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Acoustic emissions evaluation of the dynamic splitting tensile properties of steel fiber reinforced concrete under freeze–thaw cycling

Frontiers of Structural and Civil Engineering   Pages 1341-1356 doi: 10.1007/s11709-023-0988-4

Abstract: The dynamic splitting tensile damage characteristics were evaluated using acoustic emission (AE) parameter

Keywords： steel fiber reinforced concrete     freeze–thaw cycling     Brazilian disc splitting test     acoustic emissiontechnique     dynamic splitting tensile acoustic emission properties    

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Experimental investigation of a novel micro gas turbine with flexible switching function for distributed power system

Xiaojing LV, Weilun ZENG, Xiaoyi DING, Yiwu WENG, Shilie WENG

Frontiers in Energy 2020, Volume 14, Issue 4,   Pages 790-800 doi: 10.1007/s11708-020-0691-2

Abstract: Micro gas turbine (MGT) is widely used in small-scale distributed power systems because of its low emissions and fuel flexibility. However, the under-utilization of its exhaust heat and the low electric efficiency are the main bottlenecks that restrict its application. Additionally, the flexible switching between the power generated by the MGT and the power grid is also a key factor for keeping the secure operation of a distributed power station. Therefore, this paper conducted some experimental investigations of a 30 kW MGT to provide reference solutions for the above issues. This MGT is located at Shanghai Jiao Tong University (SJTU), which is designed by the Gas Turbine Research Institute of SJTU, and is manufactured by a turbo-machinery factory in Chongqing, China. The demonstration prototype is mainly composed of a single stage centrifugal compressor, a radial turbine, a combustor, a high-speed permanent magnet generator, and a control system. The results show that the MGT can achieve steady operation at a low rotational speed from 10000 r/min to 34000 r/min in the case of using oil lubricated bearings, which can greatly reduce the economic cost compared with the use of air bearings. At the same time, the ignition success rate of combustion chamber (CC) reaches 98% at a low rotational speed, and a wide range of stable combustion area can be obtained, because of the novel design method of combustor by referencing the way applied in an axial flow aero-engine. The MGT generating set can achieve functions, such as starting up, ignition, stable operation, loaded operation, grid-connection and stopping. This system also can realize flexibly switching from the start motor mode to the generator mode, and from grid-connected mode to off-grid mode, because the innovative multi-state switching control system is adopted. The above research work can make our state master independent intellectual property rights of micro gas turbine, rather than continue to be subject to the technological monopoly of the developed states, which can provide theoretical and experimental support for the industrialization of MGT in China.

Keywords： gas turbine     flexible switching system     control system     distributed power system     emission test    

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A new prediction method of industrial atmospheric pollutant emission intensity based on pollutant emission

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 1, doi: 10.1007/s11783-023-1608-1

Abstract:

● Established a quantification method of pollutant emission standard

Keywords： Industrial atmospheric pollutants     Pollutant emission standards     Quantitative method     Machine learning    

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Dissolved methane in anaerobic effluent: Emission or recovery?

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-022-1537-4

Abstract: intend to offer additional insights into the cost-benefit of dissolved methane recovery against its emission

Keywords： Anaerobic treatment     Municipal wastewater     Dissolved methane     Methane recovery     Carbon emission    

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Response of organic aerosol characteristics to emission reduction in Yangtze River Delta region

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1714-0

Abstract:

● The emission reduction causes significant change in organic aerosol

Keywords： Emission control     Secondary organic aerosol     Atmospheric oxidizing capacity     Holiday effects     COVID-19    

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Study on the Path of “Near-zero Emission” Coal-based Clean Energy Ecosystem Development

Zhang Yu-zhuo

Frontiers of Engineering Management 2014, Volume 1, Issue 1,   Pages 37-41 doi: 10.15302/J-FEM-2014007

Abstract: Developing a "near-zero emission" coal-based clean energy ecosystem bears great significance for thedelves into the development strategy, implementation pathways and key priorities of China's "near-zero emission

Keywords： near-zero emission     clean energy ecosystem     study on the path    

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Quantification of emission variability for off-road equipment in China based on real-world measurements

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1455-x

Abstract:

• Emissions from 53 in-use diesel-fueled off-road equipment were measured.

Keywords： Off-road equipment     Portable emission measurement system (PEMS)     Real-world emissions     Diesel engine    

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Target the neglected VOCs emission from iron and steel industry in China for air quality improvement

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1695-z

Abstract:

● Haze formation in China is highly correlated with iron and steel industry.

Keywords： Volatile organic compounds     Iron and steel industry     Air quality     Sinter flue gas emission    

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Life cycle carbon emission assessment of a multi-purpose university building: A case study of Sri Lanka

Ramya KUMANAYAKE, Hanbin LUO

Frontiers of Engineering Management 2018, Volume 5, Issue 3,   Pages 381-393 doi: 10.15302/J-FEM-2018055

Abstract:

