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 01-05-2007, 12:25 PM
Unregistered
Guest
 
Posts: n/a
Default propane to btu

150 scfh to btu
Reply With Quote
  #2  
Old 01-05-2007, 01:26 PM
Robert Fogt's Avatar
Robert Fogt Robert Fogt is offline
Administrator
The Golden Calculator Award Over 1000 Posts
 
Join Date: Dec 2005
Location: Seattle, WA
Posts: 3,467
Rep Power: 13
Robert Fogt is on a distinguished road
Default Re: propane to btu

Those are both different types of units. Can you provide more information as to what you are trying to do?
Reply With Quote
  #3  
Old 07-23-2007, 12:49 PM
Unregistered
Guest
 
Posts: n/a
Default Re: propane to btu

Quote:
Originally Posted by Robert Fogt
Those are both different types of units. Can you provide more information as to what you are trying to do?
how much propane will a turkey fryer use per hour?
Reply With Quote
  #4  
Old 07-23-2007, 02:12 PM
Mrs X Mrs X is offline
can't count, can't spell!
Long Time Member The Golden Calculator Award The Tree House Award Over 1000 Posts
 
Join Date: Feb 2006
Location: New Zealand
Posts: 2,436
Rep Power: 12
Mrs X will become famous soon enough
Default Re: propane to btu

Here is a very useful site about propane:



http://www.propane.ca/Resources/propane.asp
Reply With Quote
  #5  
Old 01-17-2008, 03:43 PM
Unregistered
Guest
 
Posts: n/a
Default Re: propane to btu

Quote:
Originally Posted by Robert Fogt
Those are both different types of units. Can you provide more information as to what you are trying to do?
how many btu's are provided by one gallon of propane
Reply With Quote
  #6  
Old 01-30-2008, 08:15 PM
Unregistered
Guest
 
Posts: n/a
Default Re: propane to btu

If I have a tiki torch that burns 18585 BTU's per hour, how do I convert that to gallons per hour?
Reply With Quote
  #7  
Old 10-31-2008, 05:37 AM
Unregistered
Guest
 
Posts: n/a
Default Re: propane to btu

Propane is usually measured in pounds. You get 21622 btu per pound.
So a 20 pound bottle will net you 432440 btu. So just find out what the
usage of your product is and the amount of your supply.

Hope this helps.
Reply With Quote
  #8  
Old 11-29-2008, 08:19 AM
Don-fixit
Guest
 
Posts: n/a
Default Re: propane to btu

Back to the original question,
According to my chart on approximate properties of LP-gas (commercial propane)

1 gal. of liquid propane at 60 degrees F weighs 4.20 lb.

The latent heat needed of vaporization is 184 Btu / lb or 773 Btu / gal.
That is how much heat the tank will absorb to convert the liquid to a vapor. This is ignored if the tank is outside and the heat comes from the outside air. Only if the tank is heated by the propane like if the tank is inside and you are using a space heater in the garage is it a factor. Then it is only 0.8 percent.

The total heat after vaporization:
1 standard cubic foot vapor has 2,488 Btu (0 psig or at atmospheric pressure)
1 lb has 21,548 Btu
1 gal has 91,502 Btu
A 20lb gas grill tank filled to 18lb like most of them are holds 18lb/4.2lb per gal=4.28gal.

scfh stands for standard cubic feet per hour

So, 150 scfh (propane) would be 150scfh*2,844Btu/cf=426,600 Btu/hour.

So your turkey roaster would use up to 426,600 Btu/hour or 426,600Btu/hour dived by 91,502 Btu/gal would be 4.66gal/hr.

That's a BIG turkey roaster. Mine has a max. output of 150,000Btu/hour and that is with it turned all the way up.

Don
Reply With Quote
  #9  
Old 02-23-2009, 07:45 AM
randman07
Guest
 
Posts: n/a
Lightbulb Re: propane to btu

I using the above to make sure my assumptions are correct.

I took the amount 21622 btu per a pound and calculated that at 18 pounds in a 20lb gas grill tank. An my heater on low will burn 6000 btu I assume per an hour. Then 21622 x 18 = 389196.
and 389196 / 6000 = 64.866.
So my assumption is that the heater will run for 64.866 hours on the
6000 but setting.
I this right?
I plan to get another backup tank and if the heat ever goes out I can survive for a while.
Reply With Quote
  #10  
Old 04-07-2009, 11:44 AM
Snowden
Guest
 
Posts: n/a
Default Re: propane to btu

how many BTUs are in a cubic ft of LP gas? If a pilot light uses 1200 BTUs an hour, how many cubic ft of propane will it use in a month? I'm trying to calculate the cost of having a propane gas fireplace in Florida when we will only use the pilot for 8 months and the fireplace maybe 20 hours a month in the remaining four months as a decoration, not for heat.
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 06:07 PM.


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