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Heat transfer and pressure drop characteristics of the silicone-based plate heat exchanger

Muszyński Tomasz, Andrzejczyk Rafał, Park Il Wong, Dorao Carlos Alberto

Archives of Thermodynamics

2019

Vol. 40, no 1

127--143

The paper presents an experimental investigation of a silicone based heat exchanger, with passive heat transfer intensification by means of surface enhancement. The main objective of this paper was to experimentally investigate the performance of a heat exchanger module with the enhanced surface. Heat transfer in the test section has been examined and described with precise measurements of thermal and flow conditions. Reported tests were conducted under steady-state conditions for single-phase liquid cooling. Proposed surface modification increases heat flux by over 60%. Gathered data presented, along with analytical solutions and numerical simulation allow the rational design of heat transfer devices.

Horizontal flow boiling of R22, R134a and their mixtures with oil in smooth and enhanced tubes

Cieśliński J., Targański W.

Archives of Thermodynamics

2007

Vol. 28, no. 2

19-40

The experimental stand and procedure for flow boiling investigations are described. Experimental data for pure R 22, R134a and their mixtures with oil in two smooth tubes and two enhanced tubes are also presented. The performance benefits of the micro-fin tube and corrugated tube are quantified and discussed. During tests inlet vapour quality was set 0[plus-minus]0,05 and outlet quality 0,7[plus-mines]0,01. Mass flux density varied from about 250 to 500 kg/m[^2]s. The experiments have been conducted for average saturation temperature 0[degrees]C. The ability of selected models to predict the boiling heat transfer coefficient is evaluated by comparison with the experimental data obtained in smooth tubes for pure R 22 and R134a.