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首页> 外文期刊>International Journal of Heat and Mass Transfer >Performance testing of a novel 3-fluid liquid-to-air membrane energy exchanger (3-fluid LAMEE) under desiccant solution regeneration operating conditions
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Performance testing of a novel 3-fluid liquid-to-air membrane energy exchanger (3-fluid LAMEE) under desiccant solution regeneration operating conditions

机译：新型三液液-气膜换热器（3-液LAMEE）在干燥剂溶液再生操作条件下的性能测试

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摘要

Liquid-to-air membrane energy exchangers (LAMEEs) use semi-permeable membranes to transfer heat and moisture between air and desiccant solution, and prevent the transfer of desiccant droplets to the air-side. A 2-fluid flat-plate LAMEE is composed of several adjacent air and desiccant solution channels each separated by a semi-permeable membrane. A 3-fluid LAMEE is the new generation of LAMEEs which has a structure similar to a 2-fluid flat-plate LAMEE. The novelty of the 3-fluid LAMEE is that it includes titanium tubes inside the desiccant solution channels to control the temperature of the desiccant solution along the exchanger. In this paper, the performances of a 2-fluid LAMEE and 3-fluid LAMEE are tested and compared under diluted desiccant solution regeneration operating conditions. Also studied are the effects of operating conditions (inlet heating water temperature, heating water mass flow rate, desiccant solution mass flow rate, and inlet desiccant solution temperature) on the performances of the 2-fluid and 3-fluid LAMEEs. For the chosen test conditions, results show that effectiveness and moisture removal rate of the 3-fluid LAMEE are higher than the 2-fluid LAMEE under the entire range of inlet heating water temperature, heating water flow rate, and desiccant solution flow rate studied. The effectiveness and moisture removal rate of the 3-fluid LAMEE increase as the inlet heating water temperature and/or flow rate increases. The sensible, latent, and total effectivenesses, and moisture removal rate of the LAMEE increase by 38%, 40%, 39%, and 6 times when the temperature of desiccant solution is maintained constant along the exchanger. Compared with the 2-fluid LAMEE, the sensible, latent, and total effectivenesses, and moisture removal rate of the 3-fluid LAMEE are improved by up to 104%, 141%, 128%, and 17 times, respectively.
机译：液空膜换热器（LAMEE）使用半透膜在空气和干燥剂溶液之间传递热量和水分，并防止干燥剂液滴向空气侧传递。 2流体平板LAMEE由多个相邻的空气和干燥剂溶液通道组成，每个通道均由半透膜隔开。 3流体LAMEE是新一代LAMEE，其结构类似于2流体平板LAMEE。 3流体LAMEE的新颖之处在于，它在干燥剂溶液通道内包括钛管，以控制沿着交换器的干燥剂溶液的温度。在本文中，在稀释的干燥剂溶液再生操作条件下测试并比较了2流体LAMEE和3流体LAMEE的性能。还研究了工作条件（入口热水温度，热水质量流量，干燥剂溶液质量流量和入口干燥剂溶液温度）对2流体和3流体LAMEE性能的影响。在所选的测试条件下，结果表明，在所研究的进口热水温度，热水流量和干燥剂溶液流量的整个范围内，三液LAMEE的有效性和除湿率均高于二液LAMEE。三流体LAMEE的有效性和除湿率随着入口热水温度和/或流量的增加而增加。当干燥剂溶液的温度沿交换器保持恒定时，LAMEE的显着，潜在和总体效率以及除湿率分别提高了38％，40％，39％和6倍。与2液LAMEE相比，3液LAMEE的显着，潜在和总体功效以及除水率分别提高了104％，141％，128％和17倍。

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