A NEW APPROACH TO DETERMINE THE THERMOPHYSICAL PROPERTIES OF SATURATED LIQUID-VAPOR MIXTURE NANOREFRIGERANTS

Date

2023-7-11

Author

Tekin, Bilgehan

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With the increasing thermal load in new technological devices and applications, demand for cooling rates increases. Therefore, enhancement in heat transfer efficiency is a vital issue. To increase the thermal performance of the vapor compression refrigeration cycle (VCRC) nanorefrigerants are used. Nanorefrigerant use in refrigerators still needs attention because there are not sufficient data to determine the thermophysical properties of nanorefrigerants. A new approach, based on an analogy to fluidized beds, to determine the thermophysical properties of nanorefrigerants in a two-phase flow of refrigerant is suggested in this study and the approach is verified using Artificial Neural Network (ANN). A case study for an evaporator in an ideal R141b VCRC is performed for four different nanoparticles (Cu, Al, Al2O3, CuO) and three mass fraction values, and the increase in COP with nanorefrigerants is reported between 4.15%-13.17%.

Subject Keywords

Nanorefrigerant, Conductivity, Viscosity, ANN, COP

URI

https://hdl.handle.net/11511/104870

Collections

Graduate School of Natural and Applied Sciences, Thesis