تحقيق تجريبي وعددي لتحسين تبريد مكيف الهواء باستخدام مواد نانوية

An Experimental and Numerical Investigation of Air Conditioning Cooling Enhancement Using Nano Materials

Abstract

The objective of this research is to study the effect of utilizing (Al2O3-R22 and Ag-R22) nanofluids as heat transfer agent in the performance of the air conditioning system.
The investigation in this study has been conducted experimentally by utilizing a test rig and numerically through designing 3D models by using the Computational Fluid Dynamics (CFD) software.
The experimental tests consisted of an air conditioner, lubricant oil, working fluid system (R22), heat resistant and measuring devices such as pressure gauge, temperature recorder meter, and thermocouples. Temperature and pressure were measured in different positions.
In the numerical analysis, the static behavior of a fluid in the evaporator part of the air conditioning was determined. The suitable boundary conditions and governing equations were performed and solving by utilizing 3D Computational Fluid Dynamics (CFD) and ANSYS workbench (version 16.1). The inlet and outlet temperature and pressure were obtained from ANSYS FLUENT after input the data base from experimental work then they compared with the experimental results.
Both numerical and experimental results were proved that the pressure of the working fluid at inlet and outlet evaporator was decreased when utilizing appropriate nanofluids. While the temperatures increased with nanofluid.
The experimental results showed that the maximum difference in the temperatures was obtained at (0.15 wt. %) nanofluid for Ag-R22.
From the results, the maximum enhancement in the COP was when adding the (Ag) nanoparticles to the refrigerant R22 by (0.15% wt.) and the enhancement increased by (144.71) %.