Exergy Optimization of a Double-Exposure Solar Cooker by Response Surface Method

Hossein, Zamani; Mahian, Omid; Rashidi, Iman; Lorenzini, Giulio

doi:10.1115/1.4034340

“…Other modifications include mirrors added to solar cookers to concentrate more radiation. Focus being on the effect of their configuration such as varied tilt angle, length-to-width ratios (Zamani et al 2016). improved the performance of a box cooker by adding flat mirrors on both sides.…”

Section: Design / Vessel Geometrymentioning

confidence: 99%

Advances in Solar Cooking in Developing Countries - A Review

Nyaanga¹,

N.²,

O.³

2021

JEAE

0

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Increased energy demand has forced societies to rely on traditional fuel sources with negative health and environmental impacts. In most developing countries, solar energy is available for long hours and in ranges that if exploited can reduce dependence on biomass and fossil fuels. However, despite its potential, uptake of solar cooking devices is low due to intermittent radiation, technological challenges, lack of awareness and slower cooking rates compared to other energy sources. There are four traditional types of solar cookers, box, panel, parabolic and tube. The latest technology is the PV conversion to electricity. Since the advent of solar cooking, numerous experiments, designs and improvements of solar cookers have been successfully developed. Research has focused on improving solar cooker performance such as; improved design, sun tracking mechanisms, solar thermal storage or "hybrid" designs that remove limitation of nighttime cooking or periods of poor irradiance. These improvements have increased the efficiency, reduce the cost of the solar cookers, and addressed sociocultural challenges such as sheltered cooking, visual appearance, and the ability to cook traditional recipes. However, more needs to be done to increase ease of adoption, the capacity of energy storage and flexibility. The cost of domestic workloads and environmental degradation should also be a factor in energy policy formulation.

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“…had a higher efficiency. When they added surfactant to their trials, they saw a 15.63% improvement [14,15], and the references therein include examples of nanoparticles in solar energy applications.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Natural Convection in Nanofluid Flow through a Channel with Source/Sink Effect

Siddique

¹

,

Sadiq

²

,

Jarad

³

et al. 2022

Journal of Nanomaterials

2

0

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In this study, the natural convection nanofluids flow through a channel formed by two vertical parallel plates having distance d between them has been examined under the influence of the ramped velocity. Sodium alginate is considered as base fluid, and nanoparticles of titania ( TiO 2 ) and alumina ( Al 2 O 3 ) are added to it. Analytical and semianalytical results for temperature and velocity profiles are obtained with Laplace transform and inverse Laplace algorithms (Tzou, Stehfest, Talbot, Honig and Hirdes, and Fourier series), respectively. Furthermore, the impacts of nanoparticles, Prendtl number, heat absorption, and time on velocity and temperature are drawn graphically and discussed. The outcomes show that the high thermal conductivity of particles increases the temperatures, and the high density of particles decreases the velocities of the nanofluids. The current findings are compared to previous findings in the literature. In the tables, the effect of volume fraction on Nusselt numbers and skin frictions is explored.

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“…32 The parametric optimization of SBC has been done using Cramer's rule. 33 The exergy efficiency optimization of double exposure solar cooker using response surface method (RSM) was performed by Zamani et al 34…”

Section: Introductionmentioning

confidence: 99%

“…32 The parametric optimization of SBC has been done using Cramer's rule. 33 The exergy efficiency optimization of double exposure solar cooker using response surface method (RSM) was performed by Zamani et al 34 Recent studies show the advancements and enhanced performance of SBCs. Siddique et al 35 fabricated and experimentally assessed the performance of combined solar cooker cum dryer.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance assessment of a cylindrical box solar cooker fitted with decahedron outer reflector

Anilkumar

¹

,

Maniyeri

²

,

Anish

³

2021

Energy & Environment

4

0

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One of the important issues humankind globally faces in recent years is the scarcity of non-renewable energy resources. Solar energy is considered safe and renewable, which can fulfil the demand and supply chain requirements. Solar box cookers (SBCs) are popular in domestic cooking due to their ease of use and handling. The prime objective of the present work is to develop and test the performance of a cylindrical SBC fitted with decahedron-shaped reflector (CSBC-FDR). The CSBC is designed using minimum entropy generation (MEG) method. Through experiments, we observed that absorber plate attains peak temperature of about 138°C–150°C with the aid of decahedron reflector. The first figure of merit (F1) is found to be 0.13, indicating better optical efficiency and low heat loss coefficient for the SBC. The second figure of merit (F2) is obtained as 0.39, which indicates good heat exchange efficiency (F') and less heat capacity for cooker's interior. The average energy efficiency, exergy efficiency, and standardized cooking power values are 21.93%, 3.04%, and 25.28W, respectively. These results show that the present CSBC-FDR is able to cook food in a shorter period with better efficiency. The experimental and numerical values of overall heat loss coefficient of the developed SBC are in close agreement. The experimentally assessed performance parameters reveal superior performance of the present cylindrical SBC in comparison with many conventional rectangular and trapezoidal box solar cookers.

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Exergy Optimization of a Double-Exposure Solar Cooker by Response Surface Method

Cited by 11 publications

References 23 publications

Advances in Solar Cooking in Developing Countries - A Review

Advances in Solar Cooking in Developing Countries - A Review

Analysis of Natural Convection in Nanofluid Flow through a Channel with Source/Sink Effect

Thermal performance assessment of a cylindrical box solar cooker fitted with decahedron outer reflector

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