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蓄冷空调控制策略的选择及运行优化 总被引:1,自引:0,他引:1
蓄冷技术在空调中的应用使得满足空调负荷有更多的灵活性和复杂性。蓄冷空调能否达到节能降耗的目的,不仅取决于进行系统的合理设计,也取决于系统运行控制策略的合理选择和优化。本文介绍了蓄冷空调系统运行策略的选择原则、影响优化运行的因素和实现优化运行的方法。 相似文献
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选择完全冻结式冰蓄冷空调系统和非蓄冷空调系统作对比,通过计算某大楼的设计日及全年空调负荷,得出各自所需的设备容量及电功率大小,分析比较了初投资及年运行电费等,以经说明,采用完全冻结式冰蓄冷空调系统替代非蓄冷空调系统,在技术上是可行的,且具有明显的社会效益和经济效益。 相似文献
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介绍了冰蓄冷空调系统在实际工程中的应用。在本工程中,对于24小时连续使用的部分按常规空调系统设计;对于间歇使用的部分,采用双工况冷水机组和冰球蓄冷方式,并在各种运行模式中灵活转换。并且进行了经济性分析,认为在电力部门给予一定的优惠政策的条件下,可以选用冰蓄冷系统。 相似文献
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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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分析了直接蓄冰系统的动态特性,建立了相应的物理模型,并利用该模型得出了蓄冰半径及蓄冷率随时间的变化规律,模型预测值与实测值吻合较好。该模型可为直接蓄冰系统的设计及优化提供理论依据。 相似文献
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针对小型家用冰蓄冷空调必须简单可靠、体积小的要求进行了新技术方案的试验。试验装置采用新循环方式,在结构上采用两个节流阀分别对两个冰盘管进行节流,用中间隔板和散流器进行冷热水隔离。试验结果表明,整个方案和这些技术措施都是有效的。 相似文献
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In the present paper, design and economics of the novel type of thermal control system for datacenter using heat pipe based cold energy storage has been proposed and discussed. Two types of cold energy storage system namely: ice storage system and cold water storage system are explained and sized for datacenter with heat output capacity of 8800 kW. Basically, the cold energy storage will help to reduce the chiller running time that will save electricity related cost and decrease greenhouse gas emissions resulting from the electricity generation from non-renewable sources. The proposed cold energy storage system can be retrofit or connected in the existing datacenter facilities without major design changes. Out of the two proposed systems, ice based cold energy storage system is mainly recommended for datacenters which are located in very cold locations and therefore can offer long term seasonal storage of cold energy within reasonable cost. One of the potential application domains for ice based cold energy storage system using heat pipes is the emergency backup system for datacenter. Water based cold energy storage system provides more compact size with short term storage (hours to days) and is potential for datacenters located in areas with yearly average temperature below the permissible cooling water temperature (∼25 °C). The aforesaid cold energy storage systems were sized on the basis of metrological conditions in Poughkeepsie, New York. As an outcome of the thermal and cost analysis, water based cold energy storage system with cooling capability to handle 60% of datacenter yearly heat load will provide an optimum system size with minimum payback period of 3.5 years. Water based cold energy storage system using heat pipes can be essentially used as precooler for chiller. Preliminary results obtained from the experimental system to test the capability of heat pipe based cold energy storage system have provided satisfactory outcomes and validated the proposed system concept. 相似文献
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I.S ChoiJ.D Kim E Kim J.I Yoon 《International Journal of Heat and Mass Transfer》2002,45(7):1407-1412
This paper is concerned with the development of a new method for making and separating ice and saving floated ice by installing an evaporation plate at underwater within a storage tank. In a conventional harvest-type ice storage system, a tank saves ice by separating a formed ice from an installed evaporation plate, which is located above an ice storage tank as an ice storage system. A new harvest-type method shows better heat transfer efficiency than a convectional method. It is because the evaporation panel is directly contacted with water in a storage tank. Also, at a conventional system a circulating pump, a circulating water distributor and a piping are installed, but these components are not necessary in a new method. In this study two kinds of ice storage systems are experimentally investigated to study the thermal characteristics of ice storage tanks. The results show the applicable possibility and performance enhancement of a new type. 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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At present, all types of large–medium‐sized supermarkets with aquatic products adopt ice preservation to ensure freshness. The traditional method of ice preservation needs to make a large amount of thick ice and thus wastes manpower and freshwater. A new ice preservation system with cold storage (IP&CS) is designed, and its performance is tested. The use of a cold storage tank to replace the thick ice laid achieves a repeated cold storage and discharge. This experiment uses NaCl solution as the cold storage phase change material (PCM). The phase change temperature of the cold storage PCM and the optimum temperature of the secondary refrigerant during the cold storage process are determined. Results show that the center temperature of aquatic products, water loss rate, color of aquatic products, power consumption, and electricity cost of the IP&CS system are better than those of the traditional ice preservation system. 相似文献