Despite the endorsement of green building regulations and the incorporation of energy-efficient technologies, commercial buildings often fail to achieve the desired energy conservation goals, instead consume as much as 3 times of the predicted energy consumptions, representing a significant building energy performance gap. This study aims to develop a pathway and stakeholder-engaged methodological framework to close the building energy performance gap (EPG) through an in-depth case study of a state-of-the-art green office building. The selected case study is a 14-storey office building with spaces predominantly occupied by public and private companies. The required data were collected from building design documents, energy monitoring reports, building energy simulation models, building management system, stakeholder meeting minutes and records and discussions with the building’s key stakeholders. The collected data were analyzed by using content analysis and statistical analysis methods. The results and findings demonstrated the importance of analysis and comparison of energy consumption at building service systems’ component level rather than comparing the overall energy consumption to determine the level of EPG and unfold the details. Based on the results and findings, it is discovered that even when the overall EPG was close to zero, energy consumptions were significantly higher than the predictions for some components and significantly lower for others. The identified causes of EPG include inefficient control strategies of components, human manual overriding of automatic control operations, inaccurate prediction of after-hour demand and operations, as well as inaccurate modeling of cold and hot weather conditions in winter and summer respectively. An EPG-closing framework, which brings all key energy stakeholders (environmentally sustainable design team, main contractor, facility manager, mechanical service contractor, electrical service contractor, BMS service contractor and independent commissioning agent) together to work collectively to close the EPG was proposed. It is crucial to ensure that there are 1) motivations for involvement and participation of all stakeholders, 2) consistent naming of building service components in the prediction model and BMS system, 3) regular update of prediction models and 4) seamless knowledge transfer between stakeholders to effectively implement the framework. The outcome of this research provides the practitioners with knowledge and confidence to close EPG in their projects. The methods and processes developed and applied in this study provides useful reference to future studies.

尽管批准了绿色建筑法规并采用了节能技术，但商业建筑常常无法达到预期的节能目标，而消耗的能量却高达预期能耗的3倍，这代表了巨大的建筑能源性能差距。这项研究旨在通过对最先进的绿色办公大楼进行深入的案例研究，开发出一种途径和与利益相关者合作的方法框架，以弥合建筑能源绩效差距（EPG）。所选案例研究是一幢14层高的办公楼，主要由公共和私人公司占据。所需数据来自建筑设计文件，能源监测报告，建筑能源模拟模型，建筑管理系统，利益相关者会议记录，并与建筑物的主要利益相关者进行记录和讨论。使用内容分析和统计分析方法对收集的数据进行分析。结果和发现表明，在建筑服务系统组件级别上分析和比较能耗非常重要，而不是通过比较总体能耗来确定EPG级别和展开细节。根据结果​​和发现，即使总EPG接近零，某些组件的能耗也显着高于预期，而其他组件的能耗则显着降低。识别出的EPG原因包括：零件控制策略效率低下，手动控制自动控制操作，下班后需求和运营的预测不准确，以及冬季和夏季分别针对寒冷和炎热的天气条件进行的建模不准确。提出了一个EPG封闭框架，该框架将所有关键能源利益相关者（环境可持续设计团队，主承包商，设施经理，机械服务承包商，电气服务承包商，BMS服务承包商和独立调试代理商）集中起来共同关闭EPG。 。重要的是要确保有1）所有利益相关者参与的动机，2）预测模型和BMS系统中建筑物服务组件的一致命名，3）定期更新预测模型和4）利益相关者之间的无缝知识转移有效实施框架。这项研究的结果为从业人员提供了知识和信心，可以在他们的项目中完成EPG。在这项研究中开发和应用的方法和过程为将来的研究提供了有用的参考。