共查询到20条相似文献,搜索用时 78 毫秒
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在威斯康星州的绿湾(Green Bay),正在重建世界上最大的平板太阳能系统(图略),建成后该系统有9750个太阳能收集器,总面积为290.550平方英尺,将为帕克兰德(Packer Land)食品加工公司的宰牛加工场连续地提供热水。 相似文献
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在威斯康星州的绿湾(Green Bay),正在重建世界上最大的平板太阳能系统(图略),建成后该系统有9750个太阳能收集器,总面积为290,550平方英尺,将为帕克兰德(Packer Land)食品加工公司的宰牛加工场连续地提供热水。这一设备每天耗热水达350,000加仑,高峰时每小时需用水30,000加仑。经过四个处理热交换器供应热水,出口处的水温为90℉,95℉,120℉和180℉。来自太阳能收集器的隔离管道中充有丙烯乙二醇(图略),在一个三一回路的平板热交换器中进行循环,交 相似文献
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介绍太阳能热水系统结合低温热水地板采暖系统的工作原理,以上海地区为例,在高层住宅中应用壁挂式太阳能集热器,可以实现太阳能与建筑一体化。对该太阳能系统进行节能效益分析,结果表明,系统的动态回收期为3.98年。 相似文献
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介绍了太阳能热水系统的基本形式,以及其相应的太阳能热水器、集热板的优缺点.并阐述了太阳能建筑一体化技术应用也是实现建筑节能与住宅建筑可持续发展的亮点. 相似文献
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A solar plant for hot-water production was investigated by the dynamic simulation code (TRNSYS). A typical daily home consumption for a 4 persons family was considered. The hot-water demand temperature (53 °C) is controlled by a conventional fuel auxiliary heater and a tempering valve. A heat-exchanger is considered between collector and storage tank. The fluids circulate by pumps activated by photovoltaic panels. This simplifies plant control systems and allows for stand-alone utilization of the plant. Annual energy performance, in terms of solar fraction, was calculated for three Italian localities. The economic viability of such a plant was evaluated with the life cycle savings (LCS) method, considering three conventional fuels (Gas-Oil, LPG and Electricity). Italian Government incentives show an economic viability only in comparison with electrical energy. 相似文献
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常压热水锅炉在国内已有广泛的应用,但常压热水锅炉房目前尚无权威的设计布置方法,而导致安全事故常有发生。在这种锅炉的布置中必须有通大气管和锅炉热水箱。循环热水泵应设于锅炉的出口。在循环热水泵选型时,其压头应为热用户与锅炉房的高程差及管网阻力之和,回水管路上必须设启闭网和阻力调节阀。常压锅炉的节能特性应视热水管网的构成情况具体分析。这种锅炉大体上用在低层、低参数、小容量的场合较为合适。 相似文献
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青藏线太阳能热水供热系统的经济性分析 总被引:2,自引:0,他引:2
运用灰色物元法对太阳能热水供热系统与几种常规能源热水供热系统进行经济性比较 ,分别从初投资、年经营费、安全性、环境影响、技术先进性、操作管理等六个方面进行了定量对比分析。通过建立灰色物元矩阵、满足度函数、确定关联度、确定各评价指标权重等最终确定了最优方案 ,为工程方案的确定提供了理论依据 相似文献
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Performance improvement of existing 200 litres capacity natural convection type domestic solar hot water system is attempted.A two-stage centrifugal pump driven by a vertical axis windmill having Savonius type rotor is added to the fluid loop.The windmill driven pump circulates the water through the collector.The system with necessary instrumentation is tested over a day.Tests on Natural Circulation System(NCS)mode and Wind Assisted System(WAS)mode are carried out during January,April,July and October,2009.Test results of a clear day are reported.Daily average efficiency of 25-28% during NCS mode and 33-37% during WAS mode are obtained.With higher wind velocities,higher collector flow rates and hence higher efficiencies are obtained.In general,WAS mode provides improvements in efficiency when compared to NCS mode. 相似文献
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Two systems are discussed which involve the use of solar energy to supply domestic hot-water requirements and their usefulness in Ireland is examined. the systems are evaluated for thermal performance and cost-effectiveness but the use of a computer simulation model of a system involving a typical commercially available solar panel. It is shown that such systems may be economically justified when compared with electricity, but only if the water supply is directly heated by solar panels and only if the installed cost of such panels is low. Further, it appears that the system performance is relatively insensitive to the panel orientation and consequently that retro-fit installations on existing houses are unlikely to cause difficulties. 相似文献
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针对空气源热泵冷热水机组在高温及低温环境下系统压缩机转速不匹配、系统性能衰减严重等问题,搭建了低压补气型空气源热泵冷热水机组实验台,结果表明:在43 ℃高温环境下,压缩机转速由3000升高到4500 r/min过程中,排气温度升高幅度为5.0%~11.5%,系统制冷量升高幅度为3.1%~26.9%,压缩机功率升高幅度为9.6%~11.4%;压缩机转速为3500 r/min时,制冷系数COPc达到最大值3.20。在-10 ℃低温环境下,压缩机转速由3000 r/min升高到4500 r/min过程中,排气温度升高幅度为4.6%~6.9%,系统制热量升高幅度为2.9%~24.7%,压缩机功率升高幅度为10.4%~11.5%;压缩机转速为4000 r/min时,制热系数COPh达到最大值2.98。 相似文献