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An energy consumption prediction approach of die casting machines driven by product parameters

《机械工程前沿(英文)》   页码 868-886 doi: 10.1007/s11465-021-0656-0

摘要: Die casting machines, which are the core equipment of the machinery manufacturing industry, consume great amounts of energy. The energy consumption prediction of die casting machines can support energy consumption quota, process parameter energy-saving optimization, energy-saving design, and energy efficiency evaluation; thus, it is of great significance for Industry 4.0 and green manufacturing. Nevertheless, due to the uncertainty and complexity of the energy consumption in die casting machines, there is still a lack of an approach for energy consumption prediction that can provide support for process parameter optimization and product design taking energy efficiency into consideration. To fill this gap, this paper proposes an energy consumption prediction approach for die casting machines driven by product parameters. Firstly, the system boundary of energy consumption prediction is defined, and subsequently, based on the energy consumption characteristics analysis, a theoretical energy consumption model is established. Consequently, a systematic energy consumption prediction approach for die casting machines, involving product, die, equipment, and process parameters, is proposed. Finally, the feasibility and reliability of the proposed energy consumption prediction approach are verified with the help of three die casting machines and six types of products. The results show that the prediction accuracy of production time and energy consumption reached 91.64% and 85.55%, respectively. Overall, the proposed approach can be used for the energy consumption prediction of different die casting machines with different products.

关键词: die casting machine     energy consumption prediction     product parameters    

Energy consumption of 270 schools in Tianjin, China

Jincheng XING,Junjie CHEN,Jihong LING

《能源前沿(英文)》 2015年 第9卷 第2期   页码 217-230 doi: 10.1007/s11708-015-0352-z

摘要: With the rapid development of education cause, the increasing energy consumption of school buildings is gradually causing widespread concern in recent years in China. This paper presented an analysis of energy consumption of 270 schools located in the city of Tianjin, China. The analysis focused specifically on calculating the space heating energy consumption indexes and non-heating energy consumption indexes of different types of schools, aiming at providing reliable and precise data for the government to elaborate policies and measures. The space heating energy consumption of schools adopting district heating and gas boiler were 92.04 kWh/(m ·a) and 64.25 kWh/(m ·a), respectively. Comparing to the schools without a canteen, the non-heating energy consumption index of schools with a canteen can increase by 8%–37%. Furthermore, clustering of different energy sources, the total primary energy consumption indexes were also presented. Space heating energy consumption accounted for approximately 64%–79% of the total primary energy consumption. When using time-sharing control and self-contained gas boiler instead of district heating, an amount of almost 27.8 kWh/(m ·a) and 77.5 kWh/(m ·a) can be saved respectively. Through extensive statistical analysis of the data collected, this paper demonstrated that gross floor area, heating energy source and canteen had a close relationship with the total primary energy consumption regarding complete schools. Eventually, a linear regression equation was established to make a simple prediction about the total energy consumption of existing complete schools and to estimate the energy consumption of complete schools to be built.

关键词: schools     energy consumption index     primary energy     energy saving     regression analysis    

Survey and analysis of energy consumption in office buildings in Tianjin

Junlong LI, Huan ZHANG, Shijun YOU, Zhenhui XIE

《能源前沿(英文)》 2013年 第7卷 第1期   页码 69-74 doi: 10.1007/s11708-012-0221-y

摘要: An energy audit of 24 office buildings was conducted in Tianjin, including basic information of buildings, building energy system and energy bills. The investigation results showed that the average intensity of energy consumption in office buildings in Tianjin accounts for 161.51 kW·h/(m ·a). By breaking the energy consumption down into detailed items, it was found that the heating system consumed the highest amount of energy (46.6%), followed by equipment (35.9%), cooling system (11%) and lighting system (6.69%). The main factors for office building energy consumption were found and some feasible measures to save energy were proposed.

关键词: office building     energy consumption intensity     energy consumption breakdown     energy saving measures    

Energy consumption and carbon emissions of hospitals in Tianjin

Chongxu JIANG, Jincheng XING, Jihong LING, Xiaona QIN

《能源前沿(英文)》 2012年 第6卷 第4期   页码 427-435 doi: 10.1007/s11708-012-0199-5

摘要: An energy audit of 22 tertiary hospitals was conducted in Tianjin. The detailed content included design data, basic information, energy bills and equipment lists. It was shown that during the study, the energy intensity of hospitals in Tianjin was approximately stable and the average level of energy consumption was 348 kW·h/(m ·a). From the date collected, it was calculated that the energy intensity of general hospitals was 380 kW·h/(m ·a), and the average carbon emissions was 157 kgCO /(m ·a); While the energy intensity of specialized hospitals was 309 kW·h/(m ·a), and the average carbon emissions was 131 kgCO /(m ·a). By breaking the energy consumption down into several items, it was found that the heating system consumed the highest amount of energy (42.12%), followed by the cooling system (6.78%), the medical equipment (4.98%) and the lighting system (3.63%). The main factors that affect the hospital energy consumption were determined, and some feasible technology and management measures to save energy and reduce carbon emissions were proposed.

