Solar Desiccant Drying Technology and Its Food Drying Application: A Review

Gupta, Aditya; Jain, Kapil; Deshpande, Sarthak; Gupta, Abhishek; Kumar, Amit

doi:10.1615/specialtopicsrevporousmedia.2022040992

Cited by 4 publications

(3 citation statements)

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“…The technologies like drying, 1 desalination, 2 cooling, 3 air conditioning, 4 and atmospheric water harvesting 5 requires hot air. The hot air can be produced by using conventional energy sources (like fossil fuels) and renewable energy sources (like solar energy, wind energy).…”

Section: Introductionmentioning

confidence: 99%

Experimental comparison of solar air heater based on single and double‐ends open evacuated tube collector

Tiwari,

Kumar

2023

Env Prog and Sustain Energy

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The hot air has a lot of applications like drying, space heating, desiccant air conditioning and desalination, which attracts the attention of researchers towards the system used for producing the hot air. In the present work, two different solar air heaters that is, double‐ends open evacuated tube based solar air heater (system 1) and single‐end open evacuated tube based solar air heater (system 2) are proposed and compared experimentally. The aperture area of each system is 4.687 m2 and operated under same weather conditions. The experiments are performed at three different mass flow rates of the process air that is, 153.21, 207.94, and 246.24 kg/h. The highest mean air temperature difference is 62.91 and 48.8°C for system 1 and system 2 respectively at mass flow rate of 153.21 kg/h. The highest mean energy and exergy efficiency obtained by the system 1 and system 2 are 81.55%, 6.80%, and 65.45% and 4.25% respectively. The present work is also compared with the work presented in literature and it is observed that double‐end open evacuated tube collector has significantly high energy and exergy efficiency with higher hot air temperature.

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Section: Introductionmentioning

confidence: 99%

Experimental comparison of solar air heater based on single and double‐ends open evacuated tube collector

Tiwari,

Kumar

2023

Env Prog and Sustain Energy

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“…Solar energy, even if having a high initial cost, should be preferred above other energy sources for its safety and environmental reasons. Solar energy has been studied extensively to maximize its benefits and because of its inconceivable capability of overcoming energy requirements, it has a wide scope of application in the pitch of water heating, 5,6 air heating, 7 air conditioning, 8 cooking, 9–11 water generation, 12 greenhouse, 13 and drying 14 …”

Section: Introductionmentioning

confidence: 99%

“…Solar energy has been studied extensively to maximize its benefits and because of its inconceivable capability of overcoming energy requirements, it has a wide scope of application in the pitch of water heating, 5,6 air heating, 7 air conditioning, 8 cooking, [9][10][11] water generation, 12 greenhouse, 13 and drying. 14 Flat Plate Collectors (FPCs) and Evacuated Tube Collectors (ETCs) are used for harvesting solar energy due to their simple design and effectiveness. ETCs are more beneficial as the absorbing tubes have high vacuum insulation, which considerably reduces both; convective losses and conductive losses.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of evacuated tube solar air heater (ETSAH) with inbuilt sensible thermal energy storage

2022

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In the present work, an evacuated tube solar air heater (ETSAH) with inbuilt sensible heat storage material (SHSM) is experimentally evaluated. The system comprises two sets each having 50 evacuated tubes with an H‐type arrangement and a total collector area of 16.92 m2. For the purpose of hot air generation, ETSAH is simultaneously connected in series and in parallel with and without the use of reflectors. Three different mass flow rates of 122.90, 164.87, and 212.83 kg/h were fixed to get 12 diverse cases of ETSAH operation. The highest hot air temperature reported by the system is 121.7°C when it was connected in series with conventional reflectors at 212.83 kg/h of flow rate and 469 W/m2 average solar intensity. The system reported an overall average energy efficiency of 49.76% and an exergy efficiency of 17.97% with the highest average hot air temperature difference of 56.12°C from 09:00 to 20:00 h. Without the incorporation of any additional SHSM, the average hot air temperature delivered by ETSAH (when under the neighbor building shadow) is 49.73°C logged from 17:00 to 20:00 h. The economic analysis is also carried out to ensure its practical application and feasibility. For the best system performance, the annual cost of hot air generation is 0.0194 Rs./kg (0.0002433 $/kg).

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Effect of operating parameters of desiccant wheel on the performance of solar desiccant dehumidifier

Kushwaha,

Kumar,

Choudhary

2024

Env Prog and Sustain Energy

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To produce dry air, desiccant wheel is a very common choice now a day. However, it's crucial to utilize the desiccant wheel effectively. Therefore, in the present investigation, a numerical model is developed to identify the best operating conditions for a solar desiccant dehumidifier based on desiccant wheel and it is observed that the dehumidification capacity can be increased by simultaneously increasing the process air velocity and RPH of the desiccant wheel. A higher temperature of hot air for regeneration allows for a higher process‐to‐regeneration sector facial area ratio, which results in higher amount of dry air. After the mathematical investigation, the desiccant wheel is attached with solar air heater for experimental investigation. The solar air heater is based on both ends open evacuated tube collector, which is able to produce hot air at about 150°C at a mass flow rate of 143 kg/h. At this temperature the desiccant wheel shows remarkable dehumidification effectiveness of 0.61 with an average moisture removal of 0.0098 kgwp/kgda. The average thermal effectiveness and DCOP of the solar desiccant dehumidifier are observed to be 0.24 and 0.23, respectively.

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Solar Desiccant Drying Technology and Its Food Drying Application: A Review

Cited by 4 publications

References 0 publications

Experimental comparison of solar air heater based on single and double‐ends open evacuated tube collector

Experimental comparison of solar air heater based on single and double‐ends open evacuated tube collector

Experimental analysis of evacuated tube solar air heater (ETSAH) with inbuilt sensible thermal energy storage

Effect of operating parameters of desiccant wheel on the performance of solar desiccant dehumidifier

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