Primary Research On The Air-conditioning System Regenerating Liquid Absorbent With Electrodes

There has been growing more and more concerns about the energy crisis,building energy consumption accounts for a great proportion,therein air conditioning energy-saving is one of the most direct and effective methods.Compared to the traditional compression air-conditioning,liquid desiccant cooling system gives rise to much attention because it is independent humidity control air-conditioning with good energy saving potential.However,the conventional solar thermal regeneration method is discontinuous and depended on environment,so the solar thermal regeneration system cannot meet the dehumidification requirements all the way.For the sake of improving the performance and dependability of solar thermal regeneration system,a capacitive deionization regeneration method driven by photovoltaic power is proposed and the theoretical and experimental research have been made on it.In the theoretical section,we construct the flow chart and research the circulation process of CDI based system,then set up the thermodynamic model of it.The simulation is presented for ion transfer so obtain concentration field and electric potential field within the electrode pore and stagnant diffusion layer of CDI.And taking proper model to predict the dynamic response of the effluent concentration and deriving the influence factors.After that,we make analysis on the performance and expose the influences of solution concentration,voltage and energy recovery strategy of system COP.And make the performance of new system compared with the traditional thermal regeneration system.In the experimental section,the experimental equipment has been taken to test the CDI regeneration method,mainly considering about the influence factors of solution concentration and flow on the regeneration performance.The result shows that new system can avoid instability of solar thermal regeneration system and improve the renewable energy utilization.It has great potential for that energy consumption can be reduced by half compared to traditional system irrespective of solar energy conversion rate.The actual charge efficiency is higher in the lower concentration range,Membrane capacitive deionization could solve the inefficiency problem of high concentration,thereby ensuring better regeneration effect of new system.