Renewable energy for liquid desiccants air conditioning system: A review

Fekadu, Geleta; Subudhi, Sudhakar

doi:10.1016/j.rser.2018.05.016

Cited by 93 publications

(34 citation statements)

References 57 publications

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“…A significant interest has been paid to developing a liquid desiccant-type air conditioner [ [3] , [4] , [5] , [6] , [7] , [8] , [9] ]; it is estimated that the liquid desiccant air conditioner has at least a 20% lower electric energy versus the conventional compressor-type air conditioners [ [4] , [5] , [6] ]. Furthermore, the liquid desiccant-type air conditioner can be driven with continuous ventilation during the air-conditioning process; this property is expected to avoid the epidemic of the flu, tuberculosis, and any new types of corona virus diseases among people who share the same room during working or living; the liquid desiccant-type air conditioner is a favorable air-conditioner system for schools, hospitals, nursing homes, and supermarkets [ [3] , [4] , [5] , [6] , [7] , [8] , [9] ]. However, the present liquid desiccant-type air conditioniner has a serious weak point that it uses a lithium chloride (LiCl) aqueous solution as the desiccant source [ [3] , [4] , [5] , [6] , [7] , [8] , [9] ].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the liquid desiccant-type air conditioner can be driven with continuous ventilation during the air-conditioning process; this property is expected to avoid the epidemic of the flu, tuberculosis, and any new types of corona virus diseases among people who share the same room during working or living; the liquid desiccant-type air conditioner is a favorable air-conditioner system for schools, hospitals, nursing homes, and supermarkets [ [3] , [4] , [5] , [6] , [7] , [8] , [9] ]. However, the present liquid desiccant-type air conditioniner has a serious weak point that it uses a lithium chloride (LiCl) aqueous solution as the desiccant source [ [3] , [4] , [5] , [6] , [7] , [8] , [9] ]. The LiCl aqueous solution is very caustic to iron or copper, and it easily crystallizes when different salts are added for enhancing the dehumidification ability; this requires expensive corrosion-resistance pipes and prohibits its wide use.…”

Section: Introductionmentioning

confidence: 99%

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Design of quaternary ammonium type-ionic liquids as desiccants for an air-conditioning system

Maekawa¹,

Matsumoto²,

Ito³

et al. 2020

Green Chemical Engineering

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The liquid desiccant air-conditioning system allows reducing energy consumption compared to the conventional compressor-type air conditioners. In order to develop desiccant materials for air conditioners, we have investigated the dehumidification capability of quaternary ammonium Ionic Liquids (ILs) and the equilibrium water vapor pressure of aqueous solutions of these ammonium salts. Among the seven tested types of ILs, 2-hydroxy- N , N , N -trimethylethan-1-aminium dimethylphosphate ([Ch][DMPO 4 ]) displayed the best dehumidification capability and the lowest equilibrium water vapor pressure. Furthermore, the 80% aqueous solution of [Ch][DMPO 4 ] exhibited a less corrosive effect on four types of metals, i.e., steel (hot dip zinc-aluminum alloy plated steel), copper (C1100P), aluminum (A5052), and stainless steel (SUS: SUS304). It should be noted that this [Ch][DMPO 4 ] is not only non-toxic but also exhibits a stable nature; the aqueous solution produced no odor after storing for over 1 year under ambient conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of quaternary ammonium type-ionic liquids as desiccants for an air-conditioning system

Maekawa¹,

Matsumoto²,

Ito³

et al. 2020

Green Chemical Engineering

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show abstract

“…The increased emission of CO2 and other greenhouse gases (GHG) will cause many climatic disturbances because of increase in global temperature. The heating, ventilation and air conditioning (HVAC) system consumes more than 40% of the total energy consumption of the building; and consume about 60% of the total energy consumption of commercial buildings in the tropical region [1,2,3]. Currently, the air conditioning market is dominated by vapor compression systems (VCS).…”

