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Experimental Study of Effects of Phase-Change Energy and Operating Parameters on Performances of Two-Fluid and Three-Fluid Liquid-to-Air Membrane Energy Exchangers 相变能和操作参数对双流体和三流体液-气膜能量交换器性能影响的实验研究
液-气膜能量交换器(LAMES)用于在空气和干燥剂溶液流之间传递热量和水分。LAMES使用半渗透膜来防止干燥剂液滴渗透到气流中。当LAME用于空气冷却和除湿时,当干燥剂溶液从潮湿气流中吸收水分时,相变能量被释放。因此,当干燥剂溶液沿着交换器流动时,其温度升高,从而降低了Lamee的性能。三流体LAME是一种新型的LAME,包括一个制冷剂回路,用于冷却/加热沿换热器的洗涤液。 本文的主要贡献在于,首次展示了在空气冷却和除湿操作条件下,液体干燥剂能量转换器中释放的相变能量对空气和干燥剂溶液流温度的影响。在空气冷却和除湿工况下,实验研究和比较了相变能对双流体和三流体LAME性能的影响。此外,还测试了进气湿度比和干燥剂溶液流量对双流体LAME和三流体LAME性能的影响。引文:2016年冬季会议,佛罗里达州奥兰多,2016年交易,第122卷第。 1
Liquid-to-air membrane energy exchangers (LAMEEs)are used to transfer heat and moisture between air and desiccantsolution streams. LAMEEs use semipermeablemembranes to prevent the penetration of desiccant droplets tothe airstream.When a LAMEE is used for air cooling and dehumidifying,the energy of phase change is released as the desiccantsolution absorbs moisture from the humid airstream.Consequently, the temperature of the desiccant solutionincreases as it flows along the exchanger, which decreases theLAMEE’s performance. A three-fluid LAMEE is a novel typeof LAMEE that includes a refrigerant circuit to cool/heat thedesiccant solution along the exchanger. The main contributionof this paper is that it shows, for the first time, the effects of theenergy of phase change released in liquid desiccant energyexchangers on the temperatures of the air and desiccant solutionstreams under air-cooling and dehumidifying operatingconditions. The effects of phase-change energy on the performancesof a two-fluid LAMEE and a three-fluid LAMEE areexperimentally investigated and compared under air-coolingand dehumidifying operating conditions. Also tested are theeffects of inlet air humidity ratio and desiccant solution flowrate on the performances of the two-fluid LAMEE and threefluidLAMEE.
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