Single CMOS sensor system for high resolution double volume measurement applied to membrane distillation system

M. G. Lorenz; M. A. Izquierdo-Gil; R. Sanchez-Reillo; C. Fernandez-Pineda

doi:10.1117/12.704324

29 January 2007 Single CMOS sensor system for high resolution double volume measurement applied to membrane distillation system

M. G. Lorenz, M. A. Izquierdo-Gil, R. Sanchez-Reillo, C. Fernandez-Pineda

Author Affiliations +

Proceedings Volume 6491, Videometrics IX; 64910P (2007) https://doi.org/10.1117/12.704324
Event: Electronic Imaging 2007, 2007, San Jose, CA, United States

Abstract

Membrane distillation (MD) [1] is a relatively new process that is being investigated world-wide as a low cost, energy saving alternative to conventional separation processes such as distillation and reverse osmosis (RO). This process offers some advantages compared to other more popular separation processes, such as working at room conditions (pressure and temperature); low-grade, waste and/or alternative energy sources such as solar and geothermal energy may be used; a very high level of rejection with inorganic solutions; small equipment can be employed, etc. The driving force in MD processes is the vapor pressure difference across the membrane. A temperature difference is imposed across the membrane, which results in a vapor pressure difference. The principal problem in this kind of system is the accurate measurement of the recipient volume change, especially at very low flows. A cathetometer, with up to 0,05 mm resolution, is the instrument used to take these measurements, but the necessary human intervention makes this instrument not suitable for automated systems. In order to overcome this lack, a high resolution system is proposed, that makes automatic measurements of the volume of both recipients, cold and hot, at a rate of up to 10 times per second.

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M. G. Lorenz, M. A. Izquierdo-Gil, R. Sanchez-Reillo, and C. Fernandez-Pineda "Single CMOS sensor system for high resolution double volume measurement applied to membrane distillation system", Proc. SPIE 6491, Videometrics IX, 64910P (29 January 2007); https://doi.org/10.1117/12.704324

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