Energy and exergy analysis of wavy plate solar air collector using a novel hybrid expert system

Reddy, Jagannath; Debnath, Suman; Das, Biplab; Jagadish, Jagadish

doi:10.1007/s40430-019-1901-x

Cited by 13 publications

(5 citation statements)

References 32 publications

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“…The wavy absorber plate significantly improved SAC performance by 14% relative to the flat-plate SAC. Similar studies of Sevik and Abuska, 34 Reddy et al, 35 Kabeel et al 36 and Debnath et al, 37 Reddy et al, 38 Debnath et al, 39 Dhiman et al 40 have also shown the similar approaches to enhance the performance of conventional SAC. Table 1 displays the details of design parameters and outcomes of literature work.…”

supporting

confidence: 61%

“…The pertinent literature 1‐41 reveals many attempts have been made in past to improve SAC efficiency using various methods such as varying the number of glazing; changing the air gap; using different absorber plate materials; and modifying the absorber surface by incorporating selective coatings, fixing fins, or adding vortex generators. Furthermore, it has been observed that the performances of SACs with similar design configurations could be different.…”

Section: Introductionmentioning

confidence: 99%

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Energy and exergy analysis of a trapezoidal absorber plate‐based solar air collector

Reddy

Jagadish

Negi

et al. 2022

Energy Science & Engineering

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Global interest in decreasing CO 2 emissions and depletion of fossil fuel assets has pushed the industrial sector to use more solar energy due to its abundance and clean nature. Presently, solar air collectors (SACs) are commonly employed to absorb and convert radiant energy into useful heat energy (i.e., warm air) for drying farm crops, space heating, etc. Typically, black-coated absorber plates are preferred for SACs as they help to transfer valuable heat to air flowing over the absorber plate in natural or forced convection mode. SAC can perform at a higher operating

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supporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Energy and exergy analysis of a trapezoidal absorber plate‐based solar air collector

Reddy

Jagadish

Negi

et al. 2022

Energy Science & Engineering

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“…Likewise, the friction factor was 4.247‐folds higher, at similar boundaries and Re = 3800. Reddy et al 12 experimented with a novel hybrid expert tool to evaluate energy and exergy analysis of wavy plate SAH. At a mass flow rate of 0.00785 kg/s, the investigators found that the maximum thermal and exergy efficiencies were 37.22% and 11.58%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analysis of solar air heater with trapezoidal ribs based absorber: A comparative analysis

Gogada

Roy

Gupta

et al. 2022

Energy Science & Engineering

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The performance of a solar air heater (SAH) is computationally investigated in this study using COMSOL multiphysics software. The present study aims to enhance the performance of smooth SAH with the help of artificial roughness. To achieve the goal, trapezoidal ribs above (Model 1) and below (Model 2) the absorber were fixed. The thermo‐hydraulic characteristics of smooth SAH were compared with the thermo‐hydraulic performances of Model 1 and Model 2. The computations were made by varying the heat flux between 600 and 1000 W/m2, Reynolds number from 4000 to 7000, relative rib height (h/H) from 0.2 to 0.7, and a constant pitch of 15 mm. The maximum enhancement in Nusselt number (Nu) compared to smooth duct was 5.54 times for Model 1 and 5.42 times for Model 2 at a h/H = 0.7 at Re = 7000. The maximum increase in friction factor was 36.97 times more than the smooth duct. The thermal performance factor (TPF) at 1000 W/m2 ranged from 1.29 to 1.72 for Model 1 and 1.27 to 1.68 for Model 2. It is found that trapezoidal ribs of Model 1 with h/H of 0.6 has delivered a maximum TPF of 1.72 at Re = 7000. The optimized relative rib height was found to be 0.6. The maximum exergy efficiency of 10.40% was obtained for Model 1 with h/H of 0.6 and at 1000 W/m2.

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“…Also, they have sound and pollution‐free operations. The performance of the solar systems depends on environmental conditions, which is the major drawback of the system 3 . Researchers are constantly working to improve the performance of the existing solar thermal systems by adopting and applying new techniques on them.…”

Section: Introductionmentioning

confidence: 99%

“…Argo and Ubaidillah 47 found energy utilization, energy efficiencies, rates of exergy at inlet and outlet, rates of exergy loss, and exergy efficiencies of solar drying system where cassava chips were used to dry on convective trays. Reddy et al 3 constructed a wavy plate solar air collector and exergy analyses have been done. After analyses of literature review, it has been found that many researchers have done work in the field of solar drying systems.…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analyses of fabricated solar drying system with smooth and rough surfaces at different conditions: A case study

Geete

Singh

Rathore³

2021

Heat Trans

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For this experimental work, the solar dryer system has been fabricated. Various experiments have been performed to evaluate the performance of the fabricated dryer system. Energy and exergy concepts have been used for the assessment. And comparative analyses have also been done with smooth and rough surfaces: Grade 150 and Grade 300. This experimental work has been concluded as the maximum collector (i.e., 74°C) and cabinet temperatures (i.e., 66°C) are attained at 13:00 p.m. with Grade 300 surface. Maximum moisture loss (i.e., 35 g) and percentage moisture loss (i.e., 7.53%) are recorded at 13:00 p.m. again with a rough surface. Minimum exergy destruction rate (i.e., 0.294 W) but minimum exergy efficiency (i.e., 20.82%) are found at 17:00 p.m. with a black painted surface, which is not an acceptable condition. Maximum energy efficiency (i.e., 35.98%) and heat removal factor (i.e., 0.56) are obtained at 13:00 p.m. with a rough surface. The best performance from the fabricated solar system is received between 12:00 and 14:00 p.m. This study recommends rough surfaces and 12:00–13:00 p.m. timings for the solar drying system as the performance of the system is better in terms of energy–exergy.

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Energy and exergy analysis of wavy plate solar air collector using a novel hybrid expert system

Cited by 13 publications

References 32 publications

Energy and exergy analysis of a trapezoidal absorber plate‐based solar air collector

Energy and exergy analysis of a trapezoidal absorber plate‐based solar air collector

Energy and exergy analysis of solar air heater with trapezoidal ribs based absorber: A comparative analysis

Energy and exergy analyses of fabricated solar drying system with smooth and rough surfaces at different conditions: A case study

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