Testing of a new solar coating for solar water heating applications

AlShamaileh, Ehab

doi:10.1016/j.solener.2010.06.003

Cited by 54 publications

(24 citation statements)

References 27 publications

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“…Therefore, a storage system should be devised in order to gather solar energy when it is available for further consumption. [10][11][12][13][14] Heat transfer performance can be enhanced through active and passive approaches. 7 Hence, the flatplate solar water heater (FPSWH) was developed and used as a direct utilization of solar energy for water heating purposes.…”

Section: Introductionmentioning

confidence: 99%

Smart modeling by using artificial intelligent techniques on thermal performance of flat‐plate solar collector using nanofluid

Sadeghzadeh

Ahmadi

Kahani

et al. 2019

Energy Science & Engineering

106

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In the current study, Multilayer Perceptron Artificial Neural Network (MLP‐ANN) mode, Radial Basis Function Artificial Neural Network (RBF‐ANN), and Elman Back Propagation Neural Network (Elamn BP‐ANN) are developed to predict the thermal efficiency of a flat‐plate solar collector. TiO2 (20 nm)/water nanofluids are prepared using two‐step method and used in the designed solar system. All experiments are done in Mashhad city, Iran (Longitude/Latitude: 36.2605°N, 59.6168°E), according to EUROPEAN STANDARD EN 12975‐2 as a quasi‐dynamic test (QDT) method, and the solar collector is exposed to the south with the tilt angle of 55°. Three levels of inlet temperature (ambient air temperature, 52 and 74°C), 3 levels of volumetric flow rate (36, 72, and 108 L/(m2.h)), and 4 levels of nanofluid concentrations (0, 0.1, 0.2, and 0.3 wt.%) are considered as the input data, and the thermal efficiency of the solar system is calculated. According to the output results of developed models, the best prediction of thermal performance is obtained by MLP‐ANN model, although other generated models are also able to predict the efficiency of the solar collector with appropriated accuracy.

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Section: Introductionmentioning

confidence: 99%

Smart modeling by using artificial intelligent techniques on thermal performance of flat‐plate solar collector using nanofluid

Sadeghzadeh

Ahmadi

Kahani

et al. 2019

Energy Science & Engineering

106

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“…They can be divided into thickness-insensitive, spectrally selective, [6][7][8][9][10] and thickness-sensitive, spectrally selective (TSSS) paints. 11 The development of both types is interlinked in the fields of absorptive pigments and their dispersions, 12 binders, 13 and durability.…”

Section: Introductionmentioning

confidence: 99%

The Impact of a Silane Pigment Treatment on the Properties of Thickness-sensitive Spectrally Selective Paints

Steinbücher

Venturini

Hafner

et al. 2017

ACSi

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Thickness-sensitive, spectrally selective paints based on a silane treatment of pigments were prepared with different pigment-volume concentrations. The critical pigment-volume concentration was determined by means of electrochemical impedance spectroscopy, while the pigment particle size distribution was determined with ultrasound spectroscopy. The selectivity versus thickness relation of a paint with a near-critical pigment-volume concentration was studied spectroscopically through performance criteria. Its nonlinearity was shown to be related to the surface topography. This relation was further supported by hydrophobicity measurements. Heat-gathering tests in a simulated solar collector supported the spectroscopic determination of an optimal dry-film thickness.

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“…An affordable solar selective coating to improve the solar absorption efficiency was reported in [6]. It was shown that this coating could increase the tank water temperature by an extra 5 C as compared to the temperature obtained using a commercial black paint coating.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of forced and wind assisted domestic solar hot water systems

Ramasamy¹,

Srinivasan²

2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper investigates a proposal to replace the electrically operated pump of a forced circulation solar hot water system with a windmill-driven pump. A two-stage centrifugal pump driven by a vertical axis windmill with a Savonius type rotor is added to the fluid loop. Tests on the forced circulation system (FCS) mode, with two different pump speeds, driven by an electrically operated pump or in wind-assisted system (WAS) mode were carried out during January, April, July, and October 2009. Test results obtained on clear days are reported. A daily average thermal efficiency level of between 30 and 37 per cent was obtained in FCS mode and it was between 31 and 36 per cent in WAS mode. With higher wind velocities, higher collector flow rates and higher efficiencies are obtained. In general, the performance of a domestic hot water system operating in WAS mode is on a par with that obtained in FCS mode. The WAS mode is a viable alternative to FCS mode in remote areas where the supply of electricity is problematic.

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Testing of a new solar coating for solar water heating applications

Cited by 54 publications

References 27 publications

Smart modeling by using artificial intelligent techniques on thermal performance of flat‐plate solar collector using nanofluid

Smart modeling by using artificial intelligent techniques on thermal performance of flat‐plate solar collector using nanofluid

The Impact of a Silane Pigment Treatment on the Properties of Thickness-sensitive Spectrally Selective Paints

Experimental investigation of forced and wind assisted domestic solar hot water systems

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