Energy system modelling with ASCEND

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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.