商业建筑暖通空调设计分析

随着经济发展和人民生活水平的提高,我国商业建筑也大量兴建,而且对于商业建筑的使用舒适性要求也越来越高。中央空调已在越来越多的商业建筑中使用,而且在建筑能耗中占很大的比例,所以设计的合理性非常重要。本文主要针对商业建筑空调通风设计中的常见问题及设计要点进行分析总结。     

商业建筑中的空调和照明节能

商业建筑中空调和照明的能耗占总能耗的75%～80%,并具有很大的节能潜力,从控制空调冷热源、风机、水泵及照明等方面的能耗进行阐述,为现在商业建筑中的节能提供参考。     

上海某冰雪世界制冷空调系统运行能耗分析

以上海某冰雪世界为研究对象,根据调研类似建筑及对该项目制冷空调系统的研究、分析,估算出了戏雪馆、滑冰场及餐饮娱乐配套设施各部分的空调系统能耗;与一般的商业建筑空调的能耗水平进行了比较,并提出了相关的节能措施。     

大型商业建筑通风空调设计

通风空调涉及较大规模的商业建筑提供一个舒畅的内部环境,但是针对大规模商业建筑空调通风的设计,成为企业自身急需去解决的问题。     

济南市某商业写字楼空调冷源方案分析

针对济南市某商业写字楼实际空调工程,根据建筑物功能及负荷特点,在确定该建筑空调冷负荷的基础上对多联机及冰蓄冷两种空调方案进行选型,对两空调方案各自的初投资及运行费用进行对比分析,结果表明,本建筑多联机空调初投资、运行费用均低于冰蓄冷方案,最终确定该建筑物优先采用多联机空调方案。     

论高级商业建筑暖通空调优化设计方法

本文阐述了现代商业建筑的设计原则、参数及冷热负荷取值、空调方式及冷热源设备的选择与布置、水系统的设置、节能保温、空调防火与排烟安全设计等实用技术问题。并着重指出按商业建筑使用功能、地区及要求等因素选择冷热负荷指标与各项设计参数，是做好工程设计的重要途径。     

西安中贸广场中央空调方案设计探讨及节能分析

本文从大型商业中央空调的方案设计出发,通过对中央空调冷热源、水系统、风系统及空调自控系统的设计理念阐述及运行节能特点分析,以期望在提高中央空调设计质量,降低大型商业建筑空调能耗方面有所帮助。     

商业建筑室内空气洁净标准的探讨及过滤器的选择

指出商业建筑室内空气洁净标准存在的问题 ,并给出建议值。分析了目前过滤器生产厂家提供性能参数不足之处 ,给出应该提供的性能参数 ,通过一个实例给出商业建筑空调系统过滤器设计选用方法并指出过滤器选择不同对空调系统的运行调节的影响     

大商集团沈阳新玛特休闲广场空调设计

大商集团沈阳新玛特休闲广场是集商业、餐饮、健身、电影院、宠物店、文化会所及员工培训中心为一体的综合性建筑.本文介绍了该工程的负荷计算、空调方式、集中空调水系统、防排烟、冷热源及空调自控系统.     

某商业综合体空调系统分析与节能设计的探讨

商业综合体功能业态多样化、空调能耗占比较大、集中空调设备初投资高。在建筑能耗上,空调、通风和防排烟系统的合理制定起到了不可忽视的作用。本文从冷热源选择、空调系统、节能设计以及防排烟和通风系统等方面对佛山某商业综合体新建项目进行介绍,为其他综合体建筑的设计提供参考。     

热交换器的分类及优缺点分析

热交换器是将不同温度介质之间的热量通过热传导的形式,由高温介质传递给低温介质,使介质达到生产所需温度的工艺设备,也可作为一种节能设备使用.通过对不同热交换器的结构分析,总结不同热交换器的优缺点、适用环境,为生产工艺设计人员及设备制造单位在选择可降低能耗、提高效率的设备上提供参考.     

