Thermal and hydraulic efficiency of the staggered tube bundle in pulsating flow

Determination of the thermal and hydraulic efficiency η is one of the ways to assess the effectiveness of the method used to intensify heat transfer. In this paper, the hydraulic fluid efficiency of diamond-coated tube bundles is determined for a pulsating flow of a heat carrier. The Reynolds number was based on the outer diameter of the pipe and was Re = 100, the Prandtl number Pr ranged from 214 to 363. It was shown that an increase in the dimensionless amplitude β, frequency f, and pulsating ratio ψ leads to a decrease in thermal and hydraulic efficiency. The influence of the Prandtl Pr numbers on the thermohydraulic efficiency was also analyzed. It is shown that an increase in thermal and hydraulic efficiency is observed with increasing Pr. (paper)