scholarly journals Prediction of Life Cycle Carbon Emissions of Sponge City Projects: A Case Study in Shanghai, China

2018 ◽  
Vol 10 (11) ◽  
pp. 3978 ◽  
Author(s):  
Xiaohu Lin ◽  
Jie Ren ◽  
Jingcheng Xu ◽  
Tao Zheng ◽  
Wei Cheng ◽  
...  
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Carbon Sink ◽  
Carbon Sinks ◽  
Sponge City ◽  
Study Results ◽  
Accounting Model ◽  
Whole Life Cycle

In recent years, China has been vigorously carrying out the planning and implementation of Sponge City. Since the implementation of Sponge City projects involves substantial materials and energy consumption, it is significant to account corresponding carbon emissions and sinks. The existed studies about carbon emission of stormwater management measures, however, are not able to take the whole life cycle and different facilities into consideration. Therefore, this study develops a comprehensive accounting model based on Intergovernmental Panel on Climate Change (IPCC) guidelines and life cycle assessment (LCA) method to predict carbon emissions and carbon sinks of Sponge City projects more comprehensively and accurately. The model is applied to an actual residential community in Shanghai as a case study. Results show that the total indirect carbon emission is estimated to be 774,277 kg CO2 eq during a 30-year lifespan, among which carbon emissions from operation and maintenance phases are 2570 kg CO2 eq/year and 7309 kg CO2 eq/year, respectively, both directly proportional to the service life of the facilities. Three kinds of achievable carbon sinks are carbon sequestration in green space (5450 kg CO2 eq/year), carbon sink from rainwater utilization (15,379 kg CO2 eq/year) and carbon sink from runoff pollutant removal (19,552 kg CO2 eq/year). Carbon neutrality is expected to be reached after approximately 19 years. The established carbon emission accounting model can contribute to better planning and construction of Sponge City in China and enhance further energy conservation and carbon emission reduction.

scholarly journals Calculation and Evaluation of Carbon Footprint in Mulberry Production: A Case of Haining in China

2020 ◽  
Vol 17 (4) ◽  
pp. 1339 ◽  
Author(s):  
Yi Li ◽  
Yi Wang ◽  
Qing He ◽  
Yongliang Yang
Keyword(s):  
Life Cycle ◽  
Carbon Footprint ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Production Efficiency ◽  
Carbon Sink ◽  
Total Carbon ◽  
Ecological Environment ◽  
The Impact ◽  
Whole Life Cycle

Carbon footprint refers to the greenhouse gas emissions of an activity during the whole life cycle or a specific period of time. Mulberry is an important cash crop. Thus, establishing a standardized accounting method for the carbon footprint of mulberry production and analyzing its carbon emission scenarios is important in correctly understanding the impact of mulberry production on the environment. Using the life cycle assessment method and on the basis of the statistical data of mulberry production of urban farmers in Haining City, China, in 2014–2016, this study calculates and evaluates the carbon footprint of mulberry production. Results show the following. (1) Indirect carbon emissions is the main part of total carbon emissions, accounting for 85%–88% of total carbon emission, and industrial inputs (fertilizers and pesticides) are the main cause of carbon emissions. (2) The total carbon emissions per hectare in 2016 (6550.73 kgce/hm2) rose relative to the 2015 data (5617.92 kgce/hm2 at least in 2014) (5729.64 kgce/hm2). The output value of mulberry in spring was greater than that in summer and autumn, and the production efficiency of mulberry carbon in spring was higher than that in summer and autumn. The ecological environment of the mulberry production industry can be improved by increasing the resources of carbon sequestration and reducing the source of production input. (3) In general, the photosynthetic carbon sink of mulberry is greater than the total carbon emission and presents a positive externality to the ecological environment.

Analysis on Influence Factors for the Whole Life-Cycle Carbon Emissions of Highway and Carbon Accounting

2013 ◽  
Vol 869-870 ◽  
pp. 826-831
Author(s):  
Shuang Jian Jiao ◽  
Long Fei Li ◽  
Yan Wei Li
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Building Materials ◽  
Carbon Sink ◽  
Carbon Accounting ◽  
Radius Of Curvature ◽  
Transportation Industry ◽  
Highway Transportation ◽  
Whole Life Cycle

The CO2 emissions of highway transportation industry are huge. There are many factors which are affecting highway carbon emission. To reduce vehicle emissions, and improve the design, construction, operation and management of highway, which was the main purpose of the study. The whole life cycle of highway was divided into construction stage and operation stage. Factors which affected carbon emissions of different highway stages were discussed, and they were artificial carbon emissions, energy consumption of machinery and equipment, building materials, pavement types, low carbon management, types and carbon emission coefficients, running speed, radius of curvature of horizontal curve, road roughness, gradient of longitudinal curve, traffic volumes, plant carbon sink. Put forward the highway carbon emissions accounting methods, and established the carbon accounting models. The research will be helpful to reduce carbon emissions of highway transportation industry.

