A study and technical problems as that design and execution works of refrigerant piping in case of HFC407C, HFC410A of new refrigerant for air conditioning

摘要

It is the purpose of this paper to point out that we describe the outline of considerations in newrefrigerant, those are HFC407C and HFC410A, and are used from 1998 in Japan and are zero ofozone destruction factor.This is a preliminary report and we mention briefly the important items among those, copperpiping's resisting pressure, pipe thickness, operative condition, refrigeration effect, coefficient ofperformance, pipe resistance and execution works problems.