This paper presents an experimental and numerical study to investigate the heat transfer enhancement in a horizontal circular tube using hybrid nanofluid (CuO, Al₂O₃/ distilled water) fitted with twisted tape (typical tape, twist ratios (TR=9.2). Under fully developed turbulent flow uniform flux conditions, studied concentrations are (=0.6, 1.22, 1.8% by volume). The test rig includes all requi...

The present work deals with the theoretical study on heat transfer characteristics and the performance of a cylindrical parabolic solar water heater with twisted tape inserted inside the absorber tube. The absorber tube equipped with twisted tape with six different twist ratios 5, 6, 7, 8, 9 and 10. The theoretical work is conducted in a turbulent flow regime and considering water as a working ...

To create a highly efficient photovoltaic-thermal (PV-T) system and maximise the energy exergy efficiency, this study aims to propose an innovative configuration of PV-T comprising wavy tubes with twisted-tape inserts. Following validation numerical model, parametric has been conducted assess geometrical effects twisted tape tubes, as well coolant fluid type velocity, on overall performance sys...

Heat transfer improvement in circular pipe by using nanofluid and twisted tape is presented in this review paper. Experimental and numerical studies are incorporated involving both the range of turbulent and laminar flow. Effect of type and volume fraction of nanofluid on performance of heat transfer was referred along with the length and twist ratio of the tape through the pipe on heat transfe...

In the title mol-ecule, C(10)H(8)N(2)O(4), the imidazolidine ring adopts a twisted conformation. In the crystal, the mol-ecules are linked via a pair of bifurcated inter-molecular O-H⋯O hydrogen bonds, forming an inversion dimer. The dimers are further linked via N-H⋯O hydrogen bonds into a tape along the b axis.