Abstract
Modeling and optimization of a double-inlet pulse tube refrigerator (DIPTR) is very difficult due to its geometry and nature. The objective of this paper was to optimize-DIPTR through experiments with the cold heat exchanger (CHX) along the comparison of cooling load with experimental data using different boundary conditions. To predict its performance, a detailed two-dimensional DIPTR model was developed. A double-drop pulse pipe cooler was used for solving continuity, dynamic and power calculations. External conditions for applicable boundaries include sinusoidal pressure from an end of the tube from a user-defined function and constant temperature or limitations of thermal flux within the outer walls of exchanger walls under colder conditions. The results of the system’s cooling behavior were reported, along with the connection between the mass flow rates, heat distribution along pulse tube and cold-end pressure, the cooler load’s wall temp profile and cooler loads with varied boundary conditions i.e. opening of 20% double-inlet and 40-60% orifice valves, respectively. Different loading conditions of 1 and 5 W were applied on the CHX. At 150 K temperature of the cold-end heat exchanger, a maximum load of 3.7 W was achieved. The results also reveal a strong correlation between computational fluid dynamics modeling results and experimental results of the DIPTR.
Highlights
The pulse tube cooler was a technology that evolved with a series of developments primarily in the beginning of the 1980s
The dimension of double-inlet pulse tube refrigerator (DIPTR) was taken in L/D ratio, which was for transfer line 21.098, after cooler 0.846, regenerator 9.772, heat exchanger cold-end 1.470, pulse tube 16.8, heat exchanger hot-end 0.956 and for reservoir 2.772
In the C programming language, a user-defined function (UDF) for gas pressure and depressurization was built in the closed chamber
Summary
The pulse tube cooler was a technology that evolved with a series of developments primarily in the beginning of the 1980s. For several industrial applications, such as gas separation and liquefaction, the new type of pulsing tube refrigerator with a low-temperature valve was introduced. One of the best differentiating techniques of the double-inlet pulse tube refrigerator (DIPTR) simulation is the finite volume method (FVM) to obtain these factors. This FVM approach addresses legislative equations for liquid mass flow, heat exchange and problems with fluid diffusion, and the results are consistent with the formulas for preserving weight, momentum and energy [1].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
