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

5.1. Basic absorption cooling
as described in section 5.1.1 about the desorber (now it is just the
strong solution concentration which is constant, and the weak solution
concentration which is changed).
So T ABSO and T DES should be adjusted relative to each other to give
the optimum performance. One should remember that since the heat
is rejected to the surroundings, T ABSO is to a certain extend determined
by the ambient temperature, so the concentration difference is probably
easiest to adjust by changing T DES . This would in praxis be done by
changing the flow rate of the LiBr solution relative to the heat input into
the desorber.
5.1.5 Summing up the general behavior of the
absorption cycle
In table 5.1 the characteristics of the absorption cycle is summed up. ↑
symbols an increase for the current variable. The ↕ for COP ABS in line one
indicates that the optimum is near the standard parameter configuration
value of T DES .
Table 5.1: General behavior of a single stage absorption cycle.
Temperature Pressure Concentration Performance
T DES ↑ ⇒ - ⇒ w ss ↑ ⇒ COP ABS ↕
T COND ↑ ⇒ p COND ↑ ⇒ w ss ↓ ⇒ COP ABS ↓
T EV AP ↑ ⇒ p EV AP ↑ ⇒ w ws ↓ ⇒ COP ABS ↑
T ABSO ↑ ⇒ - ⇒ w ws ↑ ⇒ COP ABS ↓
113