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采用SCIENCE软件对南京地区冬季某日一变频空调房间的热环境进行数值模拟,得出了采暖能耗和PMV随外墙构造和窗墙比的变化规律,并通过室内加热量和平均PMV对其进行分析.研究表明:墙体传热系数越低,越节能,随传热系数的逐步减小,节能增加效果减弱;综合考虑南京地区外墙宜选用保温墙24;能耗随窗墙比增大以指数增加,窗墙比每增加10%,能耗增加0.24%~2.74%;围护结构中外墙和窗户对能耗的影响较大,比重分别为50.4%和34.9%;外墙构造对室内热舒适性的影响不大,但窗墙比影响较大,窗墙比越大,平均PMV值波动越厉害,热舒适性越差. 相似文献
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<正> 据世界大多数国家的能源资料记载,建筑能耗(包括建筑物的生产能耗、施工能耗、民生能耗即住宅、公寓的日常能耗)已占全部能耗的20~40%,而其中住宅民用耗能又占其中2/3,所以世界各国都在探讨节能型住宅及小区的发展方向。本文在概述国外先进国家建筑节能方法后,重点提出符合我国不同地区的节能对策;通过节能型住宅的系统分析论证,提出了全面建筑节能的评价方法;做为一种尝视本文还突出设计失误,故障分析条件下的节能原则。 相似文献
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在我国严寒地区农村住宅外附加阳光间可以提高室内温度,减缓温度波动并减少采暖能耗。以安达市某农村住宅为例,基于EnergyPlus进行采暖期能耗模拟,并进行经济和环保效益的评价分析。结果表明:当采暖设计温度为18℃时农村住宅附加阳光间的节能效率最高,可达22.73%。室内采暖设计温度每升高2℃,总能耗呈1.4~2.7倍增长,采暖设计温度为20℃的采暖能耗为14℃的6.7倍。在经济效益方面,在寿命期15 a内均能收回成本,在环保方面,阳光间在寿命期内可以减少排放二氧化碳13.52 t、二氧化硫238.80 kg、氮氧化物205.20 kg及粉尘99.63 kg,同时节约碳排放税35 272.0$,经济和环保效益非常显著。 相似文献
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This paper investigated the variation of building heating energy consumption caused by global warming in Tianjin, China. Based on the hourly historical and monthly projected future (B1/A1B emissions scenarios) meteorological data, the variation of those relevant meteorological parameters was first analyzed. A TRNSYS simulation model for a reference building was introduced to investigate historical variation of office building energy consumption. The results showed that the 10-year-average heating energy consumption of 2001–2010 had reduced by 16.1% compared to that of 1961–1970. By conducting principal component analysis and regression analysis, future variation of building heating load was studied. For B1/A1B emissions scenarios, the multi-year-average heating load was found to decrease by 9.7% (18.1%)/10.2% (22.7%) compared to that of 1971–2010 by 2011–2050 (2051–2100). 相似文献
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北方地区建筑渗风能耗与传热能耗的比例分析 总被引:2,自引:0,他引:2
高层建筑渗风能耗已成为暖通专业中不容忽视的问题,本文不北方地区高层住宅建筑的渗风能耗以算例的形式进行了具体的量化分析,提出了减少渗风能耗的几种方法。 相似文献
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《Renewable Energy》2007,32(11):1805-1816
In this study an attempt is made to investigate the impact of the urban heat island (UHI) effect on the energy consumption of a building using both, an accurate, extensively validated, transient simulation model and a neural network one. The energy consumption is calculated for a typical building during the summer period at 20 different sites of the Greater Athens area with the aid of the TRNSYS model. It was found that the UHI affects significantly the thermal behaviour of the building, implying much lower cooling load cost and energy cost in the suburban areas. A neural network model was then appropriately designed and tested for the estimation of the energy consumption, employing as an input, the UHI intensity. The results of both methods were tested and compared and it was found that there is a good agreement between the cooling rate values calculated by the TRNSYS programme and those derived by the neural model. Moreover, the employment of the neural model helped in quantifying the contribution of each input parameter in the calculation of the cooling rate, and it was demonstrated that the UHI effect is a predominant parameter, affecting considerably the energy consumption of a building in the Mediterranean region. 相似文献
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温频法是计算建筑物能耗的一种简单稳态方法,需要可靠细致的温频参数.由于在国内尚无法得到长周期逐时温度参数,关于温频法气象参数的研究和应用相对缺乏.本文通过分析南京市2004-2006年间的逐时气象数据,得出南京市2004-2006年间建筑能耗分析用BIN参数.通过对比典型气象年和代表年的BIN参数,得出结论,气候变暖已是不争的事实,建筑能耗分析需使用近期气象数据. 相似文献
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以集成江水源热泵供能系统的公共建筑为对象,建立建筑供能成本最低、非舒适性时间最短、热泵用电峰谷比最小的多目标函数,基于动态能耗瞬时模拟技术和改进非支配排序遗传算法联合求解帕累托前沿,引入熵权优劣解距离法评价最优决策解;以夏热冬冷地区办公建筑为例,验证优化方法的可行性和最优设计方案。结果显示:最优方案与基准方案相比,建筑供能成本增加2.6%,非舒适性时间减少3.7%,热泵用电峰谷比降低90.6%;运行成本虽然稍有增加,但舒适性得到了提升,且用电峰谷波动性得到较大改善。 相似文献
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建筑能耗分析是建筑节能和建筑能效管理的基础。在分析常用建筑能耗分析方法的基础上,对比了计算机模拟法、度日法、温频法三种方法的优缺点,并简要介绍一些改进措施,使计算结果更符合实际情况,为建筑能耗计算及节能措施研究提供有益的参考。 相似文献