摘要
针对主动式冷梁诱导性能实验中存在的风量测量问题,设计了一套新型主动式冷梁诱导性能测试实验台,基于此实验台研究不同一次风量对主动式冷梁诱导性能的影响。结果表明:一次风量小于80 m3/h时,冷梁诱导比随一次风量的增加而增加,当一次风量达到80 m3/h以后,诱导比基本趋于3.17。冷梁静压箱压力与一次风量之间存在二次方的关系,在冷梁4 mm喷嘴下,静压箱压力随一次风变化的拟合曲线为y=0.0225x2+0.0101x。建立主动式冷梁模型,针对一次风量对诱导性能的影响进行数值模拟,并基于设计的实验台对模拟结果进行验证,得到冷梁诱导比、静压箱压力模拟结果和实验结果误差最高分别达10.5%和8.8%,模拟整体结果和趋势与实际测量吻合良好,说明该模型具有较高的可靠性。
To solve the problem of air flowrate measurement in an active chilled-beam system,a test rig of active chilled-beam was designed,and the influences of different primary air flowrate on the induced performance of an active chilled beam were investigated. The results show that the induction ratio of the chilled beam increases with the increasing primary air volume when the primary air volume is less than 80 m3/h. The induction ratio tended to 3. 17 when the primary air volume later reached 80 m3/h. There is a quadratic relationship between the pressure of the cold plenum and the primary air flow. Under the 4 mm nozzle of the chilled beam,the fitted curve of the static pressure with the primary air is y = 0. 0225 x2+ 0. 0101 x. The active chilled-beam model was then set up,the effect of the primary air volume on the induced performance was simulated numerically,and the simulation results were verified based on the test results. The relative errors between the experimental results and the numerical results reached 10. 5% and 8. 8% for the induction ratio and the pressure of cold plenum,respectively. The overall results and the trend of the simulation are in good agreement with the measured values,which indicates that the simulation has high reliability.
出处
《制冷学报》
CAS
CSCD
北大核心
2017年第6期60-65,79,共7页
Journal of Refrigeration
关键词
主动式冷梁
风量测量
诱导比
静压箱
数值模拟
active chilled beam
air flow measurement
induction ratio
plenum chamber
numerical simulation
