PhD Thesis - Energy Systems Research Unit - University of Strathclyde

Separate databases have been created for each demand type in Profile Designer,
and the demand type is saved along with the profile information, allowing the
correct profile type to be created in the demand definition section.
This part of the procedure is called the demand definition section, and a typical
output of this section is illustrated in Figure 4.3. This shows the demand for one
day, but any time period up to a year may be analysed. For simplicity this
graph shows only one demand, however a number of demands for all the
different energy uses may be added together, as shown in Figure 4.4, and this
combined demand is taken forward for subsequent matching with the output of
the chosen supply technologies (defined later). Each combined demand set has
four demand profiles associated with it (one each for electricity, heat, hot water,
and transport). Some of these may, however, be zero profiles if there is no
demand for that particular energy type, and if, for example, two electricity
demands are chosen for combination, these are added together. Overall
consumption (per day, year etc) for electricity, heat and hot water is measured in
kWh, and transport in kilometres. The rate of consumption is measured in kW
and km/hour.
Demand (kW, km/h or l/h)
3.5
3
2.5
2
1.5
1
0.5
0
0 2 4 6 8 10 12 14 16 18 20 22 24
Time (hours)
Figure 4.3 Typical Output of Demand Definition Section for One Day
84