直接接触式/间接接触式加肋蓄热器性能比较研究

EXPERIMENTAL STUDY ON THE PERFORMANCE OF THERMAL ENERGY STORAGE CONTAINER USING DIRECT CONTACT STRUCTURE/INDIRECT CONTACT STRUCTURE WITH FINS

将直接接触式加肋蓄热器应用于移动蓄热系统,结合蓄热材料赤藻糖醇的特点设计便于运输的水平圆柱状直接接触式蓄热器。通过观察材料熔化凝固趋势、测量测点温度的方法研究蓄热器的充放热性能,并与间接接触式加肋蓄热器进行比较,结果表明:直接接触式蓄热器充热过程材料由上部向下部熔化,放热过程材料由上部和下部向中间凝固;增加导热油流量可以缩短蓄热器充放热时间;蓄热材料的熔化凝固趋势与进油管的位置有关。直接接触式蓄热器与间接接触式加肋蓄热器相比,具有更高的充放热速率、热利用率以及更低的运输成本,在移动蓄热系统中应优先考虑。

The direct contact structure was used in mobilized thermal energy storage system, and a horizontal cylindrical direct contact thermal energy storage container with consideration of the properties of erythritol was built. By observing the melting process and solidification trend of material, the heat charging and discharging performance were researched through temperature measurement, and performance is compared with that of the indirect contact thermal energy storage container with fins. The result showed that the material melt from top to the bottom, while melt from top and bottom to the middle in solidification process. Increasing the flow rate of heat conducting oil, the heat charge and discharge time could be decreased. In addition, the melting and solidifying trend of material were directly related to the position of oil inlet pipe. Compared with the indirect contact thermal energy storage container with fins, the direct contact thermal energy storage container used in this paper has higher charging and discharging rate, higher heat utilization efficiency and lower transportation cost. It should be considered first in mobilized thermal energy storage system.