To effectually utilize even a relatively low temperature heating fluid and ensure stable operation even with a heating source where the amount of waste treat is varied by constructing a freezer such that a regenerator has two or more regenerators of a high pressure side one and a low pressure side one, and the heating fluid of the regenerator heats each regenerator.
High temperature water is supplied to a waste heat recovery apparatus 2 with a pump 3, and heat is recovered from waste gas, etc., supplied from a nozzle 4. The waste gas is cooled and discharged from a piping 5 to the outside. Heated warm water is parallely sent to a high pressure side regenerator 7 and a low pressure side regenerator 8 through branch pipes 6, 6', and the solution is heated in the respective regenerators to vaporize the refrigerant. Vapor is produced in the high pressure side regenerator 7, and the remaining weak solution absorbs the vapor in a high pressure side absorber 14. However, refrigerant gas absorbed by the high pressure side absorber 14 is the sum total of vapor produced in the low pressure side regenerator 8 and refrigerant gas sent from a compressor high pressure stage.
OGAWA YASUO
SUSAMI SHU
GEORUKU AREFUERUTO