Section: Introductionmentioning

confidence: 99%

“…Owing to the fact that the most common form of electrical generation in the majority of counties is from the combustion of fossil fuels, VCS can be viewed as neither a sustainable nor efficient air conditioning option [4]. Therefore, it is necessary to find out the ways of reducing overall energy consumption of such power-hungry systems [1]. (LDAC) system represents one of the technologies for heating/cooling, able to be driven by the heat coming from low-temperature renewable energy sources.…”

Section: Introductionmentioning

confidence: 99%

Experimental performance of a solar thermal liquid desiccant air conditioning system – A review

Bouzenada¹

2024

RE&PQJ

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Solar energy may be the great option to provide the conditioned air in summer, as solar energy available in plenty. Liquid desiccant air conditioning (LDAC) system using solar energy is proposed as an alternative to the conventional vapor compression systems due to its advantage in, removing the air latent load, friendly to environment, removing of pollutants from the process air, reduction of the electrical energy, do not using the harmful refrigerants and protection to ozone layer depletion. In this paper, the recent works on solar driven liquid desiccant air conditioning system and its advantages are reviewed. The system may offer in terms of energy savings are underscored. A basic description of (LDAC) system is provided. The regeneration temperature and solar collector efficiency are developed and the analysis highlights the performance of the system. The literature review has highlighted that there is a clear need for research in the field of liquid desiccant air conditioning system with solar energy in many buildings. This is due to the patent operational advantages the system can deliver in terms of energy saving from 25 to 50%, operating costs and energy security, the low regeneration temperature. The objective of this paper review is to access using of liquid desiccant based air conditioning, regenerated by eco-friendly renewable energy. The liquid desiccant systems present multifunctional properties that make them particularly interesting in several fields of application. Electric utilities have their peak loads in hot summer and are often barely capable of meeting the demand, with brown-out situations. It is a good application for solar energy due to the fact that the greatest demand for air conditioning occurs during times of highest insolation.

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“…It is playing a progressively prominent role in air conditioning systems. 8 The moisture absorption potential of various other desiccant solutions like aqueous solutions of LiCl, LiBr, KCOOH, and CaCl 2 have been investigated by many researchers in the past. 9,10 It is observed that LiCl solution offers the best performance among the commonly used desiccant solutions.…”

Section: Introductionmentioning

confidence: 99%

Thermal energy analysis on liquid desiccant air conditioning system at different desiccant solution parameters

Reddy

Balasubramanian

Chandramohan

2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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Selection of suitable liquid desiccant operating parameters plays a significant role in the design of energy efficient liquid desiccant air conditioning system. To achieve same dehumidification rate from ambient air, different combinations of solution parameters (heat capacity ratio, concentration, and vapor pressure) could be employed in the system. Considering dehumidifier air inlet condition and dehumidification rates are fixed, an analytical study is carried out on the thermal energy analysis of the system at different solution operating parameters. Operating parameters considered in this study are solution concentrations ( Cs = 0.25, 0.3, 0.35 and 0.40) and heat capacity ratios ([Formula: see text] = 2.5, 3, 4 and 5). Control volume which includes a pair of air and solution channels (half width channels) of full scale liquid-to-air membrane energy exchangers (LAMEE) has been chosen to analyze the energy transfer between air and solution. The results indicate system requires lesser chiller load ( Qchiller) at high concentration and low heat capacity ratio ( Cs = 0.40 and [Formula: see text] = 2.5) which is 0.29 kW to achieve 0.61 kW cooling load. This is 99% lesser than the Qchiller at high concentration and high heat capacity ratio ( Cs = 0.40 and [Formula: see text] = 5) and 30% lesser than the Qchiller at low concentration and low heat capacity ratio ( Cs = 0.25 and [Formula: see text] = 2.5). Solution heat addition rate ( Qadd) per kW cooling capacity ( Qcc) at this solution condition is found as 0.85 kW.

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Renewable energy for liquid desiccants air conditioning system: A review

Cited by 93 publications

References 57 publications

Design of quaternary ammonium type-ionic liquids as desiccants for an air-conditioning system

Design of quaternary ammonium type-ionic liquids as desiccants for an air-conditioning system

Experimental performance of a solar thermal liquid desiccant air conditioning system – A review

Thermal energy analysis on liquid desiccant air conditioning system at different desiccant solution parameters

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