[BLDG-SIM] VisualSPARK 1.0 available

Fred Winkelmann fcw at pegasus.lbl.gov
Fri Nov 17 10:12:53 PST 2000

VisualSPARK 1.0 is now available from Lawrence Berkeley
National Laboratory. VisualSPARK allows you to build customized
models of complex physical processes by connecting calculation
objects. It is aimed at simulation of innovative building systems.

VisualSPARK features:

 * Solves nonlinear dynamic systems of arbitrary complexity --
   from a few equations up to thousands of equations

 * User-specified time step (variable time step is planned
   for Version 1.1)

 * Robust solution methods

 * HVAC component library

 * Dynamic plotting allows results to be plotted while
   simulation is running

 * Up to 20 times faster execution times than related programs
   (through use of graph-theoretic methods for problem size

The main elements of VisualSPARK are a USER INTERFACE, a
PROCESSOR. With the network specification language you create
calculation objects and link them into networks that
represent a building's envelope or HVAC system. The solver
solves this network for user-specified input parameters.
The results processor graphically displays the results.

VisualSPARK runs under the Windows 95/98/NT/2000, SunOS,
Solaris, Linux and HPUNIX operating systems.

VisualSPARK costs $250. To purchase the program, go to


If you would like to get a better idea of what the program
does before purchasing it, you can review the SPARK User's
Manual, which can be downloaded from

http://SimulationResearch.lbl.gov > SPARK > SPARK User's Manual

VisualSPARK was developed by the LBNL Simulation Research Group
and Ayres Sowell Associates, with support from the U.S.
Department of Energy, Dru Crawley, program manager.

--Fred Winkelmann
  Simulation Research Group

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