矿用CO_2开放式制冷仿真系统设计与优化

Design and Optimization on Simulation System of Mine CO_2 Open Loop Cycle Refrigeration

针对CO2开放式制冷在避难硐室、救生舱等有限密闭空间中应用的重要性,利用FLOWMAS-TER热流体计算仿真软件,设计了一种用于有限密闭空间的CO2开放式制冷仿真系统,在满足设计制冷量和气动风机进出口压降、温降的条件下,对蒸发器管长进行优化,获得了最佳蒸发器长度,同时对非设计工况下的制冷系统特性及不同制冷量进行校核,并对该制冷仿真系统进行了试验验证,仿真值与试验值吻合良好,验证了系统仿真的准确性和精确性。

According to the importance of the CO2 open loop cycle refrigeration applied to the rescue cabin,the refuge chamber and other limited airtight space, the FLOWMASTER simulation software of the thermal fluid system was applied to design the simulation system of the CO2 open loop cycle refrigeration applied to a limited airtight space.Under the conditions to meet the designed refrigeration value and the pressure drop and temperature drop at the inlet and outlet of the pneumatic blower, the tube length of the evaporator was optimized and the optimum length of the evaporator was obtained. Meanwhile the refrigeration system features and the different refrigeration value under the non designed performances were checked.The test certification was conducted on the refrigeration simulation system.The simulated value and the test value were well fitted and the simulation accuracy and precision of the system were verified.