Mechanical Refrigerator for Deep Well Sonde Electronics, Phase II. Final Report

摘要

The system is based on a vapor cycle refrigeration system with the usual compressor, evaporator and condenser. It is designed to operate between a condensing temperature of 275 exp 0 C and an evaporating temperature of 125 exp 0 C. Water vapor is the refrigerant. The compressor is an electric motor driven three-stage positive displacement machine. The design output of the refrigerator is 50 watts cooling. The work described covers the development of the compressor with associated component development tests. The compressor was tested in a loop simulating downhole conditions. Short duration runs were accomplished where study state conditions of refrigerant and lubricant flows were established. However, because of various component failures, sustained operations, greater than 6 hours at a time, could not be made. (The design goal was 100 hours.). (ERA citation 05:017618)