风机盘管实际运行状态下换热性能特征研究

盘管换热性能受多方面因素影响,在实际运行过程中其换热性能与额定工况性能往往存在偏差。本文以上海地区某一居住建筑为例,建立基于热交换效率的风机盘管换热模型,引入统计学方法从宏观角度分析盘管在换热过程中的分布性规律。实测数据表明,盘管在实际运行中相比额定工况全热量,显热量和潜热量分别下降39.5%,37.9%和44.3%。通过正态性检验发现,该盘管全热量可以看作是均值为1.256、方差为0.208的正态分布,而显热量与潜热量的分布并不具有正态性特征。最后,对提高风量后的盘管换热性能进行模拟,可以发现提升至高档(风量提升28.6%)后,对于相同的室内环境条件下,盘管显热量和全热量可分别提升26.5%,20.9%。

Characterization Study on Heat Transfer Performance of Fan Coil in Actual Operation

Since the fan coil heat transfer performance is affected by various factors,deviation always exists between rated working condition performance and actual.Taking a residential building in Shanghai as an example,a fan coil heat transfer model has been established.With the introduced statistical methods,the distribution law of coils in heat transfer process from a macroscopic perspective.Results show that the total heat,sensible heat and latent heat of the coil in the actual operation are reduced by 39.5%,37.9% and 44.3%,respectively.Besides,it is found by normality test that the total heat of the coil can be regarded as a normal distribution with a mean of 1.256 and a variance of 0.208,while the distribution of sensible heat and latent heat does not have same characteristics.Finally,after simulating the heat transfer performance of the coil after increasing the air volume,it can be found out that with the air volume increased by 28.6%,the sensible heat and total heat of the coil can be increased by 26.5%,20.9%.