A review of solid desiccant dehumidifiers: Current status and near-term development goals in the context of net zero energy buildings

Shamim, Jubair A.; Hsu, Wei-Lun; Yu, Lili; Daiguji, Hirofumi

doi:10.1016/j.rser.2020.110456

Cited by 50 publications

(18 citation statements)

References 145 publications

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“…Modified and improved designs for various components in HVAC systems, such as dampers dampers [ 25 , 26 ], filters [ 27 , 28 ], humidifier, dehumidifier [ 29 , 30 ], heating and cooling coils [ 31 ], and ducts and fans [ 27 , 32 ], can reduce the energy consumption of such systems while optimizing their performance [ 13 ].…”

Section: Energymentioning

confidence: 99%

Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview

Asim

Badiei

Mohammad

et al. 2022

IJERPH

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Increasing demand on heating, ventilation, and air-conditioning (HVAC) systems and their importance, as the respiratory system of buildings, in developing and spreading various microbial contaminations and diseases with their huge global energy consumption share have forced researchers, industries, and policymakers to focus on improving the sustainability of HVAC systems. Understanding and considering various parameters related to the sustainability of new and existing HVAC systems as the respiratory system of buildings are vital to providing healthy, energy-efficient, and economical options for various building types. However, the greatest opportunities for improving the sustainability of HVAC systems exist at the design stage of new facilities and the retrofitting of existing equipment. Considering the high available percentage of existing HVAC systems globally reveals the importance of their retrofitting. The attempt has been made to gather all important parameters that affect decision-making to select the optimum HVAC system development considerations among the various opportunities that are available for sustainability improvement.

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Section: Energymentioning

confidence: 99%

Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview

Asim

Badiei

Mohammad

et al. 2022

IJERPH

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“…They discovered that in diffrenent climatic conditions, the SDC systems integrated with M-Cycle outperform those integrated with evaporative coolers. Shamim et al [9] provided a comprehensive review of the application of various desiccant cooling systems for NZEB in hot and humid environments. They concluded that combining a desiccant dehumidifier and a traditional vapour compression (VC) system as a hybrid desiccant cooling system has emerged as a space cooling technology that is promising for the NZEBs, which does not require much energy from the grid.…”

Section: Introductionmentioning

confidence: 99%

Solar Desiccant Cooling System as an Alternative Solution for Net-Zero Energy Buildings (NZEBs) in the Tropical Regions

Dezfouli¹,

Kadir²,

Sopian³

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The development of energy-efficient cooling systems is a major challenge for Net-Zero Energy Buildings (NZEBs) in tropical climates. This study proposes a solar-assisted two-stage hybrid desiccant cooling system as an energy-efficient air conditioning (AC) system for use in tropical NZEBs. TRNSYS software was used to simulate the proposed model for application in a classroom with a high latent load (51%). The simulation results were analysed in terms of air properties, energy allocation, and potential energy savings. It was discovered that using two-stage dehumidification instead of one-stage dehumidification reduced regeneration temperature from 72 °C to 63 °C, which leads to considerable reduction in backup heater energy consumption. This study shows that by means of the proposed model instead of a fan coil unit, thermal comfort and energy savings of 37% can be achieved.

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“…In the hot and humid environment, these factors also contribute in defining the energy load for thermal comforts towards net-zero energy building (NZEB). Thus, the challenges in providing good thermal comfort and indoor air quality (IAQ) for daily living in hot and humid conditions while consuming less energy must be overcome [1]. In the hot and humid environment, one of the strategies to reduce the humidity level in the air is through dehumidification [2].…”

Section: Introductionmentioning

confidence: 99%

“…These materials are versatile and may be incorporated into sachets, canisters, cards, and even bottle closures. In the literature, different types of desiccants and their moisture sorption capabilities can be identified [1]. Molecular sieve has been beneficial in cheaply accessible desiccant materials due to its reduced hygroscopic limit, and activated alumina has brought down sorption confine almost half that of silica gel.…”

Section: Introductionmentioning

confidence: 99%

“…Silica gel particles have a huge surface area because they are made up of an interconnected network of capillaries. Surface adsorption and capillary condensation in the porous network are two processes for moisture adsorption by silica gel [1]. At room temperature, silica gel functions effectively, but the adsorption rate and equilibrium moisture content may be reduced at higher temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Performance of Calcium Chloride and Silica Gel as Solid Desiccant Dehumidifiers for Indoor Air Quality

Ramli

Yusup

Lin

et al. 2021

ARFMTS

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Desiccant materials are recently discovered as a viable alternative in dehumidification technology due to their naturally hygroscopic qualities and minimal energy requirement. This paper discusses the performance of four brand samples of selected desiccants used for dehumidification. In this study, dehumidification ability and indoor air quality (IAQ) tests were carried out. The dehumidification ability test was conducted in a controlled environmental chamber at a temperature of 25°C, relative humidity of 70%, and air velocity of 2 m/s for 45-minute session. Meanwhile, the IAQ test was carried out in a naturally ventilated test room, and six IAQ parameters (relative humidity, air velocity, air temperature, particulate matter (PM10), airborne bacteria and carbon dioxide (CO2) were studied. The IAQ test was performed for five different conditions: control, application of brand samples A, B, C and D in the test room. From this study, it was found, brand A (0.6823 g/kg) and brand B (0.6849 g/kg) had a relatively good dehumidification ability during the 45-minute dehumidification ability test compared to brand C (0.3108 g/kg) and brand D (0.3982 g/kg). The IAQ test revealed that brand A had the biggest variation in indoor-outdoor relative humidity of 13.12%, while brand D had the smallest difference of 11.83%. Brand B had the highest average PM10 concentration of 0.037 μg/m3. The airborne bacterial count for all conditions had no statistical significance, indicating the application of desiccants were not effective in reducing airborne bacteria. From this study, it can be concluded that calcium chloride (brand A and B) samples performed better than silica gel (brand C and D) samples in terms of dehumidification ability and IAQ profile.

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A review of solid desiccant dehumidifiers: Current status and near-term development goals in the context of net zero energy buildings

Cited by 50 publications

References 145 publications

Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview

Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview

Solar Desiccant Cooling System as an Alternative Solution for Net-Zero Energy Buildings (NZEBs) in the Tropical Regions

Performance of Calcium Chloride and Silica Gel as Solid Desiccant Dehumidifiers for Indoor Air Quality

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