微孔送风与血液冷藏库温度场的稳定性研究

Stability of temperature field in blood refrigerated warehouse using micro-hole air inlet

目的探讨不同空气输送技术对血液冷藏库温度变化、波动度、均匀度及温度离散系数的影响,以评价冷藏库温度场的稳定性和均匀性。方法在压缩机运行过程,分析不同送风技术的血液冷藏库温度变化情况。并以库内温度变化、温度离散系数,以及温度波动度、均匀度和各检测点温度偏差等指标评价库内温度场的稳定性;结果采用直吹送风技术库内温度均值为(4.98±0.92)℃,微孔送风技术库内温度均值为(4.15±0.25)℃,两者比较有显著性差异(P<0.0)。对冷藏库整体温度离散系数分析,使用直吹送风技术库内温度离散系数与微孔送风技术库内温度离散系数之间比较,两者有显著性差异(P<0.01);采用直吹送风技术或微孔送送风技术时,库内温度波动度、均匀度和偏差分别为1.85±1.11、1.00±0.68、0.61±0.45和0.49±0.38、0.47±0.37、0.27±0.21,各项指标之间两两比较,其均有显著性差异(P<0.01)。结论与直吹送风技术比较,微孔送风技术使冷藏库温度平均值更接近血液储存温度范围(4±2)℃的中值(4℃),库内温度的离散系数更小,库内各储存单元检测点温度的波动度、均匀度和偏差都更小,有利于保证血液冷藏库温度场的稳定性。为提高血液冷库温度场的稳定性采用微孔送风技术更有保障。该研究填补了国内血液冷藏库的性能评价、验收确认依据的空白,为国内制定血液冷藏库质量标准提供参考。

Objective To study the effect of air inlet modes on the temperature variation, fluctuation, uniformity and coefficient of variation(CV), so as to evaluate the stability and uniformity of the temperature field in refrigerated warehouse for blood. Methods The temperature changes of blood refrigerated warehouse under different modes of air inlet during compressor operation were analyzed. The stability of the temperature field in the storehouse was evaluated by the changes, fluctuation, uniformity, CV and deviation of temperature at each testing point. Results The average value of temperature in the storehouse, adopting air inlet via straight blow, was(4.98±0.92)℃, while that of air inlet via micro-hole mode was(4.15±0.25)℃, with significant differences between each other(P<0.05). As to the CV of temperature, air inlet via straight blow was significantly different from that via micro hole(P<0.01).The fluctuation, uniformity and deviation of temperature created by straight blow and micro hole were 1.85±1.11 vs 0.49±0.38, 1.00±0.68 vs 0.47±0.37, and 0.61±0.45 vs 0.27±0.21, respectively, with significant differences between each other(P<0.01).Conclusion Compared with straight blow, the mean temperature created by micro hole was closer to the median value(4℃) of the temperature range, i.e.(4±2)℃, during blood storage. Otherwise, micro hole demonstrated a smaller CV of temperature, and superior performance in fluctuation, uniformity and deviation of the temperature at the testing points, which was conducive to ensure the stability of storehouse temperature field.