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Thermal Performance of a Wall Heat Collection Prototype with Al2O3+BN/H2O Nanofluid

Author(s):

Vivek S Pandey , Padmabhooshan Vasantdada Patil Institute of Technology, Pune.; Dhananjay P Kumbhar, Padmabhooshan Vasantdada Patil Institute of Technology, Pune; Nitin A Khedkar, Padmabhooshan Vasantdada Patil Institute of Technology, Pune

Keywords:

BN/H2O, 100 LPH

Abstract

In this experimental study, we have attempted to combine the curtain wall structures, building construction practices, heat transfer mechanisms, and a natural circulation loop designed to develop an innovative, wall-integrated solar heater using Al2O3 + Boron nitride/water (BN/H2O) nanofluid on the concept of an “energy-harvesting” façade. A nanofluid is a dilute suspension of nanometer-size particles and fibers dispersed in a liquid. As a result, when compared to the base fluid, changes in physical properties of such mixtures occur, e.g., viscosity, density, and thermal conductivity of all the physical properties of nanofluids, the thermal conductivity is the most complex and for many applications the most important one. Interestingly, experimental findings have been controversial and theories do not fully explain the mechanisms of elevated thermal conductivity. In this paper, experimental and theoretical studies are reviewed for collector efficiency using nanofluid thermal conductivity and convection heat transfer enhancement. This work accomplished by performing an experimental investigation using two different types working fluid, water and Al2O3 + BN/ water nanofluid with 2%, 4%, 6% of volume fraction of nanopowder by varying the flow rates of the fluid. For this combination of working fluid the efficiency of system is found, 41.64%, 48.79%, and 55.82% respectively. The flow rates are 25LPH, 50LPH, 75LPH and 100 LPH. The highest values of efficiency are found at 100 LPH.

Other Details

Paper ID: IJSRDV3I30004
Published in: Volume : 3, Issue : 3
Publication Date: 01/06/2015
Page(s): 3396-3401

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