A Quantitative Research on Carbon Emissions in the Residential Area of China Based on LCP Theory

2014 ◽  
Vol 587-589 ◽  
pp. 536-540
Author(s):  
Lin Zeng ◽  
Tie Mao Shi ◽  
Yuan Man Hu
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Quantitative Research ◽  
Carbon Emission ◽  
Green Space ◽  
Carbon Sink ◽  
Residential Area ◽  
Energy Structure ◽  
Residential Areas ◽  
Total Life

As the residential area is the basic functional unit in the city, its number is large and its construction project is huge; accordingly, the CO2 emission is also huge in the process of construction and use. On the basis of the LCP theory and method, the researchers in this paper propose a new approach used to calculate the carbon emissions in the urban residential area through comprehensively considering the CO2 emission and CO2 absorption of carbon sink-green space in the total life cycle of the urban community. In addition, taking the typical multi-story residential areas in Shenyang City as the sample, the researchers calculate the carbon emission and discuss the features of emission in the residential area as well as the method and potential of reducing the carbon emission. The calculation results show that, the carbon emissions in the process of operation an use account for the largest proportion for the total life cycle, up to 83.8%; the carbon emissions in the process of preparing the materials for construction account for 7.69%; the carbon emissions at the stage of building demolition account for 5.32%. The carbon emissions at the stage of construction are the smallest in amount, which can be basically negligible. According to the existing energy structure, construction specifications and technical level, 4.8% of the CO2 emissions in the residential area can be absorbed through the green space and that the carbon emissions in the residential area can be reduced through taking the energy conservation measures, using the renewable energy and increasing the area of carbon sinks.

scholarly journals Carbon Footprint of Green Roofing: A Case Study from Sri Lankan Construction Industry

2021 ◽  
Vol 13 (12) ◽  
pp. 6745
Author(s):  
Malka Nadeeshani ◽  
Thanuja Ramachandra ◽  
Sachie Gunatilake ◽  
Nisa Zainudeen
Keyword(s):  
Life Cycle ◽  
Carbon Footprint ◽  
Carbon Emissions ◽  
Emission Reduction ◽  
Carbon Emission ◽  
Green Roof ◽  
Carbon Emission Reduction ◽  
Operational Phase ◽  
Flat Roof

At present, the world is facing many hurdles due to the adverse effects of climate change and rapid urbanization. A lot of rural lands and villages are merged into cities by citizens, resulting in high carbon emission, especially in the built environment. Besides, the buildings and the construction sector are responsible for high levels of raw material consumption and around 40% of energy- and process-related emissions. Consequently, the interest in defining the carbon footprint of buildings and their components is on the rise. This study assesses the carbon footprint of a green roof in comparison to a conventional roof in a tropical climate with the aim of examining the potential carbon emission reduction by a green roof during its life cycle. A comparative case study analysis was carried out between an intensive green roof and a concrete flat roof located on two recently constructed commercial buildings in the Colombo district of Sri Lanka. Data were collected from interviews, project documents and past literature in addition to on-site data measurements and a comparison of life cycle carbon emissions of the two roof types was carried out. The results revealed that the operational phase has the highest contribution to the carbon footprint of both roof types. In the operational phase, the green roof was found to significantly reduce heat transfer by nearly 90% compared to the concrete flat roof and thereby contributed to an annual operational energy saving of 135.51 kWh/m2. The results further revealed that the life cycle carbon emissions of the intensive green roof are 84.71% lower compared to the conventional concrete flat roof. Hence, this study concludes that the use of green roofs is a suitable alternative for tropical cities for improving the green environment with substantial potential for carbon emission reduction throughout the life cycle of a building.

scholarly journals Life cycle carbon emission of monorail transit and its comparison in operation stage with other city transit modes

