Comparison Between Heat Pipe and Direct Heat Exchange Solar Louvre Collectors

International concern about the environmental implications of climate change coupled with increasing demand for energy to fuel modern society has lead to growing interest in using renewable energy sources as alternatives to conventional sources. The work presented in this paper compares two types of solar collector integrated into louvred shading devices. In addition to protecting glazed spaces in buildings from excessive solar gain, the collector would provide the flexibility to produce systems customized for collecting heat over a temperature-range appropriate to particular building services applications at various climates/locations. This would allow considerable savings to be made in primary energy consumption and lead to a reduction in global warming impact. Two solar absorbers, based on different techniques of heat exchange, were tested experimentally. The first was based on a direct heat exchange technique, and the second used heat pipe technology. Various comparisons were made and it was concluded that the heat pipe solar louvre collector was the preferred device.     

异波折板水解酸化-A2O一体化反应器实验研究

设计了异波折板水解酸化-A2O一体化反应器,进行生活污水处理的实验研究。10个月的实验结果表明,系统的最佳水力停留时间（HRT）为8 h时,最适COD进水浓度为240-100mg/L,最佳混合液回流比（r）-污泥回流比（R）为250%-100%。控制反应器于以上运行参数下,25±2℃所对应的COD、TN和TP去除率分别为96.84%、67.55%和81.92%。当温度降至7℃时,其COD、TP和TN分别降至86.35%、50.25%和65.68%。基于实验分析结果,阐明了一体化反应器高效性的机理在于异波折板水解酸化段具有高效传质特性和A2O段具有复合式活性污泥-接触氧化好氧池的特点。     

采煤沉陷区输电铁塔复合防护板基础抗变形性能及其板厚取值研究

以某采煤沉陷区内的典型输电铁塔及其复合防护板基础工程为背景,考虑地基-基础-上部铁塔结构的共同作用,对不同板厚复合防护板基础的抗采动变形性能进行了研究,并引入"保护作用"的概念,对独立基础和复合防护板基础的抗变形性能进行了分析。研究表明,设置复合防护板后,与独立基础相比,可明显减少铁塔支座的水平位移及上部结构的应力,支座位移与结构应力随着复合大板厚度的增大而减小,其减小的幅度随着板厚的增大而趋缓,当板厚达到一定数值以后几乎不再减小。提出的复合防护板的厚度可取铁塔基础长向根开的1/45～1/35的建议,以供采煤沉陷区内复合防护板基础的设计参考。     

多孔孔板水力空化反应器的水力特性

设计不同孔分布的孔板空化反应器,通过测定空化数及.OH产生量,研究多孔孔板水力空化反应器空化特性,为高性能多孔孔板水力空化反应器的设计奠定基础。实验结果表明,空化数随孔板孔径的增加、入口压力的减小和溶液温度的升高而增大;.OH产生量随孔板孔径的减小和运行时间的增加而增加,随入口压力和溶液温度的升高先增加后减小。结果表明,多孔孔板水力空化反应器的水力空化效果与孔板结构及操作条件有关。     

Studies on the residues of phosalone on chilli by GLC after multiband plate cleanup

Abstract

Four sprays of 0.05 ana 0.10% phosalone were given on chilli (Capsicum annuum Linn.) crop at an interval of 15 days starting from 21 days after transplanting. Residues were determined in the green chilli fruits by GLC after cleanup of extract on multiband thin‐layer plate. The half‐lives of residues were 1.55 and 1.68 days on chilli fruits from the crop treated with four sprays of 0.05 and 0.10% phosalone respectively. The time required to reach the tolerance limit of 1 ppm after last spray with 0.05 and 0.10 % emulsion was 4.75 and 7.62 days respectively. Washing of fruits under tap water was found effective in bringing down the level of phosalone residues by 21.64 to 75.11 %.     

