Study on the Optimal Cooling Power for the Internally Cooled Ultrasonic Atomization Dehumidifier with Liquid Desiccant
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In this work, performance simulations on the internally cooled ultrasonic atomization system (IC-UADS) were carried out to clear the effects of the input cooling power on promoting the dehumidification performance. The performance model was established based on the conservation laws of mass and energy, together with the sensible heat balance equation, and then well-validated within the constructed IC-UADS. Three indices, namely the dehumidification effectiveness, the moisture removal rate, and the specific moisture removal rate per cooling power were employed. It was found that though the dehumidification performance was growing continuously with the rise of cooling power, the increase rate was descending significantly. Considering the balance between the cooling power consumption and the dehumidification performance improvement, the optimal power input, around 0.53 kW for the current IC-UADS, was figured out for energy-efficient performance improvement. The results may help clarify the necessary cooling power input and optimize the operation of the internally cooled liquid desiccant systems.
KeywordsInternal cooling Ultrasonic atomization Liquid desiccant Optimal cooling Dehumidification
Specific thermal capacity, (kJ/(kg K))
Humidity ratio, (g/kg dry air)
Mass flow rate, (kg/s)
Molar mass, (g/mol)
Desiccant mass fraction, (%)
This work is financially supported by the Shanghai Sailing Program (No. 19YF1401800), the Fundamental Research Funds for the Central Universities of China (No. 2232018D3-36), and the China Postdoctoral Science Foundation (No. 2018M630385).