimum flow) can be 14:1. (Note: Rangeability of a sensor defines the measurement range over which the error statement, in the units of a percentage of actual reading is guaranteed.) However, the standard differential pressure transmitters available in the market with high repeatability and advanced features can generally go up to the turndown of 100:1. So, flow rangeability can be achievable up to 10:1. When flow rangeability required above 10:1, the use of two orifice plates of different capacities, two differential-pressure flow transmitters ...