scholarly journals Establishment and Evaluation of Energy Consumption, Carbon Emission, and Economic Models of Retreaded Tires Based on Life Cycle Theory

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Qiang Wang ◽  
Shaojie Wang ◽  
Li Jiang
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Energy Recovery ◽  
Carbon Emission ◽  
Reduction Rate ◽  
Cost Ratio ◽  
Profit Model ◽  
Carbon Reduction ◽  
Production Phase ◽  
Life Cycle Theory

This paper identifies the system composition of the life cycle of retreaded tires and constructs the energy consumption model, carbon emission model, and economic model of retreaded tires based on the life cycle theory. Moreover, the theoretical calculation model and method for the energy consumption, carbon emission, and economy at the production phase, transportation phase, usage phase, and reuse phase of retreaded tires are proposed. After that, this paper puts forward the energy substitution model, carbon reduction model, and cost profit model of five reuse methods of retreaded tires, namely, secondary retreading, mechanical pulverization, low-temperature pulverization, combustion decomposition, and combustion power generation. Finally, this paper proposes the evaluation index for the energy consumption, carbon emission, and economy in the life cycle of retreaded tires and quantitatively analyzes the energy consumption, carbon emission, and cost profit list in each phase of the life cycle of retreaded tires, obtaining the energy recovery rate, carbon reduction rate, and profit-to-cost ratio of the five reuse methods of retreaded tires. The main conclusions of this paper are as follows: the energy consumption and carbon emission of retreaded tires are the largest at the production phase, while the energy consumption and carbon emission are the lowest at the transportation phase. Among the five reuse methods, the energy recovery effect, carbon reduction rate, and economy of secondary retreading are the optimal ones, and the quantitative results show that retreading is the most effective way for the reuse of waste tires.

scholarly journals Mitigating the Energy Consumption and the Carbon Emission in the Building Structures by Optimization of the Construction Processes

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3287
Author(s):  
Alireza Tabrizikahou ◽  
Piotr Nowotarski
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Structural Optimization ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Construction Materials ◽  
High Energy ◽  
Building Structures ◽  
Life Cycle Stages ◽  
Reduction Of Energy Consumption

For decades, among other industries, the construction sector has accounted for high energy consumption and emissions. As the energy crisis and climate change have become a growing concern, mitigating energy usage is a significant issue. The operational and end of life phases are all included in the building life cycle stages. Although the operation stage accounts for more energy consumption with higher carbon emissions, the embodied stage occurs in a time-intensive manner. In this paper, an attempt has been made to review the existing methods, aiming to lower the consumption of energy and carbon emission in the construction buildings through optimizing the construction processes, especially with the lean construction approach. First, the energy consumption and emissions for primary construction materials and processes are introduced. It is followed by a review of the structural optimization and lean techniques that seek to improve the construction processes. Then, the influence of these methods on the reduction of energy consumption is discussed. Based on these methods, a general algorithm is proposed with the purpose of improving the construction processes’ performance. It includes structural optimization and lean and life cycle assessments, which are expected to influence the possible reduction of energy consumption and carbon emissions during the execution of construction works.

scholarly journals Energy consumption in the life cycle of plumbing fixtures

2018 ◽  
Vol 19 (1) ◽  
pp. 70-78
Author(s):  
A. Kalbusch ◽  
E. Ghisi
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Total Energy ◽  
The Self ◽  
University Campus ◽  
Southern Brazil ◽  
Total Energy Consumption ◽  
Production Phase ◽  
Use Phase

Abstract The main objective of this paper is to propose a method for quantifying the energy consumption in the life cycle of different plumbing fixtures. The method can be used to estimate the energy consumption in the production, use and disposal phases of plumbing fixtures. This allows for the comparison between the performances of different plumbing fixtures and the identification of the share of each phase on the energy consumption over the life cycle. The method was applied in a case study in Southern Brazil to quantify the energy consumption in the life cycle of two types of taps installed on a university campus. The total energy consumption in the life cycle of ordinary and self-closing taps used in the study was respectively, 177.71 MJ and 164.11 MJ over 4 years. Production accounted for 33% of the energy consumption share of the ordinary tap, while the use phase accounted for 65% and the disposal phase for 2%. For the self-closing tap, the production phase accounted for 46% of the energy consumption share, the use phase for 52% and the disposal phase for 2%. Therefore, considering the energy consumption in the life cycle, self-closing taps should be preferred over ordinary taps.

