普通办公建筑室内热湿环境时频特性分析

Analysis of Indoor Thermal and Moist Environment for Ordinary Office in Time-domain and Frequency-domain

室内热湿环境对人体热舒适性与建筑能耗具有重要影响,本文通过对武汉某一普通办公建筑室内热湿环境全年的测量,采用数理统计与傅里叶变换的方法,分别从时域和频域两个方面对室内热湿环境进行分析。时域统计分析结果表明,对于夏季供冷、冬季供热、过渡季通风的武汉普通办公建筑,室内温度基本维持在15~30℃,相对湿度基本维持在35%~75%,室内热湿环境较为稳定,墙体吸湿性材料湿物性参数变化较小,湿传递过程可进行线性化。频率分析结果表明,在空调季室内水蒸气浓度主要呈短周期(日、小时)变化,在通风季主要呈长周期(双月、半月)变化,在计算等效湿渗透厚度时,应综合考虑各周期分量的影响。

Indoor thermal and moist environment has a significant influence on human comfort and energy consumption of buildings. This study presents a 1-year field measurement of indoor thermal and moist environment of an ordinary office in Wu Han. A detailed analysis of the indoor thermal and moist environment was carried out in time-domain with mathematical statistics and in frequency-domain with Fast Fourier Transform（FFT）,respectively. According to the results,for an ordinary office in Wu Han located in hot summer cold winter region,the indoor temperature keeps being 15 ~ 30 ℃ while the indoor relative humidity almost is between 35% and 75%. The indoor thermal and moist environment varies in a narrow scope. Thus,the moisture transportation process in hygroscopic materials can be linearized accordingly. Based on the analysis in frequency-domain,the indoor water vapor concentration changes within a relative short period,such as one day,and 8 hours cycle in the air-conditioning season while it changes within a relative long period,such as one-month or two-month cycle in the ventilation season. It is advised that main periodic components should be considered when the effective moisture penetration depth is concerned.