HEAT PIPE CODE

The NASA Lewis Research Center Heat Pipe (LERCHP) code was developed to
predict the performance of heat pipes in the steady state. LERCHP can be
used as a design tool on a personal computer or, with a suitable calling
routine, as a subroutine for a mainframe radiator code. For accurate heat
pipe modeling, a variety of wick structures are available to the user,
including a user wick input option. Several working fluids can be chosen
as well, including potassium, sodium, and lithium, for which the
monomer-dimer equilibrium is considered. A vapor flow algorithm is
incorporated that treats compressibility and axially varying heat input.
LERCHP also facilitates the determination of heat pipe operating
temperatures and heat pipe limits that may be encountered at the specified
heat input and environment temperature.

Heat pipes with multiple evaporators, condensers, and adiabatic sections in
series and with wick structures that differ among sections can be modeled
by LERCHP. The heat pipe can be subdivided into as many as 20 sections
which can be heat input or evaporator sections, adiabatic sections, and
heat removal or condenser sections, mixed in any manner provided that the
first section is a heat input section. Output, such as liquid and vapor
pressures and temperatures, is printed at equally spaced axial positions
along the pipe as determined by the user.

LERCHP is written in FORTRAN 77 for IBM PC series and compatible computers
running MS-DOS.

NASA's Software Technology Transfer Center
COSMIC, The University of Georgia
382 East Broad St, Athens, GA 30602-4272
(706) 542-3265;  Fax: (706) 542-4807
Internet Email: service@cossack.cosmic.uga.edu

 ==========================================================
 From the 'New Product Information' Electronic News Service
 ==========================================================
 This information was processed from data provided by the
 above mentioned company. For additional details, contact 
 the company at the address or telephone number indicated.
 ==========================================================
 All submissions for this service should be addressed to:
 BAKER ENTERPRISES,  20 Ferro Dr,  Sewell, NJ 08080  U.S.A.
 Email:  RBakerPC (AOL/Delphi), rbakerpc@aol.com (Internet)
 ==========================================================
