Akademik Veri Yönetim Sistemi
5th International Conference on Engineering and Natural Sciences, Praha, Çek Cumhuriyeti, 12 - 16 Haziran 2019, cilt.1, sa.1, ss.151-159
Heat transfer enhancement is a critical and important phenomenon to save energy and cost, reduce size of
the systems and protect the environment from the waste energy effects. Passive heat transfer enhancement
method is the most used method since it does not require an energy input to the system. Twisted tape, coiled
wire, dimpled surface are the most commonly used methods of the passive heat transfer enhancement
method. In this paper, a detail review investigation is conducted on experimentally heat transfer
enhancement method by many various configurations of the twisted tape. Addition to geometrical properties
such as width, pitch, thickness, different processes implemented such as separated from the inner wall,
perforated, center-cleared, jagged twisted tapes effects on thermal and hydraulic performance are
examined and discussed. It is observed that the use of twisted tape is quite effectively method for heat
transfer enhancement in a tube, since it generates swirl flow through the tube and destruct the thermal
boundary layer. Moreover, another advantageous of the use of twisted tape is that to supple low pressure
drop penalty compared with other inserts. It is concluded that the twisted tape will continue to use to
improve heat transfer in energy conversion systems with more effective configurations.