Hello Ahmed,
Thank you so much for the confirmation.
Onil
- Ahmed Vawda <avawda@aksugar.co.ae> wrote:
> Hi Onil,
>
> Yes, your equations are correct. The velocity will
> be the average velocity
> over the cross-sectional area, as confirmed by other
> forum members.
> However, I cant recall coming across steam
> velocities reported in m/hr.
> They are usually reported in m/sec or ft/sec.
> For example for superheated steam, I design on 40 -
> 75 m/s.
> If you use m/hr it would be 144,000 m/hr - 270,000
> m/hr.
> Both are the same, but the m/sec is generally the
> dimension I have see in
> the literature since my university days.
>
> Ahmed Vawda
> Process Engineer
> Al Khaleej Sugar - Dubai
>
> -----Original Message-----
> From: nilo aninon [mailto:onil8001@yahoo.com]
> Sent: Wednesday, September 19, 2001 5:42 PM
> To: pipingdesign@yahoogroups.com
> Subject: [PipingDesign] STEAM VELOCITY
>
>
> Hi everybody,
>
> To anybody who is very much knowlegeable about this
> subject matter, please share a piece of your
> knowledge.
>
> Is Q=A*V formula can be used in solving theoritical
> steam velocity? Say, I have already known the mass
> flow of steam in kg/hr. Then through the steam
> tables
> I can extract value for specific volume of steam in
> m3/kg. With the two data known, I think I can
> already
> solved for the velocity of steam using the above
> mentioned relation V=Q/A, where:
>
> Q=volumetric flow, m3/hr
> A=cross sectional area of pipe, m2
>
> Substituting the value,
> Q=mass flow of steam (kg/hr)*specific volume (m3/kg)
> Q=m3/hr
>
> Therefore,
> V=Q(m3/hr)/A(m2)
> V=m/hr
>
> I was quite confused because the result of my
> calculation is very far or too high compared with
> the
> data provided by some boiler accessories
> manufacturer.
>
> Hope to hear from the experts.
>
> Very truly yours,
>
> Onil
>
> __________________________________________________
> Terrorist Attacks on U.S. - How can you help?
> Donate cash, emergency relief information
>
http://dailynews.yahoo.com/fc/US/Emergency_Information/
>
>
> ___________________________________________________
> If you want only site update notifications, go here:
>
> mailto:PipingDesignNews-subscribe@yahoogroups.com
> _____________________
> Piping Design Central
> [ http://www.PipingDesign.com ]
> ________________________________________
> We hope you find this newsletter useful.
> If not, you can unsubscribe at:
> PipingDesign-unsubscribe@yahoogroups.com
> Post message: PipingDesign@yahoogroups.com
> Subscribe: PipingDesign-subscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
> [Non-text portions of this message have been
> removed]
>
>
Do You Yahoo!?
Listen to your Yahoo! Mail messages from any phone.
http://phone.yahoo.com
Received on Fri Sep 28 09:38:00 2001