Humidification-dehumidification spray column direct contact condenser— Part Ⅱ: Experimental co-current flow

摘要

An experimental set up is designed and constructed to investigate the Humidification-Dehumidification (HDH) Co-current Direct Contact Condenser spray column (CDCC). The results obtain that, the inlet hot humid air temperature has a great influence on the condensate. As the inlet humid air temperature rise from 40 to 70 degrees C the condensate increases approximately more than 4 times at constant cooled spray water and hot humid air mass fluxes. The increase of humid air mass fluxes from 0.158 to 0.316 kg/m2 center dot s redoubles the condensate at the same inlet humid air temperature. The increase of the cooled spray water mass fluxes increases the condensate, where there is no radical increase of condensate at liquid mass flux above 5 kg/m(2)center dot s. Therefore, there is an optimum value of the spray water mass flux. Also, the results show good agreement between experimental measurements and theoretical predictions of condensate, where the deviation doesn't exceed 7%. Comparison between co-current and counter current flow of the condensate is theoretically obtained, which reveals no advantage between the two systems. A case study of a contiguous co-generation electricity and water desalination by HDH in Nuclear or conventional Power Plants show that the HDH productivity can reach 15 m3/d center dot m(2).