Crunch

A Batch-Style Postprocessor for Wind Turbine Data Analysis

by Marshall Buhl
supported by Greg Hayman
National Wind Technology Center

Crunch is a software utility that performs several types of analyses for one or more files. The current version of Crunch includes scales and offsets, crosstalk elimination, peak finding, statistics, azimuth averaging, histogramming, and rainflow cycle counting. Much of the code for Crunch came from my GPP and GenStats programs. Crunch performs many of the same analyses as GPP, but it is more of a batch program, whereas GPP is an interactive program. If you are performing repetitive tasks, Crunch is the better choice.

Crunch was written to process wind-turbine test or simulation data, but it is probably useful for most tabular data.

You may download the following files from our server:

  • Crunch Change Log (v3.02.00c-mlb, 26 KB, Friday, 18-Jan-2013)

    This is a list of changes made to the code. Look at this text file to see if we've made worthwhile changes since you received your previous version of Crunch.

  • Crunch User's Guide (v2.9, 442 KB, Thursday, 06-Dec-2012)

    This is the Crunch User's Guide.  Please refer to it when trying to understand how the program works. It is a bit out of date, so refer to the sample input files in the CertTest folder for the latest features.

  • Crunch Archive for Windows (v3.02.00c-mlb, 3.1 MB, Monday, 28-Jan-2013)

    This is a self-extracting archive of Crunch. It contains the Crunch executable files for both 32-bit and 64-bit Windows, sample input files, installation-verification test procedure, change log, and user's guide. It runs on all 32/64-bit Windows® platforms. We created the executable files with Intel(R) Visual Fortran Composer XE 2013.1.119.

  • Crunch Archive for Linux (v3.02.00c-mlb, 3.1 MB, Monday, 28-Jan-2013)

    This is a self-extracting archive of Crunch. It contains a makefile, sample input files, change log, and user's guide. It must be compiled for use on Linux systems.

  • NWTC Subroutine Library

    If you are going to recompile Crunch, you will need to include files from v1.07.00c-mlb of the library. To determine what files you need and in which order they should be compiled, see the file "_MergeSrc.bat" in Crunch's Source folder.

Programming Language:     Wind and Water Tools:

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If you want to refer to this website in a report, here is a reference you can use:
NWTC Information Portal (Crunch).  https://nwtc.nrel.gov/Crunch. Last modified 28-September-2014 ; Accessed 25-May-2017