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A longitudinal analysis of energy consumption data from a high-performance building in the tropics
Energy and Buildings ( IF 6.7 ) Pub Date : 2020-06-24 , DOI: 10.1016/j.enbuild.2020.110230
Balaji Kalluri , Bharath Seshadri , Markus Gwerder , Arno Schlueter

With the use of computer-aided tools, design of high-performance buildings is becoming the de facto industry practice. While reliability and ingenuity of computer simulation models is debated on one hand, continuous measurement and verification of building performance over a long-term is embraced as an alternative solution. The goal of this study is to assess the energy performance of a state-of-the-art high-performance building design in the tropics. Longitudinal and high-fidelity energy consumption data from the high-performance office building (3for2) is presented and analysed for this purpose. The approach to energy-performance assessment presented in this study has two parts. The first part is performance verification which entails using two-years of detailed energy-use data to validate building’s estimated annual energy-use, determined using short-term (i.e. first 100 days of building energy-use) data. Thus, recalibrating the building’s baseline energy performance. The second part is performance benchmarking which entails comparing target building’s energy performance against their peers. Thus, verifying the original classification of 3for2 building design as high-performance, by comparing normalized annual building energy-use against national benchmark statistics.

The results and analysis based on long-term measurements help assess several key building performance measures of the 3for2 office design. Firstly, it verified the baseline energy-use is 81.1 kWh/sqm/yr as compared to 77 kWh/sqm/yr estimated based on short-term data. Secondly, several positive energy-saving interventions collectively lowered energy-use to 67.7 kWh/sqm/yr, and thus improve energy-performance by approximately 16% over the baseline. The relevant interventions implemented in 3for2 design are CO2-based demand control ventilation, occupant-centric controls and low-lift vapour-compression chiller. Finally, it demonstrated approximately 40% improved energy performance over other similar buildings in the tropics. Thus, the lessons learnt from longitudinal study help conclude that 3for2 is one of the most energy-efficient office building in the tropics. In addition, this study also exemplifies the role of middleware in making building designs not only high-performing, but also verifiable continuously in long-term throughout building’s life cycle. Overall, this concludes that truly realising high-performance buildings in future lies in not only integrating low-energy architecture and building systems, but also closing the feedback loop by integrating appropriate energy-saving interventions through high-fidelity data infrastructure.



中文翻译:

对热带地区一幢高性能建筑能耗数据的纵向分析

随着计算机辅助工具的使用,高性能建筑物的设计已成为事实上的行业惯例。一方面,人们对计算机仿真模型的可靠性和独创性进行了辩论,另一方面,长期的连续测量和建筑性能验证也被视为一种替代解决方案。这项研究的目的是评估热带地区最先进的高性能建筑设计的能源性能。为此目的,提供并分析了来自高性能办公大楼(3for2)的纵向和高逼真的能耗数据。本研究中提出的能源绩效评估方法分为两个部分。第一部分是性能验证这需要使用两年的详细能源使用数据来验证建筑物的估计年度能源使用,该数据是使用短期(即建筑物能源使用的前100天)数据确定的。因此,重新校准建筑物的基准能源性能。第二部分是性能基准测试,它需要将目标建筑的能源性能与同等建筑进行比较。因此,通过将标准化的年度建筑能耗与国家基准统计数据进行比较,可以验证3for2建筑设计的原始分类为高性能。

基于长期测量的结果和分析有助于评估3for2办公设计的多项关键建筑性能测量。首先,它验证了基线能耗为81.1 kWh / sqm / yr,而根据短期数据估计的基准能耗为77 kWh / sqm / yr。其次,一些积极的节能措施将能耗降低到67.7 kWh / sqm / yr,从而使能源绩效比基准提高了约16%。3for2设计中实施的相关干预措施是基于CO 2的需求控制通风,以乘员为中心的控制和低升程蒸气压缩式冷水机组。最后,与热带地区的其他类似建筑物相比,它显示出约40%的能源性能改善。因此,从纵向研究中吸取的教训有助于得出结论:3for2是热带地区最节能的办公大楼之一。此外,本研究还例证了中间件在使建筑物设计不仅性能高,而且在建筑物的整个生命周期中可以长期连续验证的作用。总的来说,这得出结论,未来真正实现高性能建筑不仅在于集成低能耗建筑和建筑系统,还在于通过通过高保真数据基础架构集成适当的节能措施来封闭反馈回路。

更新日期:2020-07-09
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