Process heating constitutes a significant share of final energy consumption in the industrial sector around the world.In this paper,a high-temperature heat pump(HTHP)using flash tank vapor injection technology(FTVI)is...Process heating constitutes a significant share of final energy consumption in the industrial sector around the world.In this paper,a high-temperature heat pump(HTHP)using flash tank vapor injection technology(FTVI)is proposed to develop low-temperature geothermal source for industrial process heating with temperature above 100°C.With heat sink output temperatures between 120°C and 150°C,the thermo-economic performance of the FTVI HTHP system using R1234ze(Z)as refrigerant is analyzed and also compared to the single-stage vapor compression(SSVC)system by employing the developed mathematical model.The coefficient of performance(COP),exergy efficiency(ηexe),net present value(NPV)and payback period(PBP)are used as performance indicators.The results show that under the typical working conditions,the COP andηexe of FTVI HTHP system are 3.00 and 59.66%,respectively,and the corresponding NPV and PBP reach 8.13×106 CNY and 4.13 years,respectively.Under the high-temperature heating conditions,the thermo-economic performance of the FTVI HTHP system is significantly better than that of the SSVC system,and the larger the temperature lift,the greater the thermo-economic advantage of the FTVI HTHP system.Additionally,the FTVI HTHP system is more capable than the SSVC system in absorbing the financial risks associated with changes of electricity price and natural gas price.展开更多
目的探讨7.0 T磁共振上三维血管壁成像技术(DANTE-FLASH)进行ApoE-/-小鼠颈动脉粥样硬化斑块成像的可行性。方法通过数值仿真优化成像参数,实现血管腔-壁对比度最大化。6只ApoE-/-小鼠和3只野生型小鼠在7.0 T MRI均行DANTEFLASH和流入...目的探讨7.0 T磁共振上三维血管壁成像技术(DANTE-FLASH)进行ApoE-/-小鼠颈动脉粥样硬化斑块成像的可行性。方法通过数值仿真优化成像参数,实现血管腔-壁对比度最大化。6只ApoE-/-小鼠和3只野生型小鼠在7.0 T MRI均行DANTEFLASH和流入流出饱和带的多层2D RARE(2D-IOSB-RARE)两种扫描。在管壁信噪比(SNRwall)、管腔信噪比(SNRlumen)、壁-腔对比噪声比(CNR)、管腔面积(LA)、和管壁面积(WA)方面分别对2D-IOSB-RARE和DANTE-FLASH序列进行比较。对于LA与WA,使用线性回归分析评估MR图像与病理图像测量结果的相关性。结果根据数值仿真结果,小鼠实验的DANTE模块采用了15°翻转角与150脉冲链。相较于2D-IOSB-RARE,DANTE-FLASH的CNR轻微降低(P<0.001),但层分辨率显著提高。组内相关系数(LA:ICC=0.94,P<0.001;WA:ICC=0.93,P<0.001)和Bland-Altman图显示出DANTE-FLASH和2DIOSB-RARE在评估LA和WA测量结果方面具有良好的一致性。MR图像与病理图像在定量测量LA(P<0.0001)和WA(P<0.0001)中呈现较强相关性。结论在7.0 T磁共振上,三维DANTE-FLASH黑血MR序列,可实现各向同性高空间分辨率成像,有利于ApoE-/-小鼠颈动脉粥样硬化病变的灵活显示和定量评估。展开更多
Italian Trade Commission (I.C.E) joined Ornella Bignami releasing the FABRIC FASHION FLASH AUTUMN-WINTER 2011-2012, in Intertex Shanghai, October.Enriched by an uninterrupted dialogue within the profession for over 25...Italian Trade Commission (I.C.E) joined Ornella Bignami releasing the FABRIC FASHION FLASH AUTUMN-WINTER 2011-2012, in Intertex Shanghai, October.Enriched by an uninterrupted dialogue within the profession for over 25 years, through a fine tuned skill in deciphering major trends and social changes, Ornella Bignami has earned a wide credibility in the field of textile industry, fashion and home textile products.展开更多
DAT(D em and A eration T ank,连续曝气池)-IAT(interm ittentA erationT ank,间隙曝气池)工艺是以SBR(序批式活性污泥法)工艺为基础,在满足连续进水的情况下,将连续曝气池和间歇曝气池串联而成的一种新的污水处理工艺。文中介绍了DAT-...DAT(D em and A eration T ank,连续曝气池)-IAT(interm ittentA erationT ank,间隙曝气池)工艺是以SBR(序批式活性污泥法)工艺为基础,在满足连续进水的情况下,将连续曝气池和间歇曝气池串联而成的一种新的污水处理工艺。文中介绍了DAT-IAT工艺的工作原理、技术优势、缺陷及DAT-IAT工艺的一个发展工艺——BD/DAT-IAT工艺。展开更多
基金supported by the Carbon Peak and Carbon Neutralization Science and Technology Innovation Special Fund of Jiangsu Province,China(No.BE2022859)Natural Science Foundation of Guangdong Province,China(No.2021A1515011763).
文摘Process heating constitutes a significant share of final energy consumption in the industrial sector around the world.In this paper,a high-temperature heat pump(HTHP)using flash tank vapor injection technology(FTVI)is proposed to develop low-temperature geothermal source for industrial process heating with temperature above 100°C.With heat sink output temperatures between 120°C and 150°C,the thermo-economic performance of the FTVI HTHP system using R1234ze(Z)as refrigerant is analyzed and also compared to the single-stage vapor compression(SSVC)system by employing the developed mathematical model.The coefficient of performance(COP),exergy efficiency(ηexe),net present value(NPV)and payback period(PBP)are used as performance indicators.The results show that under the typical working conditions,the COP andηexe of FTVI HTHP system are 3.00 and 59.66%,respectively,and the corresponding NPV and PBP reach 8.13×106 CNY and 4.13 years,respectively.Under the high-temperature heating conditions,the thermo-economic performance of the FTVI HTHP system is significantly better than that of the SSVC system,and the larger the temperature lift,the greater the thermo-economic advantage of the FTVI HTHP system.Additionally,the FTVI HTHP system is more capable than the SSVC system in absorbing the financial risks associated with changes of electricity price and natural gas price.
文摘Italian Trade Commission (I.C.E) joined Ornella Bignami releasing the FABRIC FASHION FLASH AUTUMN-WINTER 2011-2012, in Intertex Shanghai, October.Enriched by an uninterrupted dialogue within the profession for over 25 years, through a fine tuned skill in deciphering major trends and social changes, Ornella Bignami has earned a wide credibility in the field of textile industry, fashion and home textile products.
文摘DAT(D em and A eration T ank,连续曝气池)-IAT(interm ittentA erationT ank,间隙曝气池)工艺是以SBR(序批式活性污泥法)工艺为基础,在满足连续进水的情况下,将连续曝气池和间歇曝气池串联而成的一种新的污水处理工艺。文中介绍了DAT-IAT工艺的工作原理、技术优势、缺陷及DAT-IAT工艺的一个发展工艺——BD/DAT-IAT工艺。
