Sustainability

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Energy Conversion and Sustainability

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Dear Colleagues,

In recent decades, environmental sustainability has been attracting researchers and the industry to reduce carbon emissions and fossil fuel pollutions by considering renewable energy sources such as solar energy. One of the critical factors of having a sustainable society rests in energy conversion methods. Clean energy production, off-grid accessibility, and easy energy delivery are essential for sustainable energy conversion.

In this Special Issue, we aim to present up-to-date and high-quality research on energy harvesting and conversion sustainability. The focus will be on state-of-the-art approaches and methodologies of design, development, and the performance enhancement of various clean energy sources. The key topics are as follows:

Energy management;
Energy harvesting;
Sustainable energy development;
Co-gen and tri-generation;
Ground source heat pumps;
Zero-energy building;
Heat recovery and innovative HVAC systems;
Energy efficiency;
Renewable energy;
Building simulation;
Sensible and latent heat storage;
Thermal energy storage.

Dr. Erdem Cuce
Dr. Reza Daneshazarian
Guest Editors

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Research

18 pages, 6819 KiB

Open AccessArticle

Assessment of the Thermo-Hydraulic Efficiency of an Indoor-Designed Jet Impingement Solar Thermal Collector Roughened with Single Discrete Arc-Shaped Ribs

by Raj Kumar, Erdem Cuce, Sushil Kumar, Sashank Thapa, Paras Gupta, Bhaskar Goel, C. Ahamed Saleel and Saboor Shaik

Sustainability 2022, 14(6), 3527; https://doi.org/10.3390/su14063527 - 17 Mar 2022

Cited by 25 | Viewed by 2247

Abstract

This study illustrates the impact of single discrete arc-shaped ribs (SDASR)-type artificial roughness on the performance of a jet impingement solar thermal collector (JISTC). The impact of parametric variations of SDASR on the Nusselt number

(N u_{s d r})

, [...] Read more.

(N u_{s d r})

, friction factor

(f_{s d r})

, and thermohydraulic performance

(η_{s d r})

is examined. The spacer length (

S_{s d r}

) of the SDASR was changed from 0 mm to 300 mm in stages of 100 mm during the experiment. The fixed parameters of the SDASR were a relative discrete distance

(D_{d} / L_{v})

of 0.67, relative discrete width

(g_{w} / H_{r})

of 0.87, relative rib height

(H_{r} / H)

of 0.047, relative rib pitch

(P_{r} / H)

of 1.7, angle of an arc

(α_{s d r})

of 60°, jet diameter ratio

(D_{j} / D_{h y})

of 0.065, streamwise pitch ratio

(X / D_{h y})

of 1.72, and spanwise pitch ratio

(Y / D_{h y})

of 0.82. The Reynolds number

(R e)

was altered from 3000 to 19,000. The

N u_{s d r}

and

f_{s d r}

of a JISTC with a roughened absorber plate was found to be enhanced by 5.25 and 5.98 times as compared to an STC without artificial roughness. The optimal findings of

N u_{s d r}

f_{s d r},

and

η_{s d r}

were achieved at

S_{s d r}

= 0 mm. The maximum value of the

η_{s d r}

obtained at

S_{s d r}

= 0 mm was 2.9. Full article

(This article belongs to the Special Issue Energy Conversion and Sustainability)

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