Review of the impact of liquid desiccant dehumidification on indoor air quality

Fu, Huangxi; Liu, Xiaohua

doi:10.1016/j.buildenv.2017.02.014

Cited by 104 publications

(42 citation statements)

References 32 publications

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“…Whilst silica gel, zeolites, aluminas and polymers are solid desiccants, organic desiccant e.g. tri-ethylene glycol (TEG) and inorganic salt solutions such as LiBr, lithium chloride (LiCl), and calcium chloride (CaCl 2 ) are examples of liquid desiccants [33,34]. LDSs involve liquidgas absorption.…”

Section: Liquid Desiccant Systems (Ldss)mentioning

confidence: 99%

“…They have the edge over solid desiccant systems as they can operate at regeneration temperatures, which are very low and they show higher thermodynamic coefficient of performance with lower pressure drops [35]. Compared to traditional vapor compression systems, apart from the advantages of being environmental friendly and heat driven LDSs are more flexible in temperature and humidity controls [34].…”

Section: Liquid Desiccant Systems (Ldss)mentioning

confidence: 99%

“…Adsorption [13] • Simple configuration without moving parts; eco-friendly refrigerants; and suitable for ultra-lowgrade heat recovery and utilization; high energy density of chemisorption • Bulky; solid material related issues, e.g. poor heat and mass transfer within solid sorbent in the fixed bed; modest COP; temperature swing in the fixed bed and the sensible heat load of solid sorbent and metallic reactor; potential performance degradation; intermittency of the basic configuration; and lack of industrialization Absorption [29] • Eco-friendly working fluid; reduce peak power demand; and mitigate greenhouse gas emission issues • Large initial cost; and operational constraints; crystallization and corrosion issue of the working fluid LDS [34,36] • Effective air quality control; high density energy storage; can be driven by ultralow grade heat…”

Section: Technology Advantage Disadvantagementioning

confidence: 99%

See 2 more Smart Citations

State-of-the-Art Technologies on Low-Grade Heat Recovery and Utilization in Industry

Ling‐Chin

Bao

et al. 2019

Energy Conversion - Current Technologies and Future Trends

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To improve energy efficiency in industry, low-grade heat recovery technologies have been advanced continuously. This chapter aims to provide a basic understanding of state-of-the-art technologies for low-grade heat recovery and utilization in industry, which are developed based on the concept of thermodynamic cycles. The technologies include adsorption, absorption, liquid desiccant, organic Rankine cycles (ORC), and Kalina cycles. The definition of low-grade heat sources, the working principle, recent advances in research and development (R&D), and commercial applications of the technologies (if any) will be discussed, followed by concluding remarks on advantages and disadvantages, future outlook, barriers, and opportunities.

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Section: Liquid Desiccant Systems (Ldss)mentioning

confidence: 99%

Section: Liquid Desiccant Systems (Ldss)mentioning

confidence: 99%

Section: Technology Advantage Disadvantagementioning

confidence: 99%

See 1 more Smart Citation

State-of-the-Art Technologies on Low-Grade Heat Recovery and Utilization in Industry

Ling‐Chin

Bao

et al. 2019

Energy Conversion - Current Technologies and Future Trends

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“…Apart from the ingestion, inhalation and skin contact must be checked and avoided. [121]. First, the desiccant solution provides a bacteriostatic and bactericidal function due the fact that used salts are natural biocide and can remove possible virus or bacteria present in the air [10,122].…”

Section: Health Safety and Air Qualitymentioning

confidence: 99%

Thermodynamics and economics of liquid desiccants for heating, ventilation and air-conditioning – An overview

Giampieri

Smallbone

et al. 2018

Applied Energy

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In an effort to minimise electricity consumption and greenhouse gases emissions, the heating, ventilation and airconditioning sector has focused its attention on developing alternative solutions to electricallydriven vapour-compression cooling. Liquid desiccant airconditioning systems represent an energyefficient and more environmentally friendly alternative technology for dehumidification and cooling, particularly in those cases with high latent loads to maintain indoor air quality and comfort conditions. This technology is considered particularly efficient in hot and humid climates. As a matter of fact, the choice of the desiccant solution influences the overall performance of the system. The current paper reviews the working principle of liquid desiccant systems, focusing on the thermodynamic properties of the desiccant solutions and describes an evaluation of the reference thermodynamic properties of different desiccant solutions to identify which thermodynamic, physical, transport property influences the liquid desiccant process and to what extent. The comparison of these thermodynamic properties for the commonly used desiccants is conducted to estimate which fluid could perform most favourably in the system. The economic factors and the effect of different applications and climatic conditions on the system performance are also described. The paper is intended to be the first step in the evaluation of alternative desiccant fluids able to overcome the problems related to the use of the common desiccant solutions, such as crystallization and

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“…Dry coils significantly increase the air quality of HVAC systems. Moreover, the salts employed in TCFs present a strong biocidal and bacteriostatic nature [19]. In surgery rooms, higher humidity values could lead to uncomfortable conditions for surgeons, due to less perspiration through surgical gowns or fogged masks and microscope lenses [18].…”

Section: Humidity Controlmentioning

confidence: 99%

Use Cases with Economics and Simulation for Thermo-Chemical District Networks

Geyer

Delwati

Buchholz³

et al. 2018

Sustainability

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Thermo-chemical networks using absorption and desorption to capture and valorise the potential of very low-grade residual heat (20 • C to 60 • C) to offer a reduction of end user costs and increased primary energy efficiency. The paper demonstrates the technical and economic potential of thermo-chemical networks by defining use cases and their related level of energy efficiency and technological feasibility. Furthermore, specific economic scenarios, including estimations on investment and operation costs, demonstrate the economic benefit of the technology. Simple payback periods between about 0.5 and 7.5 years indicate a good economic feasibility with end user costs below 4 €ct/kWh-equivalent and refunds of 0.5 to 1 €ct/kWh for the required residual heat. Due to the low-temperature characteristics of the relevant systems and services, detailed simulations are required to approve the functioning and viability of the new technology. For this purpose, the paper demonstrates the simulation outline using the example of space heating based on a low-temperature air heating system partially driven with thermo-chemical fuel.

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Review of the impact of liquid desiccant dehumidification on indoor air quality

Cited by 104 publications

References 32 publications

State-of-the-Art Technologies on Low-Grade Heat Recovery and Utilization in Industry

State-of-the-Art Technologies on Low-Grade Heat Recovery and Utilization in Industry

Thermodynamics and economics of liquid desiccants for heating, ventilation and air-conditioning – An overview

Use Cases with Economics and Simulation for Thermo-Chemical District Networks

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