Modeling analysis on solar steam generator employed in multi-effect distillation (MED) system
- 35 Downloads
Recently the porous bilayer wood solar collectors have drawn increasing attention because of their potential application in solar desalination. In this paper, a thermodynamic model has been developed to analyze the performance of the wood solar collector. A modeling analysis has also been conducted to assess the performance and operating conditions of the multiple effect desalination (MED) system integrated with the porous wood solar collector. Specifically, the effects of operating parameters, such as the motive steam temperature, seawater flow rate, input solar energy and number of effects on the energy consumption for each ton of distilled water produced have been investigated in the MED desalination system combined with the bilayer wood solar steam generator. It is found that, under a given operating condition, there exists an optimum steam generation temperature of around 145°C in the wood solar collector, so that the specific power consumption in the MED system reaches a minimum value of 24.88 kWh/t. The average temperature difference is significantly affected by the solar heating capacity. With the solar capacity increasing from 50 kW to 230 kW, the average temperature difference increases from 1.88°C to 6.27°C. This parametric simulation study will help the design of efficient bilayer wood solar steam generator as well as the MED desalination system.
Keywordssolar energy steam generating multi-effect desalination
Unable to display preview. Download preview PDF.
This work was financially supported by the National Science Foundation in US (award #1706777) and China Scholarship Council.
- 4.Cipollina A, Micale G, Rizzuti L. Seawater Desalination: Conventional and Renewable Energy Processes. Berlin: Springer, 2009Google Scholar
- 19.ScienceDaily. Solar-powered devices made of wood could help mitigate water scarcity crisis. 2017–10–17, https://doi.org/www.sciencedaily.com/releases/2017/10/171010224556.htm
- 20.The Chemical Engineer. Wood improves solar steam generation. 2017–11–16, https://doi.org/www.thechemicalengineer.com/news/woodimproves-solar-steam-generation/
- 23.Peng G, Ding H, Sharshir S W, Li X, Liu H, Ma D, Wu L, Zang J, Liu H, Yu W, Xie H, Yang N. Low-cost high-efficiency solar steam generator by combining thin film evaporation and heat localization: both experimental and theoretical study. Applied Thermal Engineering, 2018, 143: 1079–1084CrossRefGoogle Scholar
- 27.El-Dessouky H T, Ettouney H M. Fundamentals of Salt Water Desalination. Elsevier Science, 2002Google Scholar