Abstract
Abstract In the recent years, a lot of research has been carried out in the field of nanofluid based solar collector, leading towards the enhancement of working efficiency even at low atmospheric temperature or at low sunlight levels regions of the world. The present review pertains to the research progress related to the performance execution of solar collector using nanofluid. It is observed that the thermal energy storage system (TES), using solar collector, is a useful device for storing sensible and latent heat in a unit volume. Nanofluid plays an important role in various thermal applications such as heat exchanger, solar power generation, automotive industries, electronic cooling system, etc. The nanoparticles find the use in various industrial applications because of its properties, such as thermal, mechanical, optical and electrical. Most of the investigations carried out earlier on the applications of nanofluid in solar energy are related to their uses in the solar collector and thermal storage system. The parabolic solar collector using nanofluid is still a challenge. This article presents an exhaustive review of thermal storage system using nanofluid based solar collector and a scope of using nanofluid based solar collector for performance enhancement.
Highlights
Solar energy is the most populous form of energy due to its green and environmentally friendly nature
The experimental investigation using Al2O3/water nanofluid showed that efficiency of flat plate solar collector increased up to 28.3 % by using 0.2 wt% nanofluid as absorption medium as compared with water [9]
The phase change materials for latent heat storage system using nanofluid as working medium is much more effective method to store the solar energy through a solar collector
Summary
Solar energy is the most populous form of energy due to its green and environmentally friendly nature. The nanofluids improve the heat transfer rate, thermal properties, optical properties, efficiency, extinction coefficients and transmission of solar systems as compared to conventional fluids [6]. Said et al [8] investigated the effect of TiO2 nanofluid and polyethylene glycol on flat plate solar collector. They varied mass flow rate in the range of 0.0083 to 0.025 kg/s, and recorded 76.6 % increase in efficiency for 0.1 % volume fraction and 0.0083 kg/sec flow rate. The experimental investigation using Al2O3/water nanofluid showed that efficiency of flat plate solar collector increased up to 28.3 % by using 0.2 wt% nanofluid as absorption medium as compared with water [9]. From the above discussion on the nanofluid based solar system can be started from the basic information of nanofluid which is discussed
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