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Recent content by Suddo

  1. Suddo

    Power savings in a gas compressor

    @LiitleInch, sorry I went into the wrong links earlier. This was very helpful. Thank you.
  2. Suddo

    Power savings in a gas compressor

    @rotw and @zeusfaber, this statement is considering the fact that all things remaining same,if somehow I am able to reduce the pressure requirement of the process and hence there is a decrease in the discharge pressure requirement, there is scope of power savings. This was given as a general...
  3. Suddo

    Power savings in a gas compressor

    I was reading an article on compressors and came across the following statement : "A reduction in the delivery pressure by 1 bar in a compressor would reduce the power consumption by 6 – 10 %. What are the underlying calculations and/or the principle behind this result?
  4. Suddo

    Difference in Direct vs Indirect Efficiency

    This is regarding a fluidised bed coal fired heater (Cap. 10 Mkcal/hr), used to heat thermic fluid, for which I have calculated the following numbers. As we know, there are two methods to calculate the efficiency, the Direct method, and the Indirect method. The Calculated values come out as...
  5. Suddo

    Temperature measurement of mixed stream

    @LittleInch, Currently we are looking at the TTs way downstream. I was already working on the CFD plots idea, although was only using google images to illustrate the point. A TT at more than 40D, ( It's inserted horizontally on the pipe side, and that too at an angle to the flow, don't know...
  6. Suddo

    Temperature measurement of mixed stream

    @TicL4, thanks for this input. Do these flowmeters work with an insulation too? Insulation thickness is around 150mm.
  7. Suddo

    Temperature measurement of mixed stream

    @rotw, this is what I am trying to do now, estimating Q_loss while taking the farthest temperature point. @LittleInch, yes, the absence of flowmeters renders this method useless. We have the individual temperatures though. Thanks for the suggestions.
  8. Suddo

    Temperature measurement of mixed stream

    @ hacksaw, I know that, but we cannot change the process without a plant shutdown and the analysis has to be done now. @rotw, as I stated above, we want to calculate the heat load across the heater to calculate the efficiency. 100 metres down the line would be stable but then it would include...
  9. Suddo

    Temperature measurement of mixed stream

    @georgeverghese, on interchanging the two TTs, the high one begins showing low reading, while the low one shows high. So I guess you are suggesting a poor mixing issue. In that case, please let me know how to calculate the optimum distance of the TT from the mixing point so I do not lose on the...
  10. Suddo

    Temperature measurement of mixed stream

    @rotw, yes they are in the same phase, that's for sure. (Liquid phase) The density difference I'm talking about is the property of the oil at different temperatures (supplied by the manufacturer's lab). And the temperature difference is due to the difference in heating provided by the radiant...
  11. Suddo

    Temperature measurement of mixed stream

    @LittleInch, thanks a lot for these suggestions. I just want to ask something for clarification. What is the basis of the number 80D (the distance of TT from the point of mixing) to be used. Is there some empirical correlation for a given flowrate, reynold's number etc. to be calculated? Or is...
  12. Suddo

    Temperature measurement of mixed stream

    Thanks a lot for responding @littleInch Yes, its a simple Tee in a pipe. The pipe diameters are all same, hence I assume flowrates would also be similar. Its a system where a pipe line splits into two, goes into two different sections of the heater (radiant and convective), and then come out and...
  13. Suddo

    Temperature measurement of mixed stream

    I am currently working on a process where two streams of the same liquid at different temperatures are mixed. There is a temperature indicator at the outlet of the mixing position, however, it shows erranous readings. It is suspected that this is because the two streams have not mixed properly...
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