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Performance evaluation of a vertical-axis rotary silica gel dehumidifier for energy-efficient and sustainable HVAC applications.

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Title: Performance evaluation of a vertical-axis rotary silica gel dehumidifier for energy-efficient and sustainable HVAC applications.
Authors: Salins, Sampath Suranjan1 (AUTHOR), Sachidananda, H. K.1 (AUTHOR), Shoaib, Mohamed1 (AUTHOR), Machado, Cian Sanjay1 (AUTHOR), Karthikeyan, Tharun guruvaredduyur1 (AUTHOR), Milan, Mohammed1 (AUTHOR), Kumar, Shiva2 (AUTHOR) shiva.kumar@manipal.edu
Source: Journal of Thermal Analysis & Calorimetry. Apr2026, Vol. 151 Issue 7, p5871-5887. 17p.
Subjects: Silica gel, Humidity control equipment, Heating & ventilation industry, Humidity control, Mass transfer coefficients, Air quality
Abstract: This study focuses on the design and construction of a vertical-axis rotary dehumidifier test rig, which utilizes silica gel as the desiccant to remove moisture from the air. Regeneration of the desiccant is facilitated by a heater and a dedicated blower that generates suction to remove moisture adsorbed onto the solid desiccant. The tests were conducted by varying the motor speed from 40 to 100 rpm and adjusting the air Reynolds number between 13,682.43 and 45,608.1. The results demonstrated a maximum change in temperature of 4.2 °C, a specific humidity change of 3 gkg−1, a moisture removal rate (MRR) of 0.090 gs−1, dehumidification efficiency of 0.91, and a mass transfer coefficient (MTC) of 74.54 kgm−2 s−1. Experimental findings indicated that the dynamic humidifier outperformed the static humidifier in terms of performance. Air quality tests revealed that pollution levels increased with motor speed and air velocity; however, pollutants such as carbon dioxide, total volatile organic compounds, and formaldehyde remained within acceptable limits. It was observed that the velocity of air entering the dehumidifier decreases with increased motor speed. Additionally, the change in air velocity and the change in specific humidity were found to be inversely proportional to each other. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Thermal Analysis & Calorimetry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 193168110
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Performance evaluation of a vertical-axis rotary silica gel dehumidifier for energy-efficient and sustainable HVAC applications.
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  Data: <searchLink fieldCode="AR" term="%22Salins%2C+Sampath+Suranjan%22">Salins, Sampath Suranjan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sachidananda%2C+H%2E+K%2E%22">Sachidananda, H. K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shoaib%2C+Mohamed%22">Shoaib, Mohamed</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Machado%2C+Cian+Sanjay%22">Machado, Cian Sanjay</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Karthikeyan%2C+Tharun+guruvaredduyur%22">Karthikeyan, Tharun guruvaredduyur</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Milan%2C+Mohammed%22">Milan, Mohammed</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kumar%2C+Shiva%22">Kumar, Shiva</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> shiva.kumar@manipal.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Thermal+Analysis+%26+Calorimetry%22">Journal of Thermal Analysis & Calorimetry</searchLink>. Apr2026, Vol. 151 Issue 7, p5871-5887. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Silica+gel%22">Silica gel</searchLink><br /><searchLink fieldCode="DE" term="%22Humidity+control+equipment%22">Humidity control equipment</searchLink><br /><searchLink fieldCode="DE" term="%22Heating+%26+ventilation+industry%22">Heating & ventilation industry</searchLink><br /><searchLink fieldCode="DE" term="%22Humidity+control%22">Humidity control</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+transfer+coefficients%22">Mass transfer coefficients</searchLink><br /><searchLink fieldCode="DE" term="%22Air+quality%22">Air quality</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study focuses on the design and construction of a vertical-axis rotary dehumidifier test rig, which utilizes silica gel as the desiccant to remove moisture from the air. Regeneration of the desiccant is facilitated by a heater and a dedicated blower that generates suction to remove moisture adsorbed onto the solid desiccant. The tests were conducted by varying the motor speed from 40 to 100 rpm and adjusting the air Reynolds number between 13,682.43 and 45,608.1. The results demonstrated a maximum change in temperature of 4.2 °C, a specific humidity change of 3 gkg−1, a moisture removal rate (MRR) of 0.090 gs−1, dehumidification efficiency of 0.91, and a mass transfer coefficient (MTC) of 74.54 kgm−2 s−1. Experimental findings indicated that the dynamic humidifier outperformed the static humidifier in terms of performance. Air quality tests revealed that pollution levels increased with motor speed and air velocity; however, pollutants such as carbon dioxide, total volatile organic compounds, and formaldehyde remained within acceptable limits. It was observed that the velocity of air entering the dehumidifier decreases with increased motor speed. Additionally, the change in air velocity and the change in specific humidity were found to be inversely proportional to each other. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Thermal Analysis & Calorimetry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10973-026-15433-3
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      – Code: eng
        Text: English
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        PageCount: 17
        StartPage: 5871
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      – SubjectFull: Silica gel
        Type: general
      – SubjectFull: Humidity control equipment
        Type: general
      – SubjectFull: Heating & ventilation industry
        Type: general
      – SubjectFull: Humidity control
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      – SubjectFull: Mass transfer coefficients
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      – SubjectFull: Air quality
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      – TitleFull: Performance evaluation of a vertical-axis rotary silica gel dehumidifier for energy-efficient and sustainable HVAC applications.
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              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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