Abstract：
The advent of spray heat exchanger for sewage heat pump system(SHPS) has had a significant improvement on the heat extraction from the sewage and fouling control and removal, in contrast to the conventional submerged-tube heat exchanger and the shell and tube heat exchanger. The falling film flow state on sewage-side surface of the spray heat exchanger plays a key role in the processes to achieve high heat transfer and the high efficiency of heat extractions from the sewage. The conditions of the experiment related to the conditions when the exchanger extracted the heat from sewage. The flow state of the falling film on and between the multiple horizontal tubes of 100 mm long was investigated. The correlations of the Re and the tube distances to the flow state were studied. The Re in the experiment was from100 to 600.
NA Wei,SONG Yan,LU Zuo-long et al. EXPERIMENTAL INVESTIGATION ON FLOW STATE OF FALLING FILM ON HORIZONTALTUBE OF SPRAY HEAT EXCHANGER FOR SEWAGE HEAT PUMP SYSTEM[J]. Architecture Technology, 2014, 45(11): 988-.
