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

1. INTRODUCTION
Cycle description.
As mentioned, the absorption cycle is very similar to the vapor
compression cycle - the mechanical compressor is just replaced by a
”thermal compressor”. This consists of a desorber 9 (DES), an absorber
(ABSO), a solution heat exchanger (SHEX), an expansion valve (VB), and
a pump as seen in figure 1.2.
COND
1
HEAT
DES
COOLING
9
7
2
SHEX
3
VA
EVAP
4
11
12
VB
ABSO
PUMP
6
5
CHILLED WATER
COOLING
Figure 1.2: Diagram of single stage absorption cycle
The principle of the absorption cycle will now be described.
numbering refers to the state points appearing in figure 1.2.
The
1 → 2: Superheated refrigerant at high pressure is condensed to
saturated liquid in the condenser (COND). The heat is removed by
an external cooling circuit.
2 → 3: The pressure of the liquid refrigerant is reduced from the
high to the low working pressure by the expansion valve (VA).
9 This is some time called a generator, but the phrase desorber will be used throughout
this report.
10