Trains.com

General BTU chart

2427 views
6 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    July 2004
  • 785 posts
Posted by Leon Silverman on Wednesday, February 8, 2006 6:23 AM
The steam table I used was from an E.I.T (Engineer In Training) review manual. However, Steam tables are standardized, so all references listed here will have the same tables, along with any college textbook on Thermodynamics.
  • Member since
    December 2001
  • From: US
  • 1,475 posts
Posted by overall on Saturday, February 4, 2006 3:02 PM
Some books you might want to check into on this subject;

"Steam, It's Generation and Use" published by Babcock and Wilcox.

"Mark's Standard Handbook for Mechanical Engineers" published by Magraw Hill.

"Shaum's Outline on Thermodynamics"published by Magraw Hill too I think.

George
  • Member since
    July 2004
  • 785 posts
Posted by Leon Silverman on Thursday, January 12, 2006 3:47 PM
To answer BR601013's question completely, Tim Burton's answer takes you only up to the boiling point of water. It then takes 970 BTUs to vaporize a pound of water. It will then require 42.4 BTU's to raise that water vapor to 300 degrees Farenheit at atmospheric pressure. Add in pressurization, and these figures can change. e.g.
Your fifteen pound pressure cap on your car's radiator takes thte boiling point from 212 to 250 degrees, where the vaporization heat is only 945.5 BTUs. . This is why enigineers require heat tables.
  • Member since
    April 2005
  • From: Phoenix, AZ
  • 81 posts
Posted by Tim Burton on Monday, January 9, 2006 10:34 PM
BTU: A unit used to measure quantity of heat, defined as the quantity of energy necessary to raise the temperature of 1 lb. of water 1° Fahrenheit.
http://www.federalist.com
  • Member since
    January 2001
  • From: Guelph, Ont.
  • 1,476 posts
Posted by BR60103 on Sunday, January 8, 2006 10:18 PM
For those of us well out of school, can someone relate the BTUs to the process of raising a gallon (or whatever) of water to and past the boiling point?

--David

  • Member since
    February 2005
  • 2,366 posts
Posted by timz on Sunday, January 8, 2006 6:37 PM
'"Corn" is 9000 BTUs per pound?
  • Member since
    April 2005
  • From: Phoenix, AZ
  • 81 posts
General BTU chart
Posted by Tim Burton on Sunday, January 8, 2006 1:20 AM
http://www.harmanstoves.com/btu.asp

I thought this would be interesting with regards to Coal and Wood for all you steam fans.
http://www.federalist.com

SUBSCRIBER & MEMBER LOGIN

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

FREE NEWSLETTER SIGNUP

Get the Classic Trains twice-monthly newsletter