PhD Thesis - Energy Systems Research Unit - University of Strathclyde

together if desired, and taken forward for matching with the demand profiles.
Each combined supply set has three supply profiles associated with it (for
electricity, heat and hot water). It is not possible to use any of these supplies to
meet the transport demand. A typical output graph for this section is shown in
Figure 4.7.
Supply (kW)
5
4
3
2
1
0
0 4 8 12 16 20 24
time
Figure 4.7 Typical Output Graph for the Intermittent Supply Definition Section
A Supply Profile Designer has also been added in the intermittent supply section
to allow known supplies, constant supplies such as geothermal, base load
nuclear, or other conventional supplies etc, to be added to simulations. This
functions in the same way as the other Profile Designers, but only supplies of
electricity, heat and hot water can be defined.
If fuel using supplies are chosen later in the procedure, intermittent sources will
be considered first when matching supply with demand, as they provide a source
of energy that is, effectively, free after initial manufacturing and installation
costs (i.e. no fuel is required). The matching procedure is discussed later.
4.2.3 Supplies Which Follow Demand and/or Require Fuel
Supplies that are used to meet the excess demands not met by the intermittent
supplies are classed as load following supplies. Their output depends on the
required demand and there are various different types that need to be considered
here, including: -
91