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Start Over Author "Guo, Yanyan" Publication Type Academic Journals
537 results on '"Guo, Yanyan"'

3. 我国大豆油脂加工业碳排放测算与减排分析 ——以某大豆油脂加工企业为例Carbon emission measurement and emission reduction analysis of soybean oil processing industry in China: Taking a soybean oil processing enterprise as an example

Author

韩建军， 郭妍妍， 郭志涛， 杨雅冰， 张梦琪 HAN Jianjun, GUO Yanyan, GUO Zhitao, YANG Yabing, ZHANG Mengqi

Subjects
二氧化碳排放量；碳减排；大豆油脂加工, carbon dioxide emission, carbon reduction, soybean oil processing, Oils, fats, and waxes, TP670-699
Abstract

为服务于碳减排国家战略，以某典型大豆油脂加工企业为研究对象，明确碳排放计算边界，梳理能耗指标变化，采用碳排放系数法确定该企业二氧化碳排放量，推算2015—2022年我国大豆油脂加工业二氧化碳排放量，并提出碳减排措施。结果表明：2020年前该企业二氧化碳排放量为0.111 t/t（以大豆计），2020年后经工艺改进其二氧化碳排放量为0.097 t/t（以大豆计）；大豆油脂加工业二氧化碳排放量在2017年达到峰值，为1 095万t；如加工能耗稳定下降，虽然2030年大豆消费量达到最大值(1.26亿t)，大豆油脂加工业二氧化碳排放量仍在2017年达峰；蒸汽消耗和电耗是影响油脂加工碳排放的主要因素。为推动碳减排目标实现，大豆油脂加工业碳减排路径主要是通过持续管理和工艺改进，降低蒸汽用量和电耗。In order to serve the national strategy of carbon reduction, a typical soybean oil processing enterprise was taken as the research object, the calculation boundary of carbon emission was clarified, changes in energy consumption indicators were sorted out, and the carbon emission coefficient method was used to determine the carbon dioxide emission of the enterprise. The carbon dioxide emission of soybean oil processing industry in China from 2015 to 2022 were calculated, and carbon reduction measures were proposed. The results showed that before 2020, the carbon dioxide emission of the enterprise was 0.111 t/t (based on soybean), and after 2020, after process improvement, the carbon dioxide emission was 0.097 t/t (based on soybean). The carbon dioxide emission of the soybean oil processing industry reached its peak in 2017, reaching 10.95 million tons. If the processing energy consumption steadily decreases, although the soybean consumption will reach its maximum value (126 million tons) in 2030, the carbon dioxide emission of the soybean oil processing industry was still at its peak in 2017. Steam and electricity consumption are the main factors influencing the carbon emission of oil processing industry. To promote the achievement of carbon reduction targets, the main carbon reduction path of soybean oil processing industry is to reduce steam and electricity consumption through continuous management and process improvement.

Published
2024
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14. Heterologous survey of 130 DNA transposons in human cells highlights their functional divergence and expands the genome engineering toolbox

Author

Zhang, Tongtong, Tan, Shengjun, Tang, Na, Li, Yuanqing, Zhang, Chenze, Sun, Jing, Guo, Yanyan, Gao, Hui, Cai, Yujia, Sun, Wen, Wang, Chenxin, Fu, Liangzheng, Ma, Huijing, Wu, Yachao, Hu, Xiaoxuan, Zhang, Xuechun, Gee, Peter, Yan, Weihua, Zhao, Yahui, Chen, Qiang, Guo, Baocheng, Wang, Haoyi, and Zhang, Yong E.

Published
2024
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38. Effect of Rolling Process on Microstructure Morphology and Internal Stress of Steel Plate

Author

GAO Peng, ZHUO Yue, GUO Yanyan, SUN Guodong, SUN Jianliang

Subjects
thermal mechanical coupling, rolling process, pipeline steel, microstructure, internal stress, Materials of engineering and construction. Mechanics of materials, TA401-492, Technology
Abstract

For studying the influence of different rolling processes on the microstructure morphology and internal stress of pipeline steel， the temperature field and stress field of steel plate under different processes were studied by rolling process experiment and thermal mechanical coupling numerical simulation. Subsequently， the microstructure morphology and internal stress of steel plate were tested and analyzed by metallographic microscope and XRD. The results of an actual measurement of the surface temperature of steel plate showed that the error between the simulated value and the measured value was small， and the temperature field calculated by numerical simulation was reasonable，which could be the basis for stress field analysis. After the steel plate was water-cooled for 20 s，the maximum and minimum temperature differences between the steel plate core and corner were 318 ℃and 211 ℃respectively. The maximum and minimum stress difference between the core and corner of the steel plate was 417 MPa and 260 MPa respectively. In addition， the obtained microstructure was composed of bainite，martensite and ferrite. It could be concluded from the results of experiments and numerical analysis that， it was reasonable to control the final rolling temperature at 800～900 ℃and the cooling rate at 20 ～25 ℃/s. Under these process parameters， the phase transformation nucleation rate of the steel plate was high， the internal stress difference was small， and a mixed microstructure comprising of martensite， bainite and ferrite was finally formed.

Published
2022
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