长沙市大型专业市场分布与演化对城市空间结构形态的影响研究

本文以城市规划学,城市地理学,商业地理学为理论基础,分析长沙专业市场形成机制与演变发展过程;运用城市空间理论与空间分析方法,剖析长沙市大型专业市场对长沙城市空间结构形态发展的动态影响以及所带来的城市问题;提出长沙专业市场的演变与分布的动态过程扩张了长沙城市空间,影响到城市空间结构由组团式扩展形态转变为紧凑型层圈式扩展形态,更替了城市空间结构元素。     

基于图像识别的长沙历史步道街景色彩研究

文章旨在基于图像识别技术与街景图像大数据,对长沙历史步道范围内街景色彩进行定量分析与数字化研判。以长沙历史步道的街景数据为依托,通过建筑图像的语义分割、图像色彩特征的提取与统计分析,揭示出长沙历史步道街景的色彩规律和特点,系统地评价了长沙历史步道街景色彩的空间分布现状,并从建筑界面、标志导视、过渡空间三个微观角度,提出长沙历史步道色彩管控和优化的指导建议,为深入探究长沙历史色彩肌理的延续和城市色彩良性发展提供有益的参考。     

浅析长沙文化产业国际化发展战略

本文针对国际国内文化产业发展的形势与背景,结合长沙文化产业发展的条件与现状,对长沙文化产业的空间布局进行了阐述,并提出了发展对策及建议。     

长沙近现代工业遗产保护与再利用研究

通过回顾长沙近现代工业发展历程,明确了长沙工业遗产的价值,揭示了近现代工业遗产保护工作的紧迫性,从工业遗存现状调查中分析了长沙在工业遗产保护和利用中存在的问题,并提出了对策与建议。     

长沙城市现代化的评价指标体系构建及比较研究

在总结、分析国内外城市现代化评价指标体系理论与方法的基础上,结合长沙自身发展特色,初步构建了一套包含8个一级指标、35个二级指标的长沙市城市现代化评价指标体系,运用AHP法纵向评价长沙近期(2022年)、远期(2030年)城市现代化实现程度。同时,选取领先型城市、追赶型城市、借鉴型城市,横向比较长沙实现现代化的差距,通过纵、横向比较研究直观地看到长沙在现代化体系中存在的优势与不足,据此提出长沙加速现代化进程的对策举措。     

历史城区不可移动文物消失过程研究——以1978-2014年长沙历史城区不可移动文物消失过程为例

以长沙历史城区不可移动文物作为研究对象,梳理了改革开放以来长沙不可移动文物保护的发展历程,同时归纳出在此背景下,随着城市化进程的发展,长沙不可移动文物消失的阶段性特征与成因,进而指出长沙不可移动文物保护制度本身缺乏约束力与前瞻性的问题,同时提出应抓住目前城市发展方式转向的时间节点,丰富城市设计方法,将不可移动文物保护真正融入到城市功能转型之中。     

长沙港客运新站设计方案

长沙港地处长沙市中山路与沿江大道交汇处,位于湘江一桥下面的湘江之滨,地理位置十分优越。新站沿江岸线350m,泊位数量8-10个,设计客源吞吐量为1～1.5万人/日,候轮室2个,新站房建筑面积3500m~2。 1 总平面规划的布局 总平面设计中我们注重建筑与自然环境的结合,建筑与周围环境的结合,建筑与道路交通的结合。此次总平面设计一并将中山路两侧老城区与长沙港重新进行规划,整体布局考虑以中山路为中轴线,轴线以南为商业中心,以北为居住区及绿化广场,正对着中轴线的为沿江观景台,紧临观景台的为新建长沙港客运新站,与长沙港遥遥相望的为长沙云帆旅行社总部,它与长沙港直接用天桥相连,为出入港人员购物住宿提供了极大的便利,同时在交通组织     

