共查询到20条相似文献,搜索用时 109 毫秒
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本文分析了国内空调用制冷压缩机节能产品的出口认证现状,立足于出口国的相应空调标准,从技术内容、技术指标、分类原则、节能评价值等几个方面探讨了空调用制冷压缩机节能产品认证的主要准则,以期提高提高厂家制造水平,促进压缩机技术的良好发展。 相似文献
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刘涛 《制冷与空调(四川)》2006,20(4):101-104
随着能源和环境问题与社会经济发展的矛盾日益突出,开发出无CFCs问题的制冷方式、采用可再生能源为动力的制冷空调装置已越来越引起人们的重视。本文介绍了太阳能固体吸附技术的工作原理,分析了太阳能固体吸附制冷技术在制冷空调装置应用的现状、存在的问题及解决的措施,提出应大力推广太阳能固体吸附技术在制冷空调装置中的应用。 相似文献
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模糊控制在制冷空调领域中的应用与发展 总被引:4,自引:1,他引:4
模糊控制技术在制冷空调领域的应用有利于制冷空调的优化运行和节能;本文阐述了模糊控制在制冷空调控制领域应用的研究概况,分析了模糊控制理论在制冷空调领域的研究发展趋势. 相似文献
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Up to now all refrigeration plants used for mine cooling have used chilled water. When these refrigeration plants are situated on the surface, large quantities of water must be sent into the mine and pumped back to the surface again. It was suggested that a viable and economic alternative was to make ice on the surface and send this into the mine to reduce the quantity of water required. This Paper describes the world's first very large ice plant used for mine cooling. Ice from this plant is used to cool hot water originating at an underground fissure, and, in addition, provides cooling in the mine. 相似文献
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从节能和多功能的角度,提出一种新的直流变速多联式空调热水机系统,可实现同时制冷、制热、制冷水和制热水。介绍其运行原理和特性,并分析冷凝余热利用和制热兼制热水等关键技术点。 相似文献
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Methodology for thermal design of novel combined refrigeration/power binary fluid systems 总被引:2,自引:1,他引:1
Refrigeration cogeneration systems which generate power alongside with cooling improve energy utilization significantly, because such systems offer a more reasonable arrangement of energy and exergy “flows” within the system, which results in lower fuel consumption as compared to the separate generation of power and cooling or heating. This paper proposes several novel systems of that type, based on ammonia–water working fluid. Importantly, general principles for integration of refrigeration and power systems to produce better energy and exergy efficiencies are summarized, based primarily on the reduction of exergy destruction. The proposed plants analyzed here operate in a fully-integrated combined cycle mode with ammonia–water Rankine cycle(s) and an ammonia refrigeration cycle, interconnected by absorption, separation and heat transfer processes. It was found that the cogeneration systems have good performance, with energy and exergy efficiencies of 28% and 55–60%, respectively, for the base-case studied (at maximum heat input temperature of 450 °C). That efficiency is, by itself, excellent for cogeneration cycles using heat sources at these temperatures, with the exergy efficiency comparable to that of nuclear power plants. When using exhaust heat from topping gas turbine power plants, the total plant energy efficiency can rise to the remarkable value of about 57%. The hardware proposed for use is conventional and commercially available; no hardware additional to that needed in conventional power and absorption cycles is needed. 相似文献
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提出一种具有半导体制冷的新型膜蒸馏组件,基于半导体制冷原理,选择最佳散热方式——水冷散热,试验研究在同种条件下静态和扰动水域的变化对半导体制冷组件性能的影响。研究结果表明:散热水域的温度以及搅动对其制冷性能影响较大,半导体制冷组件在一定工况运行时,制冷表面温度稳定,保持在-3.2℃,可以满足膜蒸馏进行所需的冷端条件,证明半导体制冷组件可以与膜蒸馏过程耦合,为半导体制冷组件在膜蒸馏试验中的应用提供试验依据。 相似文献
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本文提出一种采用双分层水箱的太阳能喷射制冷循环,分层水箱热分层显著,颇具可用能储存优势,结合大小水箱各自的优势弥补因太阳日辐射量波动而导致太阳能利用率不高、太阳能驱动的喷射制冷效率较低等问题。采用逐时冷负荷分析法分析了双分层水箱太阳能喷射制冷系统特性,结果表明:该制冷循环高品位能耗约为普通机械压缩制冷循环的1/5,较传统水箱太阳能喷射制冷循环全天工作时间约多4 h,日产冷量提高36.8%,且分层水箱喷射制冷系统的逐时制冷量与办公室逐时冷负荷更吻合。 相似文献
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制冷系统中湿式冷却塔的节能分析 总被引:3,自引:0,他引:3
指出对制冷系统中湿式(蒸发式)冷却塔的能耗应给予与制冷机同样的重视,系统节能应整体考虑。分析了冷却塔出水温度、冷却塔飘水对制冷系统性能的影响。 相似文献
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冷却水压差对离心式冷水机的影响分析 总被引:1,自引:0,他引:1
陈祥康 《制冷空调与电力机械》2006,27(1):52-57
通过对离心式冷水机组冷凝器构造的分析,按管壳式热交换器Kern方程,由管程压降计算出冷却水流速,而后得出冷凝器的传热系数,进而算出冷凝器的热负荷和冷水机组的制冷量;建立冷却水压差和离心式冷水机组制冷量的关系,对冷水机组的设计和运行提供了一些参考。 相似文献
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EASY5仿真软件在制冷系统仿真中的应用 总被引:3,自引:0,他引:3
以多相流库为例,介绍美国Boeing公司开发的EASY5仿真软件的理论基础及主要建模方法,并给出了一种风冷制冷系统仿真模型及仿真结果,供国内制冷系统仿真软件的开发工作参考。 相似文献
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首先介绍机械式冷藏集装箱制冷机组的功能和使用要求,并对运输冷却货物和冷冻货物2种不同物品时制冷机组容量调节的相应要求进行论述;然后分析集装箱制冷机组容量调节需要满足的2个条件,并与常规节流机构在调节系统制冷量时的要求进行对比分析;最后针对运输冷却货物时集装箱箱内温控精度要求高的特点,分别介绍当前集装箱制冷机组中常见的吸气节流、多机并联运行和数码涡旋卸载这3种容量调节方式,并对这几种调节方式的系统原理和工作特点进行分析,论述吸气节流和热气旁通这2种容量调节方式的区别。 相似文献