influence of tube arrangement on the thermal performance of indirect water bath heaters

natural convection heat transfer from a tube bundle in the indirect water bath heaters is investigated. a computer-code is used for the solution of the governing equations of mass, momentum and energy transfer based on the simple-c algorithm. simulations are carried out for the gas pressure station heater of kermanshah city with various tube bundle arrangements. in order to validate the numerical code, results of the simulation compared with experimental data which measured from this heater. effects of the tube bundle arrangement on heat transfer are presented. it is observed that changing the tube bundle arrangement (horizontal and vertical pitch) can affect the rate of heat transfer. in other word it can lead to increase the thermal performance of the indirect water bath heater. finally, based on this framework it is suggested that the optimum arrangement of tube bundle can lead to the maximum heat transfer. hence the performance enhances to 5.27%.