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Effects of liquid-desiccant air conditioning processes on the presence of inhalable particles in the air

机译:液干燥剂空调过程对空气中可吸入颗粒的存在的影响

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Liquid desiccant is a new means of controlling air humidity with significant energy-saving potential. However, direct contact between the salt solution and the treated air may cause carryover droplets that degrade the indoor air quality, and this is a major obstacle to widespread application. This paper experimentally investigates how dehumidification and regeneration using LiCl solution affect the mass concentration of micro-particles in the treated air. The results show that dehumidification tends to remove micro-particles with sizes of 0?2.5 ?m rather than carryover droplets, especially for PM2.5 by 7.73%. However, larger micro-particles with sizes of 2.5?10 ?m are generated during regeneration of the liquid desiccant, which indicates that the change in the amount of micro-particles depends on the direction of moisture migration. Increasing the rate of air or solution flow increases moisture migration during regeneration to release more micro-particles. Additionally, the amount of micro-particles released during counter flow is less than that during parallel flow, because the larger particles settle down during the former. This investigation should help to understand the behavior of carryover droplets in liquid-desiccant air-conditioning systems and inspire new methods for controlling humidity and particles.
机译:液体干燥剂是一种控制空气湿度的新方法,具有显着的节能潜力。然而,盐溶液和处理过的空气之间的直接接触可能导致降解室内空气质量的携带液滴,这是广泛应用的主要障碍。本文通过实验研究了使用LICL溶液的除湿和再生如何影响处理空气中微粒的质量浓度。结果表明,除湿化倾向于去除尺寸为0≤2.5Ω的微粒,而不是携带液滴,特别是对于PM2.5达7.73%。然而,在液体干燥剂的再生期间产生较大的微颗粒,其尺寸为2.5?10?m,这表明微粒量的变化取决于水分迁移的方向。增加空气或溶液流动速率增加了再生期间的水分迁移,以释放更多的微粒。另外,在逆流期间释放的微粒的量小于平行流动期间的微粒,因为较大的颗粒在前者期间沉降下降。这项调查应有助于了解液体干燥剂空调系统中的携带液滴的行为,并激发用于控制湿度和颗粒的新方法。

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