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Evaluation of methods to assess the uncertainty in estimated energy savings

机译:评估评估估计节能中不确定性的方法

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摘要

In this work we present a methodology to evaluate the accuracy of methods used to quantify the uncertainty in estimated total energy savings. We focus on savings measurement and verification (M&V) approaches that use a baseline model to characterize energy use, and that forward-project the model for a counterfactual to determine avoided energy use. These approaches are common to the International Performance Measurement and Verification Protocol's (IPMVP's) Option C and Option B. This methodology can be used to evaluate the uncertainty in savings estimates that are due to model error. It has been applied to evaluate two uncertainty estimation methods, including the industry standard ASHRAE Guideline 14 approach. The evaluation used data from 69 commercial buildings and four different baseline models that span daily and hourly granularity, as well as linear and non-linearon-parametric forms. The findings of this work indicate that the standard methods that are widely used by the M&V community for estimating the total savings uncertainty over the post-installation period tend to underestimate the uncertainty. The tendency to underestimate the uncertainty is stronger for hourly models than for daily models, due to stronger autocorrelation in model residuals at the hourly time scale. (C) 2019 Elsevier B.V. All rights reserved.
机译:在这项工作中,我们提出了一种方法来评估用于量化估计总能量节省的不确定性的方法的准确性。我们专注于节省使用基线模型来表征能源使用的测量和验证(M&v)方法,并且该模型用于确定避免能量使用的模型。这些方法对于国际绩效测量和验证议定书(IPMVP)选项C和选项B是常见的。该方法可用于评估由于模型错误导致的节省估算中的不确定性。它已被应用于评估两个不确定性估算方法,包括行业标准ASHRAE指南14方法。评估使用来自69个商业建筑的数据和每天和每小时粒度的四种不同的基线模型,以及线性和非线性/非参数形式。这项工作的调查结果表明,M&V社区广泛使用的标准方法,用于估计在安装期间的总节约不确定性倾向于低估不确定性。由于在小时时间尺度的模型残留物中更强的自相关,低估了不确定性的趋势比日常模型更强。 (c)2019 Elsevier B.v.保留所有权利。

著录项

  • 来源
    《Energy and Buildings》 |2019年第6期|216-225|共10页
  • 作者单位

    Lawrence Berkeley Natl Lab 1 Cyclotron Rd Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab 1 Cyclotron Rd Berkeley CA 94720 USA;

    KW Engn 287 17th St Suite 300 Oakland CA 94518 USA;

    Quantum Energy Serv & Technol Inc 1330 Broadway Suite 302 Oakland CA 94612 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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