浅谈长沙城市色彩规划

文章通过介绍城市色彩和城市色彩规划的定义与功能,分析了长沙城市的色彩现状,阐述了长沙城市色彩规划的原则和研究思路,并对长沙市城市色彩规划提出了建议。     

布局行业“硅谷”迎接工程机械市场“春天”——访长沙方圆回转支承有限公司总经理廖巨林

位于浏阳现代制造产业园的长沙方圆回转支承有限公司,距长沙市约20公里.近日,本刊记者来到环境优美的长沙方圆回转支承有限公司.在公司新车间,正指挥新设备安装调试的总经理廖巨林先生就长沙方圆的创立过程与发展前景接受了本刊记者的专访.     

火车去哪儿？——如何保护长沙老火车南站

1前言 2014年4月18日,长沙地铁2号线一期通车试运营,长沙进入了地铁时代。市民试乘地铁小学生对车厢充满好奇。其实,火车在长沙奔跑的历史可以追溯到1911年1月27日,当时粤汉铁路的长沙至株洲段竣工不久,就通车运行了,这一跑就是103年。火车,这个代表近现代工业文明的交通工具,在长沙的运营历史竟然要比公共汽车还早23年,而它的发展演变则贯穿了长沙城现代化的全过程。     

浅埋式地下人行通道的通风问题

重点阐述了地下人行通道通风的重要性，并从节能和节约投资的角度分析了地下人行通道采用自然通风的可行性和相应的技术措施。     

Comparison of annual energy performances with different ventilation methods for temperature and humidity control

Stratum ventilation has been proposed to accommodate elevated indoor temperatures recommended by governments in East Asia. TRNSYS is used for computation of the space cooling loads, sensible and latent, as well as system energy consumption. Typical configurations of an office, a classroom and a retail shop in Hong Kong are investigated. Desiccant dehumidification with and without solar assistance is utilized for the air treatment under displacement ventilation and stratum ventilation, while simple reheating is adopted under mixed ventilation. Compared with mixing ventilation and displacement ventilation, stratum ventilation derives its energy saving potential largely from the following five factors: the reduction in ventilation, dehumidification and transmission loads, prolonged free cooling period and increased the COP of the chillers. For the office, the year-round energy saving is found to be substantial at 20% and 40% without the need for solar energy provision when compared with displacement ventilation and mixing ventilation respectively. For the classroom and retail shop, the year-round energy saving is at about 25% and at least 37% with the aid of solar energy provision when compared with displacement ventilation and mixing ventilation respectively.     

Comparison of annual energy performances with different ventilation methods for cooling

Stratum ventilation has been proposed to cope for elevated indoor temperatures recommended by governments in East Asia. TRNSYS is used for computation of the space cooling load and system energy consumption. Typical configurations of an office, a classroom and a retail shop in Hong Kong are investigated. Compared with mixing ventilation and displacement ventilation, stratum ventilation derives its energy saving potential largely from the following three factors: the reduction in ventilation and transmission loads and increased COP of chillers. The year-round energy saving is found to be substantial at 25% and 44% at least when compared with displacement ventilation and mixing ventilation, respectively.     

Meeting residential ventilation standards through dynamic control of ventilation systems

Existing ventilation standards, including American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) Standard 62.2, specify continuous operation of a defined mechanical ventilation system to provide minimum ventilation, with time-based intermittent operation as an option. This requirement ignores several factors and concerns including: other equipment such as household exhaust fans that might incidentally provide ventilation, negative impacts of ventilation when outdoor pollutant levels are high, the importance of minimizing energy use particularly during times of peak electricity demand, and how the energy used to condition air as part of ventilation system operation changes with outdoor conditions. Dynamic control of ventilation systems can provide ventilation equivalent to or better than what is required by standards while minimizing energy costs and can also add value by shifting load during peak times and reducing intake of outdoor air contaminants. This article describes the logic that enables dynamic control of whole-house ventilation systems to meet the intent of ventilation standards and demonstrates the dynamic ventilation system control concept through simulations and field tests of the Residential Integrated Ventilation-Energy Controller (RIVEC).     

