... characteristics are influenced by the outer coil shape. Wang (2006) presented a numerical investigation on heat pump water heaters (HPWH). The results showed that the impact of geometric parameters on heat transfer enhancement largely depends on the coil’s outer diameter. Yang et al. (2014) proposed...

...Shanmukh Sudhir Arasavelli; Ramakrishna Konijeti; Govinda Rao Budda Purpose This paper aims to deal with heat transfer enhancement because of transverse vibration on counter flow concentric pipe heat exchanger. Experiments were performed at different vibrator positions with varying amplitudes...

... thermo-physical properties. The effects of the solids volume fraction and the size of the micro-channel on heat transfer enhancement have also been investigated. Design/methodology/approach The authors use the flow of a water-Al2O3 nanofluid and a single-phase approach. The equations are solved using...

... of peripheral cut, (m) P = Plain tube Tube inserts are heat transfer enhancement devices that provide an important tool in heat transfer enhancement, especially for shell-and-tube exchangers with plain tubes. The most common types are: twisted tapes with high and low twist ratios...