2021 ◽  
Vol 272 ◽  
pp. 01013
Author(s):  
Teng Li ◽  
Eryu Zhu ◽  
Haoran Liu
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Light Rail ◽  
Operation Stage ◽  
Three Stages ◽  
Operation Phase ◽  
Whole Life Cycle ◽  
Manufacturing Stage ◽  
Beijing Subway

In this paper, carbon emissions of a monorail transit are calculated using the method of whole life cycle, which can be divided into four stages: material manufacturing stage, construction stage, operation stage and demolition stage. In the operation phase, the units are PKT (Passenger Kilometers Travelled) and VKT (Vehicle Kilometers Travelled), while in other three stages, the unit is 1 km. The results show that the carbon emissions from the 1km length monorail are 6271.204 tons. In addition, in the operation stage, it is found that the PKT index and VKT index of Chongqing monorail transportation are 0.07468 and 3.31933 respectively, far lower than those of subways in the same city. For PKT indicators of other rail transits, from small to large, they are light rail, tram, subway, APM and maglev. As for VKT indicators, from small to large, they are tram, light rail, subway, APM and maglev. The PKT index of Beijing subway is the lowest compared with that of other cities.

Carbon management framework for sustainable manufacturing using life cycle assessment, IoT and carbon sequestration

2019 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shraddha Mishra ◽  
Surya Prakash Singh
Keyword(s):  
Life Cycle ◽  
Carbon Sequestration ◽  
Real Time ◽  
Carbon Emissions ◽  
Emission Reduction ◽  
Carbon Emission ◽  
Carbon Sink ◽  
Time Data ◽  
Content Type ◽  
Real Time Data

Purpose Emission reduction methodologies alone are not sufficient to mitigate the climatic catastrophes caused due to ongoing carbon emissions. Rather, a bidirectional approach is required to decarbonize the excess carbon in the atmosphere through carbon sequestration along with carbon reduction. Since the manufacturing sector contributes heavily to the ongoing carbon emissions, the purpose of this paper is to propose a framework for carbon emission reduction and carbon sequestration in the context of the manufacturing industry. Design/methodology/approach In this paper, life cycle assessment (LCA) is employed to track the carbon emission at each stage of the product development life cycle. The pre-requisite for this is the accurate evaluation of the carbon emissions. Therefore, IoT technologies have been employed for collecting real-time data with high credibility to perceive environmental impact caused during the entire life cycle of the product. The total carbon emission calculation is based on the bill of material (BOM)-based LCA of the product to realize the multi-structure (from parts and components to product) as well as multi-stage (from cradle to gate) carbon emission evaluation. Carbon sequestration due to plantation is evaluated using root-shoot ratio and total biomass. Findings A five interwoven layered structure is proposed in the paper to facilitate the real-time data collection and carbon emission evaluation using BOM-based LCA of products. Further, a carbon neutral coefficient (CNC) is proposed to indicate the state of a firm’s carbon sink and carbon emissions. CNC=1 indicates that the firm is carbon neutral. CNC >1 implies that the firm’s carbon sequestration is more than carbon emissions. CNC <1 indicates that the firm’s carbon emission is more than the carbon sink. Originality/value The paper provides a novel framework which integrates the real-time data collection and evaluation of carbon emissions with the carbon sequestration.

scholarly journals A study on carbon emission calculation of residential buildings based on whole life cycle evaluation

2021 ◽  
Vol 261 ◽  
pp. 04013
Author(s):  
Mei Shang ◽  
Haochen Geng
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Building Materials ◽  
Residential Buildings ◽  
Calculation Model ◽  
Evaluation Theory ◽  
Calculation Results ◽  
Whole Life Cycle ◽  
Materials Preparation

The whole life cycle carbon emission of buildings was calculated in this paper. Based on the whole life cycle evaluation theory, a carbon emission calculation model was established by using a single urban building as an example. The whole life cycle building of carbon emission calculation includes five stages: planning and design, building materials preparation, construction, operational maintenance, as well as dismantlement. It provides a reference for standardizing the calculation process of building carbon emissions by analyzed the carbon emissions and composition characteristics of each stage of the life cycle of the case house. The calculation results demonstrate that the carbon emission during the operational maintenance and building materials preparation stages in the whole life cycle of the building account for 78.05% and 20.59% respectively. These are the two stages with the greatest emission reduction potential.

scholarly journals Estimation Method of Carbon Emissions in the Embodied Phase of Low Carbon Building

