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《建筑热能通风空调》2017,(12)
将冷却塔供冷系统应用于杭州某电子厂房空调系统节能改造项目中,主要从建立冷却塔供冷系统模拟平台,系统运行模式和控制,影响因素及优化,实测分析及节能改造的经济性等方面进行研究与分析。利用TRNSYS模拟软件,针对杭州市某电子厂空调系统节能改造项目,建立适合的冷却塔供冷系统模型。分析了该系统的运行模式和控制策略。探讨了冷却塔供冷系统在其它典型城市工业建筑节能改造中的应用潜力,并对冷却塔供冷系统模型模拟的结果进行分析。结果表明,冷却塔供冷系统在工业建筑节能改造中的节能潜力较大。 相似文献
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电子厂房空调系统需要全年供冷,在冬季,利用冷却塔自然供冷可以节约冷水机组的运行能耗,其节能潜力较为可观。本文针对上海地区某电子厂房空调系统,分析了冷却塔间接供冷方式下供水温度、冷却塔及板式换热器效率对自然供冷率的影响。通过自然供冷率的对比,分析系统的节能潜力。研究结果表明,在12月到3月四个月内采用冷却塔自然供冷,可以... 相似文献
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冷却塔供冷系统运行能耗影响因素的研究与分析 总被引:11,自引:3,他引:8
根据大量模拟结果,分析了冷却塔供冷系统形式、气象条件、建筑负荷特点、供冷温度等对冷却塔供冷系统运行能耗的影响,以深化对冷却塔供冷系统的认识与理解,为此项技术的推广应用提供参考。 相似文献
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以杭州某办公楼为例,提出了建筑内区在过渡季和冬季利用新风供冷和冷却塔供冷2种方案,对二者进行了技术要点分析和综合比对。对于新风供冷方案,分析了室内温度、新风温度、新风比之间的关联及供冷小时数的影响。对于冷却塔供冷方案,分析了不同室内温度、供回水温差下所对应的风机盘管最高供水温度,研究了冷却塔热工性能曲线、冷却塔流量比、供回水温差对冷却塔供水温度的影响,探讨了冷却塔供冷不同工况下运行水温、切换温度、供冷时长、水泵配置及供冷系统运行策略。最后,计算了新风供冷和冷却塔供冷系统的节能量及经济性。 相似文献
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《建筑热能通风空调》2017,(10)
介绍了冷却塔供冷系统在上海保利凯悦酒店及商业文化中心酒店项目中的应用,对冷却塔供冷系统的设计方法进行了总结,阐述了系统设计中冷冻水、冷却水供回水温度的确定、水泵匹配、冷却塔配置、系统节能计算等问题。 相似文献
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集中空调冷却水系统的节能运行 总被引:15,自引:5,他引:10
简述了集中空调系统中冷却水系统典型运行方式,并指出这些运行方式不节能的原因。提出了冷却水泵变速驱动和风机起停控制的节能运行方式,并以算例分析了该方式的节能效果。 相似文献
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根据上海一办公楼置换通风和冷却顶板复合系统的设计及运行特点,应用EnergyPlus软件模拟了采用转轮除湿方式的复合系统的供冷季能耗,并分别模拟了采用冷却除湿方式的复合系统、带热回收装置的混合通风系统和置换通风系统的供冷季能耗以进行对比。结果表明,在湿热地区采用转轮除湿方式可比冷却除湿方式节约制冷机冷量,空调季总能源费用比混合通风系统节约30%左右。 相似文献
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The cooling degree days concept is a tool to estimate and analyze weather related energy consumption in buildings, i.e. the cooling system electric energy consumption. The main problem with applying this method is that it disregards latent cooling loads. This paper deals with an approach for monitoring electric energy consumption due to cooling in buildings based on cooling degree days, which allows an estimation of latent loads. In addition to applying methods for determining base temperature to base humidity, a new technique is introduced, which is based on a significance test of the enthalpy latent days partial regression coefficient. Analogous to the performance line concept, the influence of latent loads can be presented in the form of a “performance surface” graph. The performance surface is a plot of electric energy consumption as a function of cooling degree days and latent enthalpy days. The above methods are tested on data sets consisting of electric energy consumption data obtained from two buildings and hourly meteorological data. 相似文献
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Increasing concerns about the lack of energy resources, global warming and environmental pollution have pushed the relevant organizations to develop energy saving strategies such as energy labeling programs. In this research, a new energy labeling program is developed and evaluated for the wet cooling towers in Iran. The cooling tower parameters, including its cooling capacity and the fan power consumption, are measured using an experimental setup. The experimental data are standardized to compensate the effect of the ambient wet bulb temperature on the cooling tower performance which cannot be controlled during the experiments. The results show that the cooling tower capacity and the fan power consumption may be correlated properly using a linear function which conducts the authors to present a linear energy index (EI). Based on the statistical analysis of a comprehensive range of products, the energy rating limits are extracted for the main types of cooling towers, including induced draft and forced draft ones. The economical and environmental impression of the program authorization is also discussed in detail. Administration of such program may lead to considerable energy saving in the cooling systems which have major economical and environmental benefits, especially in the large industries. 相似文献
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热电冷三联供供冷方式的分析与评价 总被引:1,自引:0,他引:1
依据热力学第二定律的(火用)分析方法,从能量利用的全过程出发,考虑输送能耗的影响,利用能源(火用)效率代替设备的能量利用效率对热电冷三联供的集中供冷和常规的电供冷方式进行了比较,从而得出了更客观、合理的结论,为合理采用热电冷三联供的集中供冷方式提供了判断依据。 相似文献