Abstract
Experimental study on using nanofluid in a cross-flow minichannel heat exchanger (MICHX) to investigate its transient behavior was completed. Step changes of temperature and flow rate in the hot liquid were applied and the dynamic performance of the heat exchanger was analyzed. Results of nanofluid were compared to water and demonstrate an enhancement of 19% in heat transfer when using 2.5 wt% concentration Al2O3/water nanofluid. Parameters such as the transient effectiveness, heat balance, response time, and outlet temperatures of both liquid and air were also studied. The empirical correlations are developed for the temperature and mass flow step variations in a MICHX to predict the hot fluid outlet temperature in the dimensionless parameters. Nanofluid showed shorter response time for temperature and mass flow step changes compared to water. The outcome of this work is of interest to designers for process control, thermal testing, characterization, and performance enhancement of compact heat exchangers.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call