This study evaluated the effect of baffle configuration on heat transfer rate in a shell and tube heat exchanger using computational fluid dynamics (CFD). Simulations were conducted for baffle spacings of 66mm, 76mm, and 86mm at mass flow rates of 0.5 kg/s, 1 kg/s, and 2 kg/s. The 86mm spacing had the highest heat transfer rate and outlet temperature, indicating better performance compared to the closer spacings. Maximum heat transfer rate was 219.47kW for the 86mm spacing at 2kg/s, a 52.2% increase over the 66mm spacing. Closer baffle spacing allowed for more uniform flow distribution but restricted flow compared to wider spac