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Energy, economic, and environmental (3E) feasibility study of desiccant integrated multistage efficient indirect evaporative air conditioning system configurations in the subtropical climate
Heat and Mass Transfer ( IF 1.7 ) Pub Date : 2021-05-03 , DOI: 10.1007/s00231-021-03082-1
Rubeena Kousar , Ghulam Qadar Chaudhary , Muhammad Kamal Amjad

This paper presents the experimental-based performance evaluation of three different configurations of desiccant integrated direct/indirect evaporative cooling systems. These configurations include (1) Conventional desiccant cooling system with the direct evaporative cooler on process and regeneration sides (Configuration 1); (2) direct evaporative cooler on the process with indirect evaporative cooler (M-Cycle) on regeneration side (Configuration 2); and (3) indirect evaporative cooler (M-Cycle) on process and regeneration sides (Configuration 3). Each configuration is analyzed in terms of process air supply temperature, process air humidity ratio, thermal coefficient of performance (COPth), and energy efficiency ratio (EER). Based on energy, economic and environmental (3E) analysis subjected to an ambient temperature range of 31–40 °C, 18 g/kg ambient humidity and regeneration temperature of 70 °C; Maximum average value COPth of 0.49, 0.8, 1.7 and EER 3, 4.12, 7 were achieved by configuration 1, 2 and 3, respectively. Present worth cost of configuration 3 for 10 h/day operating time is 13% less as compared to a conventional system with a payback period (PBP) of 6.5 years. As compared to configuration 1, the CO2 emission is reduced by 32% and 38% for configuration 2 and configuration 3, respectively. Hence, the energetic, environmental, and economic evaluation revealed that configuration 3 is best amongst all three configurations in subtropical climate conditions.



中文翻译:

副热带地区干燥剂集成多级高效间接蒸发式空调系统配置的能源,经济和环境(3E)可行性研究

本文介绍了基于干燥剂的直接/间接蒸发冷却系统的三种不同配置的基于实验的性能评估。这些配置包括:(1)常规干燥剂冷却系统,在过程侧和再生侧均配有直接蒸发冷却器(配置1);(2)在过程中使用直接蒸发冷却器,在再生侧使用间接蒸发冷却器(M-Cycle)(配置2);(3)过程和再生侧的间接蒸发冷却器(M-Cycle)(配置3)。根据工艺空气供应温度,工艺空气湿度比,性能热系数(COP th)分析每种配置)和能效比(EER)。根据能源,经济和环境(3E)分析,在31–40°C的环境温度范围,18 g / kg的环境湿度和70°C的再生温度下进行;通过配置1、2和3分别获得0.49、0.8、1.7和EER 3、4.12、7的最大平均值COP th。与10天/天的运行时间相比,配置3的当前价值成本与6.5年的投资回收期(PBP)的常规系统相比减少了13%。与配置1相比,配置2和配置3的CO 2排放量分别减少了32%和38%。因此,在能源,环境和经济方面的评估表明,配置3在亚热带气候条件下的所有三种配置中最佳。

更新日期:2021-05-03
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