This study focuses on the calculation of carbon emissions during prefabricated component transportation phase, figuring out how to accurately infer the carbon emissions factor according to the changing of external factors. Through tracking and analyzing the differences between prefabricated component transportation phase and ordinary building material transportation phase, this paper explores how to establish a calculation mathematical model of carbon emissions factor to reflect the real prefabricated component transportation phase, that work would critically lower the bias of component transportation carbon emissions factors between in real world and giving in relevant national standards. The research content involved in this paper provides quantitative scale for Architecture Engineering and Construction (AEC), and also helps to establish and popularize carbon sink system of Architecture Engineering and Construction (AEC). In this study, prefabricated component, the basic component of assembled building, is taken as the research object and clue. The real carbon emissions performances of transport vehicles loaded with different number of components are simulated, and the carbon emissions factor and related parameter groups of transport vehicles are measured experimentally. Based on the statistical method, the data parameter selection and regression analysis are carried out by using STATA® 12. The relationship between the three parameters of Load Ratio, Average Speed and Atmospheric Temperature on carbon emissions factor are obtained except the types of vehicles. It is found that there is a linear relationship between the carbon emissions factor and the −0.5 power of the Load Ratio, the square of the Atmospheric Temperature and the reciprocal of the Average Speed, and the R2 value of the fitting formula reaches 90.46%. The result has a good interpretation for the measured data, better reflect the real situation of carbon emissions for assembled building during prefabricated component transportation phase, and improve the accuracy of carbon emissions calculation in this phase. If the Load Ratio and Average Speed can be increased, and the transportation time of prefabricated component at lower temperature can be selected, the carbon emissions can be significantly reduced, that could exert positive influence to the environment.

中文翻译：

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装配式建筑预制构件运输阶段碳排放因子评价

本研究侧重于预制构件运输阶段碳排放的计算，研究如何根据外部因素的变化准确推断碳排放因子。本文通过跟踪分析预制构件运输阶段与普通建材运输阶段的差异，探讨如何建立碳排放因子的计算数学模型来反映真实的预制构件运输阶段，该工作将大大降低构件的偏差。交通运输碳排放因子介于现实世界和相关国家标准中。本文所涉及的研究内容为建筑工程与施工（AEC）提供了量化尺度，并帮助建立和推广建筑工程与建设（AEC）碳汇系统。本研究以装配式建筑的基础构件——装配式构件为研究对象和线索。模拟了装载不同数量部件的运输车辆的真实碳排放性能，并通过实验测量了运输车辆的碳排放因子和相关参数组。基于统计方法，利用STATA® 12进行数据参数选择和回归分析，得到了除车型外的负载比、平均车速和大气温度三个参数与碳排放因子的关系。发现碳排放因子与负载比的-0.5次方、大气温度的平方和平均速度的倒数之间存在线性关系，拟合公式的R2值达到90.46%。结果对实测数据具有较好的解释性，较好地反映了装配式建筑在装配式构件运输阶段碳排放的真实情况，提高了该阶段碳排放计算的准确性。如果能够提高载荷比和平均速度，并选择较低温度下预制构件的运输时间，可以显着减少碳排放，从而对环境产生积极影响。大气温度的平方与平均速度的倒数，拟合公式的R2值达到90.46%。结果对实测数据具有较好的解释性，较好地反映了装配式建筑在装配式构件运输阶段碳排放的真实情况，提高了该阶段碳排放计算的准确性。如果能够提高载荷比和平均速度，并选择较低温度下预制构件的运输时间，可以显着减少碳排放，从而对环境产生积极影响。大气温度的平方与平均速度的倒数，拟合公式的R2值达到90.46%。结果对实测数据具有较好的解释性，较好地反映了装配式建筑在装配式构件运输阶段碳排放的真实情况，提高了该阶段碳排放计算的准确性。如果能够提高载荷比和平均速度，并选择较低温度下预制构件的运输时间，可以显着减少碳排放，从而对环境产生积极影响。更好地反映装配式建筑在装配式构件运输阶段碳排放的真实情况，提高该阶段碳排放计算的准确性。如果能够提高载荷比和平均速度，并选择较低温度下预制构件的运输时间，可以显着减少碳排放，从而对环境产生积极影响。更好地反映装配式建筑在装配式构件运输阶段碳排放的真实情况，提高该阶段碳排放计算的准确性。如果可以提高载荷比和平均速度，并选择较低温度下预制构件的运输时间，则可以显着减少碳排放，从而对环境产生积极影响。