The CPD model was developed in FORTRAN, and has been used on numerous platforms. It has been included into several comprehensive CFD models (computational fluid dynamics). Typical stand-alone calculations are performed in less than 1 CPU second on a personal computer. Generally, two versions of the CPD model are available: (1) particle temperature versus particle residence time are required input; and (2) gas temperature and particle residence time are required input. Version (2) solves the particle energy equation and calls the CPD model as a subroutine. This version includes effects of convective heating, simple radiative heat exchange with the walls, and effects of high mass transfer.

The use of the CPD model is recommended for those technical specialists with expertise in this technology. The CPD model was developed as a joint research effort, and is available to all interested parties at no cost. Should handling charges become excessive, a small fee for copying and handling will be charged. No support is available from ACERC in using of this model.

To obtain a copy of the code, contact:

Dr. Thomas H. Fletcher Dept. of Chemical Engineering Brigham Young University 330 EB, Provo, Utah 84602 Phone: (801) 422-2586 Fax: (801) 422-0151

E-mail: tom_fletcher@byu.edu

On-line verions of the code are available as well. Several versions are available:

 

Input Requirements	Original Version (1992)	NLG version
Particle temperatures vs. time	CPD	CPD_NLG (1999)*
Gas temperatures versus distance (requires particle velocities, solves particle energy equation)	CPDCP	CPDCP_NLG (1999)*
Constant particle heating rate and subsequent hold time		CPD_heat (2004)
Updated for a new swelling correlation		CPDCP_NLG_swell (2011)
Matlab version of CPD-Heat		CPD_Heat_MATLAB (2020)

* (developed by Perry, Genetti, and Fletcher, 1999)

A summary document of the equations and theory of the CPD model was originally written as a Sandia Technical report (SAND92-8207; May, 1992; Available NTIS). For ease of transfer, this summary document is available as a pdf file.

A user's manual is available also by mail or online as a pdf file.
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The CPD model has been distributed internationally, and has been included into two publicly available comprehensive boiler simulation codes, including:

Richard Buckius	Univ. of Illinois
M. Pourkashanian	Univ. of Leeds, England
Alan Sayre	McDermott Technologies, Inc.
Michael Groenhout	Airflow Sciences
Lasse Sorensen	RISO National Laboratory, Denmark
Terry Wall	University of Newcastle, Australia

and in PCGC-3 (Pulverized Coal Combustion and Gasification - 3-Dimensional; developed at Brigham Young University) and Fluent (the largest commercial code for 3-D computational fluid dynamics in the world).

The CPD model was developed by Thomas H. Fletcher and Alan R. Kerstein at the Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551-0969, and Ronald J. Pugmire, Mark Solum, and David M. Grant, Departments of Fuels Engineering and Chemistry, University of Utah, Salt Lake City, Utah 84112, with some follow-on work performed by Dr. Fletcher where he is currently with the BYU Department of Chemical Engineering. The research at Sandia was supported by the Department of Energy's Pittsburgh Energy Technology Center's Direct Utilization AR&TD;Program and the DOE Division of Engineering and Geosciences through the Office of Basic Energy Sciences. The research at the University of Utah was supported by the National Science Foundation through the Advanced Combustion Engineering Research Center (ACERC) at Brigham Young University and the University of Utah, by the Department of Energy Division of Chemical Sciences, Office of Basic Energy Sciences, and by the Associated Western Universities (AWU) who provided summer faculty fellowships for Professors Pugmire and Grant to spend time at Sandia. Funds for the ACERC center are also received from the State of Utah, 75 industrial participants, and the U.S. Department of Energy.

Brief Description of the CPD model