Numerical simulation analysis of the flow field and convective heat transfer in new super open rack vaporizer

With the rapid development of Chinese natural gas industry, vaporizer as the key equipment is used to regasify LNG to meet the requirement of fuel gas in industrial and domestic purposes. In this paper, a new super open rack vaporizer (SuperORV) model is proposed, added a cross-shaped twisted tape insert to the inner tube based on the conventional vaporizer heat transfer tube. Physical and mathematical models are established, the results from the model exhibit a good agreement with experiment data, which implies the calculation model is reliable. Base on this, the heat transfer process of two kinds of superORV heat transfer tube is simulated numerically. The temperature profiles along the heat transfer tube are obtained, the heat transfer performance and the local heat transfer are analyzed, the heat transfer coefficient profiles against temperature and heat transfer tube length are also discussed. The effects of superORV heat transfer tube with LNG pressure and screw pitch are obtained. The results show that the cross-shaped twisted tape insert has a significant effect on enhancing heat transfer performance of new heat transfer tube. The heat transfer performance of new super open rack vaporizer is visible. (C) 2016 Elsevier Ltd. All rights reserved.