关键词: hospital building     energy consumption     carbon emissions     energy saving     emission reduction    

Impact of climate change on building heating energy consumption in Tianjin

Cao XIANG, Zhe TIAN

《能源前沿(英文)》 2013年 第7卷 第4期   页码 518-524 doi: 10.1007/s11708-013-0261-y

摘要: This paper investigated the variation of building heating energy consumption caused by global warming in Tianjin, China. Based on the hourly historical and monthly projected future (B1/A1B emissions scenarios) meteorological data, the variation of those relevant meteorological parameters was first analyzed. A TRNSYS simulation model for a reference building was introduced to investigate historical variation of office building energy consumption. The results showed that the 10-year-average heating energy consumption of 2001–2010 had reduced by 16.1% compared to that of 1961–1970. By conducting principal component analysis and regression analysis, future variation of building heating load was studied. For B1/A1B emissions scenarios, the multi-year-average heating load was found to decrease by 9.7% (18.1%)/10.2% (22.7%) compared to that of 1971–2010 by 2011–2050 (2051–2100).

关键词: global warming     office building     heating energy consumption    

Comparison and analysis of energy consumption of energy-efficient office buildings in different climate

Ke ZHANG, Neng ZHU

《能源前沿(英文)》 2013年 第7卷 第3期   页码 399-405 doi: 10.1007/s11708-013-0260-z

摘要: The purpose of this paper is to analyze the energy consumption (EC) and find out the determining factors of energy-efficient office building cases according to specific case studies in typical cities of different climate zones in China. The investigated building cases were located in four cities (Beijing, Ningbo, Nanjing and Shenzhen) of three architecture thermotechnical design zones (cold zone, hot summer and cold winter zone, hot summer and warm winter zone). The analysis indicates that the energy consumption index (ECI) of these four cases ranges from 41.06 to 74.23 kW·h/(m ·a). Besides, the outdoor climate can change the EC of air conditioning/heating systems, and further determine the monthly volatility of the total EC of the whole building.

关键词: energy-efficient building     breakdown energy consumption (EC)     energy consumption index (ECI)     different climate zone    

Strategic Thinking on a Revolution/an Evolution in Production and Consumption of Energy in China

Ke-chang Xie,Ke Liu

《工程管理前沿(英文)》 2014年 第1卷 第1期   页码 30-36 doi: 10.15302/J-FEM-2014006

摘要: This article summarizes the thinking behind the call for a revolution/an evolution in China's energy production and consumption. China is still a developing country, though it has experienced fast economic growth in the past thirty years. It achieved great accomplishments surprising the world, and it is also confronted with challenges on energy supply and environmental protection. As environmental pollution becomes more and more serious, the energy challenges have become more and more complicated. With this in mind, the authors analyzed China's energy situation, China's energy supply and consumption, the world energy map, China's commitment both to improving its domestic environment and fulfilling its international obligations to control climate change. Action plans are presented to support the call for a revolution/an evolution in China's energy production and consumption as an effective assurance for China's ambitious goal of building a moderately prosperous society in all respects.

关键词: revolution     evolution     energy     production     consumption    

消费领域用能特征探究

江亿,朱安东,郭偲悦

《中国工程科学》 2015年 第17卷 第8期   页码 122-131

摘要:

根据使用过程特征,可以将用能行为分成生产领域用能与消费领域用能。前者提供产品,后者提供服务。消费领域与生产领域用能存在不同特征,其评价方法、节能途径、战略政策等也存在差别。考虑到这一领域能耗可能是我国下一阶段能耗增长点,在节能领域需要对其给予足够的重视。本文在分析消费领域用能特征的基础上,提出对其的衡量方式和节能途径,并针对我国目前消费领域用能的现状给出建议。

关键词: 消费领域;生产领域;能耗;特征    

Causality between energy consumption and GDP in the U.S.: evidence from wavelet analysis

Alper ASLAN, Nicholas APERGIS, Selim YILDIRIM

《能源前沿(英文)》 2014年 第8卷 第1期   页码 1-8 doi: 10.1007/s11708-013-0290-6

摘要: This study investigates the dynamic causal relationship between energy consumption and economic growth in the U.S. at different time scales. The main novelty of the study is that this paper complements the existing studies on the nexus between energy consumption and economic growth by employing the wavelet transformation to obtain different time scales in order to investigate causality between energy consumption and economic growth. This method is first developed by Ramsey and Lampart. Their approach consists of first decomposing the series into time scales by wavelet filters and testing causality of each time scale with the pertinent time scale of the other series separately. The data span from 1973q1 to 2012q1 on a quarterly basis. The main empirical insight is that the causal relationship is stronger at finer time scales, whereas the relationship is less and less apparent at longer time horizons. The results indicate that energy consumption causes economic growth, while the reverse is not true at the original frequency of the data. At the very finest scale the same result arises. However, at coarser scales feedback is observed. In particular, at intermediate time scales the evidence indicates that energy consumption causes economic growth, while the reverse is also true. These empirical findings are expected to be of high importance in terms of the effective design and implementation of energy and environmental policies, especially when a number of countries in the pursuit of high economic growth targets do not pay any serious attention on environmental issues.

