LOCAL HEAT-TRANSFER IN SHELLSIDE OF TUBE BUNDLE WITH LONGITUDINAL FLOW

Experimental gas flow investigations are presented, especially in hydr odynamical transition regime. Measurement technique is a mass transfer method (ammonia-absorption) with digital local analysis of measuring informations. The experimental tube bundle contains particular support baffles with slots for fluid flow. Flow rate and geometry or space of the support baffle were varied in the experiments. Profils of local h eat transfer coefficients are discussed in main flow direction and in direction of tubular circumference. The influence of tube pitch on the intensity of heat transfer was showed, in witch the square pitch in a dvantageous. A thermo-hydraulic comparison with usual tube bundle exch anger allows conclusion on preferences in more turbulent regime.