共查询到20条相似文献,搜索用时 171 毫秒
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冰蓄冷中央空调是将实际用电从电网高峰向低谷时段转移,从而提高电网效率和节约能源的有效方法之一。文中主要介绍了冰蓄冷空调负荷计算要点、蓄冰系统的组成及蓄冰系统选择设计计算、冰蓄冷空调系统全年能耗及运行费用;以冰蓄冷空调工程应用实例分析评估了该系统的经济性。 相似文献
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介绍了冰蓄冷空调系统的策略,通过建立冰蓄冷空调系统的经济性模型,进行了经济性优化计算,分析了蓄冷率、峰谷电价比、电力增容费和蓄冷方式等因素对冰蓄冷空调系统在初投资、运行电费和总费用方面的影响。 相似文献
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通过实测、调研某供电大楼冰蓄冷空调系统,从技术和优化运行角度对该冰蓄冷空调系统所测数据进行分析,指出该系统中蓄冰槽蓄冷率低、释冷不足的问题,并进行分析。接着论述了冰蓄冷空调系统的蓄冰槽不仅要在蓄冰量上与系统主机容量相匹配,同时还要考虑到蓄冰槽的蓄冰、融冰特性,最后说明系统运行管理人员对冰蓄冷空调系统在节能运行上产生的影响。 相似文献
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以上海某商业大厦为例,分析了冰蓄冷空调系统的设计方法和运行策略,并通过与常规空调系统的投资及能耗对比,论证了采用冰蓄冷空调系统具有良好的经济效益。 相似文献
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冰蓄冷空调系统的评价方法 总被引:5,自引:0,他引:5
本文分析了影响冰蓄冷空高经济效益和社会效益的因素,建立了一个评价冰蓄冷空调经济性的模型,归纳出评价冰蓄冷空调系统的五项指标:高峰用电转移率,蓄冷率,制冷机容量变化率,性能系数降低率,增加投资回收年限。 相似文献
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蓄冷空调系统经济分析与比较 总被引:10,自引:0,他引:10
建立了常规空调系统和蓄冷空调系统经济分析模型,关利用该模型分别对水蓄冷系统,冰蓄冷系统和共晶盐蓄冷系统的经济效益进行了计算分析与比较,其结果可供有关决策部门参考。 相似文献
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根据某俱乐部中央空调系统的特点及运行情况,采用水蓄冷技术对其进行改造,并进行了经济效益分析。结果表明,采用水蓄冷技术后,不仅降低了初投资,而且降低了运行费用。 相似文献
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Zhihua Hu Huanqun Qian Haipeng Zhang Fangde ZhouState Key Lab of Multiphase Flow in Power Engineering Xi''''an Jiaotong University Xi''''an Shaanxi P. R. China zhaoyc@mail.xjtu.edu.cn 《热科学学报(英文版)》2002,11(2):138-143
Based on the eminent characteristics of the ice-storage systems, which can shift cooling electrical demand from peak time to off peak time, this paper describes the ice storage air-conditioning system that is now used much frequently. The authors develop the operating cost model by simplification and introduce a neural network model and try to solve the optimal cost problem of operation by using this neural network model. In calculation, any trajectory of the neural network converges to its solution in finite time, which is consistent with result by simplex method. Comparing with different methods, the neural network is more effective, which can be alternative to simplex method in calculating the optimal cost model for ice storage air-conditioning systems. 相似文献
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本文建立了蓄冷平板相变换热器中蓄冷平板单体凝固过程变化规律的数理模型,并用一种简便方法求解了凝固过程非稳态移动界面传热问题,获得了有关传热速率,界面移动,载冷剂出口温度的变化规律,讨论了蓄冷平板相变换热器的传热特性。 相似文献
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介绍了一种新型的高效节能中央空调冷暖系统-自备发电、余热利用及热泵冷暖系统。该系统充分发挥了大型建筑必备设备-自备电源应急柴油发电机的作用,使一次能源在使用中更加符合热力学的原理;该系统不追求某一种机组的高COP,而是利用各种设备的优点,有机匹配,以求一年中最高效的节能。通过与三种常规冷暖系统的一次能源利用率比较,得出该新型冷暖系统的一次能源利用率比三种常规冷暖系统的一次能源利用率高27.88%-104.6%以上。并通过实例计算了采用该系统的某大型广场的全年经济效益。 相似文献
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This paper presents an analysis of the general cost associated with single- and double-effect vapour absorption and vapour compression air-conditioning systems. The cost analysis covers the initial costs and the operating costs of each of the three systems. The vapour absorption system considered in this paper is based on water as the refrigerant and lithium bromide solution as the absorbent. The analysis is undertaken to help select an air-conditioning system that fulfils a 250 TOR cooling load of a five-floor student hospital in Alexandria, Egypt. The typical meteorological year database for Alexandria was used to estimate the cooling load for the building. The analysis is based on two different methods, the present worth value (PWC) and the equivalent annual cost (EAC), for initial and operating costs of each system. The selection depends on which system requires the minimum life-cycle cost (LCC) and can perform the intended function for its life span. The analysis also considers the interrelationship between economic and thermodynamic aspects, such as the dependence of operating cost on the surrounding climatic conditions. The method used and the results from this study offer useful guidelines for researchers and decision-makers when selecting an air-conditioning system. The results show that the double-effect vapour absorption system is the preferred option for its minimum present worth value as well as the equivalent annual cost. 相似文献