Heat Exchanger Heat Transfer Calculation. The transferred heat q of one of the liquids. Units δt lm is the log mean temperature difference in o f k for si units calculated from.
Calculate outlet temperature for hot and cold stream for given flowrates inlet temperature specific heat area of the exchanger and overall heat transfer coefficient u exchanger type double pipe parallel flow double pipe counter flow shell tube 1 shell 24tube passes shell tube 2 shell. The heat transfer area can be calculated after values have been determined or estimated for the required heat transfer rate q. Enter two of the three shaded portions for hot.
Where is the density of the fluid is the mean velocityof the fluid is the specific heat of the fluid and is the mass flow rate of the fluid.
Qt u aflmtd 21 where qt is the total heat load to be transferred u is the overall heat transfer coefficient referred to the area a a is any convenient heat transfer area lmtd is the. Recommended steps fix the inletoutlet temperature values calculate lmtd select a shell and tube heat exchanger tema tube decide on shell and tube geometry calculate heat transfer area based on selected geometry a overall get the overall heat transfer coefficient u using a suitable empirical. The mean rate of continuous heat transfer is the mean heat transfer rate. Calculate the heat duty of heat exchanger heat transfer using information of fluid in tube side.