共查询到20条相似文献,搜索用时 156 毫秒
1.
针对冀中能源总部中央空调系统的基本情况和存在的一些问题,通过实施技术改造方案,从而提高了制冷机与冷负荷的匹配度和制冷机的运转负荷率以及制冷机的能效比,大大降低了制冷机的标称功率和电耗,在节能减排方面产生了很好的经济效益和社会效益。 相似文献
2.
初彦廷 《中国石油和化工标准与质量》2012,32(6):236
根据天津石化炼油部新建装置中央控制室使用中央空调制冷机的使用、维护情况及日常问题的处理,总结出溴化锂制冷机的技术特点、工作原理和检维修方法,通过对数据搜集,得出中央空调制冷机在节能降耗以及环保方面的优点。 相似文献
3.
4.
利用水泥窑余热实现中央空调有多种操作方案,经过各方面的比较,认为利用余热的蒸汽型吸收式制冷机比较合适。常见的余热制冷中央空调系统由制冷机、循环泵、补水泵、分水器、集水器以及末端装置等组成。它能耗低,同电制冷空调相比,运行节电63.5%;技术成熟,安装完毕即可一次投入运行,操作简单、运行稳定且故障率低;还比较环保。 相似文献
5.
《精细化工原料及中间体》2005,(2):52-52
制冷机用溴化锂溶液是国内外广泛使用在中央空调机组中的一种重要的化工产品,近年来随着中央空调机组的普及推广应用,使该产品的用量大幅度增长,国内每年用量在万吨以上。 相似文献
6.
1 概述随着经济建设的发展 ,商用建筑 (写字楼、宾馆饭店、大中型商场等 )大量兴建空调能耗是商业建筑的能耗的主要部分 ,占总能耗的 50 %~ 60 %初步估计目前全国商用中央空调用电量为 40 0万~ 450万kw随着现代化建设的发展 ,能源供应会更加紧张 ,将会导致影响经济的持续发展 ,一般中央空调能耗约占整个建筑总能耗的 50 %左右 ,对于商场和综合大楼可能要高达 60 %以上 ,因此节约商业建筑空调能耗是刻不容缓的。空调系统的能耗主要有两个方面 ,一方面是为了供给空气处理设备冷量和热量的冷热源能耗 ,如压缩式制冷机耗电 ,吸收式制冷机耗蒸… 相似文献
7.
中央空调循环冷冻水处理剂的研究及应用 总被引:1,自引:0,他引:1
作者针对某中央空调循环冷冻水的工况及水质特点,经实验室配方筛选试验,研制出适于该系统的缓蚀处理技术及处理药剂。工业应用表明;该药剂处理技术使得系统中管路的腐蚀得到了控制,制冷机的负荷明显减小,处长了设备的使用寿命,降低了能耗,提高了传热效率,取得了良好的制冷效果,而且处理费用低廉。 相似文献
8.
溴化锂制冷机在烟厂中央空调系统中有着广泛的应用。国标(GB/T18431—2001)对机组冷却水及补水水质提出了一定的要求。该文就补水(自来水)水质不能满足国标要求及冷却水系统保有水量偏小的情况,讨论了水处理的必要性及相应的实施方法。实践表明,水处理工作是成功的,并取得了良好的经济效益。 相似文献
9.
我公司有6台中央空调冷水制冷机,随着使用时间的推移,冷冻水中腐蚀及细菌活动会逐渐形成污垢.污垢附着在冷凝器、风机盘管、控制阀门、过滤器等空调冷端部件上,严重降低了热交换效率.冷凝器必须定期打开端盖通炮,定期加药处理方法的效果也有限,而且会给系统带来化学腐蚀. 相似文献
10.
11.
12.
Christoph Spiegel Manfred Kraut Georg Rabsch Christof Küsters Wolfgang Augustin Stephan Scholl 《化学工程与技术》2019,42(10):2067-2075
The application of highly effective microstructured devices in continuous production and industrial environments is frequently prone to fouling. A new method is presented to characterize fouling in these microstructures. Thermal fouling of aqueous solutions containing whey protein were used as a test system. Different fouling effects could be observed and distinguished. Integral fouling indicators, such as thermal fouling resistance and pressure drop, as conventional criteria for the occurrence of fouling were compared with direct local optical observation. Low thermal fouling resistances could be detected. 相似文献
13.
14.
The MFI-UF, based on cake filtration, was developed to measure and predict the particulate fouling potential of feedwater to membrane filtration installations. The MFI-UF is determined in constant pressure filtration with the flux deceasing during the test. However, many membrane systems, e.g., reverse osmosis (RO), operate at constant flux with pressure increasing when fouling occurs. As both pressure and flux contribute to cake compression, determining the MFI-UF in constant flux with correction to the flux of an RO system is expected to more closely simulate particulate fouling Therefore, this research investigated the development of the MFI-UF test in constant flux filtration applying low (tap water) and high fouling (diluted canal water) feedwater. Preliminary experiments were promising; the fouling index (I) (and hence the MFI-UF) of all feedwater could be determined within 2 h under constant flux filtration. Cake filtration was demonstrated as (1) a minimum in the fouling indexvs time plot and (2) by linearity of the fouling index with feedwater particulate concentration. The fouling index increased with increasing applied flux due to cake compression. Further investigation at higher and lower applied flux is required to identify a reference test flux and to develop a method to correct the fouling index to the reference test flux and/or the flux of a membrane filtration system The fouling index can then be applied in a model to predict fouling. 相似文献
15.
