scholarly journals Study on the Carbon Emissions in the Whole Construction Process of Prefabricated Floor Slab

2020 ◽  
Vol 10 (7) ◽  
pp. 2326
Author(s):  
Aisan Kong ◽  
Haibo Kang ◽  
Siyuan He ◽  
Na Li ◽  
Wei Wang
Keyword(s):  
Carbon Emissions ◽  
High Energy ◽  
Construction Process ◽  
Floor Slab ◽  
Construction Methods ◽  
Calculation Results ◽  
Three Stages ◽  
Traditional Construction ◽  
High Energy Consumption

The construction industry is characterized by high energy consumption and high carbon emissions. With growing concern about climate change, environmental protection is becoming increasingly important. In this paper, the whole construction process of prefabricated floor slab (PFS) is divided into three stages: production, transportation, and construction stages. Carbon emissions are calculated based on the life cycle assessment (LCA) method. A case study of PFS construction in Shaoxing city, China, was examined, and the calculation results were compared and evaluated with the traditional construction methods, which showed that in the production stage, carbon emissions increased due to mechanical operations during the prefabrication process. In the transportation stage, carbon emissions also increased due to the heavier prefabricated components during the transportation process. During the on-site construction stage, carbon emissions considerably decreased due to the lower hoisting frequency and less on-site pouring.

Parameters affecting nitrifying biofilm reactors

1994 ◽  
Vol 29 (10-11) ◽  
pp. 1-11 ◽  
Author(s):  
M. Boller ◽  
W. Gujer ◽  
M. Tschui
Keyword(s):  
High Energy ◽  
Experimental Investigations ◽  
Operational Parameters ◽  
Oxygen Utilization ◽  
Trickling Filters ◽  
Biofilm Reactors ◽  
Biomass Activity ◽  
Rotating Biological Contactors ◽  
High Energy Consumption

The variables affecting nitrification in biofilms are identified on a theoretical basis. The influence of various design and operational parameters which affect the resulting substance fluxes into and out of the biofilm and the biomass activity regarding nitrification are illustrated with the help of experimental investigations with plastic media trickling filters, rotating biological contactors and different aerated biofilters. The results of experiments with these systems in tertiary nitrification applications reveal process limitations and technical measures to enhance nitrification performance in each system. In a case study, a comparison between the different biofilm processes and activated sludge alternatives showed that biofilm systems may lead to remarkably smaller reactor volumes, but high energy consumption due to unfavorable oxygen utilization.

The Study on Impact Degree between Carbon Emissions and Economic Growth in the Construction Industry of Five Northwestern Provinces

2013 ◽  
Vol 838-841 ◽  
pp. 2818-2822
Author(s):  
Su Xian Zhang ◽  
Xian Wei Tang
Keyword(s):  
Economic Growth ◽  
Energy Consumption ◽  
Construction Industry ◽  
Development Strategy ◽  
Carbon Emissions ◽  
High Energy ◽  
Low Carbon ◽  
Western Development ◽  
High Energy Consumption ◽  
Great Stress

With the highly praised development of low-carbon and implementation of western development strategy, the various industries of northwest faced great stress with how to weigh the economic growth and reduce carbon emissions. In this study, based on the data about energy consumption and GDP in the construction industry of five northwestern provinces, and estimates the carbon emissions of construction indirectly. Then combined withDecoupling Theoryanalysis the interacted impact among carbon emissions, energy consumption and economic growth in the construction industry of five northwestern provinces .The results shows that the development of construction industry in provinces is still based on high energy consumption and high carbon emissions, but each impact degree of them are different. Finally, put some suggest improvements to reduce the energy consumption and carbon emissions in the construction industry path of five northwestern provinces.

scholarly journals Cradle-to-Site Carbon Emissions Assessment of Prefabricated Rebar Cages for High-Rise Buildings in China

2018 ◽  
Vol 11 (1) ◽  
pp. 42 ◽  
Author(s):  
Boya Jiang ◽  
Hongxian Li ◽  
Ling Dong ◽  
Yu Wang ◽  
Yiqi Tao
Keyword(s):  
Co2 Emissions ◽  
Carbon Emissions ◽  
Sustainable Construction ◽  
The Sustainable Development ◽  
Reinforcing Bar ◽  
High Rise ◽  
Construction Methods ◽  
Three Stages ◽  
Material Preparation

Construction industrialization is growing rapidly and has received significant attention worldwide in recent years. The industrialization of construction results in several benefits, including the promotion of sustainable construction and the development and application of prefabrication techniques. The Prefabricated Rebar Cage (PRC) is an emerging solution applied to high-rise buildings as a replacement of the In-situ Reinforcing Bar (ISRB) construction method. This paper investigates the cradle-to-site carbon emissions of PRC, and compares the results with those of conventional in-situ rebar construction methods for high-rise buildings. The cradle-to-site cycle is divided into three stages, namely, material preparation, transportation, and on-site construction. For the material preparation stage, it is found that CO2 emissions are increased by 3% when using PRC due to the operation of machinery during the prefabrication process. In the transportation stage, CO2 emissions are found to increase by 3.3 times for PRC, as there is more transportation required for PRCs than for conventional construction methods. During the on-site construction stage, the PRC method demonstrates its advantages by reducing CO2 emissions by 44.7%, which is attributed to decreased hoisting frequency and lower mechanical utilization for fewer joining activities. Overall, CO2 emissions can be reduced by 1.24% by adopting the PRC method for high-rise buildings, and it is therefore recommended to adopt PRCs for this purpose. This research studies carbon emissions of PRC and contributes to promoting the sustainable development of prefabricated building techniques.

