Page 450 - Mechanical Engineers' Handbook (Volume 4)

5 Absorption Systems 439

stage lithium bromide machine generally is 0.65–0.70 for water-chilling duty. The heat re-
jected by the cooling tower from both the condenser and the absorber is the sum of the
waste heat supplied plus the cooling produced, requiring larger cooling towers and cooling
water flows than for vapor compression systems.
Absorption machines can be built with a two-stage generator (Fig. 7) with heat input
temperatures greater than 150 C. Such machines are called dual-effect machines. The oper-
ation of the dual-effect machine is the same as the single-effect machine except that an

Figure 7 Two-stage water–lithium bromide absorption system. 17