Most absorption refrigeration systems are put in place where there is cheap excess or waste heat available. What is this heat primarily used for?
a. To pressurize the system
b. To evaporate the water out of the weak Lithium Bromide
c. To decrease the evaporation point of the refrigerant
d. To maintain a minimum load on the system, during periods of low cooling demand
e. To maintain the continuous vacuum
Answer: B