Heat pump system, method for adjusting temperature of lubricating water in heat pump system, and method for operating heat pump system

摘要

A heat pump system, a method for adjusting a temperature of lubricating water in a heat pump system, and a method for operating a heat pump system, which suppress boiling of lubricating water for bearings (51) and thereby minimize the deterioration in reliability of the bearings (51). A heat pump system comprising an evaporator (42) for generating steam, and a compressor (34) including a first stage (33) and second stage (32) as a plurality of compression means for compressing the steam, wherein bearings (51) for supporting the compressor (34) are water bearings, and lubricating water in each of the water bearings (51) is controlled to a temperature less than a saturation temperature associated with an internal pressure of each water bearing (51)