Research Progress on Hybrid Solar-Geothermal Power Generation

Developing and using combined new energy sources is an important direction of development for new energy in future. The first Hybrid Solar-Geothermal Power station has been built, and related research on this field has been carried out vigorously. Accord

Determination of 1-Hydroxyethylidene-1,1-Diphosphonic Acid in Recycle-Cooling Water by Ion Chromatography

建立了循环冷却水中羟基-1,1-亚乙基二磷酸(HEDP)的离子色谱检测方法。色谱柱为IonPac AS14A阴离子交换柱,流动相为80mmol/L NaOH水溶液,流速1.0mL/min,抑制型电导检测器检测。方法的线性范围为0.25-25mg/L,平均回收率为102%,检出限为0.1mg/L;对0.25mg/L和0.5mg/L的HEDP标准溶液分别进行13次平行测定,相对标准偏差(RSD)分别为4.7%和3.5%。该方法具有简单、快速、灵敏、抗干扰等优点,用于循环冷却水中HEDP的检测,结果令人满意。1-Hydroxyethylidene-1,1-diphosphonic acid(HEDP) is usually used as a scale and corrosion inhibitor in recycle-cooling water for steel industry.The quick and accurate analysis of HEDP concentration in water is of importance to control the inhibitor adding program.However,the common method for HEDP analysis,which determines the total phosphate in water samples,may suffer the serious problem of incorrectly including degraded HEDP as the active HEDP reagent.In this study,the method of the determination of HEDP in recycle-cooling water by ion chromatography was investigated.The chromatographic parameters,including elution and detection,were optimized.The separation was achieved on an IonPac AS14A column with NaOH solution of 80 mmol/L as the eluent at a flow rate of 1.0 mL/min,and the detection was performed by a suppressed conductivity detection mode with the injection volume of 25 μL.The method showed good linearity within the range of 0.25 and 25 mg/L with an average recovery of 102%.The detection limit of the method reached as low as 0.1 mg/L.The relative standard deviations for 0.25 and 0.5 mg/L HEDP standard solutions were 4.7% and 3.5%(n=13),respectively.The method has been applied for the determination of HEDP in recycle-cooling water samples with the advantages of being simple,fast,sensitive,and interference free.上海市科委科研计划项目课题(04-b-02

Layer-by-layer self-assembly preparation and performance of GO-ceramics composite nanofiltration membrane

氧化石墨烯(GO)的片层边缘含有COOH等含氧官能团,因而带负电荷,可以在带正电荷多孔基体上通过层层自组装实现快速沉积。以由3-氨丙基三乙氧基硅; 烷(APTES)修饰的多孔氧化铝管式陶瓷膜为基膜,令GO和聚乙烯亚胺(PEI)以溶液形态在其表面交替沉积实现自组装,继以环氧氯丙烷(ECH)交联; 之,制备新型氧化石墨烯-陶瓷复合纳滤膜。最佳制备工艺是,PEI浓度5 g·L~(-1)、pH=9,NaCl浓度0.3; mol·L~(-1),GO浓度0.6 mg·ml~(-1)、pH=4.5,层数2层,ECH用量6.25 ml·L~(-1),50℃条件下处理70; min。层数为1~4层的自组装膜在0.6 MPa操作压力下对2; g·L~(-1)的MgCl_2的截留率分别为90.16%、93.71%、97.54%、92.93%,其中1层自组装膜的渗透通量为21.92; L·m~(-2)·h~(-1)。氧化石墨烯-陶瓷复合纳滤膜对4种无机盐的截留率大小为MgCl_2>MgSO_4>NaCl>Na_2SO_4,符合; 典型正电荷纳滤膜的特征。Graphene oxide (GO) can be quickly deposited on a positively charged; porous matrix via a layer-by-layer self-assembly strategy because GO; nanosheets contain rich negatively charged, oxygen-containing function; groups, such as COOH. In this paper, the GO-ceramics composite; nanofiltration membrane was prepared via layer-by-layer deposition of GO; solution and eolyethyleneimine (PEI) solution alternately, and then; cross-linked by epoxy chloropropane (ECH) on; 3-aminopropyltriethoxysilane-modified porous Al_2O_3 supports. The; optimum preparation conditions were: PEI 5g·L~(-1), pH=9; NaCl 0.3; mol·L~(-1); GO 0.6 mg·L~(-1), pH=4.5; ECH 6.25 ml·L~(-1) and heat; treatment 50℃/70 min. Under the conditions of 0.6 MPa, when the; self-assembly layer number increased from 1 to 4, the rejection to 2; g·L~(-1) MgCl_2 were 90.16%, 93.71%, 97.54%, and 92.93% respectively,and; the flux of self-assembled monolayer membrane was 21.92 L·m~(-2)·h~(-1).; The rejection orders of inorganic salts of GO-ceramics composite; nanofiltration membrane were as follows: MgCl_2>MgSO_4>NaCl>Na_2SO_4,; therefore they showed the typical positively charged nanofiltration; membrane characteristics

