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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

DETERMINATION OF THE EFFECT OF DIFFERENT INLET AND OUTLET WATER CIRCULATION TEMPERATURES ON THE FLOW FIELD AROUND A PANEL RADIATOR USING PIV

Tamer Calisir
Department of Mechanical Engineering, Gazi University, Eti Mah. Yukselis Sok. 5, 06570 Ankara, Turkey

Senol Baskaya
Department of Mechanical Engineering, Gazi University, Eti Mah. Yukselis Sok. 5, 06570 Ankara, Turkey

Hakan Onur Yazar
DemirDokum A.S., R&D Department, Eskisehir, Turkey

Sinan Yucedag
DemirDokum A.S., R&D Department, Eskisehir, Turkey

Abstract

Airflow around panel radiators heated by circulation water is a very significant factor on the heat output and energy efficiency of radiators. In this study, flow field around a presently manufactured panel radiator was determined experimentally using particle image velocimetry (PIV), and numerically using the FloEFD CFD code. Investigations were performed under controlled laboratory conditions. Same conditions were implemented in the CFD code. Experiments and simulations were performed for water inlet/outlet temperatures of 55/45°C, 75/65°C and 90/70°C, and measurements were performed at different sections of the radiator. Numerical results were verified with the PIV measurement results, and a good agreement was achieved. It was observed that the flow is mainly vertical, and in the upward direction. At a certain height the flow sticks to the wall at all temperature values. It was also observed that the velocity values change with the measured location, which is due to the non-uniform temperature distribution on the panel radiator.

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