全球环境基金GEF（简介）

全球环境基金ＧＥＦ（简介）ＧＥＦ是一个金融机构，为发展中国家提供旨在保护全球环境的项目资金（包括赠款和贷款）。所资助的项目包括气候变化、生物多样性、国际水质和臭氧消失。不能从世界银行贷款或从ＵＮＤＰ得到技术援助赠款的国家可以得到ＧＥＦ的资金。ＧＥＦ行...     

福建龙净企业集团福建龙净企业集团公司

福建龙净企业集团福建龙净企业集团公司ＦＵＪＩＡＮＬＯＮＧＫＩＮＧＥＮＴＥＲＰＰＩＳＥＧＲＯＵＰ福建龙净企业集团是经福建省经贸委批准，以福建龙净企业集团公司（原龙岩机械电子工业公司）为核心，以资产为纽带，联合有内在经济技术联系的２２家企业组成的企业法人...     

移动通信系统的EMI／EMC预测和分析

分析了陆地移动通信系统内，外电磁干扰的来源、类型，提出了移动通信系统ＥＭＩ／电磁兼容预测和分析的方法，数学模型和机动实现的程序编制。对一模拟的移动通信系统进行了ＥＭＩ／ＥＭＣ预测和分析，得到的结果合理，验证了此方法及所编程序ＭＣＩＰＡＰ的可行性。     

谈谈淀粉／聚乙烯（PE）降解塑料的前途

在我国，淀粉／ＰＥ降解塑料迄今仍属比较热门的话题。五年来的研究与开发过程中，有成功的喜悦，也有失败的教训。目前，在淀粉／ＰＥ降解塑料的研究与开发方面，存在“勇往直前”和“偃旗息鼓”的两种矛盾的状况。最近，流传着如“淀粉降解塑料国外已淘汰”，“淀粉／Ｐ...     

日本大阪市污水处理设施

日本大阪市污水处理设施吴三江ＳＥＷＡＧＥＴＲＥＡＴＭＥＮＴＦＡＣＩＬＩＴＩＥＳＩＮＯＳＡＫＡ，ＪＡＰＡＮＴｈｅｈｉｓｔｏｒｙａｎｄｄｅｖｅｌｏｐｍｅｎｔｏｆｓｅｗａｇｅｔｒｅａｔｍｅｎｔｉｎＯｓａｋａ，ａｎｉｍｐｏｒｔａｎｔｉｎｄｕｓｔｒｉａｌｃｉｔ...     

聚酯（PET）废塑料分离回收方法

本文对聚酯（ＰＥＴ）废塑料的成分、分离回收方法及成果做了介绍和分析。认为经分离回收的ＰＥＴ是一种具有实用价值、用途广、性能优的塑料原料。     

AAS与ICP－AES间接测定天然水中硫酸盐

本文以与过量形成ＢａＳＯ＿４沉淀反应为基础，较详细地讨论了反应条件、从而拟定了用ＡＡＳ和ＩＣＰ－ＡＥＳ间接测定天然水中的方法、确定了方法的精密度，ＡＡＳ法的ＲＳＤ％为１．５，ＩＣＰ－ＡＥＳ法为３．２．两种方法对比分析的结果接近，误差为１．０％（相对）。用于天然水中的测定，获得满意的结果。     

对壳牌石油公司HSE管理体系的几点认识

通过介绍壳牌石油公司建立 ＨＳＥ管理体系的背景和目标,对照我国行业标准 ＳＹ／Ｔ６２６７—１９９７,分析了该公司ＨＳＥ体系的技术特点,详细地讨论了危害和影响管理过程（ＨＥＭＰ）在ＨＳＥ管理体系中的地位和作用。指出,壳牌公司在废弃物管理中采用的分级政策和记帐政策颇具特色,值得借鉴。     

钻井污水处理的物化工艺研究

对二级化学混凝、Fenton氧化与微孔膜过滤耦合技术工艺处理钻井污水进行了实验研究。首先通过对不同混凝剂的对比实验，确定了最佳混凝剂及试剂最佳投加量，探讨了耦合条件对处理出水COD的去除效果。实验结果表明，采用PAC和PFS的二级混凝、Fenton氧化与微孔膜过滤耦合技术工艺可使钻井污水COD去除率达到95％，其余各项指标亦达标。     

