Enhancement of Double-Pipe Heat Exchanger Effectiveness by Using Water- CuO

Abstract

 This study utilized Nanofluid as a cold fluid in evaluating the counter flow double tube heat exchanger, which was one meter long, had an outer diameter of 19 mm, and an inner diameter of 9.5 mm made from copper. Water was the basic fluid, with the size of 40 nm and a volume concentration of (0.5%)  and (1%), respectively, of CuO nanoparticles being added. At 2 L/min and 4 L/min and 6 L/min, the Nanofluid flows inside the inner tube. At 20°C, the Nanofluid enters the heat exchanger. The flow of hot water into the heat exchanger is 4 L/min through an annular space with an entry temperature of 65 °C. to achieve better heat exchanger performance, the experimental results will be compared to those obtained when using pure water. The improvement in performance with Nanofluid as a working fluid was discovered during experiment analysis. (40%) maximum heat exchanger effectiveness obtained at Nanofluid flow rate of 2 L/min has (0.5%) volume concentration ,effectiveness (54%) at (1%)  a volume concentration.