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Performance analysis of an air-source heat pump using an immersed water condenser
Jie JI, Huide FU, Hanfeng HE, Gang PEI,
《能源前沿(英文)》 2010年 第4卷 第2期 页码 234-245 doi: 10.1007/s11708-009-0056-3
关键词: air-source heat pump distributed model immersed water condenser
基于平板热管的新型直膨式辐射可调节供暖末端 Article
吴一凡, 孙弘历, 段梦凡, 林波荣, 赵恒昕, 刘兆鸿
《工程(英文)》 2023年 第20卷 第1期 页码 192-207 doi: 10.1016/j.eng.2021.09.019
建筑供暖电气化是实现碳中和目标的有效途径。作为一种清洁和可持续的电气化供暖技术,空气源热泵被广泛应用于缺乏集中供暖的地区。然而,现有末端形式存在难以同时实现间歇性和舒适性,且作为主要构件尚未较好地与空气源热泵匹配等问题。因此,本研究提出了一种与空气源热泵结合的新型辐射可调节供暖末端,以实现电气化节能减碳、间歇性和更好的热舒适性。针对辐射供暖末端目前存在三个主要问题,分别是峰值供热量受限、可调节性受限以及难以与空气源热泵结合,本文通过改进末端结构设计(改进A~E)提供了有效解决方案。研究结果表明,新末端能够将峰值供热量提升23.6%,并为使用者提供从10.1%到30.9%的可调辐射比。在此基础上,巧妙地借助平板热管减少了原有直膨式辐射供暖末端的制冷剂管路长度,进而改善了供暖末端的稳定性(利于回油)、间歇性(降低热惯性)和安全性(降低制冷剂泄漏风险)。此外,本文基于新末端提出了一种新的分阶段运行策略,可进一步提升末端的可调节性。本研究可以为电气化供暖助力建筑低碳提供一定参考。
The source and transport of bioaerosols in the air: A review
《环境科学与工程前沿(英文)》 2021年 第15卷 第3期 doi: 10.1007/s11783-020-1336-8
• Emission of microbe from local environments is a main source of bioaerosols.
关键词: Bioaerosols Diffusion Source identification Biogeography
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 579-592 doi: 10.15302/J-FASE-2023526
Nutrient pollution of air and water is a persistent problem in Europe. However, the pollution sources are often analyzed separately, preventing the formulation of integrative solutions. This study aimed to quantify the contribution of agriculture to air, river and coastal water pollution by nutrients. A new MARINA-Nutrients model was developed for Europe to calculate inputs of nitrogen (N) and phosphorus (P) to land and rivers, N emissions to air, and nutrient export to seas by river basins. Under current practice, inputs of N and P to land were 34.4 and 1.8 Tg·yr–1, respectively. However, only 12% of N and 3% of P reached the rivers. Agriculture was responsible for 55% of N and sewage for 67% of P in rivers. Reactive N emissions to air from agriculture were calculated at 4.0 Tg·yr–1. Almost two-fifths of N emissions to air were from animal housing and storage. Nearly a third of the basin area was considered as pollution hotspots and generated over half of N emissions to air and nutrient pollution in rivers. Over 25% of river export of N ended up in the Atlantic Ocean and of P in the Mediterranean Sea. These results could support environmental policies to reduce both air and water pollution simultaneously, and avoid pollution swapping.
关键词: agriculture air-water modeling European rivers nutrient pollution sewage systems source attribution
城市大气污染源追踪“广义判识”与Nudging源同化集成技术途径
徐祥德,丁国安
《中国工程科学》 2012年 第14卷 第10期 页码 10-22
提出了城市大气污染源追踪“广义判识”综合应用平台、模式源同化及其卫星遥感应用等新技术。“广义判识”综合应用平台包括气溶胶源主因子分析方法、气溶胶周期变化谱分析法、城市冠层大气污染变化规律同位相特性分析、追溯远距离空气污染源的合成风场相关矢量法、后向轨迹示踪法和边界层影响足痕分析法;另外,为解决长期以来大气污染模式中排放源不确定性的关键技术难点,采用源同化牛顿逼近Nudging技术,获取具有季节、月变化动态变化特征的SO2、NO2区域反演源排放清单。将卫星遥感资料应用在同化模型,探索空气污染预报模式的卫星遥感产品应用技术,卫星遥感—地基观测综合分析平台亦可广泛地应用于城市污染源追踪、城市雾和城市热岛的研究,并提出多圈层水—土—气综合分析方法是一种追踪水污染源的探索性尝试
Jie JI, Junrui DUAN, Huaxian WAN
《能源前沿(英文)》 2022年 第16卷 第6期 页码 1017-1026 doi: 10.1007/s11708-020-0716-x
关键词: flame interaction air entrainment flame height multi-point source model thermal radiation
Chuanjia JIANG, Pengyi ZHANG
《环境科学与工程前沿(英文)》 2012年 第6卷 第2期 页码 184-194 doi: 10.1007/s11783-011-0309-3
关键词: carbonyl compounds indoor air ventilation human occupancy source emission rate (SER) principal component analysis (PCA)
周丰峻,郑磊,孙云厚,张鏖,夏明
《中国工程科学》 2017年 第19卷 第6期 页码 18-26 doi: 10.15302/J-SSCAE-2017.06.004
本文基于点源爆炸理论,建立了面源、线源和点源TNT装药强爆炸解,填补了面源与线源强爆炸解的空白;采用真实空气状态方程进行分析计算,研究了真实空气条件下球形TNT装药爆炸近区冲击波的传播特性。通过算例分析,计算结果与已有文献资料数据吻合较好。本文的研究成果对爆炸力学和防护工程研究起到了重要的参考作用。
Development of source profiles and their application in source apportionment of PM
Ningning Zhang, Mazhan Zhuang, Jie Tian, Pengshan Tian, Jieru Zhang, Qiyuan Wang, Yaqing Zhou, Rujin Huang, Chongshu Zhu, Xuemin Zhang, Junji Cao
《环境科学与工程前沿(英文)》 2016年 第10卷 第5期 doi: 10.1007/s11783-016-0879-1
《环境科学与工程前沿(英文)》 2021年 第15卷 第6期 doi: 10.1007/s11783-021-1414-6
• Challenges in sampling of NH3 sources for d15N analysis are highlighted.
