• Title/Summary/Keyword: $CO_2$ emission amount

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A Study on the Amount of Carbon Emission of Organic Materials through Life-Cycle Assessment (LCA) (전과정평과를 통한 유기농자재의 탄소배출량 산정연구 -유기질비료를 중심으로-)

  • Yoon, Sung-Yee;Kwon, Hyuk-Jun
    • Korean Journal of Organic Agriculture
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    • v.19 no.1
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    • pp.23-38
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    • 2011
  • ● The current world is suffering abnormal climate caused by global warming. The main cause of global warming is greenhouse gas such as carbon dioxide. The carbon labeling system and carbon traceability system being pushed ahead in the agricultural sector is the policy for responding to climate change to reduce greenhouse gas emissions. To make this policy more effective and enhanced, the amount of carbon emissions should be calculated based on the kind of crops or the various businesses in the agricultural sector. Therefore, in order to estimate the accurate amount of carbon emissions, it is necessary to establish carbon dioxide emission intensity of various agricultural materials added onto the agriculture, and to calculate the amount of carbon dioxide emission for each crop according to agricultural production. The purpose of this study is to establish the amount of emission, emission per agricultural materials, of agricultural materials being added for crop production as a basic step, and emission intensity which can be used in the future market in order to estimate accurate amount of carbon emission in all the policies being promoted in the agricultural sector. Therefore, in this study, in order to build LCI D/B about organic fertilizers among many organic materials added onto the organic agriculture sector, one leading company in organic fertilizer production was selected and LCA was conducted for this leading company. We had to build the intensity and integrated average concept of intensity upon the two cases once production farmers for their own consumption and farms besides organic fertilizer company were categorized even if it's little amount. But in this study, individually produced organic fertilizers were excluded. Calculated results are following. Carbon emission of mixed expeller cake fertilizer in organic fertilizer was 1,106,966.89kg-$CO^2$ and emission intensity was 0.01606kg-$CO^2$, respectively. Total emission of mixed organic fertilizers was 241,523.2kg-$CO^2$ and emission intensity was 0.01705kg-$CO^2$. And total emission of organic compound fertilizers was 94,592.66kg-$CO^2$ and emission intensity was 0.01769kg-$CO^2$, respectively.

Comparison between Congestion Levels and Amount of $CO_2$ Emissions on Arterials (단속류 간선도로에서 지정체와 $CO_2$ 배출량 비교)

  • Gang, Jin-Gu;O, Heung-Un
    • Journal of Korean Society of Transportation
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    • v.29 no.6
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    • pp.17-23
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    • 2011
  • It has been presumed that the amount of vehicle's $CO_2$ emission would highly related to vehicle's cruising speeds on highways. In this study, it was tested if vehicle's $CO_2$ emissions would relate to the types of highways and the level of congestion. The results showed that the amount of $CO_2$ emission changes depending on (1) the vehicles' cruising speeds (b) congestion levels, and (c) the types of intersections. It was found that the vehicle acceleration and deceleration methods increases the amount of $CO_2$ emission up to 12%. It was also found that it changed up to 30% and 40% depending on the level of congestion and the types of intersections, respectively. The findings imply that the amount of $CO_2$ emission from vehicles should be improved when vehicles' cruising speeds are well managed through congestion management.

Prediction of the Carbon Dioxide Emission Change Resulting from the Changes in Bovine Meat Consumption Behavior in Korea (우리나라 쇠고기 소비 행태 변화에 의한 이산화탄소 배출 변화량 예측)

  • Yeo, Min Ju;Kim, Yong Pyo
    • Journal of Korean Society for Atmospheric Environment
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    • v.31 no.4
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    • pp.356-367
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    • 2015
  • A consumption based study on the carbon dioxide ($CO_2$) emission change due to the changes in the bovine meat consumption behavior in Korea was carried out. It was found that if the consumption of bovine meat be reduced by half, the reduction amount of $CO_2$ emissions be over 0.8 $MtCO_2e$ in all senarios in 2023. This amount is equivalent to over 50% of the greenhouse gases (GHGs) emission reduction target in agriculture and forestry, and fishery, a significant reduction. It was also found that the $CO_2$ emission reduction amount in consumption-based approach was the largest when the consumption of the imported bovine meat be reduced, though the difference was not that large.

