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Yang S.-N.,Inner Mongolia University of Technology | Yang X.-H.,Inner Mongolia University of Technology | Tian R.,Inner Mongolia University of Technology | Tian R.,Renewable Energy Laboratory in Inner Mongolia | And 2 more authors.
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2014

Through the analysis of membrane distillation process and thermoelectric refrigeration, it is found that the sufficient and necessary conditions for the coupling are sufficient refrigerating capacity provided by thermoelectric refrigerator and high temperature difference. Based on the coupling calculation, the coupling characteristic parameters, coupling condition and the optimal coupling conditions are defined, and the general form of coupling characteristic parameters equation is established. The solution of the equation shows that the maximum predictive membrane distillation flux firstly increases and then decreases with the increase of the refrigeration temperature Tc. The maximum predictive membrane distillation flux goes to 65.99 kg/(m2·h) when the refrigeration temperature Tc is 279.65 K, and the feed temperature Tf in the hot chamber is 362.15 K. The investigation of the paper establishes the foundation for experimental research of air gap membrane distillation system with thermoelectric refrigeration.


Zhao X.-Y.,Inner Mongolia University of Technology | Du Y.-Q.,Inner Mongolia University of Technology | Wang F.,Inner Mongolia University of Technology | Han X.,Inner Mongolia University of Technology | And 2 more authors.
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2016

The use of high-grade solar energy is the world's solar energy utilization hotspot. For the characteristics of low energy flux density from which the sun reaches the ground, a focused approach to be adopted. In order to make the incident of solar energy be more efficient, it is necessary to reasonably assign energy flux density which is received by the collector. In this paper, a temperature testing disc of 500 mm in diameter is designed and mounted on the condenser of the dish solar collector. The temperature distribution on the focal plane of the condenser is experimentally tested which lays the reference and basis for the post-optimized for the absorber. © 2016, Science Press. All right reserved.


Yang X.-H.,Inner Mongolia University of Technology | Tian R.,Inner Mongolia University of Technology | Tian R.,Renewable Energy Laboratory in Inner Mongolia | Gao H.,Inner Mongolia University of Technology | Qi X.-J.,Inner Mongolia University of Technology
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2013

Using computational fluid dynamics (CFD) and water as testing solution, thermal chamber flow field numerical simulation with different variable structure parameters of rotating tangential inflow duckbilled nozzle in the membrane module has been done. Through the comparison with the velocity, the magnitude and the temperature near membrane surface, the optimal arrange plan of the nozzle has been concluded. It has been Proved that duckbilled nozzle can largely reduce the temperature gradient of heat transfer boundary layer between fluid and the membrane surface, and enhance mass transfer. The conclusion provides theory basis for optimizing and improving the design of the membrane distillation module.


Hu J.-H.,Inner Mongolia University of Technology | Tian R.,Inner Mongolia University of Technology | Tian R.,Renewable Energy Laboratory in Inner Mongolia | Yang X.-H.,Inner Mongolia University of Technology | And 3 more authors.
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2015

The paper designs a new semiconductor refrigeration air gap membrane distillation system, which is composed organically of the cold chamber of semiconductor refrigeration and the hot chamber of membrane distillation system.The influence of membrane flux on the input current of semiconductor, cooling water flow and hydrothermal temperature is investigated experimentally. As shown the experiments, the flow of cooling water is 900 L/h, the input current of semiconductor refrigeration is 8 A, the average temperature of the cold wall is 5℃, the maximum temperature difference of every measuring point in the cold wall is 0.5℃, the cold wall is temperature uniformity; The input current of semiconductor refrigeration is 8~12 A, the flow of cooling water is 300 L/h, the membrane flux increases with the increase of the input current of semiconductor. These results lay a foundation for theory and applicatioon research on small air gap membrane distillation system of semiconductor refrigeration. © 2015, Science Press. All right reserved.


Feng Z.,Inner Mongolia University of Technology | Wang Y.,Inner Mongolia University of Technology | Wang Y.,Renewable Energy Laboratory in Inner Mongolia | Wu L.,Inner Mongolia University of Technology | And 4 more authors.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2015

The output characteristics of PV modules will be seriously affected by partial shading. To analysze the extent and rules of the effect, a series of experiments including variable shading ratio experiments and different shading mode experiments under specific shading ratio were carried out. The variable shading ratio experimental results show that the lager the shadow ratio of PV modules is, the worse the output characteristics is. The descending slope of the individual curve increases sharply when the shading ratio of PV modules exceeds 10%. When the shading ratio surpasses 20%, the maximum power point Pm is close to zero, and the typical curves are no more complete. Furthermore, the effect of distinctive shading modes in 10% shading ratio on the output characteristics and output power was also analyzed. The results show that the Pm of PV modules decreases with the increase of shading ratio of the cells, and the power loss of the PV modules under distinctive shading modes has been given. ©, 2015, Science Press. All right reserved.


Yang X.,Inner Mongolia University of Technology | Tian R.,Inner Mongolia University of Technology | Tian R.,Renewable Energy Laboratory in Inner Mongolia | Ma S.,Inner Mongolia University of Technology | Lu H.,Inner Mongolia University of Technology
Chinese Journal of Environmental Engineering | Year: 2013

A stacked AGMD module with rotational flow structure was designed to investigate the membrane pollution situation, when the hot working medium was NaCl solution of 20 g/L and 70°C. The experimental results showed that membrane pollution appeared faster on membrane module under the high temperature condition in one experimental period of intermittent and continuous operation, after eight experimental periods, the flux dropped down to 42% of initial flux. The membrane surface was covered by a large number of yellow attachments. The SEM analysis showed that the yellow attachments were uneven accumulated granular pollutants and cuboid crystals. The EDS analysis showed that the pollutants had a minimum amount of Na and Cl element of NaCl crystallization, and also some O, C, Mg, Cu, Fe elements. The inorganic-scale precipitation on the fouling membrane can be wiped off with 5% hydrochloric acid solution, and the effect is good.

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