PhD Thesis - Energy Systems Research Unit - University of Strathclyde

Stage 3 - Auxiliary Systems (dependant on demand and/or fuel availability)
The auxiliary system definition window gives the opportunity to define the plant
and control characteristics for a range of auxiliary system types, including
electricity storage devices, engines, turbines, fuel cells, heating systems, heat
storage systems, electrolysers and vehicles. Again, each technology has its own
definition window, which functions in the same way as the supply windows. As
the performance of the auxiliary systems cannot be calculated until the demand
and supply matching stage, a description of the system appears in the window
when each system has been defined. If this is satisfactory, it may be accepted in
exactly the same way as for the demand profiles.
7.1.4 Match and Dispatch
The final stage is to match supply and demand. When the matching window
opens, the fuel choice window also opens, allowing the choice of which fuels
will be available for consideration (see Appendix 1). This choice may be
changed at any time during matching. It is important to avoid unnecessary fuel
production, as energy demands are often associated with these.
The chosen demand, supply and auxiliary profiles are given as buttons at the top
centre of the screen. Different combinations can be tried by clicking once on the
different buttons to select them and twice to clear and start again. To see which
profile is which, hover over the button for a few seconds and the name will
appear below the cursor. Any number of profiles may be chosen for matching,
and the auxiliary profiles are applied in the order in which they are chosen.
Three graphs are shown at the bottom:
• Graph 1 - Demand and Supply
• Graph 2 - Residual Power
• Graph 3 - Auxiliary Performance.
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