BTU Analyzer
BTU Analyzer
(OP)
Hi Guys!!!
I'd like to measure the BTU value of a gas (81% Methane).
The purpose for that is to control the Air-Fuel ratio of our boilers.
I raed several papers that are about the WOBBE INDEX METER.
Does any one has experience with this kind of analyzer or any other kind that can help me?
Thanks in advance.
I'd like to measure the BTU value of a gas (81% Methane).
The purpose for that is to control the Air-Fuel ratio of our boilers.
I raed several papers that are about the WOBBE INDEX METER.
Does any one has experience with this kind of analyzer or any other kind that can help me?
Thanks in advance.





RE: BTU Analyzer
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There's an intriguing alternative from Cosa for commerical methane, an on-line chromatograph 'tuned' for commercially delivered methane. I'm not sure it would work at 81% methane or not, but I'm sure Cosa could tell you.
http://www
RE: BTU Analyzer
http://www.mobrey.com/products/density/3098.php
JMW
www.ViscoAnalyser.com
RE: BTU Analyzer
Enjoy your weekend.
RE: BTU Analyzer
RE: BTU Analyzer
The WOBBE number is BTU/cf / Specfic gravity^.5. If you look at the equation it is the equation of flowrate through a fixed orifice at constant differential pressure, temperature, and inlet pressure times the BTU/cf.
A wobbe index machine is either flame temp btu analyzer with a gas gravity machine or the gas chromatograph can calculate the gravity ad get the wobbe. Some machines use two calibration samples and can get extract wobbe from the flame temperature alone.
I perfer going with a GC to get all the information. Daniels makes a good one in my book.
RE: BTU Analyzer
The Cosa analyzer provides heating value information such as BTU or Wobbe Index. This requires a bit of a sample system, calibration gasses, etc. For a bit more money you get the Daniel, ABB Total Flow or other simple GC that provides more information. ABB also sells a transmitter-like GC for natural gas that performs BTU calculations. The BTU analyzer is instantaneous where the GC is cyclic with 3-8 minutes per analysis. ABB, Siemens and Rosemount Analytical all sell more complex GC's if required for the specific components of your stream.
Search for an ISA paper presented at the Analytical Division in April 2006. This paper by Siemens and Lyondell pertains to the Siemens MicroSAM GC.
RE: BTU Analyzer
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: BTU Analyzer