冷凝水回收再利用

现代化技术设备的不断更新,纺织厂空调耗能比重逐年上升,因此认真地研究和解空调节能问题是摆在我们面前的一项刻不容缓的重要任务,而目前许多大型企业所配置的空调系统大多是集中式的全空气处理系统,夏季的降温、去湿处理过程主要靠表冷器来完成高温、高湿的空气与表冷器进行热湿交换后,大量的冷凝水被析出,而这些冷凝水的温度又较低,把这些温度较低的冷凝水回收起来再利用,对空调夏季的节能将会有重要的作用。本文介绍了集中式全空气处理系统空调目前产生冷凝水的现状,冷凝水量的计算方法,及冷凝水的回收再利用。     

利用余热改造区域采暖系统

工业余热是指各种生产工艺过程的热损失,我厂的工业余热主要有：从各种化工设备,工业炉中排出的可燃气体;高温烟气及熔渣;从工业炉或其它设备排出的冷却水;工业设备中蒸发出的蒸汽或动力设备中排出的乏汽。2140冷凝水站改造前情况140冷凝水站是加收全厂冷凝水的总站。总站回收能力可达170t／h。目前实际冷凝水回收,夏季为40－50t／h,冬季可达60－80t／h,冷凝水回收温度一般为85－95℃。可供回收热量为14X10KW。改造前冷凝水由于含油,不能被电厂回收利用,冷凝水被送到11单元,12单元加热原油,又因为冷凝水的量过大,一部分冷凝…     

浅谈粒碱蒸发冷凝水回收利用

阐述了天辰化工有限公司粒碱系统蒸发冷凝水的回收再利用工艺改造内容,结合现场实际情况对剩余蒸发冷凝水进行处理,实现了粒碱系统蒸汽冷凝水的回收再利用,解决了水不能回收和处理的难题,同时为企业节约了水资源,降低了运行成本。     

固碱生产过程中二次蒸汽冷凝水的回收利用

受新疆地域的影响和液体产品运输工具的限制,液碱产品运输到内地销售成本过高,不利于企业的生产成本控制。天能化工有限责任公司将生产出来的32%液碱蒸发干燥成98%固碱产品,便于运输。在液碱蒸发过程中产生大量的二次蒸汽冷凝水,显碱性且温度高。为了实现二次蒸汽冷凝水的回收利用、环保、节能减排,天能化工有限公司通过工艺技术改造实现了二次蒸汽冷凝水的零排放,解决了含碱水化盐富余、生产直排给企业水处理的困难,节约了水资源,降低了企业的生产成本。     

无动力回收冷凝水提高分体空调机性能的实验

家用空调的使用越来越广泛,在湿热环境,空调产生的冷凝水量相当可观.本文利用冷凝水含有可回收冷量的特点,将其用于降低室外机进风温度来提高室外机的散热性能;通过对比分析冷凝水冷却室外机进风前后的空调机性能,提出一种用冷凝水浸湿的湿帘冷却室外机进风的方案,并设计了一套无动力输入的集冷凝水回收与利用于一体的节能系统,并做了初步实验验证,结果显示在室外温度升高0.02%时,室外机进风湿帘可以小幅度拓展室外机工作温度范围,还有空调COP提高了2.6%.既解决了现实中冷凝水的随意排放造成的环境问题,又提高了空调机的空调效果,是一种很好的节能环保技术.     

粒碱系统蒸汽冷凝水回收再利用的工艺改造

介绍了天辰化工有限公司粒碱系统的蒸汽冷凝水的回收再利用的工艺改造内容,通过改造,实现了粒碱系统蒸汽冷凝水的回收再利用,解决了水不能回收和处理水中的难题,同时为企业节约了水资源,降低了运行成本。     

商场冷凝水耦合光伏/光热系统的应用分析

太阳能光伏光热(solar photovoltaic-thermal, PV/T)技术将光伏和光热结合,可实现产电效率的提高和低品位热源的综合利用。基于商场空调冷凝水的实时回收量,本文研究建立了冷凝水水冷式PV/T系统,研究了该系统的性能和环境效益。在确定商场的空调冷凝水的逐时水量的基础上,将冷凝水水冷式PV/T系统与单一光伏(photovoltaic, PV)系统的性能进行对比分析。结果表明,冷凝水水冷式PV/T系统通过收集制冷季商场内空调产生的大量冷凝水作为冷却介质,降低了光伏电池板的温度,典型日的光伏效率提升了17.78%,在整个制冷季,冷凝水水冷式PV/T系统较单一的PV系统净发电量增加了365.55 kW·h,具有6 938.27 kW·h的节能效益,可减排6.439 t二氧化碳。     

有固相析出的多效两段蒸发 系统模型与过程模拟

建立了带有冷凝水闪蒸的有固相析出的多效两段蒸发系统的常规设计数学模型,模型将系统的相平衡关系用回归式表达,使模型可以用计算机编程求解,避免了手工计算结合查相图的烦琐的计算过程;利用矩阵方程具有结构清晰和高度模块化的特点,将系统的物料衡算和热量衡算方程组写成矩阵方程的形式,只要保留或舍弃矩阵方程中的相关块矩阵,模型就能代表没有冷凝水闪蒸或没有固相析出的多效两段蒸发系统常规设计模型;采用迭代法结合矩阵法来求解模型,算例表明,冷凝水闪蒸对多效两段蒸发系统是有效的节能措施,算法收敛速度快、收敛稳定性好。     

解析蒸汽冷凝水的回收利用

介绍了天辰化工有限公司始终将节能环保放在首位,通过不断的技术改造将解析蒸汽冷凝水回收利用,解决了解析蒸汽冷凝水不能回收利用的难题,减少废水排放节约成本获得可观的经济效益。     

蒸汽冷凝水热量回收系统的设计计算

阐述二次蒸汽冷凝水热量回收系统的设计计算，建立冷凝汽液相转换的计算方程、研究喷射器在冷凝装置和冷凝水回收泵之间所起的耦合作用，建立喷射器的流体连续性方程、热平衡方程和效率计算的公式，指出克服冷凝后过热水再转变为汽相的技术关键；还导出流体在循环回路及经过泵加压后的能量方程，最后给出应用实例的示意图并讨论回收系统的设计计算应解决的技术性问题     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to