Design, Development and Performance Investigation of Double Inlet Pulse Tube Refrigerator

Abstract

The absence of moving components at low temperature end gives the pulse tuberefrigerator a great leverage over other cryocoolers like Stirling and GM refrigeratorsthat are conventionally in use for several decades. Pulse Tube Refrigerator (PTR)has greater reliability; no electric motors to cause electromagnetic interference, nosources of mechanical vibration in the cold head and no clearance seal between pistonand cylinder. Moreover, it is a relatively low cost device with a simple yet compactdesign. The objectives of the present work are to understand the basic phenomenaresponsible for the production of cold eect and to do experimental work with air asa working uid to study cooling behaviour of the refrigeration system and suggestingmodications to improve the performance of the PTR. The present work deals withthe Design, Development and Performance Investigation of DIPTR. This report con-sist of six chapters. In the Chapter 1 the brief review of the history of cryogenics andthe introduction of pulse tube is given. Chapter 2 describes cryocoolers and evolutionof pulse tube cryocoolers and review of analytical and experimental work reportedin the literature. Chapter 3 includes the design aspects of DIPTR and various losseswhich occur in DIPTR. In Chapter 4 the various components used in the experimen-tal test setup and operation instructions for DIPTR have been described. Chapter 5shows the results obtained by varying dierent parameters like supply pressure, fre-quencies, cycle time, bypass valve opening, orice valve opening have been discussed.In Chapter 6 the conclusion and future scope have been described.