High-temperature heat pump for heat recovery in e.g. ORC system, has auxiliary devices enabling temperature stroke of specific degrees Celsius with coolant, and compressor designed as piston compressor and directly connected with drive

摘要

The pump has a compressor (2) designed as a piston compressor or screw compressor, two outer heat exchangers and an inner heat exchanger (6). Auxiliary devices enable temperature stroke of 0 to 120 degrees Celsius with coolant e.g. propane or R365. The compressor has a sealing and lubricating system for high temperature area at a compressor outlet. The compressor is directly connected with a compressor drive (3) e.g. permanent magnet synchronous motor, or driven by an externally-driven system. A PID-controller is arranged in a control device (7). An independent claim is also included for a method for controlling high-temperature heat pump.