Enhancement of Double-Pipe Heat Exchanger Effectiveness by Using Water- TiO2
Abstract
This study utilized Nano fluid 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 20 nm and a volume concentration of (0.5%) and (1%), respectively, of TiO2 nanoparticles being added. At 2 L/min and 4 L/min and 6 L/min, the Nano fluid flows inside the inner tube. At 20°C, the Nano fluid 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 Nano fluid as a working fluid was discovered during experiment analysis. (8%) maximum heat exchanger effectiveness obtained at Nano fluid flow rate of 2 L/min has (0.5%) volume concentration ,effectiveness (29.7%) at (1%) a volume concentration.