External Insulation Design Impacts on the Energy Consumption and Greenhouse Gas Emission of Building

2016 ◽  
Vol 847 ◽  
pp. 381-390 ◽  
Author(s):  
Yao Li ◽  
Xian Zheng Gong ◽  
Zhi Hong Wang ◽  
Hao Li ◽  
Miao Miao Fan
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Greenhouse Gas ◽  
Greenhouse Gas Emission ◽  
Gas Emission ◽  
Production Phase ◽  
External Insulation ◽  
Insulation Thickness ◽  
Building Life Cycle ◽  
Operation Phase

In order to determine the optimal parameters of the external insulation system and guide the energy saving and greenhouse gas emission reduction of building, a typical student dormitory building in Beijing was chosen as research object. The life cycle thinking and dynamic simulation method were used in the present investigation. The relationship between the expandable polystyrene (EPS) external insulation system design parameters and building energy consumption and greenhouse gas emission in each phase of materials production phase, operation phase and the whole life cycle was studied, systematically . The results show that the consumption of clay brick, concrete and cement mortar account for 98.1% of the total materials consumption, where concrete contributes most to both energy consumption (36.6%) and greenhouse gas emission (35.9%). Regarding the contribution to energy consumption and greenhouse gas emission for building life cycle, materials production phase accounts for 5.6%-18.8% and building operation phase takes up 80.6%-93.4%. With the increase of EPS insulation thickness, the energy consumption and greenhouse gas emission increase linearly in materials production phase, decrease in building operation phase, and have an optimization value in the building life cycle to reach the minimum when the heat transfer coefficient (K) is 0.3W / (m2 • K) equivalent to the EPS insulation thickness is 130mm. Building heating load reduces with the increases of insulation thickness, but the envelope thermal insulation performance has no significant influence on cooling load.

Indirect Carbon Emission Measurement of Electric Vehicle in China

2013 ◽  
Vol 470 ◽  
pp. 772-776 ◽  
Author(s):  
Shou Jun Huang ◽  
Yu Long Ren
Keyword(s):  
Life Cycle ◽  
Electric Vehicle ◽  
Carbon Emissions ◽  
Co2 Emission ◽  
Carbon Emission ◽  
Carbon Equivalent ◽  
Emission Measurement ◽  
Life Cycle Theory ◽  
Emission Standards ◽  
The Eu

The issue of carbon emissions by electric vehicle(EV) was studied using life cycle theory, and the work provided decision basis for creating China’s CO2 emission standards for auto. The results show that the carbon equivalent emission of coal-fired generation side per unit electricity consumed by EV is lower than the level of normal passenger car in China, but still higher than the forced limit on auto emission within the EU.

Research on Carbon Calculation of Rural Roofing Materials

2014 ◽  
Vol 641-642 ◽  
pp. 961-965
Author(s):  
Jun Liu ◽  
Lin Wang Li ◽  
Yan Lei Sun ◽  
Wei Qi
Keyword(s):  
Life Cycle ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Present Situation ◽  
Calculation Model ◽  
Raw Material ◽  
Calculation Formula ◽  
Life Cycle Theory ◽  
Reduce Energy Consumption ◽  
Roofing Materials

Based on the present situation of village building adopting the internationally recognized life-cycle theory, the life-cycle calculation model of carbon emission of rural roofing materials was put forward , the calculation boundary of carbon emissions was divided and the calculation parameters and calculation formula was determined. The result shows that: under reasonable assumptions, applying life cycle theory to carbon calculation of rural roofing materials is feasible. The rural roofing materials industry by improving production process to reduce energy consumption and selecting raw material in localization as far as possible can significantly reduce carbon emissions.

A Sensitivity Study of RAP Cost and Performance on its Life Cycle Benefits

2013 ◽  
Vol 723 ◽  
pp. 567-574 ◽  
Author(s):  
Chia Pei Chou ◽  
Ning Lee
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Life Cycle Cost ◽  
Sensitivity Study ◽  
Cost Ratio ◽  
Environmental Benefit ◽  
Emission Data ◽  
Carbon Reduction ◽  
Financial Perspective ◽  
And Performance

This study inspects the benefits of using RAP on both financial and environmental aspects from life cycle viewpoints. The Life Cycle Cost Saving (LCCS) and the Life Cycle Carbon Reduction (LCCR) of various RAP mixtures (RAP content 10%, 20%, 30%, and 40%) to the virgin mixture are introduced and applied in this study. Carbon emission data of associated materials are obtained from PaLATE database. According to calculations, the RAP mixtures corresponding cost ratio and service life ratio exceed certain thresholds to have advantages over virgin mixtures. From a financial perspective, the service life ratio of RAP mixtures to virgin mixtures must be larger than the cost ratio of these two materials. For environmental benefit, the service life of RAP mixtures must be over 70% (40% RAP) to 90% (10% RAP) of that of the virgin mixture.

