Author : S.M.Mali and R.K. Patil

An experiment is carried for the measuring the performance of Tube and Tube heat exchanger with insertion of semispherical Hollow baffle for parallel flow and counter flow. A Copper tube of 25 mm internal diameter and 30 mm outer pipe inner diameter. Length of whole test tube is 1000 mm is used. A stainless steel semispherical hollow baffle having diameter 25mm. This paper compare the performance of tube and tube heat exchanger with and without insertion of hollow semispherical baffle for counter flow As well as comparison for parallel flow and counter flow for the insertation of the semispherical hollow baffle tube .experimental results depend on the estimating various heat transfer characteristics. That is nusselt number and the friction factor. Insertion of semispherical Hollow baffle enhances the heat transfer rate with apperatietely increasing friction factor. This experiment also predicts the performance for different Reynold no. range. Heat transfer rate after inserting semispherical hollow baffle tube is higher for the counter flow as compared with the Parallel flow heat exchanger

Keywords: Heat transfer enhancement, hollow semispherical baffle, heat transfer rate.