Experimental investigation on the performance of chilled-water air conditioning unit using alumina nanofluids

In the present paper, the performance of chilled-water air conditioning unit with and without alumina nanofluids has been experimentally investigated. The first method technique was used to prepare Al2O3-water nanofluids. Al2O3 nanoparticles was added with water in the cooling tank through using different concentrations by weight varies from 0.1, 0.2, 0.3, and 1% wt. and the alumina nanofluids have been continuously supplied to the cooling coil. The experiments have been performed under operation conditions include a variation of flow rate of chilled water/alumina nanofluids and the air through the cooling coil. The experimental results have been shown a less time is achieved to obtain the desired child fluid temperature for all the different concentrations of nanofluids (Al2O3-water) compared with pure water. Also, the results revealed a reduction of the power consumption and increasing the cooling capacity which in turn increasing the COP by about 5%, and 17% for alumina nanoparticles concentration 0.1, and 1% by weight respectively.