Re: energy requirement

From: <praveen>
Date: Wed Feb 28 2007 - 00:14:00 EST

thanks mr. segunodukoya, for confirmation, actually, i am working in a shot blasting equipment manufacturing componey, this problem was related to a air leak test fixture which was manufactured first time by us to test leakage of locomtive cylinder,water is to heat 80 degree and in this hot water a pressurised cylinder is dipped to test leakage in it.

   my work is not core pipe designing, i join the group because,i want to join some pipe design compney by learning from your correspondance and also you are engineer so you can help me to some extent in my field.

   thanks once again

segun odukoya <segunodukoya@yahoo.com> wrote:

           Rao,
since the question says they want the water heated to the desired temperature (80 degree) within one hour, the appropriate solution I think is to divide 95550 by 3600 and arrive at an answer (26.54 KW)

You can now advise the the company accordingly.

Thanks
Segun O
--- praveen purohit <prvapubo@yahoo.co.in> wrote:

> i found my self solution of my questio energy
> requirement is as under:
>
> 350 x 65 x1 = 22750 Kcal=22750 x 4.2 = 95550
> kjoule
> we are giving 6 kj energy per second thus time
> taken
> 95550/6=15924hr=4.42Hr,heater will be choose
> accordingly.this is general approximation and donot
> include heat and mass transfer cumborsome
> calculation. i wonder no body reply me?
> n purohit <prvapubo@yahoo.co.in> wrote:
> Mr. Rao,
> please check my calculation and correct me if you
> find any scope:
>
> Question: to raise the temperature of 350 liters
> water from 15 degree centigrate to 80degrere at
> atmospheric pressure my compney used two electric
> immersion water heater of 3 kw and claiming that it
> will heat the water to desire temperature with in
> one hour, i think they are wrong. my calculation is
> as under:
>
> 350 liters = .350 meter cube
>
> weight of water = .350 x 1000 = 350kg
>
> heat require = mst= 350x1x65=22750 jule
>
> heaters are giving 6000 jule per second
>
> heaters are of less capacity. kindly suggest the
> correct specification. because I am thinking that at
> least two number of heater of 11Kw should be used.
>
> Dacharaju Krishnamohan Rao <dk_rao@qp.com.qa> wrote:
> Mr Imran,
>
> visit
> "http://www.engdyn.com/pulsation/pipingfld.htm"
> which provides
> some published papers on the subject.
>
> regards,
> D.K.M.Rao.
>
> "Farhad" <farhad_ss@yahoo.com>
> Sent by: <a href="/group/PipingDesign/post?postID=w90TpDzfsgEdjS3m6Msy9tfBvJx6D6pnnWCIc2utEtdAb6ZR-JhfEizpMLoZgv58d90kG9i7iAINJCWMskJBkCZq8g">PipingDesign@yahoogroups.com</a>
> 02/12/2007 03:15 PM
> Please respond to
> <a href="/group/PipingDesign/post?postID=w90TpDzfsgEdjS3m6Msy9tfBvJx6D6pnnWCIc2utEtdAb6ZR-JhfEizpMLoZgv58d90kG9i7iAINJCWMskJBkCZq8g">PipingDesign@yahoogroups.com</a>
>
> To
> <a href="/group/PipingDesign/post?postID=w90TpDzfsgEdjS3m6Msy9tfBvJx6D6pnnWCIc2utEtdAb6ZR-JhfEizpMLoZgv58d90kG9i7iAINJCWMskJBkCZq8g">PipingDesign@yahoogroups.com</a>
> cc
>
> Subject
> [PipingDesign] Vibration
>
> Dear Imran,
>
> Definitely, you should use CAESAR II software to
> solve this problem.
> There are a few steps as follows:
>
> 1- Collect field data (displacements, RPM of pumps,
> pipe support
> configuration, etc.)
> 2- Model piping system in CAESAR II.
> 3- Run static analysis.
> 4- perform Harmonic analysis and enter harmonic
> displacement at pump-
> pipe node.
> 5- Tweak some dynamic parameters to model exact
> problem.
> 6- Add some stiffness (pipe support) to your piping
> system, wherever
> possible.
> 7- Run static then dynamic analysis to see changes.
>
> I hope it helps you.
>
> Regards,
> Farhad
>
> --- In PipingDesign@yahoogroups.com, "Imran M Ahmed"
> <imahmed@...>
> wrote:
> >
> > Hello Guys!
> >
> >
> >
> > We are facing vibration problem in the piping
> system of our plant.
> The
> > scenario is that the lean Amine pumps operate with
> a vibration of
> approx
> > 6 mm/sec pk on DE and 3.8 mm/sec pk on NDE. The
> vibration gets
> > transmitted through the piping into the standby
> pump which is not
> in
> > operation. The vibration recorded on the standby
> pump is
> approximately
> > 3.0 mm/sec pk. Do you have suggestion how to
> control this
> vibration?
> >
> >
> >
> > Regards,
> >
> >
> >
> > Imran Ahmed
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been
> removed]
> >
>
>

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[Non-text portions of this message have been removed] Received on Wed Feb 28 00:14:00 2007