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Hongwei Liu ◽  
Jun Li ◽  
Yafei Sun ◽  
Yanshu Wang ◽  
Haichun Zhao
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Building Materials ◽  
Estimation Method ◽  
Carbon Surface ◽  
Emission Sources ◽  
Low Carbon ◽  
Emission Quota ◽  
Whole Life Cycle

The carbon emission at the embodied phase is a complex combination, extending the life cycle of the building, defining the process of the embodied phase scientifically and finding out the direct and indirect carbon emission sources in the embodied phase. Building materials have the characteristics of “low carbon surface, hidden high carbon.” Emission factor calculation method is used to establish carbon emission model for building materials. Considering the effect of design optimization on the carbon emissions of the whole life cycle of the building, a low carbon level system is set up to optimize the target of low carbon design. In the construction phase, the carbon emission sources, emission boundary, and calculation model are determined according to the subdivisional engineering division method. Through a series of process decomposition, the total amount of carbon emissions at the embodied phase can be obtained, and the carbon emission quota list at the embodied phase can be compiled to provide technical support for the carbon trading mechanism of the building.

scholarly journals Optimal Planning Method of Integrated Energy System Considering Carbon Cost from the Perspective of the Whole Life Cycle

2021 ◽  
Vol 897 (1) ◽  
pp. 012021
Author(s):  
Bin Bian ◽  
Zhihuan Du ◽  
Kui Zhou ◽  
Tao Huang ◽  
Fengbo Lv
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Carbon Dioxide Emissions ◽  
Carbon Emission ◽  
Evaluation Method ◽  
Energy System ◽  
Emission Model ◽  
Low Carbon ◽  
Integrated Energy System ◽  
Whole Life Cycle

Abstract China commits its goal of peak carbon dioxide emissions before 2030 and achieving carbon neutrality before 2060. The integrated energy system (IES) is one of the critical approaches to achieving the commitments. While the prevailing evaluation method for calculating the carbon emissions of IES neglected parts of factors influence, the result could not reflect the carbon emissions comprehensively. Considering the insufficiency above, in this paper, the evaluation method of carbon emission based on the whole life cycle of IES is proposed. First, based on the IES energy hub model, a typical park’s carbon emission model has been established. Then, the carbon emission coefficients of energy and equipment in production, transportation and operation are analysed, respectively. Hence, a low-carbon operation optimisation model of the IES is proposed. Later, with the lowest annual carbon emission of the integrated energy system as the optimisation target, the IES’s optimal carbon emission allocation and operation plan are proposed, based on the balance between energy supply and demand in the process of energy and equipment use and operation. As a result, the carbon emission of the IES of the park reduces effectively.

scholarly journals Carbon Emission Estimation of Assembled Composite Concrete Beams during Construction

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1810
Author(s):  
Kaitong Xu ◽  
Haibo Kang ◽  
Wei Wang ◽  
Ping Jiang ◽  
Na Li
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Emission Reduction ◽  
Carbon Emission ◽  
Composite Beams ◽  
Total Carbon ◽  
Construction Process ◽  
Low Carbon ◽  
Carbon Emission Reduction ◽  
The Government

At present, the issue of carbon emissions from buildings has become a hot topic, and carbon emission reduction is also becoming a political and economic contest for countries. As a result, the government and researchers have gradually begun to attach great importance to the industrialization of low-carbon and energy-saving buildings. The rise of prefabricated buildings has promoted a major transformation of the construction methods in the construction industry, which is conducive to reducing the consumption of resources and energy, and of great significance in promoting the low-carbon emission reduction of industrial buildings. This article mainly studies the calculation model for carbon emissions of the three-stage life cycle of component production, logistics transportation, and on-site installation in the whole construction process of composite beams for prefabricated buildings. The construction of CG-2 composite beams in Fujian province, China, was taken as the example. Based on the life cycle assessment method, carbon emissions from the actual construction process of composite beams were evaluated, and that generated by the composite beam components during the transportation stage by using diesel, gasoline, and electric energy consumption methods were compared in detail. The results show that (1) the carbon emissions generated by composite beams during the production stage were relatively high, accounting for 80.8% of the total carbon emissions, while during the transport stage and installation stage, they only accounted for 7.6% and 11.6%, respectively; and (2) during the transportation stage with three different energy-consuming trucks, the carbon emissions from diesel fuel trucks were higher, reaching 186.05 kg, followed by gasoline trucks, which generated about 115.68 kg; electric trucks produced the lowest, only 12.24 kg.

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