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基于聚类分析的酒店建筑分类与用能评价 总被引:1,自引:0,他引:1
根据建筑能耗影响因素的特性来进行类别划分是客观、科学地评价建筑用能水平的前提。以酒店建筑为例,从多个建筑能耗影响因素中选取23个参数引入评价指标体系中,应用主成分分析方法对指标体系进行降维处理,并采用聚类分析法将酒店建筑样本群划分为三类,最后对各类建筑的用能水平进行综合分析和评价。按照新的分类方法,每一类酒店都代表了各自的特点,与传统按星级分类相比,该方法反映酒店总体特性的参数更趋近一致,按照此分类进行的能耗基准评价将更具代表性,能够更好地引导酒店建筑节能诊断和用能管理,也为其他类型建筑的类型细化和用能评价提供方法指导。 相似文献
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对西安市多家大型酒店进行了调研,获得酒店建筑实际运行中的建筑能耗值,并通过对比多家酒店能耗信息,分析了西安市大型酒店建筑的能源构成、能耗状况及用能特点,提出了酒店建筑能源管理和设备运行中的问题,以及相应的节能措施。 相似文献
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《Planning》2016,(7)
本文以预测昆明市2020年的能源消费总量为精确化问题,以昆明市能源状况为中心,从能源生产和能源消费两个视角为切入点,指出能源产品对外依存度较高;工业部门仍是我市能源消费的主要部门,高速的经济增长是以相应的能源消费增速支撑实现的。通过拟合以经济总量、产业结构和人口总量为自变量,能源消费总量为因变量的回归方程;采用情景分析法,设定基准、中等和高等三种情景,预测昆明市2020年的能源消费总量。在能满足昆明市发展低碳经济的前提下,得出结论,建议昆明市"十三五"期间,GDP能耗目标降低率为8%~12%。 相似文献
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This paper reports the development of a building energy demand predictive model based on the decision tree method. This method is able to classify and predict categorical variables: its competitive advantage over other widely used modeling techniques, such as regression method and ANN method, lies in the ability to generate accurate predictive models with interpretable flowchart-like tree structures that enable users to quickly extract useful information. To demonstrate its applicability, the method is applied to estimate residential building energy performance indexes by modeling building energy use intensity (EUI) levels. The results demonstrate that the use of decision tree method can classify and predict building energy demand levels accurately (93% for training data and 92% for test data), identify and rank significant factors of building EUI automatically. The method can provide the combination of significant factors as well as the threshold values that will lead to high building energy performance. Moreover, the average EUI value of data records in each classified data subsets can be used for reference when performing prediction. One crucial benefit is improving building energy performance and reducing energy consumption. Another advantage of this methodology is that it can be utilized by users without requiring much computation knowledge. 相似文献
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This paper presents a study on energy performance of Singapore's hotel buildings. Energy consumption data and other pertinent information were collected from 29 quality hotels through a national survey. Building features and operational characteristics contributing to the variations in hotel energy performance were discussed. The annual average total energy use intensity (EUI) in these hotels is 427 kWh/m2. Electricity and gas are used in all sampled hotels, and some hotels also use diesel to power standby generator or hot water boiler. We also investigated relationships between electricity consumption and number of occupied rooms in individual hotels; the weak correlations found indicate it is necessary to improve energy management when occupancy rate is low. Besides, Pearson correlations between hotel energy use intensity and possible explanatory indicators revealed that three-star hotels differ from high class establishments in energy use. Worker density and years after the last major energy retrofit were also found to be highly correlated to hotel building energy use intensity. Also discussed in this paper is the effect of weather conditions on electricity consumption of the hotels. 相似文献
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Holly W. Samuelson Arash Ghorayshi Christoph F. Reinhart 《Journal of Building Performance Simulation》2016,9(1):17-29
This paper evaluates the accuracy of 18 design-phase building energy models, built according to LEED Canada protocol, and investigates the effectiveness of model calibration steps to improve simulation predictions with respect to measured energy data. These calibration steps, applied in professional practice, included inputting actual weather data, adding unregulated loads, revising plug loads (often with submetered data), and other simple updates. In sum, the design-phase energy models underpredicted the total measured energy consumption by 36%. Following the calibration steps, this error was reduced to a net 7% underprediction. For the monthly energy use intensity (EUI), the coefficient of variation of the root mean square error improved from 45% to 24%. Revising plug loads made the largest impact in these cases. This step increased the EUI by 15% median (32% mean) in the models. This impact far exceeded that of calibrating the weather data, even in a sensitivity test using extreme weather years. 相似文献
