Heat pump system, operation procedure therefor and evaporator system

摘要

In a heat pump system including a water purifier (1) and an evaporator (2) for evaporating feed-water (10) to produce steam (12), water (11) used for spray cooling is effectively used and productivity of purified water used for the spray cooling is increased. Discharged water (21) from the water purifier (1) is supplied to the evaporator (2) when water used for spray cooling is produced by use of the water purifier (1). Otherwise, drain (22) of the evaporator (2) having higher temperature is supplied to the water purifier (1) by using such a fact that in a reverse osmosis membrane type water purifier (1), the higher the temperature of feed-water (10) is, the higher the purified water productivity becomes.