scholarly journals Energy Scheduling Using Decision Trees and Emulation: Agriculture Irrigation with Run-of-the-River Hydroelectricity and a PV Case Study

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3987 ◽  
Author(s):  
Omid Abrishambaf ◽  
Pedro Faria ◽  
Zita Vale ◽  
Juan M. Corchado
Keyword(s):  
Decision Tree ◽  
High Energy ◽  
Efficient Solutions ◽  
World Population ◽  
Technical Validation ◽  
Agriculture Irrigation ◽  
Technical Features ◽  
High Energy Consumption ◽  
Tree Approach

Agriculture is the very backbone of every country. Unfortunately, agricultural sustainability is threatened by the lack of energy-efficient solutions. The threat becomes more evident with the constantly growing world population. The research community must, therefore, focus on resolving the problem of high energy consumption. This paper proposes a model of energy scheduling in agricultural contexts. Greater energy efficiency is achieved by means of PV (photovoltaics) and hydropower, as demonstrated in the conducted case study. The developed model is intended for contexts where the farm is located near a river, so the farmer can use the flowing water to produce energy. Moreover, the model has been emulated using a variety of state-of-the-art laboratory devices. Optimal energy scheduling is performed via a decision tree approach, optimizing the use of energy resources and reducing electricity costs. Finally, a realistic scenario is presented to show the technical features and the practical behaviors of each emulator when adapting the results of the decision tree. The research outcomes demonstrate the importance of the technical validation of each model. In addition, the results of the emulation reveal practical issues that had not been discovered during the theoretical study or during the simulation.

Sustainable Construction Technology Based on Building Modules

2014 ◽  
Vol 1041 ◽  
pp. 231-234 ◽  
Author(s):  
Mária Kozlovská ◽  
Pavol Kaleja ◽  
Zuzana Struková
Keyword(s):  
Traditional Method ◽  
Sustainable Construction ◽  
Construction Technology ◽  
Modular Construction ◽  
Construction Methods ◽  
House Construction ◽  
Traditional Construction ◽  
Family House ◽  
Bearing Structure

The aim of the paper is to demonstrate the widely presented benefits of modular construction as compared with traditional construction method. A case study of family house construction by modular building method and traditional method is used to examine the structural, economic and time indicators of individual construction methods. The results are presented in tabular and graphical outputs and are compared each other in regard to different technological parts of the building. The paper provides the comparison of economic and time indicators resulting from budgets and time schedules of construction that are executed for different variants. Such comparison demonstrates exactly the benefits of modular construction. The building based on building modules consisted of steel bearing structure and enveloped by sandwich panels is adopted as the selected modular construction technology. The different variant, applied for comparison of modular and traditional construction, is represented by the building with comparable thermo-technical characteristics, constructed by traditional masonry method.

scholarly journals From Gothic to Bauhaus: A Lineage for Modern Curtain Wall Façade Construction

2021 ◽  
Author(s):  
H Rushton ◽  
Guy Marriage ◽  
Marc Aurel Schnabel
Keyword(s):  
Cultural Context ◽  
New Technology ◽  
Curtain Wall ◽  
Construction Methods ◽  
Industrial Age ◽  
Three Stages ◽  
Post Industrial ◽  
Relationship Of ◽  
The Relationship

From the craft production of the Gothic to the standardised industrial production of the Bauhaus, this research follows the development of modern architecture and the evolution of façade construction. This paper examines how, as technology has continued to advance and modes of production have evolved, complete dematerialisation - defined in this paper as a non-structural glass exterior walls - of the façade was achieved with the curtain wall. This research aimed to establish a link between Gothic and Bauhaus architecture to propose a lineage for modern curtain wall façade production and construction. The paper argues that changing modes of production is in response to construction issues, technological innovation and are dependent on the socio-cultural context of a specific time. Presenting a lineage that places this evolution into three stages - pre-industrial, industrial, and post-industrial - the relationship of architecture, technology and how construction methods respond to new technology will be illustrated. This paper will examine the curtain wall's arrival in New Zealand as a case study for the international dissemination of this system, to conclude with a discussion that outlines how the architecture of a post-industrial age both favours and can produce customised and complex façades.

scholarly journals From Gothic to Bauhaus: A Lineage for Modern Curtain Wall Façade Construction

2021 ◽  
Author(s):  
H Rushton ◽  
Guy Marriage ◽  
Marc Aurel Schnabel
Keyword(s):  
Cultural Context ◽  
New Technology ◽  
Curtain Wall ◽  
Construction Methods ◽  
Industrial Age ◽  
Three Stages ◽  
Post Industrial ◽  
Relationship Of ◽  
The Relationship

