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![Relavity humidities of ambient air and drying chamber air at different timings on May 17, 2020 [Color figure can be viewed at wileyonlinelibrary.com]](publication/351582601/figure/fig12/AS:11431281174525532@1689252131912/Relavity-humidities-of-ambient-air-and-drying-chamber-air-at-different-timings-on-May-17.png)
Relavity humidities of ambient air and drying chamber air at different timings on May 17, 2020 [Color figure can be viewed at wileyonlinelibrary.com]
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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 experimen...
Citations
... The drying rate is faster as compared to the direct solar dryer and has a higher cost for initial construction. Fig. 2 shows the structure of an indirect solar dryer [11]. Fig. 3 shows the structure of the mixed-mode solar dryer. ...
... The estimated maximum thermal and exergy efficiencies were 9 % and 0.5 %, respectively. (Geete, 2021) fabricated solar dryer, and the comparative analysis was carried out on the energy and exergy principle for smooth and rough surface of the collector. (Amin et al., 2021) experimented with estimating the drying performance with variable tomato slice thickness, mass flow rate, and drying temperature. ...
In the present work, a parabolic hybrid active greenhouse solar dryer (PHAGSD) embraced with a solar air heater (SAH) has been designed and fabricated at MITS Campus, Gwalior. The dryer is operated in active mode in the winter season and experimentation is performed in the dryer with & without SAH and open sun drying (OSD). The energy and exergy analysis are carried out by drying two seasonable crops, green chilli and okra. In all cases, green chilli and Okra are dried from initial moisture content of 89.33 % (wb) and 91 % (wb) to 10 % (wb) and 7.53 % (wb) respectively. In the case of with SAH, the drying time of green chilli and Okra is 32 h and 26 h, while in the case of without SAH, it is 40 h and 31 h, and when dried in OSD, it is 48 h and 37 h, correspondingly, which is 15 h and 9 h more than the with SAH. The thermal efficiency of the SAH ranges from 57 to 97 %, and the dryer thermal efficiency in the case of with SAH is found 6 % higher than the dryer without SAH. The exergy efficiency of SAH is estimated 9 %. The exergy efficiency in the case of with SAH is found 19 %, while in the case of without SAH, it is 6 %. The dryer’s exergy efficiency in the case of with SAH is found 13 % higher than the without SAH.
