Hello and good day to you,
I have a question about the harmonic force or displacement being used in an analysis and sorry for this being so basic question, but how is it determined if really things are quite hazy about the real source of vibration in the pipe, i.e. 2 phase or slug flow maybe...
hi,
I wanted to know please in comparison, when comparing 2 electrical fixed speed motors, of same power & rpm , but different voltages.
in other words, is it more efficient to have a motor rated at 3300 volts via transformer from the 11000 volts feeder, or to have a 11kv motor directly ?
i...
hello,
I want to know where each figure recorded from the LCD panel of the power feeder of an AC motor driving a machinery goes.
in other words, I have the reading at one instance reads in the panel at electrical room:
KW = 700
KVAr = 800
AMP = 70
and this is on a 11KV feeder.
so what is...
Hi,
I wanted to ask about the weight used in the report in different loading scenarios, for example in the report shell thickness under (operating, hot & new, wind, bottom seam), tw which is due to weight they used a weight of 57,011.8 kg , while the shell weight only as a component is only...
Hello,
I hope everyone is doing fine, at first I would like to apologize for not replying on my last post a few months ago, as it seems there was a technical issue at my end preventing me from receiving the notification emails !!! and special thanks for the extremely useful replied.
now for...
Hello,
The actual case is that some LPGs are being pumped through long pipelines running above ground mostly, and has some buried sections under roads, runs like that for about 20 kilometers, so the majority of the pipelines are exposed, its been there for many years and being well maintained...
hello everyone,
Again, as part of my job every while I get an annoying task to fulfill, here I was asked to see if the report submitted by the contractor regarding high vibration in an axis at one support is acceptable.
Issue in few words: a reciprocating propane compressor was installed as...
hi,
We do have a very old piston air compressor double (2 cylinders) of capacity 800 Nm3/hr , and for modernization and due to issues with availability of cooling water for this compressor, we were exploring the possibility of replacing it with a new oil-free screw type air compressor of the...
Hello ,
I was asked by my supervisors to find out the efficiency (I believe they mean the thermal efficiency) of a newly installed gas turbine in our plant, as they want to compare against the old one and against the datasheets supplied, and as I used to like thermo and power plants subjects...
Hi ,
My question is about a 16 inch flare line, on which a branch was taken for cold venting in case the flare is out, this branch was added about 20 years ago, and its a 12 inch branch, the venting is said to be (55000 Kg / hr) of gas (density 1.1 kg/m3) , and an old man did a simple...
hello,
I just had a non-seal centrifugal pump replaced with newer one as the old pump was obsolete after almost 20 years of service, its used in a high temperature application and the new pump is almost 100% exactly the same specs of the old pump, just the new model from the manufacturer with...
Hello everybody,
At first kindly refer to this topic for earlier discussions as I was seeking help to calculate the heat transfer from the tank of a cooling system we want to enhance http://www.eng-tips.com/viewthread.cfm?qid=411608
Further to this (kindly refer to attachment), looking at the...
Hello,
It is desired to cool down the water of a tank using a chiller (simply an air conditioning unit which evap is placed in the water, a common practice over here) this water is used to cool down compressed air from a compressor, so I understand that BTUs required for initial cooling down...
hello,
I posted this earlier in another forum and one helpful member there gave me some good answers however I still seek more please ...
We are facing a problem with a vent at our plant, and it was agreed by all parties that it needs to be re-routed to a further point.
The vent pot is 12...
Hi everybody, its my first post in the forum,
We are facing a problem with a vent at our plant, and it was agreed by all parties that it needs to be re-routed to a further point.
The vent pot is 12 meters high, small in size and weighs about 60 Kgs, and in order to maintain the vent and due...
