In this work

a solar thermal-photovoltaic hollow fiber membrane distillation system was designed. A 1.82 m2 vacuum tube collector area was used in the solar photothermal system

and 1.63 m2 polycrystalline silicon panel area was used in the solar photovoltaic system. Experimental aspects

the difference of membrane permeate flux in different flow modes of hot liquid under different working conditions was studied. The influence of solar irradiance on the system performance under different tracking systems was studied. The results show that the membrane permeate flux of the feed liquid flowing through the tube pass is greater than the membrane permeate flux of the shell pass

and the temperature of the inlet liquid of the vacuum membrane distillation is most suitably selected as 50—70℃. The temperature of the automatic tracking membrane module inlet is 2—3°C higher than that at the non-tracking mode. The automatic tracking can extend the running time of the membrane distillation system for 1—2 h than the non-automatic tracking system. At the same time

the maximum membrane permeate flux of the automatic tracking mode is 8.89 kg/(m2·h)

which is higher than 4.26 kg/(m2·h) in the non-tracking mode in the same natural environment. Theoretical aspects

the heat and mass transfer process of hollow fiber membrane distillation with water as working fluid was analyzed. The heat transfer theoretical mathematical model of the heat transfer process was established. The quantitative relationship between irradiation intensity

temperature difference of membrane surface

heat transfer coefficient of inner surface of membrane

heat and mass transfer flux were analyzed. The membrane surface temperature and theoretical membrane permeate flux were calculated

and the experimental and theoretical values were compared. The system has stable operation

high energy utilization efficiency and reliable performance

which lays a theoretical and experimental foundation for engineering application.