Buildings are known to significantly affect the global carbon emissions throughout their life cycle. To mitigate carbon emissions, investigation of the current performance of buildings with regard to energy consumption and carbon emissions is necessary. This paper presents a process-based life cycle assessment methodology for assessing carbon emissions of buildings, using a multi-storey reinforced concrete building in a Sri Lankan university as a case study. The entire cradle-to-grave building life cycle was assessed and the life span of the building was assumed as 50 years. The results provide evidence of the significance of operation and material production stages, which contributed to the total carbon emissions by 63.22% and 31.59% respectively. Between them, the main structural materials, concrete and reinforcement steel made up 61.91% of the total carbon emitted at the material production stage. The life cycle carbon emissions of the building were found to be 31.81 kg·m−2 CO2 per year, which is comparable with the values obtained in similar studies found in the literature. In minimizing the life cycle carbon emissions, the importance of identifying control measures for both building operation and material production at the early design stage were emphasized. Although the other life cycle stages only contributed to about 5.19% of the life cycle carbon emissions, they should also receive attention when formulating control strategies. Some of the recommended strategies are introducing energy efficiency measures in building design and operation, using renewable energy for building operation and manufacturing of materials, identifying designs that can save mass material quantities, using alternative materials that are locally available in Sri Lanka and implementing material reuse and recycling. This study is one of the first to undertake a life cycle carbon emissions assessment for a building in the Sri Lankan context, with the hope of facilitating environmentally-friendly buildings and promoting sustainable construction practices in the country.

Keywords： carbon emission     life cycle assessment     buildings     sustainable construction     Sri Lanka    

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Combustion effects and emission characteristics of SO

Yiying JIN,Yangyang LI,Fuqiang LIU

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 201-210 doi: 10.1007/s11783-014-0739-9

Abstract: Besides, emission pattern experiments of NO , SO , CO and heavy metals were carried out in a high-temperatureResults showed that the conversion rate of NO and total emission of SO reduced with the increase of

Keywords： sewage sludge     combustion characteristic     coal     emission     heavy metals    

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Achieving air pollutant emission reduction targets with minimum abatement costs: An enterprise-level

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1459-6

Abstract:

• Quantification of efficiency and fairness of abatement allocation are optimized.

Keywords： Pollutant emission reduction allocation     Emission reduction measures     Total abatement cost     Economic    

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Carbon emission analysis of a residential building in China through life cycle assessment

Yin ZHANG,Xuejing ZHENG,Huan ZHANG,Gaofeng CHEN,Xia WANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 150-158 doi: 10.1007/s11783-014-0684-7

Abstract: In this paper, a quantitative life cycle model for carbon emission accounting was developed based onproduction, construction, use and maintenance, and demolition phases were assessed by building carbon emissionbuilding increases, its carbon emissions during the whole life cycle will rise as well but its unit carbon emission

Keywords： life cycle assessment     carbon emission     factor influence analysis    

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Mechanical performance analysis and stiffness test of a new type of suspension bridge

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1160-1180 doi: 10.1007/s11709-021-0760-6

Abstract: A stiffness test was carried out on the new type of suspension bridge with a small span, and the results

Keywords： new type of suspension bridge     stiffness test     mechanical performance     railway bridge     space truss    

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Accumulated damage process of thermal sprayed coating under rolling contact by acoustic emission technique

Jia XU,Zhen-yu ZHOU,Zhong-yu PIAO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3,   Pages 227-232 doi: 10.1007/s11465-016-0395-9

Abstract: Acoustic emission (AE) technique was introduced to monitor the RCF process of the coatings.

Keywords： accumulated damage     spray coating     rolling contact fatigue     acoustic emission    

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Mixed mode properties of CNT reinforced composites using Arcan test rig

Jacob MUTHU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 397-404 doi: 10.1007/s11709-015-0321-y

Abstract: Composite materials reinforced with carbon nanotubes were mechanical tested using Arcan test rig underArcan test rig was designed and fabricated to work with the Shimadzu testing machine.

Keywords： CNT     composites     Arcan test rig     stress intensity factor    

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Title Author Date Type Operation

Acoustic emissions evaluation of the dynamic splitting tensile properties of steel fiber reinforced concrete under freeze–thaw cycling

Journal Article

Experimental investigation of a novel micro gas turbine with flexible switching function for distributed power system

Xiaojing LV, Weilun ZENG, Xiaoyi DING, Yiwu WENG, Shilie WENG

Journal Article

A new prediction method of industrial atmospheric pollutant emission intensity based on pollutant emission

Journal Article

Dissolved methane in anaerobic effluent: Emission or recovery?

Journal Article

Response of organic aerosol characteristics to emission reduction in Yangtze River Delta region

Journal Article

Study on the Path of “Near-zero Emission” Coal-based Clean Energy Ecosystem Development

Zhang Yu-zhuo

Journal Article

Quantification of emission variability for off-road equipment in China based on real-world measurements

Journal Article

Target the neglected VOCs emission from iron and steel industry in China for air quality improvement

Journal Article

Life cycle carbon emission assessment of a multi-purpose university building: A case study of Sri Lanka

Ramya KUMANAYAKE, Hanbin LUO

Journal Article

Combustion effects and emission characteristics of SO

Yiying JIN,Yangyang LI,Fuqiang LIU

Journal Article

Achieving air pollutant emission reduction targets with minimum abatement costs: An enterprise-level

Journal Article

Carbon emission analysis of a residential building in China through life cycle assessment

Yin ZHANG,Xuejing ZHENG,Huan ZHANG,Gaofeng CHEN,Xia WANG

Journal Article

Mechanical performance analysis and stiffness test of a new type of suspension bridge

Journal Article

Accumulated damage process of thermal sprayed coating under rolling contact by acoustic emission technique

Jia XU,Zhen-yu ZHOU,Zhong-yu PIAO

Journal Article

Mixed mode properties of CNT reinforced composites using Arcan test rig

Jacob MUTHU

Journal Article