Assessment of process parameters in a dehumidification process using biomass-based wood shaving as a packing material

Salins, Sampath Suranjan; Reddy, S. Rama

doi:10.1177/1420326x211008509

Cited by 7 publications

(6 citation statements)

References 26 publications

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“…Naik et al [29] observed an efficiency of 74% and MRR of 3.2 g/s under LiCl as the desiccant. Corresponding values observed by Salins et al [30] were 65% and 0.25 g/s, respectively, during the experiments with wood shaving material. Present experimental results revealed a dehumidification efficiency of 75% and MRR of 0.76 g/s with activated carbon as the desiccant.…”

Section: Comparison With Literature Resultssupporting

confidence: 74%

Experimental Investigation on Dehumidification Using a Solid Composite Bio Desiccant Internally Cooled Using Nanofluids for Building Cooling

2023

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Indoor comfort has become a major factor with advancements in science and technology. This also leads to an increase in greenhouse gases as well as energy consumption. Desiccant-coated heat exchangers are one of the common solutions to these risks and to lower energy usage. In the present work, the capability of a solid composite desiccant blend prepared from coconut shell-based activated carbon and bio char was studied. Aluminum plates have been coated with the prepared solid desiccants. Desiccant-coated heat exchangers were cooled by the cerium oxide nanofluid passing through the pipes connected along the length of the heat exchanger. Air was blown through the plates where dehumidification occurs due to the vapor pressure difference between the air and the desiccant-coated plate. The experiments were conducted by varying the air velocity, water flow rate, and nanoparticle concentration. The nanoparticle volume fraction varied from 0.05% to 0.3%. Different performance parameters such as the moisture removal rate, dehumidification efficiency, cooling capacity, and coefficient of performance (COP) were calculated. Results showed that the performance parameters were enhanced with an increase in the water flow rate as well as the air flow rate. Furthermore, it was seen that with the addition and increase in nanoparticle concentration, the moisture removal rate and dehumidification efficiency were enhanced. In comparison to no addition of nanoparticles, a 0.3% addition of nanoparticles demonstrated a maximum increase in MRR of 53% and dehumidification efficiency of 57%. A maximum reduction of 6.1% in the dehumidification area was achieved by using 0.3% nanoparticles with water. It is recommended to use nanofluids for dehumidification using solid desiccants, which can enhance the performance without having negative influence on the environment.

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Section: Comparison With Literature Resultssupporting

confidence: 74%

Experimental Investigation on Dehumidification Using a Solid Composite Bio Desiccant Internally Cooled Using Nanofluids for Building Cooling

2023

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“…where ω i = inlet air specific humidity (g/kg of dry air) ω o = outlet air specific humidity (g/kg of dry air) The ratio between actually realized dehumidification and maximum dehumidification potential is known as dehumidification effectiveness (ε y ), as defined by equation (2). It reflects the dehumidification capacity of the desiccant.…”

Section: Performance Indicesmentioning

confidence: 99%

“…The liquid desiccant dehumidification has demonstrated enormous potential and its use in air conditioning systems results in low energy consumption and increased comfort within the control system. 2,3 It also overcomes the limitations like high regeneration temperature and the requirement of a larger heating source of solid desiccants. The liquid desiccant properties like vapour pressure, regeneration temperature, viscosity, corrosiveness and cost have a huge impact on the system's performance.…”

Section: Introductionmentioning

confidence: 99%

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Dehumidification performance improvement by using liquid desiccant blends – An experimental study

Parida

Kumar

2023

Indoor and Built Environment

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To minimize global warming and consumption of electricity, a desiccant-based air conditioning system has been proposed as a better alternative to control air humidity, compared to the conventional air conditioning system. In the present study, the performance of the hybrid desiccant was compared with the pure LiBr and KCOOH solution. Blends of LiBr and KCOOH at different weight ratios were used as desiccants. The performance of the system was compared based on its moisture removal rate and dehumidification effectiveness. The performance of the system increased with increasing desiccant flow rate, the concentration of the solute and the airflow rate. From the tested concentrations, the blend of 40% LiBr and 10% KCOOH concentration showed the highest MRR and dehumidification effectiveness among all blends of LiBr and KCOOH. From the study, it can be concluded that by using an optimized blend of LiBr and KCOOH as a desiccant in place of neat LiBr, the limitations of pure LiBr can be partly resolved without sacrificing much on the dehumidification performance.

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“…It is thus critical to improve the energy efficiency when controlling the temperature and humidity within the occupied spaces. In AC, the temperature is maintained below dew point temperature to remove moisture by condensation [2]. Due to water collection, there is a risk of growth of the mold and bacteria, with the consequent undesirable health effects.…”

Section: Introductionmentioning

confidence: 99%

Influence of Desiccant Concentration and Temperature on Moisture Absorption Using a Multistage Dehumidifier

Tejero‐González

Salins

Reddy³

2023

36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 20

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Moisture control is essential for appropriate indoor air quality, mainly in humid regions. Liquid desiccant dehumidification system is among the latest techniques used to minimize the humidity indoors and maintain thermal comfort, requiring less energy than dehumidification through conventional refrigeration. In the current work, a four-stage dehumidifier is constructed, which consists of a dynamic packing soaked in the solution containing the desiccant. The linear motion of packing is induced by a cam spring follower mechanism powered by a motor. Celdek 7090 is used as packing along with Calcium Chloride of different concentrations as desiccant. Experiments are conducted for varying air velocity, desiccant concentration, and inlet dry bulb temperature. Input parameters are noted and performance parameters such as coefficient of performance, moisture removal rate, dehumidification efficiency, and humidity and temperature drops are evaluated. Results indicate that an increase in the desiccant concentration yields larger dehumidification, though 40% desiccant concentration led to adverse effects on the system components and hindered the flow. Rise in the inlet temperature slightly raised the dehumidification. System gave maximum moisture removal rate, dehumidification efficiency, and coefficient of performance equal to 4.83 g/s, 72.74%, and 4.35 respectively. Results also showed that increasing air velocity reduced the dehumidification efficiency. Air quality check conducted on the exit air, it is found that air quality is good and meets ASHRAE standards.

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Assessment of process parameters in a dehumidification process using biomass-based wood shaving as a packing material

Cited by 7 publications

References 26 publications

Experimental Investigation on Dehumidification Using a Solid Composite Bio Desiccant Internally Cooled Using Nanofluids for Building Cooling

Experimental Investigation on Dehumidification Using a Solid Composite Bio Desiccant Internally Cooled Using Nanofluids for Building Cooling

Dehumidification performance improvement by using liquid desiccant blends – An experimental study

Influence of Desiccant Concentration and Temperature on Moisture Absorption Using a Multistage Dehumidifier

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