关键词: Aerosol ammonium Atmospheric gaseous ammonia Isotope fingerprinting Isotope-based source apportionment Ammonia gas-to-particle conversion
Fault tolerant control strategy for modular PWM current source inverter
《能源前沿(英文)》 2023年 第17卷 第2期 页码 228-238 doi: 10.1007/s11708-022-0852-6
关键词: current source converter (CSC) fault-tolerant control space vector modulation active damping resonance suppression power quality
Intercontinental transport of air pollution
Lin ZHANG,
《环境科学与工程前沿(英文)》 2010年 第4卷 第1期 页码 20-29 doi: 10.1007/s11783-010-0014-7
Health impacts of air pollution in China
《环境科学与工程前沿(英文)》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1367-1
•Impacts of air pollution on various body systems health in China were highlighted.
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 607-626 doi: 10.15302/J-FASE-2023517
As the common features of agroecosystems, ditches and ponds benefit the irrigation and drainage, as well as intercepting non-point source pollutants. However, most ditch-pond studies have been conducted in lowland areas. To test this source-sink assumption in upland areas, this study made observations on the ecological function of the ditch and pond system in a typical catchment in China. First, the changes in ponds in the catchment were analyzed using high-resolution remote sensing data. Then, the migration of agricultural pollutants in ditches and ponds were analyzed by field sampling and laboratory detection. The results showed that over the past 15 years the length of ditches in the catchment and the number of small ponds (< 500 m2) have increased by 32% and 75%, respectively. The rate of change in nutrient concentrations in the ditches and ponds were mostly from −20% to 20%, indicating ditches and ponds can be both sources and sinks for agricultural pollutants. Lastly, the contributing factors were explored and it was found that ditches and ponds are important sinks in dry season. However, during the rainy season, ditches and ponds become sources of pollutants, with the rapid drainage of ditches and the overflow of ponds in upland areas. The results of this study revealed that the ditches and ponds could be used for ecological engineering in upland catchments to balance drainage and intercept pollutants.
关键词: ditches ponds non-point source pollution mountainous areas nitrogen phosphorus
STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 503-509 doi: 10.15302/J-FASE-2023528
STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT
关键词: GREEN AGRICULTURAL PROMOTE POLLUTION SOURCE DEVELOPMENT POINT STRENGTHENING CONTROL
标题 作者 时间 类型 操作
Performance analysis of an air-source heat pump using an immersed water condenser
Jie JI, Huide FU, Hanfeng HE, Gang PEI,
期刊论文
HOTSPOTS OF NUTRIENT LOSSES TO AIR AND WATER: AN INTEGRATED MODELING APPROACH FOR EUROPEAN RIVER BASINS
期刊论文
induced by interaction burning of tri-symmetric propane fires in open space based on weighted multi-point source
Jie JI, Junrui DUAN, Huaxian WAN
期刊论文
Indoor carbonyl compounds in an academic building in Beijing, China: concentrations and influencing factors
Chuanjia JIANG, Pengyi ZHANG
期刊论文
Development of source profiles and their application in source apportionment of PM
Ningning Zhang, Mazhan Zhuang, Jie Tian, Pengshan Tian, Jieru Zhang, Qiyuan Wang, Yaqing Zhou, Rujin Huang, Chongshu Zhu, Xuemin Zhang, Junji Cao
期刊论文
δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source
期刊论文
DITCHES AND PONDS CAN BE THE SOURCES OR SINKS OF NON-POINT SOURCE POLLUTION: OBSERVATIONS IN AN UPLAND
期刊论文