Experimental Analysis of Novel Triple Fluid Heat Exchanger for Hybrid Cooling Application

This papers focuses on experimental analysis of novel Triple Fluid Heat Exchanger (TFHEX) to manage heat from hybrid cooled servers. TFHEX is a finned double tubed heat exchanger that consists of two types of liquid (hot water and warm water) and one gas (hot air). The hot air flows through the fins and the hot water flows through the inner tube. The cooling water that flows through the annular tube removes heat from both hot air and hot water. The prototype model of TFHEX is tested in wind tunnel at different heat load. The heat load is varied by varying the flow rate at a given inlet fluid temperature. The overall performance of the heat exchanger is presented in terms of heat transfer efficiency over the flow rate. The experimental results were also compared with analytical results. While there is some deviation between analytical and experimental results, the results promises that TFHEX can dissipate heat from different fluids at various ratio which necessary customization and this heat exchanger suitable for high ambient data center application.