聚苯胺及其复合物的制备和结构及形貌分析

通过化学氧化法分别制备盐酸,盐酸和十二烷基苯磺酸,碳纳米管(MWNTs-COOH)掺杂的聚苯胺,利用红外光谱,紫外光谱,扫描电子显微镜和透射电子显微镜对所制备聚苯胺的结构和形貌进行分析。分析不同掺杂物对聚苯胺的结构和形貌的影响;同时研究了超声波作用对聚苯胺形貌以及聚苯胺包裹MWNTs-COOH情况的影响。     

Thermodynamic similarity and prediction of the properties and characteristics of substances and processes

Principles of the theory of thermodynamic similarity are considered in application to all aggregate states of a substance, including phase transitions, and to the change in dissipative structures in open systems.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 53, No. 5, pp. 709–716, November, 1987.     

Modelling and computation of curing and damage of thermosets

The curing of thermosets is a complex process involving the transition from a fluid into a (visco-) elastic solid. This phase transition comes along with an increase in stiffness and a volume shrinkage of the polymer. The latter may lead to severe residual strains and stresses, which in turn can cause damage in the final, usually quasi-brittle material. In this contribution a constitutive model is developed which takes into account the curing of a thermosetting material together with the process-induced damage as resulting from curing shrinkage. The curing of the material is governed by a phenomenological hypoelastic constitutive equation which includes temporal evolutions for stiffness and volume shrinkage. Thermal and viscous effects are neglected in the present study. An isotropic gradient-enhanced damage model is adapted to describe the damage evolution. The curing-damage model is implemented into a finite element code and numerical examples for thermosetting materials demonstrate that the proposed model is capable to predict cure-induced damage in thermosets.     

Mechanisms of Corosion and Oxidation of Metals and Alloys

Selected topics in field of the study of the mechanisms of corrosion and of oxidation of metals or alloys are presented. The first part reports a new model for the mechanism of the breakaway oxidation of ferritic stainless steels in water vapour. The second part is devoted to the physico‐chemical aspects of oxidation and presents experimental methods useful in the kinetic modelling applied to two alloys, the zircalloy‐4 and an AlMg5 % in the liquid state. In the third part the physical and numerical modelling of the stress corrosion cracking behaviour in face‐centered cubic (fcc) alloys is detailed, which enables the study of the influence of macroscopic parameters (such as the temperature or hydrogen activity) on the fracture process.     

碳化硼陶瓷增韧补强和致密化研究现状及其展望

碳化硼陶瓷具有极高的硬度,然而其低韧性、低抗弯强度、难以致密化限制了它的广泛应用.已有一些研究集中于碳化硼陶瓷增韧补强和致密化,对这一方面国内外研究进展进行了归纳与评述,阐明各种增韧补强和致密化方法的优缺点,提出碳化硼陶瓷增韧补强和致密化研究值得发展的一些方向.     

Measurement and analysis of elastic and anelastic properties of alumina and silicon carbide

Measurements of dynamic Young's modulus, E, and damping as a function of temperature, T, were made for alumina and silicon carbide. The Young's modulus data were compared with some from the literature, and analysed in terms of a theoretical framework relating the Debye temperature, θD, with the elastic constants. For both materials this analysis yielded a ratio T₀/θ_D which was near 0.4, where T₀ is an empirical fitting constant for the plot of (E(0)−E)/T versus 1/T (E(0) is the value of E at 0 K). The analysis of the damping data in terms of an Arrhenius type dependence led to effective activation energies near kT, where k is Boltzmann's constant. This revised version was published online in November 2006 with corrections to the Cover Date.     

Preparation and characterization of phosphate and arsenate apatites of strontium and their solid solutions

Samples of phosphate and arsenate apatites of strontium and six of their solid solutions, spread over the entire compositional range, were prepared by a wet method. They were characterized by chemical, X-ray, electron microscopic and infrared analyses. The validity of Vegard's law established the homogeneity of the solid solutions.     

检定和校准证书的异同与应用

本文介绍了检定和校准以及证书的两点相同、五点不同之处,说明了对检定证书和校准证书的正确应用。