Performance Augmentation of Solar Air Heater for Space Heating Using a Flexible Flapping Guide Winglet

doi:10.5829/ijee.2021.12.02.09

Cited by 4 publications

(3 citation statements)

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“…The world's energy consumption is outpacing the world's installed generation capacity. Energy demand should be met and developed in a safe, efficient manner to meet future energy needs [13]. Energy-related CO2 emissions account for two-thirds of total greenhouse gas emissions (GHG).…”

Section: Literature Reviewmentioning

confidence: 99%

Floating Solar Power Plants: A Way to Improve Environmental and Operational Flexibility

Shayan

Hojati²

2021

IJEE

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The Photovoltaic modules installed on the surface of the water are naturally cooled, reducing the loss of thermal power generation. Floating photovoltaic systems (FPVS) combine existing photovoltaic systems with a floating structure to generate clean energy. To meet the growing electricity demand, FPV systems will be integrated alongside existing dams to enhance existing power sources. The results indicate that the investment toward installing FPV systems over the dams' reservoirs leads to a significant improvement in the overall system reliability minimizes load curtailment, and could potentially add more flexibility to the operator to dispatch power generated by hydropower plants during peak demands. The execution of the Karun-4 FPV power plant with an annual production of 16758969 kWh of energy has reduced the water evaporation of the dam's reservoir water and after eight years and four months, the investment cost was returned and its nominal performance is 81.7 percent. Adding a floating solar power plant with 10% of the lake reservoir cover of six dams saves 70.7 million cubic meters of water per year. This amount of fresh water is enough to meet the annual needs of one million people.

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Section: Literature Reviewmentioning

confidence: 99%

Floating Solar Power Plants: A Way to Improve Environmental and Operational Flexibility

Shayan

Hojati²

2021

IJEE

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“…Solar air heaters (SAHs) are a simple, cheap technique widely utilized for heating applications in residential, agricultural, and industries [2,3]. However, this technique has a main drawback: the convection mechanism is weak in SAHs [4,5]. This issue causes the thermal efficiency of SAHs to reduce significantly, and they were categorized as low-temperature heat sources [6].…”

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confidence: 99%

Performance Analysis of a Novel Cross-flow Solar Air Heater with Square Perforated Absorber Plate: An Experimental Study

Farzan,

Abouee-Mehrizi,

Khazali

2023

IJEE

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The current study introduces and analyzes a novel square cross-flow perforated solar air heater (SAH). Since the convection mechanism in SAHs is weak, numerous methods have been suggested to address this problem and improve thermal efficiency. Perforations and cross-flow configuration generate high turbulency and, consequently, high convection rate resulted. Hence these methods have been applied to enhance thermal efficiency. To achieve this goal, an experimental setup was fabricated and tested at outdoor conditions for two air mass flow rates (mair) of 0.015 kg/s and 0.03 kg/s while several sensors monitored the collector's heat dynamics and ambient conditions. The obtained results illustrate that outlet temperature reaches the peak values of 38 o C and 34 o C, which is only 6 o C and 7 o C lower than the maximum absorber temperature. This crucial issue proves a high heat exchange rate in the fabricated SAH that causes the absorber temperature to approach the outlet temperature due to high turbulency. The strong convection mechanism in the fabricated SAH improves daily thermal efficiency, in which its value reaches nearly 78.6% for the mass flow rate of 0.03 kg/s. In conclusion, the square cross-flow perforated SAH is an economy, applicable, compact collector, ensuring high thermal efficiency.

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“…13 Solar energy is the most affordable renewable energy that has been extensively used to produce green thermal *Corresponding Author Email: hadi.farzan@bam.ac.ir (H. Farzan) energy. Numerous techniques have been introduced to harvest solar thermal energy, and SAHs are the most affordable and simple collectors among these techniques [1,2]. These collectors utilize varieties of heat absorbers to accumulate incoming solar energy.…”

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confidence: 99%

Performance of New Absorber Coating Strategy in Solar Air Heaters: An Experimental Case Study

Mahmoudi

Farzan

Zaim

2022

IJEE

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Asphalt materials commonly have high absorption coefficients, and their surface temperature reaches as high as 80 o C during daytime hours since their surfaces are exposed to solar radiation for long periods. Hence, asphalt pavements can easily be converted to solar air heaters (SAHs) to collect solar energy. Even though asphalt materials have low thermal conductivity, resulting in a weak convection heat exchange rate between the flowing air and asphalt surface. The current experimental study analyzes utilizing aluminum shavings as asphalt coating materials to improve SAHs' thermal performance. To this aim, a serpentine SAH prototype was constructed, and several sensors were utilized to monitor its dynamic thermal response. Black-painted aluminum shavings were utilized as coating materials to improve the convective heat exchange rate and increase the roughness of the absorber surface. Two scenarios were considered, including the uncoated absorber plate and coated one with 0.2 kg aluminum shavings. The experiments were carried out for two air mass flow rates of 0.02 kg/s and 0.03 kg/s under field conditions. Based on the air mass flow rate, the coated absorber reaches higher temperatures, approximately 5 o C to 9 o C, than the uncoated one. The acquired results illustrate that the coated SAH has nearly 4 o C to 5 o C higher maximum exhaust air temperature; hence, the coating strategy improves the thermal efficiency by 24.75% and 44% in two air mass flow rates of 0.02 kg/s and 0.03 kg/s, respectively.

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Performance Augmentation of Solar Air Heater for Space Heating Using a Flexible Flapping Guide Winglet

Cited by 4 publications

References 24 publications

Floating Solar Power Plants: A Way to Improve Environmental and Operational Flexibility

Floating Solar Power Plants: A Way to Improve Environmental and Operational Flexibility

Performance Analysis of a Novel Cross-flow Solar Air Heater with Square Perforated Absorber Plate: An Experimental Study

Performance of New Absorber Coating Strategy in Solar Air Heaters: An Experimental Case Study

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