A set of experimental facilities was set up to measure the heat transfer coefficient of horizontal-tube falling film evaporator.The effects of spray density on the topmost row Γ and evaporating temperature T on the overall heat transfer coefficient K are studied.The heat transfer coefficient distribution in the evaporator is presented.The results indicate that increase of spray density and evaporating temperature helps to enhance the value of K.Along the axial direction of the tube
K increases at the first 5 m and then decreases in the following 3 m
mainly caused by the condensation inside the tube.The K value decreases from the upper rows to the lower rows.In addition
increase of number of tube rows reduces the K value