密封材料

密封材料ＳｅａｌｉｎｇＭａｔｅｒｉａｌｓ为了密封需加以保护的和安全的路堤表层与底部，ＡＧＲＵ－ＰＥＨ公司生产ＨＤＰＥ型衬料，此衬料的单面或双面是平滑的和网纹的表面。ＡＧＲＵＳｕｒｅＧｒｉｐ型混凝土防护衬将提供一种高级密封系统，以便解决工程中防酸和下水...     

Environmental life cycle assessment of different types of the municipal wastewater pipeline network

With the onset of social life, humans have considered waste disposal as essential, and they have been able to repel it through brick and clay channels. Checking sewage pipes for energy consumption and a longer lifetime than other sewage system components is important. Climate change and exploitation of industrial resources have made environmental impacts, which are important factors in decision making. The purpose of this study was to introduce the most suitable type of sewage pipe considering environmental protection. Therefore, we applied the environmental life cycle assessment (LCA) method, using Sima Pro 8.2.3 software for the one-kilometer length of concrete pipes (300 mm in diameter), Polyvinyl chloride (PVC), and polyethylene (PE) (315 mm in diameter). Also, the BEES method and sensitivity analysis were used to validate the results. The comparison between three types of municipal wastewater pipes indicated that PE pipes are a more environmentally friendly option than PVC, and concrete pipes in pipe recycling, reducing extraction from untapped resources, and inefficient extraction of resources. Electricity, diesel fuel, and sulfate resistance cement consumption for concrete production are the most pollution elements in the LCA of concrete pipes. Usage of PVC granular, sanitary landfill of PVC pipes, and using hydraulic drill in LCA of PVC pipes are the most elements of generating pollution. The usage of PE granules, PE pipes landfilling, hydraulic excavator, and electricity consumption in the LCA of the PE pipes are the greatest polluting parameters.     

Effect of pipes in heat pump system on electric vehicle energy saving

ABSTRACT

Refrigerant pressure drop and temperature change in pipes are normally ignored in the thermodynamic analysis of traditional vehicle air conditioning system, this will result in serious errors. In this Paper, pressure drop and temperature difference are simulated in different pipes of electric vehicle (EV) heat pump system to analysis the effects of pipes in the actual EV heat pump system. The results indicate that the greater the mass flow, the faster pressure drop increases, the temperature difference decreases. Pressure drop of saturated liquid refrigerant is smaller than that of saturated gas refrigerant at the same saturation pressure and mass flow rate. The higher the refrigerant pressure (no phase change), the slower pressure drop decreases, the faster the temperature difference decreases. Pressure drop decreases with the increment of bending angle of the pipe. For EV heat pump system, suitable valves and less branches are helpful for energy saving of the system. Shortening the pipe between compressor and condenser can reduce temperature change obviously. Pressure drop per unit length in the pipe between evaporator and compressor is large especially in heating mode because of lower refrigerant density. It even reaches to over 100 times of that in the pipe between condenser and throttle valve in heating mode and has negative effects on the performance of the system. If the evaporator is closer to the compressor and the number of branches is less, then pressure drop will decrease a lot, which will be advantageous for energy saving of the heat pump system.     

一种高压油管焊接质量评价方法

阐述了高压油管疲劳破坏的原理及危害,建立高压油管焊接质量评价力学模型,通过有限元分析技术对其许用位移输入进行计算,并结合应变测量技术,利用电动振动台,对高压油管焊接处的疲劳特性进行了试验验证。结果表明,此高压油管焊接质量评价方法是可行的,有限元分析技术和应变测量技术的结合使用,保证了试验的安全性和结果准确性,此外,利用电动振动台进行疲劳耐久试验,操作方便简单,成本相对较低,具有通用性。     