利用自然通风技术降低建筑能耗研究

自然通风是一项无能耗的通风技术，利用得当可以解决建筑中的通风和排热等问题，在解决建筑能耗的研究中，利用自然通风是一个很好的选择。通过CFD模拟和实验研究得到了利用自然通风技术降低建筑能耗的方法。经过结果对比，得到了较好的结论，为建筑节能提供了一种思路。     

On the efficiency of night ventilation techniques applied to residential buildings

Climatic change and heat island effect in combination with the non-proper design of buildings have increased substantially the cooling load of buildings. Night ventilation appears to be one of the more promising passive cooling techniques. Many important theoretical and experimental studies have been performed however the existing information is presented in a segmented way. The present paper analyses energy data from two hundred fourteen air conditioned residential buildings using night ventilation techniques. The specific absolute energy contribution of night ventilation has been calculated. The relation of the cooling demand of the buildings with the specific contribution of night ventilation has been investigated. It is found that the higher the cooling demand of the building, the higher the potential contribution of night ventilation under specific boundary conditions. The role of air flow rate is investigated as well. It is found that the global utilisability of the energy stored during the night increases as a function of the air flow rate and the tilt of the regression line between the energy contribution and the air flow rate increases significantly with the air flow rate applied, although the energy contribution per unit of air flow is decreasing. The whole analysis contributes towards a better understanding and evaluation of the expected energy contribution of night cooling techniques.     

不同通风方案对建筑能耗影响的模拟分析

针对济南某办公楼采用如下4种不同自然通风方案后的能耗情况进行模拟分析:①采用空气调节结合自然通风;②加大夜间通风换气次数;③改变通风时段;④改变气候条件。模拟结果表明结合自然通风,全年累计可减少冷负荷58.2%;当夜间通风换气次数增大为1.5 n/h时,综合节能效果最好;选择2:00-7:00时作为通风时段进行自然通风,通风效率最高,能耗费用最低;对于昼夜温差比较大的地区采用自然通风的节能方案最可行。     

基于节能效益评价的自然通风节能潜力研究

以上海市某自然博物馆为研究对象,基于节能效益评价对该博物馆的自然通风节能潜力进行了研究。应用CFD技术对外场风速风向典型工况、不同室外气温条件下建筑内部自然通风除热效果进行了分析,并进一步对不利工况下机械辅助通风的建筑除热降温效果进行研究。结合过渡季节空调部分负荷下的建筑能耗模拟数据,对过渡季节自然通风及带有机械辅助通风的混合通风方式下减少使用空调带来的节能量进行了测算,并通过初投资计算,对混合通风在该博物馆中应用的投资回收期进行了分析。研究表明,混合通风应用于该建筑的累积天数为98 d/a,节能量为132 587 kW.h/a,静态回收期约为3年。     

通风对住宅夏季空调能耗的影响

采用数值模拟方法,对一栋住宅分别位于北京、上海和广州时,不同通风量和不同通风模式下的夏季空调能耗进行了计算分析.结果表明,位于北京时,1.0h-1是最节能的通风换气次数,位于上海时,0.4h-1是最节能的通风换气次数,位于广州时,空调能耗随着换气次数的增加而线性增大,在这三个地区,间歇机械通风都有利于减少空调能耗.     

强化室内通风研究进展

首先解释了自然通风和强化室内通风。接着介绍了强化室内通风的主要结构形式,包括太阳能强化室内通风(太阳能通风墙、太阳能烟囱、太阳墙、太阳能通风屋顶、太阳能蓄能通风)、多元通风和通过改良设计强化室内通风,并对国内外专家和学者的主要研究进展进行阐述。最后指出目前强化室内通风在研究应用的一些不足之处和未来的研究方向。