Alignment calculation formula of rotary machine in MS Excel

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Summit Power International https://summitpowerinternational.com/

This document discusses formulas for calculating alignment of rotary machines in Microsoft Excel across four cases. It presents alignment calculation methods for different rotary machine setups and configurations using Excel for analysis and determination of shaft alignment values.

Engineering

ALIGNMENT
CALCULATION
FORMULA
OF ROTARY MACHINE
IN MS EXCEL
Prepared by
Ashik Ahmed Rofy

Haripur Combined Cycle Power Plant have two cooling water pump (CWP-A/B) each 50% capacity. According to schedule maintenance plan each pump is overhauled after 16,000 running hours. The pump suction is from river water to discharge to water boxes of steam condenser. It’s a vertical shaft, 1350 discharge bore mixed flow pump. It’s driven by an 1100 KW vertically mounted motor with a rated full load rpm of 494. Rated flow rate of the pump is 18, 600 m3/hr. Before the overhauling CWP-A, NDE side vibration of motor as being monitored was too high for its sound performance. Vertical vibration data at NDE was measured as high as 6.3 mm/sec which was way alarming. Suspected regions were out-clearances of bearings and wear-rings. O & M came to a decision for complete overhauling of the pump which started on November 27, 2011 and was completed on December 01, 2011.

Steam turbine deaerating condenser perforamace improvement

Summit Power International https://summitpowerinternational.com/

I have attached this report where we find out the actual reason steam turbine Deaerating Condenser Performance degradation which was written on June 06, 2012.That time I was in Haripur Power Limited (HPL) ,A 360 MW CCPP of Pendekar Energy Bangladesh Ltd. The report outcome showed that the Steam turbine load could be reached to its maximum capacity after those valve maintenance works on the next Steam Turbine Major inspection on 2013.We hope we can increase our steam turbine load to 5-7 MW/D on that time. The operational guys were indicating Circulating water pumps (CWP A&B) were not performing to its design capacity & Ejectors/vacuum pumps are not performing well.So,Mechanical Maintenance Team (MMT) team find this successful outcome after several study. Condenser vacuum condition has improved a lot after maintenance of the valves on last Major Inspection on 2013. It is a sample report where we can realize that identifying actual reason for an equipment performance is not only a job of operational people but also a responsibility of the maintenance guys.

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