氧化石墨烯/碱式硫酸铝掺杂聚醚砜/聚酰胺复合纳滤膜的制备及其性能

先由氧化石墨烯（GO）、硫酸铝和尿素通过水热法制得氧化石墨烯/碱式硫酸铝（GO-BAS）复合物,继与哌嗪（PIP）溶液共混作为水相;均苯三甲酰氯（TMC）溶于正己烷作为有机相;采用界面聚合法使两相单体在聚醚砜（PES）基膜表面形成聚酰胺（PA）功能层,制得氧化石墨烯/碱式硫酸铝复合物掺杂的聚醚砜/聚酰胺（PES-PA-GO-BAS）复合纳滤平板膜,并在较低的工作压力（0.3 MPa）下对其进行性能研究。其对无机盐溶液的截留率依次为:Na——2SO4（91.08%）>MgSO4（83.42%）>MgCl——2（68.97%）>NaCl（17.62%）;纯水通量可达24.19 L·m-2·h-1,较之聚酰胺纳滤膜提高了近60%,且具备良好的稳定性和耐碱性

粗细粉混用法制备堇青石膜支撑体

将粒径分别为1.5和25μm的堇青石粉体按一定比例球磨混匀,添加适当的粘结剂和造孔剂,经捏合、陈腐、挤出成型及烘坯处理后,程序升温至一定温度烧结2h制备膜支撑体。结果表明,细粉含量20%(质量分数)、1400℃烧结所得的支撑体综合性能较好:纯水通量为10.3m3/(m2·h);爆破压力为2.21MPa。其浸渍于5%(质量分数)NaOH中、置于100℃烘箱36h后,爆破压力仍为1.85MPa,表明其还具有良好的耐碱性能,适合碱性条件下的工业应用

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转变经济发展方式是当前中国的热门话题,而上海在城市发展中又肩负着率先转变的重要任务,在这一意义和背景下,2010年4月24日由上海金融学院学院主办、上海金融学院公共经济管理学院承办的“《中国城市财政发展报告2009/2010:促进‘两个中心’建设的上海城市财政》首发式暨‘经济发展方式转变进程中的财税政策’论坛“在我校举行。与会专家围绕经济发展方式转变进程中的财税政策的“趋势与目标“、“机遇和挑战“、“实施方略“和“地方实践“等四个专题进行研讨,各抒己见,智慧交锋。现将其真知灼见整理摘要与读者分享,以期待更多学者共同关注当前经济发展方式转变进程中的财税政策

单级和两级地热发电系统能量转换分析

地热资源是一种重要的可再生能源,但是中国地质和地热资源复杂。为了更好地利用这种能源,基于热力学基本原理,采用数值计算和模拟,对包括单级闪蒸、双工质循环、两级闪蒸和闪蒸-双工质联合地热发电的单级和两级地热发电系统的主要性能指标进行了对比和分析。结果表明,采用直接冷却方式的单级和两级地热发电系统的各项性能指标均优于间接冷却;两级发电系统的净发电量高于单级闪蒸的净发电量,地热水温度较高时,尽量采用两级发电系统;闪蒸-双工质地热发电系统的最佳闪蒸温度较高,产汽率较低,既有利于减少设备体积,也可以使发电系统处于正压运行,可以提高系统的运行效率

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本文介绍了用于替代锅炉为酒店提供生活热水，同时提供空调用冷冻水的地源热泵系统性能、特点，并与燃油锅炉供热系统的经济性进行了分析比较

太阳能空调系统性能分析

本文对太阳能高效平板集热器与热水型一级溴化锂吸收式制冷机及热水型两级溴化锂吸收式制冷机组成的空调系统进行了计算分析。结果表明，在热水温度为８２－９５℃的范围内，太阳能一级溴化锂吸收式制冷系统具有较高的效率，但系统效率随热源温度的下降而急剧降低；在热源温度为６５－８２℃的范围内，太阳能两级溴化锂吸收式制冷系统具有较突出的优越性，系统效率几乎不随热源温的变化而变化。因此，两级溴化锂吸收式制冷机与太阳能平反集热器有比较好的匹配性能