The Regeneration of Various Solid Desiccants by Using a Parabolic Dish Collector and Adsorption Rate: An Experimental Investigation

Kumar, Amit; Chaudhary, Ankur; Yadav, Avadhesh

doi:10.1080/15435075.2013.833514

Cited by 24 publications

(6 citation statements)

References 14 publications

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“…In order to investigate the regeneration performance of the SPDW, three conditions of simulated solar radiation, i.e., 300 W/m 2 , 600 W/m 2 , and 900 W/m 2 , will be conducted under an inlet air temperature of 24.5 • C and a relative humidity of 80%. The variation of the desiccant temperature and the regeneration rate with time [23,24] will be analysed for the system operated under different simulated solar radiations.…”

Section: Analysis and Discussion Of The Testing Results Of Regeneratimentioning

confidence: 99%

Performance Investigation of the Novel Solar-Powered Dehumidification Window for Residential Buildings

et al. 2017

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Abstract:In this paper, a solar-powered dehumidification window (SPDW), combining a conventional double-glazed building window with a solid desiccant packed bed and a photovoltaic panel, has been proposed to dehumidify the air supplied to a residential building in an energy-saving way. The solid desiccant packed bed was installed between the double layers of the residential window to achieve the compact building-integrated window-dehumidifying system that could be regenerated by solar energy, and the photovoltaic panel was used to compensate the electricity for the operation of the fans to supply the air to the building. To investigate the dehumidification and regeneration performance of the SPDW, the transient moisture removal, dehumidification efficiency, temperature difference between the building inlet and outlet air, heat transfer characteristics, desiccant temperature, regeneration rate, and the power of the fans and the photovoltaic panel were analysed for different inlet air conditions and simulated solar radiation. It was found that, for the system operated under an inlet air temperature of 19.2 • C and a relative humidity of 86.1% during the dehumidification process, the system performed with a maximum transient moisture removal of 7.1 g/kg, a maximum dehumidification efficiency of 58.60%, a maximum temperature difference between the inlet and outlet air of 10.7 • C, and a maximum released adsorption heat absorbed by the dehumidified air of 89.66%. In the regeneration process, the system performed with a maximum desiccant temperature of 35.3 • C, a maximum regeneration rate of 153 g/h, and a maximum power of the photovoltaic panels of 39.83 W under the simulated solar radiation of 900 W/m 2 . The results from the established semi-empirical model agreed well with the testing results, and the model could be used to predict the water content ratio of the desiccant modules during the dehumidification process under different conditions, which will be helpful in the analysis and application of the SPDW in the future.

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Section: Analysis and Discussion Of The Testing Results Of Regeneratimentioning

confidence: 99%

Performance Investigation of the Novel Solar-Powered Dehumidification Window for Residential Buildings

et al. 2017

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“…Here, T i = inlet temperature, D i = inlet humidity ratio, T conduction = conduction temperature, M H2o = water generation per unit dry air (kg/kg), « T = heat exchange effectiveness of the condenser, « d = mass exchange effectiveness of the condenser, Q cond = total cooling load of moist air. The adsorption rate is defined as (Kumar et al, 2014):…”

Section: Analysis For the Adsorption And Regeneration Of Solid And Li...mentioning

confidence: 99%

Water generation from atmospheric air by using desiccant materials- nature-based solution – a review

Kumar

Mehla

Srivastava

et al. 2022

WJE

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Purpose This paper aims to provide a critical review of water generation from atmospheric air by using desiccant materials. Over the past few years, there has been very high stress on water scarcity, especially in Asian and African countries. Because of this insecurity, many countries are focusing on their research in the field of water technologies. Water generation from atmospheric air by using desiccant materials is one of the techniques among the air-to-water generators (AWGs). Design/methodology/approach A structured and systematic literature review has been presented to observe and understand the past trend/patterns in the field of water generation from atmospheric air by using desiccant materials. To understand the water generation technologies based on desiccant materials, the research papers from the years 1987 to 2022 have been studied and included. Findings The properties of the different and most probable desiccant materials in the field of AWGs have been discussed. A detailed review of testing reports of collected water samples has also been presented in tabular form. Finally, the economic analysis has been done and future prospects have been discussed. It is also found that the capacity of solid desiccant materials to adsorb the water is less as compared to liquid desiccant materials. But, the adsorption capacity can be improved by using composite desiccant materials. Originality/value The uniqueness of this manuscript lies in the compiling and examination of the existed published research papers, including variables such as author, year and geographical location, experimental/simulative, types of desiccant material, type of setup, desiccant material type and quantity and type of concentrator. This manuscript provides critique to the empirical and conceptual research in AWG technologies and also stimulates researchers to explore the topic very carefully.

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“…This could bring the regeneration air temperature up to a value that allows the desiccant to be regenerated. The adsorption heat energy released to desiccant particle dependents on the mass transfer rate from process air stream to desiccant pores, which heavily depended on the desiccant particle surface due to the moisture partial pressure [5]. Much research on the solid desiccant dehumidifiers has been accomplished, and many successfully effective mathematical models to predict the heat and mass transfer process in such dehumidifiers have emerged [6] .…”

Section: Introductionmentioning

confidence: 99%

“…Figure(5) display the digital relative humidity-temperature sensor (DHT11) with Arduino (UNO micro-controlled board) that were used to measure the temperature and the relative humidity of the regeneration air entering and leaving the desiccant column. The hot wire device model (GM 8903) as shown in figure(6), was used to measure the velocity of the air entering the desiccant column.…”

mentioning

confidence: 99%

Experimental Study of the Effects of Silica-gel Bed Thickness on The Regeneration Process in a Desiccant Column

Abdali¹,

Hassen

2022

ejuow

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A desiccant column contains a silica gel as a solid moisture absorbent material has been used in this study, in which the regeneration or desorption process was discussed. The dimensions of the silica-gel column are 30 cm long*30 cm wide with three thickness of desiccant bed (5,10, &15) cm, respectively. The mass flow rate and the inlet temperature of the regeneration air used are 3.72 kg/min and 53 °C respectively. This air was obtained using solar air heater in addition to an electric heating unit for temperature control purpose. The results obtained showed that the regeneration period is affected by the bed thickness. Increasing the bed thickness of silica increase the regeneration period and vice versa For example, the complete drying process of silica gel from moisture took 21 min with thickness of bed (5 cm), while it took 42 min with thickness of bed (15 cm)

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The Regeneration of Various Solid Desiccants by Using a Parabolic Dish Collector and Adsorption Rate: An Experimental Investigation

Cited by 24 publications

References 14 publications

Performance Investigation of the Novel Solar-Powered Dehumidification Window for Residential Buildings

Performance Investigation of the Novel Solar-Powered Dehumidification Window for Residential Buildings

Water generation from atmospheric air by using desiccant materials- nature-based solution – a review

Experimental Study of the Effects of Silica-gel Bed Thickness on The Regeneration Process in a Desiccant Column

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