关键词: energy consumption     economic growth     wavelet analysis     granger causality    

关于我国推行能源消费革命、控制能源消费总量的战略问题的初步探讨

倪维斗,金涌,麻林巍,胡山鹰

《中国工程科学》 2015年 第17卷 第9期   页码 111-117

摘要:

本文对我国推行能源消费革命、控制能源消费总量的三个关键战略问题进行了初步探讨:①我国能源消费的历史和未来发展趋势是什么?有哪些主要特点?②我国“能源消费革命”的基本概念是什么?内涵主要涉及哪些方面?③我国推行能源消费革命的目标和实现途径分别是什么?最后,基于对上述问题形成的一些认识,本文提出了6条关于我国推行能源消费革命、控制能源消费总量的战略建议。

关键词: 能源消费革命;控制能源消费总量;发展战略;系统分析    

Multiple regression models for energy consumption of office buildings in different climates in China

Siyu ZHOU, Neng ZHU

《能源前沿(英文)》 2013年 第7卷 第1期   页码 103-110 doi: 10.1007/s11708-012-0220-z

摘要: The energy consumption of office buildings in China has been growing significantly in recent years. Obviously, there are significant relationships between building envelope and the energy consumption of office buildings. The 8 key building envelope influencing factors were found in this paper to evaluate their effects on the energy consumption of the air-conditioning system. The typical combinations of the key influencing factors were performed in Trnsy simulation. Then on the basis of the simulated results, the multiple regression models were developed respectively for the four climates of China—hot summer and warm winter, hot summer and cold winter, cold, and severely cold. According to the analysis of regression coefficients, the appropriate building envelope design schemes were discussed in different climates. At last, the regression model evaluations consisting of the simulation evaluations and the actual case evaluations were performed to verify the feasibility and accuracy of the regression models. The error rates are within±5% in the simulation evaluations and within±15% in the actual case evaluations. It is believed that the regression models developed in this paper can be used to estimate the energy consumption of office buildings in different climates when various building envelope designs are considered.

关键词: regression model     energy consumption     building envelope     office building     different climates    

Comparative study of energy consumption and CO

Zhihua CAI, Xunmin OU, Xu ZHANG, Xiliang ZHANG, Jiankun HE, Yangang XING

《能源前沿(英文)》 2013年 第7卷 第1期   页码 1-5 doi: 10.1007/s11708-012-0227-5

摘要: From the view of geographic location, climate and population status, this paper makes a comparative study of the economy structure, transport system, energy supply and carbon emissions among a few cities, especially between Beijing and London, two mega-cities in the world. The developed tertiary industry, consummate transport system and low-carbon energy supply system in London can be referenced to assist Beijing in establishing a low-carbon development pathway. The difference in the statistical coverage of population between these two cities also brings about the divergence of energy consumption per capita and CO? emissions per capita between them.

关键词: Beijing     London     CO? emissions     energy consumption     low-carbon development    

The energy consumption in a batch stripper and a batch rectifier

Xianbao CUI, Tianyang FENG, Ying ZHANG, Zhicai YANG,

《化学科学与工程前沿(英文)》 2009年 第3卷 第4期   页码 443-452 doi: 10.1007/s11705-009-0266-6

摘要: The energy consumption in a batch rectifier and a batch stripper was investigated with a shortcut mathematical model. The minimum energy consumption of a batch stripper was compared to that of a batch rectifier under “general constant reflux” and “general constant distillate composition” with the ratio of minimum energy consumption /. When the feed contains a large amount of light component, the product purity specification is low and the relative volatility is small, the minimum energy consumption of a batch stripper is less than that of a batch rectifier under “general constant reflux” and “general constant distillate composition”. When the feed contains a small amount of light component, the product purity specification is very high and the relative volatility is low, a batch stripper can also consume less energy only in the “general constant distillate composition” operation mode. In other cases, a batch rectifier can consume less energy.

