Metal-Organic Frameworks as advanced moisture sorbents for energy-efficient high temperature cooling
| Autor: | Xiaoxiao Feng, Christian Serre, Afsaneh Marandi, Farid Nouar, Menghao Qin, Victoria Steggles, Shuqing Cui, Sujing Wang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Cooling load lcsh:Medicine 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Article Heat exchanger Water cooling lcsh:Science Process engineering Condenser (heat transfer) Evaporator Multidisciplinary business.industry lcsh:R Refrigeration Coefficient of performance 021001 nanoscience & nanotechnology 6. Clean water 0104 chemical sciences Air conditioning lcsh:Q 0210 nano-technology business |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-9 (2018) Cui, S, Qin, M, Marandi, A, Steggles, V, Wang, S, Feng, X, Nouar, F & Serre, C 2018, ' Metal-Organic Frameworks as advanced moisture sorbents for energy-efficient high temperature cooling ', Scientific Reports, vol. 8, no. 1, 15284 . https://doi.org/10.1038/s41598-018-33704-4 |
| ISSN: | 2045-2322 |
| Popis: | Latent cooling load accounts for 30% of the total load of air-conditioning, and its proportion is even higher in many tropical and subtropical climates. Traditional vapour-compression air-conditioning (VCAC) has a low coefficient of performance (COP) due to the refrigeration dehumidification process, which often makes necessary a great deal of subsequent re-heating. Technologies using conventional desiccants or sorbents for indoor moisture control are even less competitive than VCAC due to their high regeneration temperature, long cycling time and bulky components. Here, we report a novel high temperature cooling system that uses porous metal-organic frameworks (MOFs) as advanced sorbents for humidity control. We directly coat MOFs on the surface of evaporator and condenser. The system has no additional components compared to a traditional VCAC. The evaporator can simultaneously remove both the sensible and latent loads of the incoming air without reducing the temperature below its dew point. The regeneration of wet MOFs is completely driven by the residual heat from the condenser. The MOF-coated heat exchangers can achieve a cooling power density of 82 W·L−1. We demonstrate that the system has a high COP, up to 7.9, and can save 36.1% of the energy required, compared to the traditional VCAC system with reheating. The amphiphilic MOFs used in the research have high water uptake, are made of low-cost raw materials and have high hydrothermal stability. They thus have the potential for being scaled up for large-scale applications in air conditioning. |
| Databáze: | OpenAIRE |
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