ANALYSIS OF HEAT FLOW IN DOUBLE-PIPE HEAT EXCHANGER WITH NANO-FLUID

This communication containss of a simplified model of a counter flow double-pipe type heat exchanger with known dimensions. The Mat lab code was used in the modelling of the fluid flow both with and without using Nano-particles. The heat transfers during the flow of the working fluid containing water as a base fluid and dispersed aluminum oxide particles with an approximate 20nm diameter size under turbulent flow conditions was studied based on Matlab software simulation. In parliamentary law, to obtain the results for using Nano-fluid on the studied model, a comparison was made with a model study on water only as a working fluid. Using the partial differential equation, which covered the system behavior under environmental conditions, the system was modeled, and the outlet temperature distribution, total heat transfer, and steady state time of the heat exchange was determined depending on the energy balance. The input parameters such as the inlet temperature and the speed of the working fluid were assumed as known parameters in the initial state conditions. The results obtained revealed an improvement in the model performance by using Nanofluid as a working fluid. There was an approximate26 % increase in the total heat transfer, about an 80% reduction in Exergy destroyed due to the reduction in the entropy generation, and near to 11% increase in the effectiveness of this model under the study. The modelling of this system and anticipated effects are extremely important in the preliminary stage of the heat exchange device and equivalent system design