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铁岭市城区集中供热热力网可行性研究报告 总被引:1,自引:1,他引:0
结合铁岭市现有采暖热负荷和近期发展热负荷,利用铁岭发电厂现有2台300MW纯凝汽发电机组改造成供热机组及其新区调峰锅炉房,进行热电联产集中供热,以符合国家中长期节能规划及“节能、减排”的政策。 相似文献
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采暖建筑进行热计量改造后,用户可以根据热需求进行室内温度控制和调节,由于用户设定室内温度不同,从而形成不同的热负荷特性。根据热计量用户用热负荷作为分析依据,通过采集热用户室内温度、设定温度、耗热量、开启及断开时间等数据,采用K-means算法对数据进行聚类,以此获取热计量用户负荷特性。利用聚类结果及居住位置对热用户的行为节能进行分析,得出不同居住位置用户室温、设定温度以及热负荷规律,为用户按需用热、热力公司按需供热提供参考,为合理地开展采暖建筑节能起到促进作用。 相似文献
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供暖热负荷随室外温度而变化。供暖期热负荷延时曲线描写室外温度和供暖延续时间的关系,表征供暖热负荷随延续时间的变化。在供热系统的设计和运行中,可应用该曲线确定年供热量,对不同热源设备的供热量合理进行利用和分配。是供热技术经济分析及系统优化计算的必不可少的组成部分。 相似文献
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分布式变频调节系统中泵的选择和应用 总被引:1,自引:0,他引:1
1、概述 太原市集中供热(一电)工程自1994年11月开始投入运行以来,已形成供热能力646.4MW,供热面积1010万平方米的规模。 但随着供热范围内各类建筑物密度的增加,热负荷的增大,城市规划的调整,使热力站的供热负荷和位置也随之发生很大的变化,造成管网的水力工况失调,局部站点的资用压头不足。太原市热力公司经过对不同改 相似文献
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利用变频技术和自控技术对部分换热站供暖换热系统进行改造,新装换热站融入其技术,达到节能降耗改善系统性能,调节热负荷的目的。 相似文献
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合理的确定集中采暖分户热计量设计热负荷附加率是计算房间热负荷的重要环节。在不同位置、不同楼层的情况下,对房间的户(室)间传热量在总耗热量中所占的比例进行了计算。结果表明,影响设计热负荷附加率的因素有外围护结构传热面积及传热系数,内围护结构传热面积及传热系数。 相似文献
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针对液化石油气家用燃气灶,提出将铸铁材质的引射器、燃烧器头部改用铝合金材质。对采用两种材质燃气灶的关键位置温升、热效率、折算热负荷进行了实测计算。采用铝合金材质时,引射器、燃烧器头部温升较高,但其他部位的温升未受影响,未对燃气灶的热效率、折算热负荷产生不良影响,折算热负荷仅有小幅下降。 相似文献
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《Planning》2015,(19)
某300MW电厂四角切圆燃烧方式进行烟气脱硝改造后,在控制氮氧化物生成、燃烧稳定与安全性以及汽温偏低等方面以实验数据为依托进行了分析。结果表明:分级低氮燃烧方式与燃烧的稳定性是相对的;上层SOFA风的开度对氮氧化物排放的控制及对消除热偏差有显著效果;中低负荷下,低氮燃烧造成炉渣含碳量增加;中低负荷低氮燃烧前屏易超温,主再热汽温偏低,热偏差大。 相似文献
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A retrofit study was conducted in an unoccupied manufactured house to investigate the impacts of airtightening on ventilation rates and energy consumption. This paper describes the retrofits and the results of the pre- and post-retrofit assessment of building airtightness, ventilation, and energy use. Building envelope and air distribution systems airtightness were measured using fan pressurization. Air change rates were measured continuously using the tracer gas decay technique. Energy consumption associated with heating and cooling was monitored through measurement of gas consumption by the forced-air furnace for heating and electricity use by the air-conditioning system for cooling. The results of the study show that the retrofits reduced building envelope leakage by about 18% and duct leakage by about 80%. The reduction in the house infiltration rates depended on weather conditions and the manner in which the heating and cooling system was controlled, but in general these rates were reduced by about one third. The energy consumption of the house for heating and cooling was reduced by only about 10%, which is relatively small but not totally unexpected given that infiltration only accounts for a portion of the heating and cooling load. 相似文献
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为研究建筑围护结构属性对同一热工分区不同城市节能建筑负荷影响的敏感性,以同属于寒冷地区的兰州和郑州为研究目标所在城市,在节能65%的前提下将4种外墙、3种外窗和4种窗墙比进行组合得到了48个可能的办公建筑围护结构计算房间。分别计算了这些房间的冷负荷、热负荷和全年总负荷并分析了各热工参数对负荷的影响。通过与基准房间负荷对比,获得了具有不同热工性能的计算房间的节能率及最优的办公建筑围护结构。 相似文献
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遮阳系数对供暖与空调能耗影响差异的逐时解析 总被引:4,自引:0,他引:4
