Heat and mass transfer performance comparison between a direct-contact liquid desiccant packed bed and a liquid-to-air membrane energy exchanger for air dehumidification
| Autor: | Mohamed R.H. Abdel-Salam, Ahmed H. Abdel-Salam, Carey J. Simonson, Gaoming Ge, Robert W. Besant |
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| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Pressure drop Packed bed Environmental Engineering Materials science Atmospheric pressure 020209 energy Drop (liquid) Thermodynamics 02 engineering and technology Building and Construction Moving bed heat exchanger Chemical engineering Mass transfer 0202 electrical engineering electronic engineering information engineering Micro heat exchanger Plate fin heat exchanger |
| Zdroj: | Science and Technology for the Built Environment. 23:2-15 |
| ISSN: | 2374-474X 2374-4731 |
| DOI: | 10.1080/23744731.2016.1203712 |
| Popis: | Entrainment of liquid desiccant droplets into the airstream and flow maldistribution are two challenges for liquid desiccant packed beds. Liquid-to-air membrane energy exchangers are novel liquid desiccant exchangers that have the potential to overcome these challenges by using membranes to separate the air and solution flows but have higher heat and moisture transfer resistances. As a new contribution of this study, the heat mass transfer performance of these two exchangers with the same volume and operating condition are compared at two conditions: (1) with the same pressure drop on the air side and (2) with the same total heat/mass transfer area. Results show that liquid-to-air membrane energy exchanger gets up to 13 and 20% higher latent and total effectiveness respectively than the packed bed at the same air pressure drop. Reversely, the packed bed achieves up to 16% higher mass transfer performance than the liquid-to-air membrane energy exchanger with the same heat/mass transfer area. The flow maldi... |
| Databáze: | OpenAIRE |
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