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多能互补的综合能源供热系统工程设计及优化 [PDF]

open access: yes全球能源互联网, 2021
多能互补的综合能源供热系统能够利用各种能源的特点,提高能源利用效率及经济性。针对综合能源供热系统,从建筑物的逐时热负荷预测及建立通用的供热设备参数优化方法两个方面展开研究。依据室内热平衡方程、建筑物围护结构传热模型、供热末端传热模型,建立建筑物热负荷、室内温度及供热末端所需最低供水温度的联合计算模型。以每个时刻供热成本最低为原则,考虑到不同供热设备供水温度与供热末端所需供水温度相容性,建立综合能源供热系统实时调度模型。基于前述的调度模型,采用遍历算法,计算不同参数组合的供热设备所对应的供热系统年化总费用,
熊显智   +4 more
doaj   +1 more source

Combined Drying of Heat Pump with Hot Air for Southern Corrugated Rice Noodles(南方波纹米粉丝的热泵-热风组合干燥工艺研究) [PDF]

open access: yesShipin kexue jishu xuebao, 2018
With the dry effect evaluating value, comprehensively reflecting the product quality, energy consumption, and drying rate during drying of southern corrugated rice noodles.
LI Jianxiong(李健雄)   +8 more
doaj   +1 more source

基于数值求解的油浸式变压器瞬态热点温度计算

open access: yesGaoya dianqi, 2023
文中分析了变压器温度流体场耦合数值仿真求解方法,基于互感器小模型的温度流体场计算确定了瞬态数值求解的时间步长和迭代步数,进而对一台S13-M-100kVA/10kV型油浸式变压器的三维温度流体场进行了瞬态数值仿真。与预埋光纤的变压器温升试验获得的绕组瞬态热点温度相比,变压器绕组瞬态热点温度数值仿真结果与试验结果最大偏差不超过3%,基于经验公式计算的热点温度平均相对偏差为9.8%,验证了文中变压器温度流体场仿真模型的有效性及准确性。
张健   +4 more
doaj  

分体式油浸自冷变压器三维温度场和流场仿真与分析

open access: yesGaoya dianqi, 2021
分体自冷式变压器内部温度场的仿真分析多基于二维仿真,缺乏对油流流场影响的分析。文中建立110 kV水平分体式油浸自冷变压器的三维全尺寸模型,采用有限元分析方法仿真变压器内部温度场和流速场的分布,研究变压器本体与散热器间的水平布置距离对温度场和流速场的影响,分析变压器流场和温度场的耦合关系,并采用短路法温升试验验证仿真结果的准确性。结果表明,变压器内部热点出现在低压绕组B相两侧距绕组底部约0.68 H处,热点温度达369.7 K。随着变压器本体与散热器间的水平布置距离的增大 ...
蒋惠中   +5 more
doaj  

Designing Additive‐Manufactured High‐Performance CoCrNi Matrix Composites Based on Grain Boundary Segregation

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Through grain boundary segregation engineering, a crack‐free high‐strength CoCrNi medium‐entropy alloy (MEA) can be successfully fabricated via laser powder bed fusion (PBF‐LB). The influence of micron‐sized TiC particles on microstructural evolution, grain boundary segregation behavior, and mechanical properties was systematically ...
Cunliang Pan   +9 more
wiley   +1 more source

Boosting Thermoelectric Properties of BiSbSe3 Through Ag‐Induced Interstitial Occupancy and Multi‐Phase Microstructure

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Te‐free BiSbSe3 is a promising medium‐temperature thermoelectric (TE) material owing to its cost‐effectiveness and intrinsically low lattice thermal conductivity. However, its comparatively low electrical conductivity has severely hindered the optimization of TE performance.
Xiaowei Shi   +10 more
wiley   +1 more source

油浸式变压器内外辐射传热的数值分析

open access: yesGaoya dianqi, 2022
热点温度是衡量油浸式变压器绝缘性能和安全裕度的重要指标,对其进行快速和准确地计算具有重要的意义。文中研究了油浸式变压器的内外辐射传热机理,依据辐射传递方程(RTE)和斯蒂芬—波尔茨曼方程建立了辐射传热数值计算模型。以一台110 kV油浸式变压器为例,通过有限元仿真对其内外辐射传热过程进行了数值分析。结果显示,忽略内辐射过程引起的绕组热点温度误差小于2%,并且能够提升33%的计算效率。外辐射换热系数与对流换热系数处于同一数量级,对绕组热点温度影响达到16%,在数值计算中不可被忽略。
卢仰泽   +4 more
doaj  

A link between increased temperature and avian body condition in a logged tropical forest

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi   +7 more
wiley   +1 more source

Effects of landscape context on avian specialist response to increased surface temperature in protected areas

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge   +2 more
wiley   +1 more source

Boosting Thermoelectric Performance of Cu3SbSe4‐Based Diamond‐Like Compounds via Multi‐Scale Microstructure Engineering

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Harnessing the potential of thermoelectric technology to convert waste heat into electricity, this study sought to enhance overall energy utilization efficiency and contribute to sustainable development through the advancement of environmentally friendly direct‐conversion materials.
Wenying Wang   +8 more
wiley   +1 more source

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