Study on Noncondensing Air-Conditioning System Performance When Combining a Desiccant Cooling System with a CO
            <sub>2</sub>
            Heat Pump

Tsay, Yaw-Shyan; Kato, Shinsuke; Ooka, Ryozo; Koganei, Makoto; Nishida, Kousaku; Kawamoto, Koichi

doi:10.1080/10789669.2006.10391217

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…The authors developed the desiccant-based air-conditioning system in a previous study [4]. The proposed system was ameliorated by combining it with a heat pump for regeneration, and dehumidification experiments were performed.…”

Section: Overview Of the Experimental Setupmentioning

confidence: 99%

“…This has been reported as an effective method for reducing the degradation of the Indoor Air Quality (IAQ), which is caused by microbes, such as mold or bacteria [1][2][3][4]. In addition, many studies have been conducted on the application of desiccant air-conditioning systems as dedicated outdoor air systems (DOASs) during the summer [5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…A dew-free environment could be achieved both inside the air-conditioning unit and indoors throughout the year. 4.…”

mentioning

confidence: 99%

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Field Study on Humidification Performance of a Desiccant Air-Conditioning System Combined with a Heat Pump

Kawamoto¹,

Cho

Kohno

et al. 2016

Energies

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A desiccant air-conditioning system was developed as a latent-load-processing air conditioner in a dedicated outdoor air system during the summer. This study investigated the application of this air-conditioning system to humidification during the winter without using make-up water, thereby eliminating the cause of microbial contamination in air-conditioning systems. The experiments were conducted with a system used for summer applications to determine the feasibility of adsorbing vapor from outdoor air and supplying it to an indoor space. The humidification performance, energy efficiency, and operating conditions were examined. Although the conditions were subpar because the experiments were performed with an actual dedicated outdoor air system, the results showed that it is possible to supply air with a minimum humidity ratio of 5.8 g/kg dry air (DA) when the humidity ratio of outdoor air ranges from 1.8 to 2.3 g/kg DA. The minimum humidification performance required for a dedicated outdoor air system was achieved by increasing the airflow rate of the moisture-adsorption side to 2-3 times that of the humidification side. In addition, air leaking from the moisture-adsorption side to the humidification side, improving the mechanical structure, such as by the insulation of the moisture-adsorption side, and an efficient operating method were examined for humidification during the winter.

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Section: Overview Of the Experimental Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Field Study on Humidification Performance of a Desiccant Air-Conditioning System Combined with a Heat Pump

Kawamoto¹,

Cho

Kohno

et al. 2016

Energies

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“…14 As a countermeasure for such problems, Jia et al 15 and White et al 16 studied alternative desiccant materials for desiccant wheels. Tsay et al 17 studied the noncondensing air-conditioning system performance, Li et al 18 studied the effects of pore sizes of porous silica gels on desorption, and Majumdar and Worek 19 studied the performance of an open-cycle desiccant cooling system. Sphaier and N obrega, 20 Hatamia et al 21 and Chung et al 22 studied the optimization of desiccant cooling system and Ge et al 23 reviewed the applicability of using solar energy.…”

Section: Introductionmentioning

confidence: 99%

Investigation on heat and mass transfer characteristics for a zeolite-coated heat exchanger using comparatively low-temperature energy: Heating humidification mode and cooling dehumidification mode

Park¹,

Lee

2020

Indoor and Built Environment

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Desiccant-based hybrid air-conditioning technologies are currently being developed to reduce energy consumption and enhance the effectiveness of indoor thermal environmental control in buildings. The purpose of this study is to propose a compact desiccant-based outdoor air-conditioning system that directly uses heated desorption and cooled adsorption with comparatively low-temperature energy, and to propose a mathematical model for the system by investigating the heat and mass transfer characteristics of a zeolite-coated heat exchanger (ZCHE). To study the heat and mass transfer characteristics of the ZCHE, the moisture removal capacity and the moisture removal regeneration were measured at various heat source temperatures and water flow rates using an experimental model. The measured values were adopted as boundary condition for mathematical model. The results show that the air-conditioning performance of the ZCHE is strongly dependent on the water temperature under constant air conditions. The humidification capacity of the ZCHE was measured 25.0 g at 5 kW heat capacity and the humidification capacity was measured 10.2 g at 0.6 kW cooling capacity. The relative errors of mass transfer coefficient and heat transfer coefficient are ±3.6% and ±3.8%, respectively. Moreover, the proposed mathematical model fitted well with measured values.

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Experimental investigation of a novel desiccant cooling system

Hürdoğan

Büyükalaca

Yılmaz

et al. 2010

Energy and Buildings

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Study on Noncondensing Air-Conditioning System Performance When Combining a Desiccant Cooling System with a CO ₂ Heat Pump

Cited by 6 publications

References 5 publications

Field Study on Humidification Performance of a Desiccant Air-Conditioning System Combined with a Heat Pump

Field Study on Humidification Performance of a Desiccant Air-Conditioning System Combined with a Heat Pump

Investigation on heat and mass transfer characteristics for a zeolite-coated heat exchanger using comparatively low-temperature energy: Heating humidification mode and cooling dehumidification mode

Experimental investigation of a novel desiccant cooling system

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Study on Noncondensing Air-Conditioning System Performance When Combining a Desiccant Cooling System with a CO 2 Heat Pump

Cited by 6 publications

References 5 publications

Field Study on Humidification Performance of a Desiccant Air-Conditioning System Combined with a Heat Pump

Field Study on Humidification Performance of a Desiccant Air-Conditioning System Combined with a Heat Pump

Investigation on heat and mass transfer characteristics for a zeolite-coated heat exchanger using comparatively low-temperature energy: Heating humidification mode and cooling dehumidification mode

Experimental investigation of a novel desiccant cooling system

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Product

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Study on Noncondensing Air-Conditioning System Performance When Combining a Desiccant Cooling System with a CO ₂ Heat Pump