Comparative study of different desiccant wheel designs

Narayanan, Ramadas; Saman, Wasim; White, Stephen D.; Goldsworthy, Mark

doi:10.1016/j.applthermaleng.2011.01.043

Cited by 95 publications

(29 citation statements)

References 9 publications

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“…The air temperature required for the regeneration of the desiccant is approximately 60-80 • C (Maclaine-Cross and Banks 1972;Jurinak 1982;Lowenstein, Slayzak, and Kozubal 2006;Ge, Ziegler, and Wang 2010;Narayanan et al 2011), so conventional gas-fired burners or HCs are commonly used to heat the regeneration air. Unfortunately, some of this regeneration heat is transferred to the supply air side, which makes additional cooling of the process air Downloaded by [University of Nebraska, Lincoln] at 23:15 12 April 2015 necessary.…”

Section: Solid Desiccant Systemmentioning

confidence: 99%

Application of desiccant systems for improving the performance of an evaporative cooling-assisted 100% outdoor air system in hot and humid climates

Kim

Park

et al. 2014

Journal of Building Performance Simulation

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The purpose of this study was to enhance the energy-saving potential of an indirect and direct evaporative cooling-assisted 100% outdoor air system (IDECOAS) by integrating it with either a solid or liquid desiccant system. The desiccant system can be installed either at the scavenger air side of the indirect evaporative cooler (IEC) to enhance its effectiveness or at the primary air side of the IEC to reduce the latent load of outdoor air. The operating energy consumption affected by the location and type of the desiccant unit integrated with IDECOAS was simulated under three different hot and humid climates using TRNSYS 17 integrated with commercial equation solver programme. And then, the most energy-conservative configuration was selected for each climate zone as the proposed system. The simulation results showed that configurations with the desiccant dehumidification unit located upstream of the IDECOAS consume 76-85% less cooling coil energy than those with the desiccant unit located downstream of the IDECOAS. It was also found that the liquid desiccant system saves 21-50% more primary energy than the solid one, when it is integrated with IDECOAS.

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Section: Solid Desiccant Systemmentioning

confidence: 99%

Application of desiccant systems for improving the performance of an evaporative cooling-assisted 100% outdoor air system in hot and humid climates

Kim

Park

et al. 2014

Journal of Building Performance Simulation

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“…8(b) and (c). The wheel is divided into four portions; therefore, only a quarter of the wheel is undergoing the dehumidification process (with another quarter undergoing the regeneration process) at any given time [24]. The total adsorption rate of the packed bed and fluidized bed systems in one hour (kg/h) can be obtained by the average adsorption rate (g/s) at the 5-min point (Fig.…”

Section: System Stability Under Continuous Operationmentioning

confidence: 99%

Adsorption and desorption of silica gel circulating fluidized beds for air conditioning systems

Chen

et al. 2015

Applied Energy

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“…The compound desiccant wheel was found to have a better performance in a climate with moderate temperatures or in a climate with a high humidity ratio. Narayanan et al 18 developed a one dimensional transient gas and solid side resistance model and compared the performance of different desiccant wheel designs (parallel flow, counter flow, and additional axial cooling). They found counter flow desiccant wheel had much better dehumidification performance than parallel flow and the counter flow with axial cooling improved the dehumidification performance considerably.…”

Section: Introductionmentioning

confidence: 99%

Analysis of various designs of a desiccant wheel for improving the performance using a mathematical model

Yadav

Bajpai

2013

Journal of Renewable and Sustainable Energy

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A mathematical model for predicting the performance of a desiccant wheel with various wheel designs has been used by considering heat and mass transfer for both moist air and the desiccant material. The model shows good agreement with experimental data. An experimental setup was fabricated using an evacuated tube solar air collector with a desiccant wheel. The hot air needed for regeneration is produced by the evacuated tube solar air collector, which has a collector surface area of 4.44 m 2 . The regeneration can be started from 40 C. The temperature of outlet air obtained is in the range of 40-65 C in this evacuated tube solar air collector. The experimental setup was installed at NIT Kurukshetra, India, 29 58 0 (latitude) North and 76 53 0 (longitude) East. This model is used to compare the performance of two sector and four sector desiccant wheels and found that the maximum moisture removal efficiency of both two sector and four sector is same but in the two sector, it is obtained at twice the rph of a four sector. This model is also used to analyze the performance of two sectors with heated and cooled purge at different regeneration temperature and found that the desiccant system with a higher purge angle and lower regeneration angle performs better at low rph as compared to a lower purge angle and higher regeneration angle. V C 2013 American Institute of Physics. [http://dx.

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Comparative study of different desiccant wheel designs

Cited by 95 publications

References 9 publications

Application of desiccant systems for improving the performance of an evaporative cooling-assisted 100% outdoor air system in hot and humid climates

Application of desiccant systems for improving the performance of an evaporative cooling-assisted 100% outdoor air system in hot and humid climates

Adsorption and desorption of silica gel circulating fluidized beds for air conditioning systems

Analysis of various designs of a desiccant wheel for improving the performance using a mathematical model

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