When to use a centrifugal or a Positive Displacement pump (PD) is not always a clear choice. To make a good choice between these pump types it is important to understand that the two types of pumps behave very differently. By looking at the performance chart below you can see just how different they are. The centrifugal has varying flow depending on pressure or head, whereas the PD pump has more or less constant flow regardless of pressure

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In recent years, everybody is dreaming about one cheaper & cleaner fuel ethanol. Though the cleanliness over its total life cycle is still a debatable point along with energy efficiency debates. I am considering few Nos which were presented in some othe blog for my visitors. In this we will see the total requirement & growth of Ethanol as fuel & as industry demand

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This blog was conceptualized to share the information for young process engineers who need guidance at each step in the early career of their professional life. Since May2007 I started active blogging. Now we had 100 Posts in 10 Months & 75 readers which is a very good growth specially when your focus area is so specific. I am not blogging for my own thoughts, day to day happening like my personal diary but this blog is meant for purely technical & useful learnings

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Normally a project passes through various phases e.g. basic engineering, detail engineering, equipment fabrication, erection, commissioning etc. The conceptual idea of business from the process development cell is converted to executable documents during basic engineering.

This is the step where we need P&ID or piping and Instrumentation diagram

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Common problem of carrying out calculation of optimum insulation thickness, Yet loosing lot of energy in the form of heat loss or cold loss, need re-work on insulation due to damage over a certain period of 2-3 years during annual turnaround etc. etc..............

Poor process engineers. Need survey of thickness, need good maintenance & monitoring program....lots of cost items..& still not satisifed.

After so many years of struggle, I thought about this Idea which is very cost effective & higher savings for lifetime. No need of re-work etc. No maintenance cost.

Interesting.........Ya....Very good business idea too....here is my input

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Process engineers need many calculations related to orifice design e.g. for

1. Restriction Orifice Dia.
2. Maximum possible flow through Restriction Orifice for a given dia.
3. Flow of gases through spargers with a given hole size & pipe Dia.
4. calculation of new size of holes for spargers.
5. Pressure drop across Orifice.

And many more..........SO I am attaching a very simple excel sheet for such calculations, which is not very complicated yet useful for almost 98-99% accuracy.

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Recently going through some blog articles, I found the use of low flush toilets where water can be saved by more than 50%. Amazed by numbers, I thought to work out my self these numbers with ref to India & possible quantum of savings.

Therefore, my search began on this issue & found that technologies are available which can reduce the consumption to more than 80-90% and is totally developed indeginously by Indians. We do not realize the importance of any small change unless we see its impact in totality which may be very useful for the nation as a whole

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