关键词: constant reflux     feed     energy consumption     general constant     product purity    

Influence of infiltration on energy consumption of a winery building

Hejiang SUN, Qingxia YANG

《能源前沿(英文)》 2014年 第8卷 第1期   页码 110-118 doi: 10.1007/s11708-013-0293-3

摘要: With the wide use of light steel structure in industrial buildings, some problems such as air leakage, water dripping and condensation and so forth occur during the construction and operation phases. Through the onsite testing of a winery building in Huailai County, Hebei Province in China, the influence of infiltration on energy consumption in industrial buildings was studied. The pressurization test method and moisture condensation method were used to test the infiltration rates. The results show that the winery building is twice as leaky as normal Chinese buildings and five times as leaky as Canadian buildings. The energy use simulation demonstrates that the reduction of the infiltration rate of the exterior rooms to 1/3 and the interior rooms to 1/2 could help decrease a total energy consumption of approximately 20% and reduce a total energy cost of approximately $ 225000. Therefore, it has a great potential to reduce the energy consumption in this type of buildings. Enforcement of the appropriate design, construction and installation would play a significant role in improving the overall performance of the building.

关键词: industrial building     air change rate     pressurization test method     moisture condensation method     energy cost    

Impact of household transitions on domestic energy consumption and its applicability to urban energy

Benachir MEDJDOUB, Moulay Larbi CHALAL

《工程管理前沿(英文)》 2017年 第4卷 第2期   页码 171-183 doi: 10.15302/J-FEM-2017029

摘要: The household sector consumes roughly 30% of Earth’s energy resources and emits approximately 17% of its carbon dioxide. As such, developing appropriate policies to reduce the CO emissions, which are associated with the world’s rapidly growing urban population, is a high priority. This, in turn, will enable the creation of cities that respect the natural environment and the well-being of future generations. However, most of the existing expertise focuses on enhancing the thermal quality of buildings through building physics while few studies address the social and behavioral aspects. In fact, focusing on these aspects should be more prominent, as they cause between 4% and 30% of variation in domestic energy consumption. Premised on that, the aim of this study was to investigate the effect in the context of the UK of household transitions on household energy consumption patterns. To achieve this, we applied statistical procedures (e.g., logistic regression) to official panel survey data comprising more than 5500 households in the UK tracked annually over the course of 18 years. This helped in predicting future transition patterns for different household types for the next 10 to 15 years. Furthermore, it enabled us to study the relationship between the predicted patterns and the household energy usage for both gas and electricity. The findings indicate that the life cycle transitions of a household significantly influence its domestic energy usage. However, this effect is mostly positive in direction and weak in magnitude. Finally, we present our developed urban energy model “EvoEnergy” to demonstrate the importance of incorporating such a concept in energy forecasting for effective sustainable energy decision-making.

关键词: urban energy planning     household transitions     smart cities     energy forecasting     household projection     serious gaming    

标题 作者 时间 类型 操作

An energy consumption prediction approach of die casting machines driven by product parameters

期刊论文

Energy consumption of 270 schools in Tianjin, China

Jincheng XING,Junjie CHEN,Jihong LING

期刊论文

Survey and analysis of energy consumption in office buildings in Tianjin

Junlong LI, Huan ZHANG, Shijun YOU, Zhenhui XIE

期刊论文

Energy consumption and carbon emissions of hospitals in Tianjin

Chongxu JIANG, Jincheng XING, Jihong LING, Xiaona QIN

期刊论文

Impact of climate change on building heating energy consumption in Tianjin

Cao XIANG, Zhe TIAN

期刊论文

Comparison and analysis of energy consumption of energy-efficient office buildings in different climate

Ke ZHANG, Neng ZHU

期刊论文

Strategic Thinking on a Revolution/an Evolution in Production and Consumption of Energy in China

Ke-chang Xie,Ke Liu

期刊论文

消费领域用能特征探究

江亿,朱安东,郭偲悦

期刊论文

Causality between energy consumption and GDP in the U.S.: evidence from wavelet analysis

Alper ASLAN, Nicholas APERGIS, Selim YILDIRIM

期刊论文

关于我国推行能源消费革命、控制能源消费总量的战略问题的初步探讨

倪维斗,金涌,麻林巍,胡山鹰

期刊论文

Multiple regression models for energy consumption of office buildings in different climates in China

Siyu ZHOU, Neng ZHU

期刊论文

Comparative study of energy consumption and CO

Zhihua CAI, Xunmin OU, Xu ZHANG, Xiliang ZHANG, Jiankun HE, Yangang XING

期刊论文

The energy consumption in a batch stripper and a batch rectifier

Xianbao CUI, Tianyang FENG, Ying ZHANG, Zhicai YANG,

期刊论文

Influence of infiltration on energy consumption of a winery building

Hejiang SUN, Qingxia YANG

期刊论文

Impact of household transitions on domestic energy consumption and its applicability to urban energy

Benachir MEDJDOUB, Moulay Larbi CHALAL

期刊论文