采用污水源热泵供暖空调是节能减排的有效途径,但换热器结垢问题尚未得到有效解决。本文将固液流态化除垢技术应用到污水源热泵换热器的防、除垢中,并设计了一套污水换热器流态化除垢系统。该系统以沙粒作为除垢颗粒,通过理论分析和实验验证相结合的方法,研究了固液流态化除垢的最佳流速、除垢能力、强化换热效果及减少磨损的最佳工作参数。实验结果表明;当换热管内污水流速达到0.87m/s时,直径2~3mm沙粒可流化,沙粒循环回收率达到95%,实现了污水换热器在线清洗;沙粒对壁面的碰撞力可有效去除换热管壁的软垢及铁锈,除垢效果明显;该除垢系统持续运行24h后,污水换热器传热系数提高了25.6%;沙粒体积分数为4%,流速为扬动流速,是减少磨损和保证除垢效率的最佳工作参数。 相似文献
16.
反渗透(RO)/纳滤(NF)膜元件在长期运行过程中会不可避免地发生膜污染,当产水水质无法满足应用指标时,就需要对膜元件进行更换。膜剖检分析是研究和确定膜污染最直观有效的方法,通过膜剖检分析及膜污染诊断可以为膜元件的日常维护、膜系统运行优化和膜性能修复提供有效依据。但是,目前对于膜剖检分析的实践及膜污染诊断研究还不系统、不全面。本文针对RO/NF膜剖检分析及膜污染诊断相关研究,介绍了膜元件剖检分析流程和各类膜污染分析方法,分析了实际应用中存在的问题,并根据膜剖检分析的意义和价值,重点综述了膜污染成分诊断、膜污染分布情况诊断、不同应用场景膜污染情况对比和不同膜材料的污染情况对比研究进展,以期为膜污染机制研究、膜污染预防控制和膜系统运行改善提供参考。 相似文献
17.
研究了循环冷却水及池式沸腾系统中换热面上碳酸钙的结垢行为 ,对垢形进行了分析 .考察了分子自组装膜 (SAM)低能表面循环冷却水系统中碳酸钙结垢诱导期及过诱导期特性 ,研究了污垢的脱除现象 .结果表明 ,在诱导期内进行脱除可减少污垢的发生 ,在诱导期后进行脱除会增加污垢的发生 .扫描电镜 (SEM )表明 ,在阻垢剂存在下 ,循环冷却水系统中形成的碳酸钙垢形发生了变化 .利用扫描电镜与原子力显微镜 (AFM)对池式沸腾系统中生成的碳酸钙形貌进行了研究 ,发现在阻垢剂存在下以方解石为主的垢形变成了以文石和球霰石为主的垢型 ,同时碳酸钙表面的台阶发生了聚并现象 .垢形分维分析表明 ,在阻垢剂存在下两种系统中生成的碳酸钙垢形的分维值都增大了 . 相似文献
18.
阐述了药厂冷却系统中沉积物的类型及产生的原因.介绍了化学清洗的优越性以及化学清洗工艺的实施过程.重点讲述了如何利用水封方法来实现对整个管网的分段清洗的原理和措施. 相似文献
19.
S. Takadono H. Iwahori T. Yabushita Y. Imamura H. Ishizuka S. Tamaru 《Desalination》1984,49(3):347-355
Membrane fouling by suspended solids is a severe problem in reverse osmosis or ultrafiltration of highly fouling feed streams. Tubular membrane systems are inherently fouling resistant and can be automatically mechanically cleaned at regular intervals by a sponge ball cleaning device. The use of this type of system to process a number of highly fouling feed streams difficult to treat by membrane processes is described 相似文献
20.
Zahra Karimi Shoar Hadi Pourpasha Saeed Zeinali Heris Seyed Borhan Mousavi Mousa Mohammadpourfard 《加拿大化工杂志》2023,101(10):5802-5817
At the city gate gas pressure reduction stations (CGSs), to prevent natural gas from forming a hydrate in the throttle valve, the natural gas is heated by the heater before reaching the pressure relief valve. Heat exchangers are an essential component of industrial processes that contribute significantly to total system energy. Since the element impacting heat exchanger performance is the fouling process, all fouling processes and models were dynamically simulated in this study. Through coding in the C++ language and simultaneous use of fluent functions, or, in other words, user-defined function (UDF), fouling-related models were defined for this software. The dynamic simulation was performed, and parameters such as fouling strength and layer thickness were calculated. The effects of changing operating conditions, such as gas inlet velocity, surface temperature, and fouling species concentration on fouling growth, were also evaluated. As the concentration of fouling species increased, the fouling rate also increased. The amount of supersaturation and fouling rate increased as the surface temperature increased. Due to the operational limitations of the system, to reduce the fouling rate, the gas inlet velocity should be as high as possible, and the fluid inlet temperature, surface temperature, and concentration of fouling species should be as low as possible. In this study, the required time to reach the efficiency of 70% of the heat exchanger was calculated using the modelling of this chamber, which was equivalent to 190 days. Additionally, the critical thickness of the fouling layer at this time was 3.5 cm. 相似文献