以中国福州为例,从当地逐时气象数据入手,分析了建筑空调负荷及供暖负荷的所有时刻对应的逐时太阳辐射,用特征温度法研究当遮阳系数减小时各时刻建筑的空调与供暖能耗及相对变化(节能率)情况。研究发现,由于冬季有太阳辐射各时刻的供暖能耗相对于无太阳辐射各时刻能耗比例很小,故遮阳措施对供暖总能耗的影响不显著,从而证明DOE-2关于冬季遮阳系数减小对供暖能耗影响的结论值得商榷;由于夏季有太阳辐射各时刻空调能耗远大于无太阳辐射各时刻空调能耗,故遮阳措施对空调总能耗及节能率的影响非常显著,DOP2软件与特征温度法的结果是正确的;通过对福州全年各时刻空调供暖能耗、建筑负荷及节能率进行解析,揭示了看起来很分散的各时刻能耗及节能率差异数据总体上遵循的某种共性规律,供同行参考。 相似文献
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The impact from using cool roof coatings on the cooling and heating loads and the indoor thermal comfort conditions of residential buildings for various climatic conditions is estimated. The energy cooling loads and peak cooling demands are estimated for different values of roof solar reflectance and roof U-value. The results show that increasing the roof solar reflectance reduces cooling loads by 18–93% and peak cooling demand in air-conditioned buildings by 11–27%. The indoor thermal comfort conditions were improved by decreasing the hours of discomfort by 9–100% and the maximum temperatures in non air-conditioned residential buildings by 1.2–3.3 °C. These reductions were found to be more important for poorly or non-insulated buildings. For the locations studied, the heating penalty (0.2–17 kWh/m2 year) was less important than the cooling load reduction (9–48 kWh/m2 year). The application of cool roof coatings is an effective, minimal cost and easy to use technique that contributes to the energy efficiency and the thermal comfort of buildings. 相似文献
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医院建筑能耗逐年升高,其中空调能耗占总能耗比例较大。在医院建筑的节能改造或能耗状况分析中,多数以单位建筑面积、门诊人数、床位数的能耗来评价医院能耗的高低。以夏热冬暖气候区医院门诊楼为研究对象,通过理论分析建立建筑负荷分析模型,设计建筑负荷正交模拟实验,利用模拟软件De ST进行负荷模拟,研究建筑面积、床位数、门诊量/床位数、医院类型对建筑全年总负荷的影响,模拟结果表明:建筑面积(床位数)越大,门诊量/床位数越大,未开展预约门诊的医院的年总负荷越大,反之越小。建筑年总负荷影响因素的主次顺序为门诊量/床位数建筑面积(床位数)医院类型,其中门诊量/床位数、建筑面积(床位数)对年总负荷影响显著(P0.05);医院类型对年总负荷影响不显著(P0.05)。建议采用人均单位面积能耗占用床位数指标来评价门诊楼的能耗,更加科学。 相似文献
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《Building and Environment》2005,40(4):529-536
By comparative research on the variation law of the annual relative variation rates (RVRs) of the hourly heating and cooling load with shading coefficient in all the hours, respectively, without and with solar radiation in two cities (Tampa of USA, Fuzhou of China), we can find that: for the hours without solar radiation, the heating and cooling load and its RVRs unchange with sun-shading coefficient while for the hours with solar radiation, shading coefficient has a significant influence on the heating and cooling load and its RVRs. By contrast, it can be found: both the hours in need of heating and cooling around the year (respectively, for the hours with and without solar radiation) and the hourly distribution of annual heating and cooling load are quite different in the two cities; Besides, the difference of hourly heating and cooling load probably amounts to more than 1000 times. However, with the same shading coefficient, the distributions of heating and cooling RVRs in each hour with solar radiation are very similar in the two cities. The author reveals the similarity of the variation law of the hourly load and just the intrinsic similarity determines that it is inevitable that the annual RVRs of energy consumption are approximate under different climatic conditions (cities) when taking the same shading measures to the same building. 相似文献