EXPERIMENTAL STUDY ON ENERGY THRIFT IN A FLUIDIZED BED DRYER WITH SELF-EXCITED MODE OSCILLATING-FLOW HEAT PIPE (SEMOS HEAT PIPE)

This paper presents an experimental study on the properties of the SEMOS heat pipe heat exchanger, which is to be applied into a fluidized bed drying system to recover the heat in the exhaust gas. The SEMOS heat pipe was made from copper with an inner diameter of 3 mm. Distillated water was used as the working liquid. The influences of gas flow type, position of heat source and gas flow rates on the property of the SEMOS heat pipe heat exchanger were investigated. The experimental results showed that the heat exchange capacity of a SEMOS heat pipe heat exchanger is about 4 times of a common tube heat exchanger; count-current gas flow, bottom heat source position and high gas flow rate give high heat flux. It was also found that, in the case of top placed heat source, the SEMOS heat pipe heat exchanger still well works.