A second generator is designed in a new solar p ump2f ree lit hium bromide absorption<br />chiller system to improve t he solar energy utility efficiency by decreasing t he temperat ure of heat<br />source (minimum starting temperat ure 68 -

wide operation temperat ure ranging f rom 80 - to<br />93 -)

based on the falling film absorber

t he falling film evaporator

t he lunate thermosip hon<br />elevation t ube and condenser

etc. The second generator facilitates establishing pressure differ2<br />ence between evaporator and condenser

and enhancing t he performance of absorber to make t he<br />differential concent ration and absorptivity increase in a lower initial solution concent ration. By<br />t he aid of second generator

t he yield of condensate increases 1168 times

the evaporation effect is<br />heightened obviously. The temperat ure difference of cooling water in absorber and the tempera2<br />t ure difference of chilled water in evaporator increase

and t he o