| Summary: | 碩士 === 長庚大學 === 化工與材料工程研究所 === 97 === Solar radiation can be transferred to thermal energy by collectors and used to solar thermal energy systems. Recently, desalination process driven by solar power was expansively developed and drew attention by the academy and industry. Membrane distillation (MD) process has cheaper operation costs than reverse osmosis (RO) and multi-stage flash (MSF) technologies which are widely used. There are potentially commercial advantages to use membrane distillation driven by solar power.
This work studies dynamic modeling of flat-plated collector and two fully mixed storage tanks with heat exchangers and auxiliary power, and deals with three circular conditions. Optimal system sizes and operated conditions are than discussed with reference data of membrane distillation module. The system can be reached 50 L/day of distilled water under 0.2 kg/s of circular flow rate of collector, 36 m2 of collector area, 1200 L of storage tanks and 4 m2 of heat exchanger area.
This study also proposes feedback control loops for the solar thermal energy system and try to tune the suitable PI controller parameters. According to surrounding climate data of Taipei city, simulation results demonstrate effective performance of the proposed control loops for the solar thermal energy systems.
|
|---|