Comparison of Vehicle Carbon Emissions in Expressway and National Highway (고속도로와 국도에서 차량 당 탄소가스 배출량 비교 - 경부 고속도로와 1번국도의 비교를 중심으로 -)

  • Lee, Yoon-Seok;Oh, Heung-Un
    • International Journal of Highway Engineering
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    • v.13 no.3
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    • pp.177-184
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    • 2011
  • There are several differences between freeways and general national roads in terms of structures, conditions and limited speeds. Likewise, the characteristics of $CO_2$ emission in these roads differ depending on the road types. For these reasons, it is necessary to compare the two types of roads in terms of $CO_2$ emissions. The study was performed targeting Gyeongbu Expressway and National Highway 1. Firstly, the amount of $CO_2$ emission each car was compared in the whole sections of the both. Secondly, top 10 sections were picked out, and then $CO_2$ emission each section were compared. Lastly, two sections which were with the highest and lowest amount of $CO_2$ emission per car, were compared. As results, it were found that there were less amount of $CO_2$ emission on freeways. because cars are running on uniform velocity at relatively high speed, and that there were more amount of $CO_2$ emission on the national highway. because of frequent intersections and associated congestion. It may be concluded that the amount of $CO_2$ emission at the national highway could be reduced if signal coordination and intersection intervals are improved there.

CO2 Emission and Storage Evaluation of RC Underground Structure under Carbonation Considering Service Life and Mix Conditions with Fly Ash (탄산화 환경에 노출된 RC 지하구조물의 내구수명과 플라이애쉬 배합 특성을 고려한 탄소 배출 및 흡착 평가)

  • Kim, Seong-Jun;Mun, Jin-Man;Lee, Hack-Soo;Kwon, Seung-Jun
    • The Journal of the Korea Contents Association
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    • v.14 no.12
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    • pp.999-1009
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    • 2014
  • In this paper, $CO_2$ emission and storage amount are evaluated for real RC (Reinforced Concrete) underground structure considering $CO_2$ amount including material manufacturing, moving, and construction, repairing timing stage regarding extended service life. Four mix proportions with mineral admixtures are prepared and $CO_2$ diffusion coefficient are obtained based on a micro modeling. Referred to carbonation durability limit state, $CO_2$ emission and storage amount are evaluated, which shows higher initial $CO_2$ emission is caused due to larger unit content of cement and the storage increases with more rapid carbonation velocity. Furthermore various $CO_2$ concentration is adopted for simulation of $CO_2$ evaluation including measured $CO_2$ concentration (600ppm). With higher concentration of $CO_2$ outside, carbonation velocity increases. In order to reduce $CO_2$ emission through entire service life, reducing initial $CO_2$ emission through mineral admixture like fly ash is more effective than increasing $CO_2$ storage through OPC since $CO_2$ is significantly emitted under manufacturing OPC and $CO_2$ storage in cover concrete of RC structure is not effective considering initial concrete amount in construction.

Analysis of the $CO_2$ emission amount and characteristics of combined heat and power plants in industrial complex by using the fuel analysis method (연료분석 방법을 적용한 산업단지 열병합발전소 이산화탄소 배출량 및 배출특성분석)

  • Kang, Seok-Hun;Chung, Dae-Hun
    • Proceedings of the SAREK Conference
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    • 2008.06a
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    • pp.1243-1248
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    • 2008
  • $CO_2$ emission amount and characteristics of combined heat and power (CHP) plant in industrial complex of Korea is evaluated by using the fuel analysis method. Fuel analysis methods of several foreign countries and developed one which is developed considering the operation characteristics of the surveyed CHP plants are used. The operation data is surveyed for all of the CHP plants in industrial complex and is composed of fuel consumption amount, generation, sale and efficiency of heat and electricity, condensed steam enthalpy, and etc of the each CHP.