印刷用铝基材碱洗废液的循环利用

对印刷用铝基材碱洗废液进行了循环利用研究。首先将高COD含量的碱洗废液进行除油脱色处理,通过石灰和硬脂酸的协同效应,使COD含量从26300mg／L降至480mg／L,色度降至60°;然后利用含铝碱性废液通过碳化法制备出结晶度66％的拟薄水铝石产品;最后对分离后的碱性废水按配方要求配制,对铝基材进行除油实验,经5次循环表明,除油效果和对铝基材的腐蚀率均100％达标。     

Particulates and Metallic Elements Monitoring at Two Sampling Sites (Harbor,Airport) in Taiwan

This study characterized the dry deposition flux and dry deposition velocity (Vd) of metallic elements attached on particulate matter. Specifically, large particles (>10 μm), coarse particles (10 μm～2.5 μm), and fine particles (<2.5 μm) were studied at the Gong Ming Junior High School (Taichung Airport) and Taichung Harbor sampling sites in central Taiwan. Ambient air samples were collected to determine total suspended particulate matter (TSP), dry deposition plate (DDP), Vd, coarse particulate matter (PM_2.5–10) and fine particulate matter (PM_2.5), and metallic elements concentrations at the Airport and Taichung Harbor sites between June 17, 2013, and November 14, 2013. The results revealed that the average TSP, DDP, Vd, PM_2.5–10, and PM_2.5 particulate at the Airport were 54.55 (μg/m³), 902.25 (μg/m²-min), 17.11 (m/sec), 0.003 (μg/m³), and 0.010 (μg/m³), respectively; while these values at Taichung Harbor were 63.66 (μg/m³), 539.69 (μg/m²-min), 9.94 (m/sec), 0.003 (μg/m³), and 0.014 (μg/m³), respectively. In addition, the results showed that the average Cu and Pb concentrations were higher than Cr, Ni, and Cd for both the airport and harbor sampling sites. Furthermore, Cr, N, Cu, Cd, and Pb had the highest average concentrations versus those reported for other study areas, with one exception: The results obtained in Kacanik, Kosovo, during 2005. The average metallic elements concentrations order was Cu > Pb > Cr > Ni > Cd.     

提高氧化亚铁硫杆菌和氧化硫硫杆菌平板检出率的方法:双层平板法

用2％的水琼脂作底层平板，上面涂布异养菌（酵母1130）菌液，再倒入分离硫杆菌的固体培养基作上层平板，涂布一定稀释度的含硫杆菌的菌悬液，30℃下倒置培养．结果显示，氧化硫硫杆菌菌落在双层平板上检出的时间比单层平板提早5d，检出率提高3．6倍，氧化亚铁硫杆菌菌落在双层平板上，检出率提高2．1倍．琼脂经高压灭菌后产生较高浓度的对化能自养菌有毒的水溶性有机物可能是影响单层平板检出率的重要原因，而双层平板下层的异养菌因能消耗上层的水溶性有机物从而可大幅度提高硫杆菌的检出效率．     

冷轧薄板摩擦热及温升模型研究

冷轧时轧件塑性变形热和摩擦热是导致轧件温度升高的两个主要原因。采用包含滑动摩擦和粘着摩擦在内的预位移 滑动摩擦模型较准确地计算了轧制区摩擦热 ,并综合考虑轧件塑性变形热 ,推导了冷轧薄板温升计算公式。     

逆王水电热板方法消解水和废水中的银

以感光行业废水、电镀工业废水为实验对象,优化了逆王水电热板消解银的回流时间和逆王水用量,建立了逆王水消解水质银的电热板消解方法。并对地下水、生活污水、电镀工业废水、感光行业废水开展加标回收实验。结果表明：采用逆王水消解,当消解液温度控制在80～95℃,回流时间为2 h,逆王水用量为3 mL HNO₃+1 mL HCl时,消解电镀工业废水、感光行业废水、生活污水及地下水中银的加标回收率为85.0%～115%,相对标准偏差为2.9%～6.4%。将该方法与《水质银的测定火焰原子吸收分光光度法》(GB 11907—1989)前处理方法开展比对,2种方法消解结果无显著差异。表明逆王水电热板消解方法可以用于水和废水中银火焰原子吸收分光光度法测定的前处理。