The paper discusses the results of a monitoring campaign performed during the spring and autumn with the purpose to evaluate the operational energy performance of an existing nearly zero energy building (nZEB). It is located in Benevento, a middle-size city of South Italy with typical Mediterranean climate.

A methodology for real-time nZEB performance analysis is proposed by taking into consideration the implications of the continuous interplay between external conditions and indoor occupant requirements as well as between on-site generation and the building loads with the resulting interaction with the energy grid. It takes into account the inertial properties of building envelope and the occupant perception in term of thermo-hygrometric and visual comfort as well as of indoor air quality. Compilation and assessment of appropriate quantitative indicators are proposed basing on data with hourly time step for finding the optimal management of the internal and external shades and the ventilation system. Moreover it is discussed how daily variations can influence the efficiency of the whole building-HVAC system with particular attention to the pre-handling system based on an earth-water heat exchanger.

本文讨论了在春季和秋季进行的一项监测活动的结果，目的是评估现有近零能耗建筑（nZEB）的运行能源性能。它位于意大利南部中等大小的城市贝内文托，具有典型的地中海气候。

提出了一种实时nZEB性能分析的方法，该方法考虑了外部条件与室内居住者需求之间以及现场发电与建筑负载之间持续相互作用以及由此产生的与能源网格之间相互作用的影响。它考虑到了建筑围护结构的惯性特性，以及在温度，湿度和视觉舒适度以及室内空气质量方面的乘员感受。根据每小时时间步长的数据，建议对适当的定量指标进行汇编和评估，以找到对内部和外部阴影和通风系统的最佳管理。