integration of solid oxide fuel cells and ... - Ea Energianalyse

E.1. Simulations and Results
E.1.2
E.1.2.1
∆T for external circuits
∆T EV AP
The temperature of the chilling water into the evaporator (T 48 ) is set to
11 ◦ C (this value is not changed in this simulation). ∆T min,EV AP is 5 ◦ C so
to prevent the refrigerant (water) from freezing, ∆T EV AP can not be larger
than 6 ◦ C.
Figure E.2
When the temperature increase in the chilling water circuit (∆T EV AP )
is decreased from 5 ◦ C to 1 ◦ C, the COP ABS,f uel is increased a little over 3%
(1,5 percent points), see figure E.2. So there is a little to gain, but since
both the evaporator and the hex at the other end at the external circuit
has to be larger (and hence more expensive) it is probably not one of the
best places to optimize the process.
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