Performance evaluation of solar air heater equipped with louvered fins

Chand, Subhash; Chand, Prabha

doi:10.18280/ijht.360241

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…The thermal efficiency increased from 38.6% to 75.5% using fins with a fin length of 10 cm, and the space between two consecutive staggered rows was 2.5 cm. Similar results were found by [52][53][54] that the thermal performance was enhanced by decreasing fin spacing. Bahrehmand and Ameri [55] found that tin metal sheet (TMS) with fins had higher energy and exergy efficiency at a low channel depth compared to collector with fins and without TMS.…”

Section: Absorber With Fins/ribssupporting

confidence: 86%

“…It was observed that the mass flow rate should not exceed 0.05 kg/s since the pressure drop dominates the positive effect of increased thermal efficiency at high mass flow rates. Chand and Chand [52] found that the thermal efficiency and outlet air temperature were enhanced by decreasing louvered fin spacing. Effective efficiency was raised up to an optimum mass flow rate.…”

Section: Geometry Of Fins/ribsmentioning

confidence: 99%

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A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

Hassan,

Nikbakht,

Fawzia

et al. 2024

Energies

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Supply disruptions, uncertainty, and unprecedented price rises of fossil fuels due to the recent pandemic and war have highlighted the importance of using renewable sources to meet energy demands. Solar air collectors (SACs) are major types of solar energy systems that can be utilized for space and water heating, drying, and thermal energy storage. Although there is sufficient documentation on the thermal analyses of SACs, no comprehensive reviews of the exergetic performance or qualitative insight on heat conversion are available. The primary objective of this article is to provide a comprehensive review on the optimum conditions at which the thermal performance of diverse types of solar air collectors is optimized. The effect of operating parameters such as temperature rise, flow rate, geometric parameters, solar radiation, and the Reynolds number on the thermal performance of SACs in terms of thermal hydraulic performance, energy, and exergy efficiencies has been reviewed adaptively. Beyond the operating parameters, a deep investigation is outlined to monitor fluid dynamics using analytical and computational fluid dynamics (CFDs) methodologies in the technology of SACs. In the third phase, thermodynamic irreversibility due to optical losses, thermal losses between absorber and environment, heat losses due to insulation, edge losses, and entropy generation are reported and discussed, which serve as the fundamental tools for optimization purposes.

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Section: Absorber With Fins/ribssupporting

confidence: 86%

Section: Geometry Of Fins/ribsmentioning

confidence: 99%

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

Hassan,

Nikbakht,

Fawzia

et al. 2024

Energies

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“…Alternatively, increasing the thickness of insulation had no significant effect on the exergy efficiency. Chand and Chand [3] investigated a thermal performance of LFSAH. The study revealed that the thermal performance of LFSAH shows a noticeable enhancement with minimum fin spacing and fin height.…”

Section: Introductionmentioning

confidence: 99%

Effects of Louvered Parameters on Exergetic Performance of Louvered Finned Solar Air Heater

Chand¹,

Chand²

2021

IJHT

Self Cite

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The aim of the present study to improve the performance of solar air heater because of low thermo-physical properties of air. In the current work, an attempt has been made to improve the performance of the heater by employing louvered fins to the absorber plate, as it not only enhances heat transfer coefficient but also improve heat transfer area. The effect of exergy performance on the geometrical parameters of louvered fin i.e., louvered angle, louvered pitch and louvered length has been studied and analyzed. The results are compared to plane solar air heater (PSAH) to evaluate the effectiveness of louvered finned solar air heater (LFSAH). The exergy efficiency of LFSAH is comparatively higher for all the operating conditions except for higher mass flow rate where it may even go below that of PSAH; possibly due to the higher pressure drop and more loss of exergy at high mass flow rate. In addition, the results conclude that for louvered parameters viz., louvered angle 20°, fin pitch to louvered pitch ratio 0.75 and louvered length to louvered pitch ratio 1.25, high exergy performance of SAH is obtained as compared to other louvered parameter values.

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“…Because at a temperature of t 1 =80°C, an increase in t 2 to 55°C (during the period of a constant drying rate) occurs up to 90 ° C (at the end of the drying process, η will decrease from 0.41 to 0.25), which is 39%. [16][17][18][19][20][21] The efficiency of the solar air heater the efficiency of a solar air heater is determined using the following formula:…”

mentioning

confidence: 99%

Investigation of the use of new solar air heaters for drying agricultural products

2021

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This article discusses the study of energy-saving technologies that have become a topical issue today. Types of solar heating collectors, the principles of operation, and their constructive structure were studied. A new technology developed based on the analyses proposed to dry the agricultural products. Also, in the current presentation, the technologies used in the context of the technologies and the reduction issues and technologies have been considered. Experimental experiments are also provided based on the proposed technology in seasonal (spring, summer, autumn, winter). In the study case, the operation principle of the operation of a flat surface air heater is studied. The article provides the basics of twice the shortening of air canals to a common full-length sunny air heater. The study learned the issues of reducing the local resistance ratio of the device concerning a common full-wide air heater. Raise the temperature of the sun's agents discussed in the article; reduction issues are analyzed.

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Performance evaluation of solar air heater equipped with louvered fins

Cited by 6 publications

References 18 publications

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

Effects of Louvered Parameters on Exergetic Performance of Louvered Finned Solar Air Heater

Investigation of the use of new solar air heaters for drying agricultural products

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