Wind energy and natural ventilation potential of a wind catcher in Yazd – Iran (a long-term measurement)

When designing energy efficient buildings it is useful to study existing climate—responsive building typologies. The wind towers or wind-catchers of Yazd city in Iran are typical examples of such a typology. Although many previous studies have investigated the performance of various types of wind catcher systems, studies based on a long-term real-life measurement can be rarely found. In this study a long-term whole year monitoring campaign on an existing full scale four sided wind catcher in Yazd was carried out in 2014–2015. Three prevailing wind directions were identified and the measured on-site wind speeds were used to estimate the wind induced natural ventilation potential of the tower. A shaft/tower airflow performance index was developed. The monitoring results were compared to the ASHRAE Standard 62:2001 ventilation rate requirement. Results show that the total ventilation rate of the wind tower surpasses the ASHRAE Standard requirements. Furthermore it shows that the shafts are exposed to the prevailing wind directions perform better. For more effective natural ventilation a wind tower with adaptable openings/shafts are proposed.     

Advanced oxidation treatment of physico-chemically pre-treated olive mill industry effluent

In this study, the applicability of physico-chemical methods was investigated for the pre-treatment of the olive mill effluents prior to the discharge into the common sewerage ending with a municipal wastewater treatment plant. The samples were taken from an olive oil industry operated as three-phase process located in Turkey. Various pre-treatment methods including acid craking, polyelectrolyte and lime additions were applied. Advanced oxidation study using Fenton's process was also investigated following pre-treatment by acid cracking and cationic polyelectrolyte. Acid cracking alone gave satisfactory treatment efficiencies and polyelectrolite additions to the acid-cracked samples enhanced treatment efficiency. Since a complete treatment plant is available at the end of the sewer system, results indicated that the effluents of the investigated industry could be discharged into the municipal sewerage in the case of total chemical oxygen demand (COD_tot), suspended solid (SS) and volatile suspended solid (VSS) concentrations according to the Turkish Water Pollution Control Regulation after pre-treatment with 5 ppm anionic polyelectrolyte following acid cracking. The minimum COD_tot, SS and VSS removals were observed when raw wastewater was pre-treated with lime and the discharge standards to the municipal sewer system could not be met. Advanced oxidation with Fenton's process was applied after acid cracking and cationic polyelectrolyte treatment in order to investigate further reduction in chemical oxygen demand (COD) concentration for minimizing the influence of this industrial discharge on the existing municipal wastewater treatment plant. Results indicated that COD_tot removal increased up to 89% from 74% after Fenton's oxidation for the acid cracked samples in which cationic polyelectrolite (10 ppm) was added.     

热盐腐蚀环境对TC11钛合金高温寿命影响规律试验研究

目的 针对发动机钛合金部件在热盐环境与工作载荷下的寿命衰减问题，开展TC11钛合金热盐腐蚀疲劳与应力腐蚀试验，研究腐蚀环境下TC11的高温寿命衰减规律与失效机理。方法 利用喷盐法制备TC11钛合金试验件，研究不同温度与应力水平对TC11腐蚀疲劳以及应力腐蚀的影响规律。利用SEM等观测手段，开展腐蚀疲劳以及应力腐蚀试样断口与表面的形貌分析，分析腐蚀环境下的失效机理。结果 热盐腐蚀环境导致TC11的寿命显著降低，对比450 ℃下无腐蚀寿命，腐蚀疲劳寿命下降了2个数量级，应力腐蚀寿命下降到不足1%，且分散性较大。观察腐蚀疲劳和应力腐蚀的试样可以发现，表面有明显的腐蚀坑，腐蚀坑底发现裂纹。结论 热盐环境下，TC11腐蚀疲劳寿命和应力腐蚀寿命都会明显下降。由于腐蚀导致钛合金试样表面产生许多腐蚀坑，在腐蚀坑局部形成近似缺口，缺口部位的应力集中是导致腐蚀疲劳寿命衰减的重要因素。腐蚀疲劳的寿命低于Kt=1的无腐蚀疲劳寿命，但是要大于Kt=3的无腐蚀疲劳寿命。     

裂解气脱硫新趋势

在回顾现有裂解气脱硫工艺的基础上，介绍了近年来国内外在该领域的研究和应用中所取得的进展及未来的发展趋势。     

我国温泉旅游资源的开发与利用

我国温泉旅游资源丰富,目前已经形成了一批成熟的温泉旅游度假区,但是当前我国对温泉旅游资源的稀缺性和脆弱性认识不足,温泉旅游项目建设存在贵族化、劣势产品"搭便车"趋向、旅游功能单一等问题.提出充分重视温泉旅游资源的价值,根据市场状况合理选择开发模式,对本地洗浴客人和外来公务游客作重点营销,保持温泉旅游产品的价格优势,开发多元化旅游产品.     

废聚苯乙烯的化学回收方法

废聚乙烯（ＰＳ）转化为燃料油和化学品的化学回收方法,分为废ＰＳ单独裂解及废ＰＳ与其它废塑料混合裂解两种方式,分别阐述了两种回收方式的研究成果和工艺现状,并就存在的问题进行了讨论。     

辽宁酷热日的天气气候分析

利用统计方法对辽宁1951-2003年的酷热天气进行了分析,发现辽宁的酷热天气主要出现在辽西地区;酷热天气在5-7月均可出现,主要集中在7月;无明显的年际变化.中纬度东-西高压带是造成辽宁酷热天气的主要天气形势;其次是西风带暖高压,在850hPa温度场上,辽宁西部在24℃暖中心之内有很好的指示意义.     

中压加氢裂化装置危险和可操作性研究

针对中压加氢裂化生产过程存在很大的火灾、爆炸、毒害等危险性的特点，以加氢裂化反应器出口至冷高压分离器进口之间管线为分析节点，对工艺参数流量可能发生的各种偏差进行了危险和可操作性研究，找出了偏差发生的原因及可能导致的后果，提出了相应的控制措施，对提高装置的安全可靠性，预防和减少事故发生具有重要作用。     

静风环境热重气体行为模式分析

热重气体是指从容器、管道、钻井等喷出时的温度比大气环境温度高、标准状况下密度比空气密度大的气体.有毒热重气体沉降到地面会对人和动植物造成危害.本文根据能量守恒定律和气体状态方程,建立了静风环境热重气体行为模式判别式,计算分析了喷出气体温度不同、有毒热重气体含量不同时的有毒热重气体行为模式.计算结果分析表明,随着喷出气体温度的升高,空气与有毒热重气体混合物中有毒热重气体开始沉降的浓度下降.