From the craft production of the Gothic to the standardised industrial production of the Bauhaus, this research follows the development of modern architecture and the evolution of façade construction. This paper examines how, as technology has continued to advance and modes of production have evolved, complete dematerialisation - defined in this paper as a non-structural glass exterior walls - of the façade was achieved with the curtain wall. This research aimed to establish a link between Gothic and Bauhaus architecture to propose a lineage for modern curtain wall façade production and construction. The paper argues that changing modes of production is in response to construction issues, technological innovation and are dependent on the socio-cultural context of a specific time. Presenting a lineage that places this evolution into three stages - pre-industrial, industrial, and post-industrial - the relationship of architecture, technology and how construction methods respond to new technology will be illustrated. This paper will examine the curtain wall's arrival in New Zealand as a case study for the international dissemination of this system, to conclude with a discussion that outlines how the architecture of a post-industrial age both favours and can produce customised and complex façades.

Case Study on Improving Energy Efficiency of Garment Materials by Women's Wear Style Transformation Design

2013 ◽  
Vol 712-715 ◽  
pp. 2870-2873
Author(s):  
Wei Zhen Wang ◽  
Cheng Gang Zheng ◽  
Lin Sun ◽  
Shi Wang ◽  
Man Qian Wang ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Structural Design ◽  
Design Method ◽  
High Energy ◽  
Green Economy ◽  
Environment Friendly ◽  
Clothing Style ◽  
Consumption Situation ◽  
High Energy Consumption

In view of high energy consumption situation in the apparel industry in the background of green economy, the author explores the multi-functional structural design method for single garment and the diversified wearing forms of single product according to the study on clothing style change, so as to satisfy the individualized and special needs of consumers. This not only improves the energy efficiency of clothing materials, but also optimizes life cycle of products, and accordingly promotes the environment-friendly clothing philosophy and provides new solution to the contradiction between mass production and individualized consumption of garments.

A Summer Case Study on Applying Ventilated Double-Skin Facade to a Building in Cold Zone of China

2012 ◽  
Vol 608-609 ◽  
pp. 1682-1685
Author(s):  
Hua Yang ◽  
Qian Zhao Wan ◽  
Bin Yang ◽  
Chunhua Sun ◽  
Guo Qiang Xia ◽  
...  
Keyword(s):  
High Energy ◽  
Indoor Temperature ◽  
Air Cavity ◽  
Indoor Space ◽  
Cold Zone ◽  
Double Skin ◽  
Lower Temperature ◽  
High Energy Consumption ◽  
Testing Room

It is crucial for ventilated double-skin facade (DSF) compared to single- skin facade to avoid high energy consumption, optic pollution and inadequate ventilation problems. In this paper, the performance of ventilated DSF applied to a building located in a university in cold zone (Tianjin) of China is tested. The original conditions of both outdoor and indoor within each testing room are comparatively same.The temperature behaviors of both the ventilated air cavity of DSF and indoor space with different experimental modes during summer are investigated. Additionally, the effects on indoor temperature due to the ventilated DSF with different modes in summer are also analyzed. The results shows that the ventilated DSF is a effective approach to reduce indoor temperature; the opening airflow windows of external façade of the DSF should be effective to lower temperature of both the ventilated air cavity of DSF and indoor space.

scholarly journals Cultural Sustainability and Vitality of Chinese Vernacular Architecture: A Pedigree for the Spatial Art of Traditional Villages in Jiangnan Region

2019 ◽  
Vol 11 (24) ◽  
pp. 6898 ◽  
Author(s):  
Qi Liu ◽  
Zaiyi Liao ◽  
Yongfa Wu ◽  
Dagmawi Mulugeta Degefu ◽  
Yiwei Zhang
Keyword(s):  
Vernacular Architecture ◽  
Fixed Time ◽  
High Energy ◽  
Cultural Changes ◽  
Rapid Urbanization ◽  
Data Resource ◽  
Construction Methods ◽  
Spatial Design ◽  
Traditional Construction ◽  
High Level

Presently, the rapid urbanization in contemporary cities in China has resulted in more buildings of low cultural value and high energy consumption. Many traditional Chinese villages exhibit special spaces that have been optimally adapted to the climatic and environmental features of the area using vernacular methods. The buildings in these villages can maintain the environment more sufficiently for the intended programs and consuming a lower level of resources. The construction technics and the artistic features in these spaces are invaluable and inspiring for contemporary architectural practices. This study aims to establish a pedigree of the artistic features exhibited in traditional Chinese villages to support sustainable development. This is to be achieved through thoroughly exploring the spatial design of these villages archived in a big-data resource. The pedigree integrates the dynamics (cultural changes over a certain period of time) and static (spatial features at a fixed time) of how the spaces in these villages have evolved. It is concluded that both a high level of sustainability and exceptional artistic quality have been achieved over a long history in many of these villages where traditional construction methods and design principals were employed.

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