Thumper Demo                                {USE WORD WRAP}
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Thumper is a Windows based User Friendly program designed to provide a comprehensive performance analysis of reciprocating compressors in a time saving manner. It provides comprehensive on-line help which defines all its main features and offers direction for compressor modeling.


Thumper key benefits can include:

 increased production capacity
 reduced energy operating costs
 reduced maintenance costs
 safer operation by establishing pressure limits
 reduced engineering evaluation costs
 easy what-if scenario and compressor re-application analysis
 an educational tool
 tool for data presentation
 almost certain to Pay For Itself the 1st time it is applied to a real life situation.

 
Basic operating and engineering capability includes:
   compressor capacity
 actual condition volumetric flow
 external rod load
 discharge temperatures
 required power for compression service
 crosshead pin reversal and rod thread stress analysis
 modeling of different gas properties can be easily based on either the Redlich Kwong or Lee Kesler equations of state, 
 a selection of hydrocarbon gases from methane to octane and CO, CO2, H2S, water vapour, and others, 
 interchangeable use of customary (imperial) units and SI (metric) units, 
 on screen and printer plotting capability, and
 the option to save plotted data in ASCII files that can be imported by spreadsheets and word processors to afford easy presentation of results.
 


General Information
-------------------

The demo version of Thumper is titled 'Demo.exe'.  Its ability to analyze compression performance is limited to three demonstration files titled demo1.mch, demo2.mch and  demo3.mch. Each of these files can be manipulated to model any reciprocating compressor performance that is desired,  but only the original unchanged files can be loaded by the Demo.  The print feature is disabled in this version.


Software Installation
---------------------

Create a directory called Thumper (or any other name) and copy the files on the diskette to the new directory.  Thumper does not have to be placed in any specific directory.  

The file BWCC.DLL should be placed in the Windows\System directory, or alternately the Thumper directory.  Make sure that you do not copy it over a newer version of the file.  

You may find it useful to create a separate sub-directory for each new compression application to avoid over-writing existing file names.


This diskette has the following files included: 
	Demo.exe
	Thumper.hlp
	BWCC.dll
	Demo1.mch
	Demo2.mch
	Demo3.mch
	Demo.txt  (this file)

NOTE: 	It is important that SMALL FONTS be selected in the display properties.  If large 
====	fonts are active, the text along the bottom of dialog box is not visible as the 
	large font takes up too much room.



Quick Use Hint
--------------

Check with the help file, there is a large amount of resource information contained it.  The basic information that the program uses is contained in the 'Main' dialog window, the 'Gas Composition' dialog and the 'Valve' dialog. If the first two are completed, the program will function.  Completing the 'Valve' dialog gives accuracy. Studying the demo files will help you understand what information needs to be entered.



Resolving Discrepancies
-----------------------

The compression power and capacity predicted by Thumper are generally within 5% of the manufacturers predictions and frequently far more accurate.  (The predicted power is consistently calculated to be slightly higher and the predicted capacity may be lower).  Actual field performance testing of a compressor may find that Thumpers results more closely represent the actual conditions.  The single largest discrepancy, assuming an accurately defined compressor model, is incorrect gas conditions and inlet temperatures.

Entering the gas composition for a gas instead of its specific gravity improves the accuracy.  The gases compressibility and ratio of specific heats is approximated with the gas gravity but is more accurately calculated with an equation of state if the composition is defined.

Establishing the valve spring opening force and the valve flowing pressure drop has significant impact on the performance prediction.  If these values are left as zero the compressors performance becomes very idealistic.

External rod load is based on compressor flange pressures and is precisely based on those pressures.


As a rule if the results appear wacky check the following:
1) the gas analysis is reasonable
2) the valve data dialog window is completed
3) the atmospheric pressure is entered
4) the number of cylinders have been defined
5) head and crank end fixed clearance and unloader clearances have been correctly identified

If the previous steps do not resolve the problem, go back to basics and enter a set of the manufacturers predicted data.  Adjust the valve characteristics until reasonable conformance, or calibration, to the manufacturers data is achieved.  Try modeling the off design operating conditions.

If all else fails, save a copy of the file on a diskette and mail it to BlueSky Machinery Knowledge Co. along with a brief description of the problem.  BMKC will attempt to resolve the issue and communicate a solution.  Alternately Email a description of the problem with the mch file as an attachment.



Ordering Information
--------------------

Thumper is available from

BlueSky Machinery Knowledge Company Ltd.
Box 12, Site 26, RR4
Calgary, Alberta  T2M 4L4
Canada
Phone Messages: (403) 274-9888 (inquiries & phone mail)

E-Mail at    'thumper@cadvision.com'
HomePage at  http://www.cadvision.com/Home_Pages/accounts/thumper/bluesky.htm

Cost: $500 Cdn (plus GST, Canada) and shipping
Bank draft or certified cheque accepted

Windows is a registered trademarks of Microsoft Corporation.
