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集中式空调系统能耗评价体系的研究 总被引:6,自引:1,他引:6
结合武汉地区的工程,给出了典型建筑当量满负荷运行时间,讨论了集中空调系统全年能耗计算方法和能耗评价体系,认为周边全年热负荷系数PAL、空调能耗因数CECAC是适合评价我国集中空调系统设计是否合理的有效能耗评价指标,但CECAC对基于计算负荷偏大所匹配的空调设备没有约束边界条件,建议尽快研究适合我国的PAL,CECAC基准。 相似文献
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游泳馆的热负荷主要包括:1)池水预热负荷;2)维持池水温度所需热负荷;3)供暖负荷;4)补充水加热负荷;5)管道和设备热损失负荷;6)淋浴用水热负荷.游泳馆的热负荷是游泳馆的主要能耗,其计算方法的正确和准确与否,直接关系到游泳馆的使用效果、设备选型和运行费用.提出了游泳馆的热负荷计算方法,指出了国内游泳馆主要设计标准和计算方法所存在的问题,给出了实际案例的计算结果. 相似文献
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计算部分负荷性能参数正确选择冷水机组 总被引:22,自引:1,他引:22
推导出了计算空调季节总能耗,总制冷量,季节能耗指标及季节能效比的简单公式,算出了评价各种冷水机组在整个空调季节运行综合性能的参数-部分负荷性能综合值,阐述了从能耗角度选择冷水机组的原则。 相似文献
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对建筑材料环境负荷影响的评价因素进行研究,通过资料统计与计算,得出钢材、铝材、建筑玻璃、建筑卫生陶瓷等建筑材料单位生产能耗和温室气体CO2排放量,分析了它们对能源和环境负荷的量化影响,以此为基础尝试建立了比较不同住宅结构类型对温室气体环境负荷影响评价的参考方法,并通过案例计算验证。 相似文献
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空调冷源的部分负荷性能系数计算分析 总被引:4,自引:1,他引:3
以某综合性商场的集中空调冷源设备年运行参数为依据,建立了部分负荷能耗系数计算公式,作为计算空调系统全年能耗的基础。认为只要考虑不同气候条件、建筑功能等因素,对公式系数进行适当修正,就可以对不同地区、不同建筑所用空调冷源的全年能耗进行计算。 相似文献
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建筑能耗计算软件DOE-2在能耗计算中存在一些局限,其中对层数有明确的限制.结合理论推导,采用DOE-2软件动态计算分析,来探讨合理的高层建筑能耗的计算方法,突破建筑能耗软件的局限性. 相似文献
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Mahmoud A. Hassan Sayed S. Shebl Essam A. Ibrahim Heshmat A. Aglan 《Building Simulation》2011,4(3):255-262
The thermal performance of an affordable energy-efficient single-story residential building designated as Tuskegee Healthy
House (THH) was simulated by developing a computational model for the house using Visual DOE-4 commercial software. Visual
DOE-4 package employs the same calculation engine of the proven DOE-2 building Energy Analysis program. The THH was built
from conventional building materials and construction methods according to the southern building codes of the United States.
Several energy efficiency and air quality control features were incorporated throughout the THH. The present model was validated
by comparison of computed results with power consumption data available from a previous study of the same house. The experimental
data were obtained for forced ventilation flow rates of 0, 28.3 L/s and 54.3 L/s. A favorable agreement between the model
predictions and experimental data is observed which is indicative of the model’s accuracy. The simulations also show that
the heating, ventilation, and air conditioning (HVAC) energy requirement for THH is reduced when forced ventilation is increased
during the summer months. However, ventilation during the winter months leads to a rise in THH energy requirement. 相似文献
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广州居住建筑空调能耗实测研究 总被引:3,自引:0,他引:3
对一栋9层住宅楼顶层和8层的两住宅单元作了空调能耗和室内温度的实测,介绍了住户的空调使用情况。将实测数据与采用DOE-2程序所作理论计算结果加以比较,分析了影响空调能耗的屋顶构造、窗墙比、室内设定温度等关键因素。 相似文献
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华北地区采暖居住建筑全年能耗分析 总被引:1,自引:0,他引:1
采用DOE-2动态冷热负荷模拟计算软件对华北地区既有建筑节能改造前后的全年建筑能耗进行了分析,提出了华北地区既有建筑节能改造节能效益分析的新观点,即华北地区既有建筑节能改造要分析冬夏两季的全年综合节能效益,同时应计入热源和电力建设初投资费用的节省,这对推动我国华北地区既有建筑的节能改造具有积极意义。 相似文献
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Building energy simulation is widely used to help design energy efficient building envelopes and HVAC systems, develop and demonstrate compliance of building energy codes, and implement building energy rating programs. However, large discrepancies exist between simulation results from different building energy modeling programs (BEMPs). This leads many users and stakeholders to lack confidence in the results from BEMPs and building simulation methods. This paper compared the building thermal load modeling capabilities and simulation results of three BEMPs: EnergyPlus, DeST and DOE-2.1E. Test cases, based upon the ASHRAE Standard 140 tests, were designed to isolate and evaluate the key influencing factors responsible for the discrepancies in results between EnergyPlus and DeST. This included the load algorithms and some of the default input parameters. It was concluded that there is little difference between the results from EnergyPlus and DeST if the input values are the same or equivalent despite there being many discrepancies between the heat balance algorithms. DOE-2.1E can produce large errors for cases when adjacent zones have very different conditions, or if a zone is conditioned part-time while adjacent zones are unconditioned. This was due to the lack of a strict zonal heat balance routine in DOE-2.1E, and the steady state handling of heat flow through interior walls and partitions. This comparison study did not produce another test suite, but rather a methodology to design tests that can be used to identify and isolate key influencing factors that drive the building thermal loads, and a process with which to carry them out. 相似文献