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Improving air leakage prediction of buildings using the fan pressurization method with the Weighted Line of Organic Correlation

机译：利用粉丝加压方法改善建筑物的空气泄漏预测

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In many countries, the fan pressurization method is the most frequently chosen approach for measuring the air leakage of houses. The measurements are usually performed at pressures that far exceed pressures to which buildings are exposed to under normal conditions. A fit of these tests to the power-law formulation allows an extrapolation to data points outside the measured pressure range. With the Ordinary Least Square (OLS) fitting method, the pressure exponent and flow coefficient can be determined. However, the measurement results are highly sensitive to uncertainties induced by external factors like changing wind conditions during the tests, which is neglected by OLS. This may lead to errors in the prediction of flows at lower pressures. The Weighted Line of Organic Correlation (WLOC) is an alternative approach and takes measurement uncertainty into account.In this paper, a statistical analysis of an extensive data set of pressurization measurements has been performed. Both regression techniques have been compared for almost 7500 fan pressurization measurements of six houses in 109 different house leak configurations. The variability in predicting pressure exponent and flow coefficient for both WLOC and OLS regression was analyzed using probability density functions. It was found that the Weighted Line of Organic Correlation significantly decreases the uncertainty in predicting pressure exponent, flow coefficient, and other low-pressure air leakage metrics compared to the Ordinary Least Square fitting. The authors highly recommend the implementation of WLOC in current measurement standards and test equipment.
机译：在许多国家，风扇加压方法是最常用的测量房屋漏气的方法。通常在远远超过正常条件下暴露在该压力的压力下进行测量。对电力法制剂的这些测试拟合允许外推到测量的压力范围之外的数据点。利用普通的最小二乘（OLS）拟合方法，可以确定压力指数和流量系数。然而，测量结果对外部因素诱导的不确定性非常敏感，如在测试期间的风能变化，这是由OLS忽略的。这可能导致在较低压力下的流动预测中的错误。有机相关（WLOC）的加权线是一种替代方法，并考虑测量不确定性。本文已经进行了对广泛数据集的统计分析。在109个不同的房屋泄漏配置中，已经将两种房屋的回归技术进行了比较了近7500扇形加压测量。使用概率密度函数分析了预测WLOC和OLS回归的压力指数和流量系数的可变性。结果发现，与普通最小二乘配合相比，加权有机相关线显着降低了预测压力指数，流量系数，流量系数和其他低压空气泄漏度量的不确定性。作者强烈建议在当前测量标准和测试设备中实施WLOC。

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