OnlineConversion Forums Welcome to OnlineConversion.com Forums

Go Back   OnlineConversion Forums > Main Forums > Convert and Calculate

Convert and Calculate Post any conversion related questions and discussions here. If you're having trouble converting something, this is where you should post.
* Guest Posting is allowed.

Reply
 
Thread Tools Display Modes
  #1  
Old 09-22-2009, 12:18 PM
bikebahn
Guest
 
Posts: n/a
Default Convert Kgs/Hr to KW/Hr

I need to convert 357Kgs/hr to Kw or Kw/Hr

Thanks
BB
Reply With Quote
  #2  
Old 09-22-2009, 01:08 PM
JohnS JohnS is offline
Moderator
Long Time Member The Golden Calculator Award Over 5000 Posts
 
Join Date: Dec 2007
Location: SE Michigan, USA
Posts: 9,547
Rep Power: 19
JohnS will become famous soon enough
Default Re: Convert Kgs/Hr to KW/Hr

Quote:
Originally Posted by bikebahn View Post
I need to convert 357Kgs/hr to Kw or Kw/Hr

Thanks
BB
You would have to know what the material is and its heat of combustion.
Reply With Quote
  #3  
Old 09-22-2009, 02:02 PM
bikebahn
Guest
 
Posts: n/a
Default Re: Convert Kgs/Hr to KW/Hr

I have a steam heater of 357 kg/hr and i need to convert that into electrical heater so i need to know how much heater rating will be reqd.

Thanks
BB
Reply With Quote
  #4  
Old 09-22-2009, 02:26 PM
JohnS JohnS is offline
Moderator
Long Time Member The Golden Calculator Award Over 5000 Posts
 
Join Date: Dec 2007
Location: SE Michigan, USA
Posts: 9,547
Rep Power: 19
JohnS will become famous soon enough
Default Re: Convert Kgs/Hr to KW/Hr

Quote:
Originally Posted by bikebahn View Post
I have a steam heater of 357 kg/hr and i need to convert that into electrical heater so i need to know how much heater rating will be reqd.

Thanks
BB
If it is saturated steam, you have to know the temperature and or pressure out of the boiler. You also have to know the temperature on the return side. Then consult a steam table. You need to know the enthalpy difference between the two conditions, multiplied by the mass flow.
Reply With Quote
  #5  
Old 09-22-2009, 03:40 PM
bikebahn
Guest
 
Posts: n/a
Default Re: Convert Kgs/Hr to KW/Hr

Thanks John,

I'll let you know as and when I get more info about the parameters you mentioned.

BB
Reply With Quote
  #6  
Old 09-23-2009, 05:19 AM
JohnS JohnS is offline
Moderator
Long Time Member The Golden Calculator Award Over 5000 Posts
 
Join Date: Dec 2007
Location: SE Michigan, USA
Posts: 9,547
Rep Power: 19
JohnS will become famous soon enough
Default Re: Convert Kgs/Hr to KW/Hr

Let me say that this is enough steam that it should be evaluated professionally, by a heating engineer. (I'm not!!). A lot of heat is wasted in the steam distribution system, so installing the same electric capacity on a distributed basis may lead to excess capacity.

With that caveat, let me rough out some "order of magnitude" numbers for you. First, here is a steam table for you:
http://www.engineeringtoolbox.com/sa...ies-d_101.html

I will round your mass flow to 360 kg/h, which is 0.1 kg/s.
Heat transfer will be different in one-pipe and two-pipe systems, and depend on steam pressure or temperature. For a one pipe system, only the heat of vaporization is transferred, and pressure is generally only slightly above atmospheric. If we say 110 kPa (102.3 C), the heat content would be 2250 kJ/kg. At 0.1 kg/s, this is
2250 kJ/kg x 0.1 kg/s = 225 kJ/s = 225 kW
(fuel usage would be somewhat higher, with heat going up the chimney)

In a two-pipe system with cooler condensate, this might be a little higher, around 245 kW being transferred.

These are crude estimates of the current situation and NOT an estimate of the electrical heating capacity required. Depending on details, which can only be evaluated onsite by a qualified engineer, I would expect a somewhat lower estimate of electric heat capacity required.
Reply With Quote
  #7  
Old 08-23-2011, 12:11 AM
Waheed Bhatti
Guest
 
Posts: n/a
Default Re: Convert Kgs/Hr to KW/Hr

Dear, You can convert from Kgs/Hr to KW by using below fomula.

KW = Kgs/Hr(output-input)/3600

* Output= Entholpy of steam at given Pressure
Input = Entholpy of Feed water

Waheed
Reply With Quote
  #8  
Old 06-28-2012, 09:02 PM
Unregistered
Guest
 
Posts: n/a
Question Re: Convert saturated steam Kgs/Hr to KW/Hr

i have to need 1 kg saturated steam=how much kwh?
prasenjit
Reply With Quote
  #9  
Old 10-14-2013, 10:27 AM
Unregistered
Guest
 
Posts: n/a
Default Re: Convert Kgs/Hr to KW

i need 25kgs/hr of steam.for this how many kw i have to apply?
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 09:40 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 1997-2005, 2007, OnlineConversion.com