Full
Outline
This study explores how optimized spacer design enhances heat and mass transfer efficiency in microscale flows within membrane distillation seawater desalination modules. Various microscale flow channels exist inside these modules, such as gaps between spacer filaments and spaces between the membranes, influencing the water production performance of the membrane modules significantly. A lab-scale direct contact membrane distillation system is built to assess key parameters including spacer structure, feed temperature, salt concentration, and flow conditions on permeate flux. Higher feed temperature markedly increases water production. Introducing spacers improves flow distribution near the membrane surface, reducing both concentration and temperature polarization. Optimized spacer structures under high-temperature and high-salinity conditions boost permeate flux by about 30% compared to configurations without spacers. Using spacer 2, the maximum water production can reach up to 15.38 L/(m2
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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