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This paper reports on a study of resource consumption in 184 Hilton International and Scandic hotels in Europe. An overview of the characteristics of these two brands (upscale and mid-market, respectively), as well as the collective resource consumption in these hotels is presented (2004 data). This is followed by a more detailed analysis of a number of physical and operational factors that may potentially influence the energy and water use in these hotels. A multiple variable regression analysis indicated that, in the absence of climate data, hotel standard, total hotel floor area, number of guest-nights sold and number of food covers sold all affect the energy and water use in these facilities. The survey results further document significant differences in the energy- and water-utilisation in Hilton and Scandic hotels. This indicates that establishing realistic resource consumption benchmarks or models requires classifying hotels (especially those belonging to the upscale brand) into sufficiently specialised sub-groups representing facilities with comparable properties. It is further suggested that benchmarking of facility components may be necessary. The paper concludes with some recommendations on the procedure and criteria for establishing a useful reporting system and benchmarking model. 相似文献
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A benchmark study of the energy efficiency of private office buildings in Hong Kong was conducted in 2002 because energy efficiency was declining. In the study, private office buildings were divided into five user groups. For each group, a multiple regression model was developed to find the relationship between Energy Use Intensities (EUIs) and other factors, such as operating hours, for normalization and benchmarking purposes. In this paper we make use of the regression results to study the energy efficiency of private office buildings by different grades. In Hong Kong, office buildings are divided into three grades (A, B, and C) based on the quality of the facility, which is reflected in rental values; a Grade A office building denotes expensive luxury. We found that the EUI of Grade A office buildings is the highest, consuming over 50% of the total energy used in office buildings. Recently, the annual EUI of office buildings has improved even though Grade A floor space is increasing. This may be due to the promotion of the energy efficiency program launched in the last decade. 相似文献
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Energy use intensity (EUI) and climate have a well documented correlation, which is generally applied in building energy management. Green buildings have sought to greatly reduce energy consumption and a number of examples are documented in the literature. A sample of high performance buildings constructed in a variety of global locations is analyzed here, and provides evidence that measures to reduce energy consumption have reduced EUI to the point where its correlation with heating degree days is no longer apparent. This result suggests that end-user behaviour is the next major hurdle in lowering the energy consumption of greener buildings. 相似文献
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Ashwin Sabapathy Santhosh K.V. Ragavan Mahima Vijendra Anjana G. Nataraja 《Energy and Buildings》2010,42(11):2206-2212
This paper provides a summary of an energy benchmarking study that uses performance data of a sample of Information Technology facilities in Bangalore. Information provided by the sample of occupiers was used to develop an Energy Performance Index (EPI) and an Annual Average hourly Energy Performance Index (AAhEPI), which takes into account the variations in operation hours and days for these facilities. The EPI and AAhEPI were modelled to identify the factors that influence energy efficiency. Employment density, size of facility, operating hours per week, type of chiller and age of facility were found to be significant factors in regression models with EPI and AAhEPI as dependent variables. Employment density, size of facility and operating hours per week were standardised and used in a separate regression analysis. Parameter estimates from this regression were used to normalize the EPI and AAhEPI for variance in the independent variables. Three benchmark ranges - the bottom third, middle third and top third - were developed for the two normalised indices. The normalised EPI and AAhEPI of LEED rated building, which were also part of the sample, indicate that, on average, LEED rated buildings outperform the other buildings. 相似文献
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酒店软件产品服务清洁生产效绩评估体系研究 总被引:1,自引:0,他引:1
本文依据循环经济发展模式的绿色酒店评估体系框架原理,建立起绿色酒店数学表达式,其中将酒店环境质量作为硬件产品服务质量的获得,将酒店清洁生产效绩作为软件产品服务质量的获得,将能源消耗和对环境的影响破坏作为酒店的付出,将酒店的获得与付出的比值作为收益来反映酒店的绿色化程度。而后利用层次分析法建立起酒店软件产品服务清洁生产效绩评估指标体系、指标赋权,通过对酒店经济—能源—环境系统投入产出的分析和能耗寿命周期的分析,确定评估指标标准,并对国内有代表性的8家酒店软件产品服务清洁生产效绩进行试评估,评估方法可行。评估结果显示酒店之间效绩差距很大、整体落后,急需改进。 相似文献