ISSN Online: 2377-424X
ISBN Print: 978-1-56700-474-8
ISBN Online: 978-1-56700-473-1
International Heat Transfer Conference 16
AN EXPERIMENTAL INVESTIGATION OF STEAM CONDENSATION ON OUTER SURFACE OF HORIZONTAL TUBES WITH DIAMETERS GREATER THAN CAPILLARY LENGTH
摘要
Effects of gravity and surface tension on filmwise /dropwise condensation of steam on raw/ oil infused nanograss (OIN) film coated outer surfaces of horizontal stainless steel tubes, with outer diameters greater than the capillary length of water (2.5mm at 100 °C) are investigated experimentally. Experiments were carried out with a constant coolant flow rate of 0.6 L/min of water in the tube, and results show that heat transfer always increased with a decreasing diameter, regardless of film condensation or dropwise condensation. Compared with film condensation, impact of tube outer diameter on heat transfer performance of dropwise condensation is small.