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Calculation of CO2 Emission w.r.t. Instantaneous Generator Output using Input-output Coefficients of Thermal Power Plant (화력발전소 입출력 특성계수를 이용한 순시 발전출력 대비 CO2 대기배출량 계산)

  • Lee, Sang-Joong;Lim, Jeong-Kyun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.5
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    • pp.120-125
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    • 2007
  • Burning the fossil fuel in the thermal power plants causes green house gas emission. Monitoring of CO2 emission of the thermal power plants is growing more important because the amount produced by them is more than 20 percent of national total emission. This paper proposes a method to calculate the amount of the CO2 emission w.r.t. generator[MW] output using the input-output coefficients of the thermal power plants. The power flow computation together with the CO2 emission calculation are demonstrated in a sample power system.

Methodology Developments based on CO2 Emission Information from Construction Equipment for Greenhouse Gas Regulations (온실가스 규제에 대비한 건설장비 이산화탄소 배출량정보 활용방법론 개발)

  • Go, Jee-Eun;Lee, Jin-Woo;Chae, Yoon-Byung;Han, Seungwoo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.05a
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    • pp.35-36
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    • 2018
  • According to the nation's greenhouse gas emission statistics, greenhouse gas emissions have been stiffly increasing. Accordingly, the importance of CO2 reduction is more getting focused over the world. This trend makes the construction equipment be considered as a major target of reduction due to the large volume of emission. This study suggests the feasible methodology for estimating CO2 emission from construction equipment and for being easily applied on the job sites. The methodology is based on the collection from the segmented CO2 emission information of construction equipment. This study allows site personnels to estimate the total amount of CO2 and to take appropriate actions for reasching the environmental regulations.

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An Analysis of $CO_2$ Emission Structure in Korean Industry Using Hybrid IO Table (하이브리드 산업연관표를 이용한 우리나라 $CO_2$ 배출 구조 분석)

  • Park, Chang-Gui
    • Journal of Environmental Policy
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    • v.8 no.1
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    • pp.49-72
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    • 2009
  • To analyze the direct and indirect $CO_2$ emission structure according to industries in Korea, a hybrid IO table quantifying the section of energy in the IO table is needed. However, the results of the recent researches revealed differences in the total amount of $CO_2$ emission by researchers in addition to significant standard deviation in industrial distribution. This study intends to make comparative analysis of the existing method of making an IO table for energy and environment and presents an improvement scheme to contribute to an improvement in calculation of the total amount of $CO_2$ emission and estimation of the emission by industries in Korea. For this purpose, division was made into use as raw materials of energy and that as fuel and a new hybrid IO table was made by removing confounding factors caused by the product tax and subsidies. As a result, the oil and coal industry emitted 5.2 times less $CO_2$ after removing energy inputted as raw materials from the transaction table than before. The amount of $CO_2$ emission estimated by using the IO table based on basic price was found to be 2.7% less than by using the IO table based on the producer price.

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Predicting the CO2 Emission of Concrete Using Statistical Analysis

  • Hong, Tae-Hoon;Ji, Chang-Yoon;Jang, Min-Ho;Park, Hyo-Seon
    • Journal of Construction Engineering and Project Management
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    • v.2 no.2
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    • pp.53-60
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    • 2012
  • Accurate assessment of $CO_2$ emission from buildings requires gathering $CO_2$ emission data of various construction materials. Unfortunately, the amount of available data is limited in most countries. This study was conducted to present the $CO_2$ emission data of concrete, which is the most important construction material in Korea, by conducting a statistical analysis of the concrete mix proportion. Finally, regression models that can be used to estimate the $CO_2$ emission of concrete in all strengths were developed, and the validity of these models was evaluated using 24 and 35MPa concrete data. The validation test showed that the error ratio of the estimated value did not exceed a maximum of 5.33%. This signifies that the models can be used in acquiring the $CO_2$ emission data of concrete in all strengths. The proposed equations can be used in assessing the environmental impact of various construction structural designs by presenting the $CO_2$ emission data of all concrete types.