State-of-the-art in liquid desiccant air conditioning equipment and systems

Abdel-Salam, Ahmed H.; Simonson, Carey J.

doi:10.1016/j.rser.2015.12.042

Cited by 116 publications

(51 citation statements)

References 41 publications

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“…Because of these advantages, many research efforts have been applied on the applications of desiccant cooling cycles [18,19]. The most popular desiccant cooling system is the Munters environmental control (MEC) cycle [20].…”

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confidence: 99%

Parametric Analysis of a Rotary Type Liquid Desiccant Air Conditioning System

et al. 2016

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Now days, air conditioning systems are a must for almost every commercial and residential building to achieve comfortable indoor conditions. The increasing energy demand, and increasing oil prices and pollution levels raise the need for alternative air conditioning systems which can efficiently utilize renewable energy resources. The liquid desiccant-based air conditioning method is pollution free and thermal energy-based cooling techniques can use low grade thermal energy resources like solar energy, waste heat, etc. These systems have an additional advantage of cleaning bacteria and fungi from the air. In this paper, a newly proposed rotary liquid desiccant air conditioning system has been investigated theoretically. Most direct contact liquid desiccant cooling systems have the problem of desiccant carryover which can be eliminated using the proposed system. The effects of various key parameters and climatic conditions on the performance of the system have been evaluated. The results showed that if the key parameters of the system are controlled effectively, the proposed cooling system has the ability to achieve the desired supply air conditions. The system can achieve high coefficient of performance (COP) under different conditions. The dehumidifier has a sensible heat ratio (SHR) in the range of 0.3-0.6 for different design, climatic, and operating conditions. The system can remove latent load efficiently in applications which require good humidity control.

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confidence: 99%

Parametric Analysis of a Rotary Type Liquid Desiccant Air Conditioning System

et al. 2016

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“…Therefore, most of the conventional membrane desiccant systems are not suitable for personal VDC application because these are oversize and overweight. 31 The aforementioned personal VDC garment developed in our group consists of four main components: a desiccant layer, a spacer, a water layer, and an outer bag. 26 This VDC garment is designed to operate in a batch mode with initialization by a vacuum pump in the beginning and able to operate for a given period of time free of electricity or any moving parts before the desiccant layer is regenerated and the water reservoir recharged.…”

Section: Vacuum Vapor Absorption Test For Mdf Padmentioning

confidence: 99%

Development of Membrane-Based Desiccant Fiber for Vacuum Desiccant Cooling

Yang

Rana

Lan

et al. 2016

ACS Appl. Mater. Interfaces

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A novel hydrophobic membrane-based desiccant fiber (MDF) was developed by loading lithium chloride into hydrophobic hollow fiber membranes. The MDF thus made was then tested for vapor absorption under controlled conditions. Furthermore, an MDF pad, which was made by weaving MDF into a piece of garment, was built into a laboratory vacuum desiccant cooling (VDC) setup, which included the MDF pad as the desiccant layer and a cooling towel saturated with water as the water reservoir, to test the cooling effects at atmospheric pressure and vacuum of 25 in. of Hg. Results indicate that MDF is suitable for applications such as in VDC. Mass and heat transfer of vapor absorption by MDF were also analyzed.

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“…Therefore, the LDCS can not only make use of renewable energy, but also meet people's increasing pursuit of indoor thermal comfort more efficiently. As a result, it draws increasing attention worldwide in recent years [1][2][3][4]. Compared with the intense attention on the absorber [3,4], the regenerator has relatively limited research.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, it draws increasing attention worldwide in recent years [1][2][3][4]. Compared with the intense attention on the absorber [3,4], the regenerator has relatively limited research. Even though these two components have similar working principle, many differences exist in the actual operating conditions, such as the concentration of solution, working temperature, etc.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Regeneration and Corrosion Characteristics of an Anodized Aluminum Plate Regenerator

et al. 2018

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Abstract:The traditional vapor compression cooling system (VCS) has been criticized for its heavy reliance on electricity consumption and limited control ability of humidity. Compared with the VCS, the liquid desiccant cooling system (LDCS) is more efficient by handling the sensible and latent load separately. The present study investigated the regeneration and corrosion characteristics of an anodized aluminum plate regenerator for the first time. Comparative tests were conducted to present the regeneration and corrosion characteristics of the normal and anodized regenerator. The influence of internal heating on the regeneration performance was also identified. The results showed that the corrosion rate was reduced from 0.0005218 mm/year for normal aluminum to 0.000011 m/year for anodized one under the same operating conditions. However, pitting corrosion was observed at operating conditions with high solution temperature, as the anodized layer of anodized aluminum was damaged due to the high temperature. Compared with the normal aluminum regenerator, the anodized one had an average enhancement of 24% and 23.7% in terms of regeneration rate and effectiveness, respectively. It was attributed to the increment of surface energy from 26.4 mN/m for normal aluminum to 47.6 mN/m for anodized plate. Besides, it was found that, compared with adiabatic one, the internally-heated regenerator improved the regeneration rate by 6.0%~38% and the regeneration effectiveness by 6.3%~32% depending on the operating conditions. The advantage of present study is that it can guide the design of anodized aluminum regenerator for LDCS.

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State-of-the-art in liquid desiccant air conditioning equipment and systems

Cited by 116 publications

References 41 publications

Parametric Analysis of a Rotary Type Liquid Desiccant Air Conditioning System

Parametric Analysis of a Rotary Type Liquid Desiccant Air Conditioning System

Development of Membrane-Based Desiccant Fiber for Vacuum Desiccant Cooling

Investigation on the Regeneration and Corrosion Characteristics of an Anodized Aluminum Plate Regenerator

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