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Fig. 8.
One day thermal power profiles
Fig. 9.
One day thermal storage energy profile
b) the electrical load is always supplied by the CHP except for few time inter-
vals; by looking at Fig. 8 it is possible to note that CHP production never
follows thermal load. This fact is explained by the role of thermal storage;
c) the boiler is requested to produce thermal power only during night hours,
when the CHP electrical production is neither needed nor economical;
d) during night hours, thermal storage reaches its upper limit for some time
intervals. This fact means that the possibility of storing more thermal energy
would be useful to reduce costs.
The effectiveness of the optimal scheduling is evidenced by referring the op-
timal objective function to the cost of a non cogenerative system, where the
