Thermal performance enhancement of tube-type alternative indirect solar dryer with iron mesh modification

Sözen, Adnan; Şirin, Ceylin; Khanları, Ataollah; Tuncer, Azim Doğuş; Gürbüz, Emine Yağız

doi:10.1016/j.solener.2020.07.072

Cited by 84 publications

(37 citation statements)

References 54 publications

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“…The present system consumes less energy than consumed by Fudholi et al (2014) of 5.26 kWh/kg for chili drying. Similar range of SEC were noticed by Sözen et al (2020) range of 2.39–4.11 kWh/kg and Tuncer, Sözen, Khanlari, et al (2020) range of 2.78–4.76 kWh/kg. Figure 6b shows the hourly SF variation with time.…”

Section: Resultssupporting

confidence: 85%

“…During the experimentation, the average value of the SMER for chili drying is found as 0.23 kg/kWh. The magnitude of SMER is significantly higher than that achieved by Fudholi et al (2014) of 0.19 kg/kWh for chili drying, indicating the effectiveness of the present PVT drying system and similar trends of SMER were observed by Sözen et al (2020) range of 0.47–0.73 kg/kWh and Tuncer, Sözen, Khanlari, et al (2020) range of 0.21–0.36 kg/kWh.…”

Section: Resultssupporting

confidence: 82%

“…The improved quality of product and less drying time of ginger, jackfruit, red chili, and turmeric (Ekka & Palanisamy, n.d.2021), mushroom (Babar, Tarafdar, Malakar, Arora, & Nema, 2020), lima beans (Mani & Thirumalai Natesan, n.d.2021), ivy gourd (Elangovan & Natarajan, 2021), and thyme (Karami, Lorestani, & Tahvilian, 2021) were obtained in a solar dryer compared to open sun. The novel solar thermal and solar drying systems were also proposed for enhancing the thermal performance (Afshari, Sözen, Khanlari, Tuncer, & Şirin, 2020; Khanlari, Tuncer, Sözen, Şirin, & Gungor, 2020; Sözen, Şirin, Khanlari, Tuncer, & Gürbüz, 2020; Tuncer, Khanlari, Sözen, et al, 2020; Tuncer, Sözen, Afshari, et al, 2020; Tuncer, Sözen, Khanlari, Amini, & Şirin, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis of stand‐alone solar photovoltaic thermal dryer for drying of green chili in hot‐humid weather conditions ofNorth‐EastIndia

Gupta

Das

Biswas

2021

J Food Process Engineering

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In the present study, an innovative stand-alone solar photovoltaic thermal (PVT) dryer has been designed and tested in hot-humid weather conditions of North-East India for drying green chili. The electrical output of the hybrid PVT solar dryer has been utilized to operate the blower for the dryer making the system self-sustained. A comparative analysis of the drying phenomena under the open sun and in the PVT based dryer is performed. Mathematical modeling is also done to investigate the drying kinetics of green chili for both drying conditions. Results indicate that the moisture content of 0.030 (d.b.) in the solar dryer and 0.035 (d.b.) in the open sun has been reduced for a span of 21 and 37 hr, respectively. Hybrid PVT solar dryer has achieved an average thermal efficiency of 31.37% and an average specific moisture extraction rate of 0.228 kg/kWh. The overall energy consumption for drying green chili is calculated to be 4.90 kWh/kg. Also, the overall thermal efficiency of 64.16%, thermal efficiency of 30.15%, and average electrical efficiency of 12.92% are secured. The results demonstrate the improved performance of the present PVT dryer for green chili drying in comparison to some of the conventional direct/indirect solar dryers. Practical ApplicationsThe present PVT solar dryer system can be utilized for drying the products using thermal energy produced by PVT air collector as well as generating electrical power in the decentralized off-grid areas. Solar drying is not adequately popular in the North-Eastern part of India due to the unavailability of solar drying systems for farmers. The agricultural products can be dried in the farming areas by installing this system. This PVT solar dryer provides a solution to the farmers for drying at zero energy cost and can be used as a source of income generation. This PVT solar drying system can be used to increase the storage life and reduce the spoilage and deterioration of agricultural commodities.Energy efficient solar drying process, high-quality products, and faster drying rate compared to traditional drying method can be achieved with the help of using this system. | INTRODUCTIONFood preservation is a significant major challenge to avoid deterioration, spoilage, and increasing the storage life of food products. There are various techniques to avoid food deterioration. The simplest way to preserve food is drying. Solar energy is the most attractive source of energy over the other sources of energy used for drying. The old process used to dry products with some limitation of the system is

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance analysis of stand‐alone solar photovoltaic thermal dryer for drying of green chili in hot‐humid weather conditions ofNorth‐EastIndia

Gupta

Das

Biswas

2021

J Food Process Engineering

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“…e maximum instantaneous heater efficiency was ascertained to be 72.41%. In the same context, Sözen et al [9] studied the thermal performance improvement of tube-type indirect solar dryer with iron mesh modification. e results show that the use of mesh modification improved the thermal efficiency of the tube-type heater by about 11%.…”

Section: Introductionmentioning

confidence: 99%

CFD Numerical Investigation of a New Solar Flat Air-Collector Having Different Obstacles with Various Configurations and Arrangements

Rouissi

Naili

Jarray

et al. 2021

Mathematical Problems in Engineering

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This work deals with a numerical parametric optimization study of a new Solar Flat Air Collector (SFAC) configuration. The CFD numerical parametric study investigates various SFAC structures inside the air cavity without obstacles and with spherical, cubic, cylindrical, and pyramidal obstacles. The study optimizes the most convenient configuration and arrangement that allow for the increase of the heat-transfer surface and to make the flow homogeneous in order to generate turbulence zones inside the SFAC air cavity. The result shows that the thermal performances of the cubic form are close to those of the spherical obstacles. Another set of simulations was performed to evaluate the performances of the cubic shape baffles for three orientation angles equal to 0°, 22.5°, and 45°, respectively. Each configuration has three forms of arrangement with a relative roughness pitch (b/a) varying between 2, 4, and 6. The results of the simulation study showed that the relative roughness pitch, the Reynolds number, as well as the angle of orientation influence the performance and the operation of the SFAC. The results of the simulations showed that the combination of an orientation of 45° with a roughness pitch of b/a = 2 increases the SFAC thermal performances, which can reach 85%.

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“…They used banana as drying material and found 7.4%–45.32% exergy efficiencies of the solar system. Sozen et al 42 increased the efficiency of solar dryer system with iron mesh arrangement. They found 74.71% instantaneous efficiency with a simple structure of the dryer system.…”

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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Thermal performance enhancement of tube-type alternative indirect solar dryer with iron mesh modification

Cited by 84 publications

References 54 publications

Performance analysis of stand‐alone solar photovoltaic thermal dryer for drying of green chili in hot‐humid weather conditions ofNorth‐EastIndia

Performance analysis of stand‐alone solar photovoltaic thermal dryer for drying of green chili in hot‐humid weather conditions ofNorth‐EastIndia

CFD Numerical Investigation of a New Solar Flat Air-Collector Having Different Obstacles with Various Configurations and Arrangements

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

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