双锥形管接头角度参数对管路密封的影响分析

根据金属密封的基本条件,应用非线形有限元分析软件Msc．Marc,针对联接导管位置不同的两种双锥形管接头密封管路联接结构,计算分析双锥形管接头锥角和锥角差对管路密封性能的影响。计算结果表明,轴向预紧力随锥角或锥角差的增大而增大,密封系统承载内压能力随之下降。     

An Experimental Study of Heat Pipe Performance Using Nanofluids

Heat pipe cooling is widely used in computer processors. Advances in microprocessor technology have resulted in reduced heat transfer surface area. Maintaining an efficient cooling process is therefore challenging. The main goal of this experimental study is to perform a parametric study on heat pipe performance using nanofluids. Nanofluids of 1 and 3 vol% of alumina nanoparticles of 20–50 nm diameters in deionized water versus deionized water as a base fluid were considered in the present study. The nanofluids are prepared in our laboratory using two-step method. The nanofluids thermal properties are measured to confirm the properties enhancement that could indicate a corresponding performance enhancement of the heat pipe. A 10 mm inner diameter, 200 mm long brass tube with 50 mm long evaporator, and 50 mm long water cooled condenser were used. Heat pipe wall temperature is reduced with nanofluids as is the temperature difference between the evaporator and condenser. The thermal diffusivity of the nanofluids is increased by 10%. The pipe pressure in case of deionized water was higher than the corresponding one for the nanofluids by 20–32%.     

浅谈制浆造纸工业水污染处理技术

造纸行业是我国水污染的主要行业。本文分析了我国造纸工业水污染及其治理现状，论述了造纸工业水污染控制对策，提出了造纸工业中中段水采用物化十生化处理、废纸脱墨废水处理采用PE膜处理或气浮＋好氧处理等工艺方法。     

Effect of different design aspects of pipe for earth air tunnel heat exchanger system: A state of art

Earth air tunnel heat exchanger (EATHE) is a promising passive technique to provide thermal comfort condition in buildings. EATHE system uses undisturbed temperature of the ground for heating/cooling of air. Despite the several advantages, this technique has not become much popular owing to its high capital cost (mainly pipe cost and trench excavation cost) and large land area requirements. The primary objective of this study is to present a comprehensive review of different EATHE pipe layouts, pipe properties and positioning of the pipe with their advantages and limitations. It is observed that the ring pipe layout is the most cost-effective pipe-layout for small size EATHE system because it saves excavation cost by using a trench of the existing foundation of the building. However, Grid pipe-layout is an ideal layout for a large size EATHE system. Multi-layer pipe layouts should be used to reduce the land area requirement significantly. Moreover, EATHE system can be installed beneath the building (under building foot-print) to eliminate extra land area requirement for the installation of EATHE system. This review article shows that the Initial capital cost and land area requirement for the EATHE system can be substantially reduced by using appropriate pipe layout. It can be concluded that if EATHE system is installed with proper design strategies, it will be a clean and cost-effective method for building heating/cooling with significant power savings.     

石油储罐机械清淤技术

石油储罐机械清淤的主要目的是利用喷射清洗机等配套设施将清淤介质在一定温度、压力和流量下喷射到待清洗的石油储罐罐体内表面,去除罐体内表面的凝结物和淤渣,并对其进行合理处置,以提高储罐的存储效率,确保储罐安全运行。文章主要介绍了机械清淤设备的工作原理、施工流程及机械清淤的优势,并说明了该技术在大庆油田的应用情况。     

燃煤锅炉低温烟气余热利用探讨

针对燃煤锅炉燃烧产生的低温烟气仍具有一定温度的现象,提出通过增设超导热管空气预热器对这部分低温烟气余热加以回收的设想,对锅炉送风进行预热,探讨烟气余热利用可达到的送风温度、节能效果及可能产生的经济效益。     

武陵源风景名胜区生态环境建设现状及对策

风景名胜区的开发存在的主要问题是:有限的资源面临着旅游市场迅速扩张的巨大压力;而重复建设和盲目粗放式开发更加重了资源供需失衡.正确处理自然生态资源的保护与开发的关系就成为风景区可持续发展的基础.本文试就这些问题,以武陵源风景名胜区的生态环境建设为例来探讨旅游资源的合理开发、保护和利用的正确途径.