珠钢集中空调几个问题的剖析

建江钢厂集中空调出现的冷却塔选用、水泵过载、冷冻水及冷却水系统的水力稳定性等问题进行分析探讨,提出相应的解决办法,并提出过渡季节或冬季冷水机组经济运行的冷凝器进水温度和节能新措施 。     

空调冷冻水系统控制

本文通过某大厦空调冷冻水系统的控制介绍，表明只有在空调设计人员提供了准确的控制、测量参数的基础上，才能实现冷水机组自动控制的目的，满足空调的设计要求。     

关于客房排气的热回收系统

阐述热回收系统节能的重要性，分析热回收装置的特点，通过实例的剖析，强调系统配置的合理性，指出建筑与空调的节能措施要统一。     

热回收焦炉烟气阀门设计

热回收焦炉配套的烟气余热发电系统管路上安装有大量的烟气闸阀,该阀在使用中对高温烟气起切断或流量控制作用。由于焦炉烟气温度很高、工况恶劣,目前的阀门普遍存在阀板易断裂、使用寿命短等问题。该问题已严重的影响了整个焦炉系统的运行效率和生产产出,是令热回收焦炉行业头疼的问题之一。本文提出了一种水冷型烟气闸阀,并就该阀门的工作原理及理论计算进行了较为详细的介绍;该新型阀门解决了现有阀门存在的阀板易断裂等问题,解决了困扰行业的难题。     

氧化铝焙烧炉烟气余热利用探讨

气态悬浮焙烧炉存在着热量利用率低、排放烟气温度过高等问题,烟气余热具有很大的利用价值。通过增加热交换系统,利用热管式换热器将烟气中的高品位余热进行回收,降低烟气温度,回收烟气显热,用于加热平盘洗水。既减少了新蒸汽的消耗,又减少了温室气体CO2排放量,相当于年节约标准煤1822t,年经济效益138万元。     

蓄热均温技术在电炉烟气治理及余热利用中的应用分析

电炉高温烟气由于温度波动剧烈，含尘量大，目前显热回收技术受到一定的约束。蓄热均温技术可以有效缓解烟气温度波动，优化电炉烟气治理工艺，改善余热回收条件。     

小资料

正空调冰箱用冷凝器、蒸发器(简称"两器")统称为热交换器,也称换热器,是空调和冰箱的"呼吸系统"。蒸发器的作用是使制冷剂液体气化蒸发,从外界吸收能量;而冷凝器是向外散热,使制冷剂气华降温液化。     

不同热冲击过程花岗岩I型和Ⅱ型断裂特性研究

在岩石工程中发生的与高温相关的灾害中,快速降温的影响（热冲击）不可忽视,因此,研究在不同程度的热冲击作用下花岗岩的断裂特性可以对遭受高温灾害后岩石工程的稳定性分析提供理论依据和技术支撑。在本研究中,花岗岩被加热至目标温度（200 ℃、400 ℃、600 ℃）,利用制冷剂的不同温度（-20 ℃、20 ℃、60 ℃） 为高温试样提供不同速率的降温处理。热处理前后对试样干密度、孔隙率和纵波波速进行测定,并通过巴西劈裂试验测试试样Ⅰ型、Ⅱ型断裂韧度。试验结果表明：干密度、纵波波速以及Ⅰ型、Ⅱ型断裂韧度均随降温速率的增大而减小,孔隙率则随降温速率的增大而增大;快速冷却引发的拉应力是造成花岗岩损伤的主要原因,且与岩石试样和制冷剂之间的温差呈正相关。     

30HK115型冷水机组氟系统进水事故的处理

１前言八一钢铁集团有限责任公司制氧分厂６０００m３／h制氧机配置了３台中美合资上海合众－开利公司生产的３０HK１１５型冷水机组。１９９７年开始投运后，各工况参数一直正常，出力效率良好。但在２００２年年初，其１＃机组频繁出现缺氟利昂现象，同年４月又发生了氟系统进水的较大事故，这种事故较为少见。２工作原理及性能参数２．１工作原理３０HK１１５型冷水机组的工作原理如图１。该冷水机组用氟利昂R２２（二氟乙氯甲烷，分子式：CHF２Cl）作为冷媒介质。蒸发器低压的气态R２２通过压缩机压缩升压，之后进入冷凝器被冷凝成…     

南昌华南城一期市场空调通风设计

介绍了1、2号交易广场空调冷热源、空调风系统、空调水系统、空调通风自控、通风系统及防排烟系统的设计,并对设计进行了小结,1、2号交易广场分为两个独立的空调系统,空调冷热源均为水冷离心式冷水机组加真空热水机组。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.