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

5. SIMULATION AND RESULTS
Figure 5.4: T COND is the condenser temperature (upper x-axis). ∆T COND is the change of the
condenser temperature (lower x-axis). w ss and w ws is the concentration of the strong and weak
LiBr-solution on mass basis. p Hi g h and p Low is the pressure at the condenser and evaporator
respectively (right y-axis)
strong LiBr-solution (w ss ) must decrease in order to keep the solution
at equilibrium, see appendix B.4.2 page 232.
As w ss decreases it approaches w ws as seen in figure 5.4. If T COND
increases to 42 ◦ C the concentration of the strong and weak solution
becomes equal and COP ABS drops rapidly since no refrigerant is sent to
the condenser.
COP ABS has no optimum with respect to ∆T COND within the simulated
range - the condenser temperature should just be as low as possible.
But since the curve is almost flat on the left hand side of the graph, it
can be concluded that a condenser temperature of about 30 to 35 ◦ C is
sufficiently low for the given parameter configuration (of the single cycle
configuration).
110