EXPERIMENTAL INVESTIGATIONS TO STUDY THE INFLUENCE OF TWISTED TAPE INSERT ON HEAT TRANSFER EQUIPMENTS Â AN EXTENSIVE REVIEW

Heat transfer augmentation with compact and effective manner are the recent developments of the heat exchangers. Considering cost reduction, simplicity, compact size etc were the parameters considered for the design and development of heat exchangers. Use of passive techniques like creating fins, rough surface on the flow path, wire coil inserts, generation of swirl on the flow path and mounting inserts like blocks, winglets and twisted tapes were the impressive methods of heat transfer intensification in heat exchanger design. Twisted tape is the technique that supports to enhance the heat transfer in heat exchanging devices. Many investigators involved on the experimentation to enhance the rate of heat transfer employing twisted tapes by varying the twisted tape geometry , twisted tape shape and the size of the duct etc. This extensive review emphases on the argumentation of heat transfer by twisted tape insert with varying twisted tape geometry, is discussed and disclosed in detail. This review revealed the outcomes of the literatures reported for the past decade.