Energy Calculation Model of Concrete Based on Life Cycle Assessment

2011 ◽  
Vol 287-290 ◽  
pp. 1217-1220
Author(s):  
Ping Gong
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Consumption ◽  
Calculation Model ◽  
Energy Calculation ◽  
Inventory Analysis ◽  
Life Cycle Theory ◽  
Energy Consumption Analysis ◽  
Set Up ◽  
Whole Life Cycle

The energy consumption of concrete is considered as the research object,and the life cycle theory is applied in the energy consumption analysis of concrete. the life cycle energy consumption inventory analysis of concrete is set up,the concrete’s whole life cycle is divided into four stage. Each stage’s energy consumption is carried out a detailed analysis. Based on the inventory analysis, an energy calculation model of concrete is established .

Life Cycle Analysis on Carbon Emission Reduction and Energy Saving by Using Slag as Alternative Materials in Cement Production

2015 ◽  
Vol 814 ◽  
pp. 411-417
Author(s):  
Yao Li ◽  
Yu Liu ◽  
Fei Fei Shi ◽  
Zhi Hong Wang ◽  
Xian Zheng Gong
Keyword(s):  
Power Generation ◽  
Life Cycle ◽  
Energy Consumption ◽  
Energy Saving ◽  
Recovery Rate ◽  
Emission Reduction ◽  
Carbon Emission ◽  
Waste Heat ◽  
Cement Production ◽  
Carbon Emission Reduction

The carbon emission and energy consumption of using slag as a secondary raw material in cement production was quantified and analyzed in this study. Moreover, the carbon emission reduction and energy saving potential of slag-based cement (SBC) production were identified based on the comparative analysis between SBC and traditional Portland cement (TPC). The results showed that the carbon emission of SBC is about 6.73%, which was lower than that of TPC. Compared with TPC, the energy consumption of SBC is slightly increased by 2.05%. In addition, it was found that the combustion of coal and the power generation were the main sources for carbon emission in the life cycle of slag utilization, which account for 83.39% and 10.16% of the total carbon emission. Therefore, reducing the consumption of energy and increasing the recovery rate of waste heat in cement production were the most effective methods to improve the environmental performance of SBC. In addition, the improvement potential analysis was carried out for SBC. The results indicated that if the recovery rate of waste heat could reach to that of the international advanced level (15.6%), the carbon emission and energy consumption of SBC would be reduced by about 2.20% and 5.71%, respectively. If the proportion of renewable energy utilizationin power generation increased to that of the average international level, the carbon emission and energy consumption of SBC would be declined by 5.26% and 9.35% respectively.

The Evaluation of Low-Carbon Building Based in Whole Life Cycle Theory

2015 ◽  
Vol 733 ◽  
pp. 313-316
Author(s):  
Yu Han Shao
Keyword(s):  
Life Cycle ◽  
Policy Evaluation ◽  
Carbon Emission ◽  
Low Carbon ◽  
Evaluation Tool ◽  
Efficient Tool ◽  
Life Cycle Theory ◽  
Whole Life Cycle

Developing Low-carbon building is the essential measure for our society transfers to low carbon economic society. Therefore, we need chose appropriate policy evaluation tool that can help authorities to make suitable construction policy. The carbon emission in whole life cycle theory is a efficient tool to evaluate the value of Low-carbon building.

Energy Consumption and Carbon Emission Analysis of Natural Graphite Anode Material for Lithium Batteries

2018 ◽  
Vol 913 ◽  
pp. 985-990 ◽  
Author(s):  
Si Wen Gao ◽  
Xian Zheng Gong ◽  
Yu Liu ◽  
Qi Qi Zhang
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Anode Material ◽  
Carbon Emission ◽  
Coke Oven ◽  
Graphite Anode ◽  
Total Carbon ◽  
Natural Graphite ◽  
Emission Analysis ◽  
Natural Graphite Anode

The production process of nature graphite anode material is divided into four stages, namely mining, beneficiation, purification and processing. Carbon emission and energy consumption during the whole process were quantified and analyzed in this study. The energy consumption and pollutant emissions in the production process were calculated in accordance with the method of life cycle assessment, and the carbon emission analysis was conducted by IPCC method. The life cycle energy consumption of 1 ton natural graphite anode material is 112.48GJ, and the processing stage contributes 41.71%. The results show that coke oven gas and raw coal are the main energy consumption in the whole life cycle of natural graphite anode material, which account for 32.33% and 23.41% of the total energy consumption, respectively. Furthermore, the carbon emission of 1 ton of natural graphite anode material is 5315.91kgCO2-eq, and mainly comes from raw coal and electricity which contribute 23.98% and 20.99% to the total carbon emission respectively, and CO2 is the largest carbon emission contributed 98.69% to total carbon emission. Finally, the carbon emissions are sensitive to the coke oven gas, raw coal, diesel and electricity, and insensitive to fuel oil.

Sign in / Sign up

Export Citation Format

Share Document