THE PERSUADE OF THE TUBE-IN-TUBE COMPACT HEAT EXCHANGER TO INCREASE THE PERFORMANCE OF JOULE-THOMSON REFRIGERATION SYSTEM

摘要

Recent importance on energy conservation has resulted in new efforts to develop more efficient refrigeration systems for achieving low temperatures. The Joule-Thomson (J-T) concert has been widely used for achieving low temperatures. In the past few years, much progress has been made in better understanding of working mechanism of the refrigeration system. Joule-Thomson refrigeration system using Liquefied Petroleum Gas (LPG) show a lot of promise in producing low temperatures due to their efficiency, simple construction and operational reliability. The overall performance of the refrigeration system is governed by the selection of the refrigerant and heat exchanger used. In this work, a Joule-Thomson refrigeration system experimental setup has been developed to investigate the influence of a Tube-in-Tube compact heat exchanger in between condenser and expansion device. Experiments were conducted with the LPG refrigerant. The Joule-Thomson refrigeration system consists of compressor, condenser, heat exchanger, expansion valve and evaporator. Tube-in-Tube compact heat exchanger was fabricated and tested in the experimental setup. The copper meshes and copper wires are used as extended surface in this compact heat exchanger. The different design arrangement of wires and meshes are introduced in this compact heat exchanger.