Ricerc@Sapienza

The aim of this work the analysis of compact branched heat exchangers, by measuring thermal efficiency and the pressure drop in several experimental tests. Three different heat exchanger configuration have been considered. In the first device, the constant efflux velocity, in the internal channels, was imposed. The second exchanger was realized by imposing constant the value of the Reynolds number. The last device was created according to the instructions of the constructal theory. All three exchangers are aluminum made.

The aim of this work is to continue the experimental evaluation of three different compact branched heat exchangers. To complete the previous study, additional experimental tests were carried out, using a commercial automotive refrigerant (Glycol) at different concentrations (50%, 100%). Finally, in order to have a deeper knowledge of this phenomenon and to identify the parameters regulating the heat transfer, an organic fluid has also been used and tested. The use of such a fluid has required a re-elaboration and design of the test bench.