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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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结合工程实例,分析了集中空调系统冷却塔噪声超标的原因,给出降低噪声的措施,计算了各消声措施的噪声衰减量。实测结果表明,消声效果良好。 相似文献
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冷却塔设计布置实例谈 总被引:1,自引:0,他引:1
冷却塔的噪声和水雾对周围的环境影响很大,尤其是大型建筑的冷却塔群,由于放置空间所限,在设计中对其进行合理的布置更显重要。通过工程实例,介绍了冷却塔有效排布的思路和方法。 相似文献
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北京市崇文区某剧院空调系统节能改造 总被引:1,自引:0,他引:1
分析了崇文区某剧院原集中空调系统制冷效果差、电能损耗高的问题,在进行改造设计时,提出了若干技术措施.改造后的空调系统效果良好,通过测试不同的运行模式,均达到了节电节能的目的,为类似的改造工程积累了经验. 相似文献
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12MW凝结水泵变频改造浅析 总被引:1,自引:1,他引:0
以泰能集团热电公司12MW机组工程为例,详细地介绍了凝结水泵变频改造的节能原理、经济性及运行措施,通过对改造前后的运行比较,阐述了节能效果、效益和为运行人员调整带来的便剩。 相似文献
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为满足日趋增大的冬季内区制冷需要,在综合考虑节能效果及方案有效性等多种因素后,文中选用闭式冷却塔作为冬季冷源,并结合哈尔滨市医科大学附属第四医院门诊外科楼项目这一工程实例进行进一步论述。结果表明闭式冷却塔系统运行良好,满足使用需求,有效且节能,为类似工程提供了实际参考。 相似文献
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传统的余热电站冷却塔为电动风机冷却塔,耗电量高、设备故障率高。而水轮机冷却塔是利用循环水系统的回水动能推动水轮机转动,是“系统能量的二次利用或回收”,完全可以替代电动风机冷却,达到降低电耗、运行安全的要求。本文从电动风机冷却塔改造为水动风机冷却塔的可行性分析、改造方案、改造费用、改造成效等方面,阐述了水轮机替代电动机的可行性。 相似文献
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Thermal performance of buildings is mainly determined by their thermo-physical and operational characteristics as well as the prevailing climatic conditions. Mosques which represent a unique type of building in terms of construction and operation can be major consumers of cooling energy, particularly in hot climates, if not properly designed and operated. In this study, energy modeling and simulation is utilized to identify potential energy savings due to envelope retrofitting measures and air-conditioning (A/C) operational strategies while maintaining acceptable thermal conditions. Results revealed a good potential for energy reductions when proper thermal retrofitting and operational strategies are employed. As much as 26% reduction in annual cooling energy is obtained when applying roof and wall insulation and reducing air infiltration to 0.5 ACH. By implementing a proper A/C operational strategy and employing system efficiency improvements, the required cooling energy can be reduced by around 36%. The total reduction in cooling energy consumption due to combined A/C system and envelope retrofit measures can be as much as 48%. A number of recommendations pertaining to mosque design, retrofitting and A/C operational strategies are derived. These are expected to be of great use to mosque designers and operators worldwide, but particularly in hot climates. 相似文献
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从建筑外观、空间限制、运行噪音等角度考虑,冷却塔一般被布置在隐蔽的区域。冷却塔的布置决定了热湿空气回流的情况,并直接影响冷却塔的运行性能。横流冷却塔侧面进风,逆流是塔身下部四周进风。冷却塔回流导致进风温湿度增高,同时,恶化周边微环境。采用数值模拟方法研究逆流与横流冷却塔布置方式的回流及影响。通过对比2种塔进风口空气的温升,来判断两种塔的回流量情况,并提出可行的措施来减少回流量。模拟表明逆流的进风温升和回流率都低于横流的,是因为逆流布置使进风气流更均匀,且排风风速大。模拟了横流冷却塔出风圆管口加15°向上百叶、加2.2 m进风百叶的优化措施,该措施可有效减少回流量。研究结果可为工程设计提供参考,以降低由于冷却塔设计不当引起不利的回流影响。 相似文献
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本文介绍了某卷烟厂空调系统采用2种控制方式——手动控制和自动控制模式下的实际空调效果及能耗的对比测试,给出了该空调控制系统进行节能改造后的节能量。测试结果表明:通过增加水泵和冷却塔的变频控制策略及制冷机、水泵和冷却塔的加减机控制策略,空调系统能更好地满足设计要求,能耗明显降低;节能量的多少和手动控制的水平有很大关系,制冷站的平均节电率为16.0%、水泵和冷却塔的平均节电率为32.6%、制冷机的平均节电率为8.7%;经济性分析可知,每年平均节省电费148.4万元,基本1 a就可以收回投资改造费用。 相似文献
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Sophie Simpson Phil Banfill Becky Mallaband Val Mitchell 《Building Research & Information》2016,44(1):97-115
Interviews conducted with householders reveal that energy efficiency is often a lesser motivation than other factors for undertaking home improvement work. Homeowners’ approach to refurbishment is typically staged over several years, not as a whole-house retrofit. As the operational performance of an individual emission-reducing technology typically depends on what other measures are already in place, the retrofit intervention sequence can potentially affect the overall performance of the dwelling. The impact of the intervention sequence on a semi-detached 1930s' house is investigated with dynamic thermal modelling, using five sequences based on different homeowner personas developed from qualitative interviews. The results show that whilst a whole-house retrofit would reduce cumulative CO2 emissions over 25 years by 54%, the sequences actually implemented by the individual households result in significantly smaller reductions of between 42% and 24%. This variation in operational performance due to the intervention sequence means that there is a variable return on the investment for a particular technology and, significantly, that different sequences will yield different cumulative emission reductions. This has significant consequences for policies providing financial incentives for energy-led retrofit, particularly to include the intervention sequence and timing. 相似文献