Energy system modelling with ASCEND

This page will summarise the models that exist for energy system modelling using ASCEND.

Expanding our modelling of energy systems is the focus of the GSOC 2009 project of User:JoseZapata.

models/johnpye/rankine.a4c: model of simple, reheat, regenerative and reheat-regenerative Rankine cycles, including simple first-order component models of pumps, turbines, feedwater heaters, condensers and boilers.
Data reader: system for reading weather data for use in dynamic simulations eg of solar energy systems.
models/johnpye/thermalequilibrium2.a4c: dynamic model of heat transfer from superheated steam to subcooled water (needs updating to use current version of freesteam).
models/heatex.a4c: detailed model of a condensing heat exchanger (uses CMSlv)
models/pipeline.a4c: model of a pipe flow network including one-way check valves (uses CMSlv)
Calculation of sun position
Advection equation model, models/johnpye/advection.a4c
models/johnpye/moody.a4c: plotting a Moody (pipe friction) diagram using ASCEND (needs some external components, yet to be packaged)
models/johnpye/radialheatloss.a4c: modelling of radial heat loss though pipe and insulation.
models/johnpye/cavity.a4c: modelling of radiation balance in a cavity (by Radiosity method)
FPROPS: calculation of properties of ammonia, water, hydrogen, nitrogen directly from Helmholtz functions.
models/johnpye/simple_pv.a4c: model of a simple photovoltaic cell (thanks to Ioan-Alexandru Lazar)
models/johnpye/exergy.a4c: simple demonstration of exergy destruction in mixing of two fluids.