化工学报2016，Vol.67Issue(10)：4095-4103,9.DOI:10.11949/j.issn.0438-1157.20160350
沉浸式汽化器壳程流体传热实验与数值模拟
Experimental study and numerical simulation on shell side fluid heat transfer in submerged combustion vaporizer
摘要
Abstract
Submerged combustion vaporizer (SCV) is frequently applied for peaking systems of LNG receiving terminals, which both liquid flow and heat transfer characteristics of water bath on shell side of a vaporizer are key factors to determine whether the SCV could achieve high heat transfer efficiency. Influences of initial water level, volumetric flow rate and inlet temperature of flue gas on heat transfer coefficient of the water bath were investigated by visualization experiments and numerical simulation. The water bath absorbed sensible heat of the flue gas and latent heat of the steam condensation so that the temperature of outlet flue gas almost equaled to the equilibrium temperature of the water bath. Under the inductive impact of a great deal of heat transfer-generated bubbles, cycling water flows, which were formed by weir overflow in the water bath, could effectively collide tubular wall, decrease thickness of boundary layer and enhance heat transfer. The initial water level in combination with volumetric flow rate of flue gas largely affected overflow in water bath so the water bath heat transfer coefficient increased dramatically upon the occurrence of overflow. The ratio of fuel and air flow rates mainly affected inlet temperature of flue gas and the turbulent kinetic energy of water bath. In the case of smaller turbulent kinetic energy, the water bath heat transfer coefficient deceased although the inlet temperature of flue gas increased. This study can provide some scientific guidance to the design of SCV.关键词
沉浸式汽化器/壳程/烟气/水浴/传热/数值模拟Key words
submerged combustion vaporizer/shell side/flue gas/water bath/heat transfer/numerical simulation分类
能源科技引用本文复制引用
韩昌亮,任婧杰,董文平,张康,毕明树..沉浸式汽化器壳程流体传热实验与数值模拟[J].化工学报,2016,67(10):4095-4103,9.基金项目
中央高校基本科研业务费专项资金资助项目（DUT16QY29）。@@@@Foundation item：supported by the Fundamental Research Funds for the Central Universities (DUT16QY29) （DUT16QY29）
