共查询到19条相似文献,搜索用时 265 毫秒
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太阳能地板辐射采暖系统的实验与数值模拟分析 总被引:1,自引:0,他引:1
介绍了上海交通大学太阳能实验室的太阳能地板辐射采暖系统的实验情况,通过实验对该系统在连续循环运行模式下对室内热环境所产生的影响进行了研究,并与非采暖房间进行了比较。同时对整个采暖系统建立了数学模型,通过数值计算得到地板表面温度及室内空气温度动态变化,模拟结果与实验基本吻合。 相似文献
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研究一种新型的太阳能主被动复合采暖民居设计,对该系统的运行情况进行系统的实验研究。该系统结合太阳能被动式空气集热器及太阳能炕系统:太阳能炕将太阳能的应用与炕床高效的能量利用相结合,替代火炕提供舒适的睡眠环境;太阳能空气集热系统对日间的室内环境进行加热。实验工作在青海省实地展开,对系统的3种不同工作模式(太阳能炕子系统单独运行、太阳空气集热系统单独运行、太阳能炕系统与太阳能空气集热系统同时运行)进行测试。结果表明,太阳能炕夜间表面温度可保持在27~38℃之间。空气集热系统可提高室内温度4℃。 相似文献
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太阳能供热采暖技术讲座(6) 太阳能供热采暖系统的设计(下) 总被引:2,自引:0,他引:2
<正>五控制系统设计太阳能供热采暖系统控制应包括太阳能集热系统运行控制、辅助热源运行控制、供热系统运行控制、防冻保护控制、防过热保护控制及运行工况的切换。控制系统依据温度、压力和水位传感器获得的信号控制水泵、阀门的启闭或改变阀门的开度,此外系统一般设置温控阀、压力控制阀、自动排气阀、止回阀、安全阀等控制元件以保证系统安全、稳定运行。 相似文献
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针对传统Trombe墙冬季供热效率不高、夏季过热等问题,提出一种高效双通道型Trombe墙系统,对该系统在冬季时的热性能和采暖效果进行实验研究。结果表明,高效双通道型Trombe墙热效率是传统Trombe墙的1.6~3.4倍,室内温度相比于传统Trombe墙可升高0.7~5.7 ℃。其中,当总通道厚度为0.5 m,外通道为0.2 m,隔热板形状为凹凸板时热效率最高为31%,此时室内温度可达21.7 ℃。此外,在实验研究基础上建立高效双通道型Trombe墙的传热模型,并验证其准确性。 相似文献
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带有透明蜂窝太阳房的模拟计算 总被引:3,自引:2,他引:3
对一种新型带有透明蜂窝府能墙式太阳房进行了模拟计算。该房在透明隔热系统与储能墙之间高有一层薄金属吸热板,室内空气借助风机在吸热板与储能墙夹层中流动,空气受热后,将一部份能量加热储能墙,另一总份由它自身传入室内。模拟计算表明,该太阳房具有良好的热性能,且克服了传统Trombe墙的积灰,热惯性大及热损大等缺点。 相似文献
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设计了被动式太阳房的通用数值模拟程序FXD-PASOL。该程序可直接用于直接受益式,Trombe墙式,花格墙式被动太阳房以及它们的任意组合系统的瞬态热工性能模拟,灵敏度分析气象参数变化影响的分析、设计参数最佳化研究以及系统的性能评价等。 相似文献
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几种集热-贮热墙式太阳房的动态模拟及热性能比较 总被引:15,自引:3,他引:12
被动式太阳房的结构对其热性能具有重要影响,采用一维热网络模型对多种结构的太阳房进行了动态模拟,研究了吸热面的热辐射性质,厚墙墙体材料的热物性,不同的透明覆盖以及在透明覆盖与厚墙之间增设金属吸热板等不同结构对太阳房热性能的影响,计算结果为厚墙式被动太阳房的结构设计与材料选取提供了有益的参考。 相似文献
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针对接触型和分隔型多孔介质太阳能集热组合墙系统,分析了太阳辐射及环境温度变化时,组合墙内传热与流动变化.多孔介质太阳能集热组合墙中,多孔介质起半透明隔热体和蓄热体的作用.多孔介质集热层的孔隙率、粒径、材料热导率和多孔介质集热层在组合墙中的位置对系统的采暖效果影响较大. 相似文献
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The laboratory LAMTI has worked for several years on the study and the optimization of the thermalperformances of passive solar walls like solar Trombe wall.These components of the buildings envelope havevery complex behaviour because they are the seat of various coupled heat transfers modes and are subjected to therandom variations of the meteorological parameters.Using the finite difference method(FDM)and starting fromexperimental results recorded during several years,a simulation model was developed and validated concerningthe"composite"Trombe wall.In order to make this work more accessible to the community of the heat engineers,it appears interesting to build a simulation model which can be integrated into the library of elements of theTRNSYS software.A"Type"was thus carried out and the results obtained compared with those of the FDMmodel.In this work we compare the obtained results with these two numerical ways.The assumptions and theresults of simulations are also confronted with those of an existing module in TRNSYS(Type 36)established forthe"classical"Trombe wall.The study shows that the models that we developed are very precise and that certainassumptions must be used with a lot of precautions.The advantages of the composite Trombe solar wallcompared to the Classical Trombe wall are highlighted for cold and/or cloudy climates. 相似文献
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太阳能吸热器换热管蓄热数值模拟与试验研究 总被引:2,自引:0,他引:2
对以高温共晶盐LiF—CaF2为相变材料(PCM)和以干空气为工质的相变蓄热系统,采用焓方法建立了以控制体单元为对象的单管相变蓄热模型,并对系统进行了数值分析,得到了循环工质气体出口温度、相变材料容器最高温度和平均壁温等参数的瞬态变化曲线,实验研究了吸热器换热管的蓄傲热性能,分析了工质进口温度、输入热流级工质流量对工质出口温度、PCM容器平均壁温及最高壁温的影响。计算结果和试验表明单元换热管的蓄傲热性能达到了设计要求,试验结果与数值计算吻合良好。 相似文献
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The computer simulation is a useful tool for heat transfer analysis of the passive solar systems especially in preliminary performance evaluation, implementation, and/or optimization of the system configurations in the course of the development and constructive design. The present article describes advantages and conditions of an application of the simulation scheme to the passive solar system analysis, along with design criterion and requirements for analytical heat transfer models for the passive solar system simulations. A state-of-the-art program, ESPAR, used for the simulations, has been developed for the elementary heat transfer analysis of the passive solar systems constructed as a part of a single room residential building, and formulated around a finite differential heat conductive model combined with typical passive solar system submodels. Analytical results by ESPAR for the direct gain system with sensible or latent heat storage wall and Trombe wall system are presented comparatively with measured results. 相似文献
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太阳能集热组合墙系统的耦合传热与流动分析 总被引:1,自引:0,他引:1
针对太阳能集热组合墙系统,分析了太阳辐射及环境温度变化时,组合墙内传热与流动变化。太阳能集热组合墙系统中,多孔介质起半透明隔热体和蓄热体的作用。多孔介质的空隙率、粒径大小对系统的采暖效果影响较大。 相似文献
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Numerical study on a low energy architecture based upon distributed heat storage system 总被引:1,自引:0,他引:1
Basic performance of a hybrid heating system was investigated numerically through several case studies including examinations of effects of PCM as a heat storing materials. A simple test room assuming passive utilization of solar energy was used with a thermal storage wall (Trombe wall) inside it. Unsteady simulation was performed with a CFD code developed by authors. As the outdoor conditions, standardized weather data of Sapporo city, a cold climate district in Japan, were used. In the simulation, the room air was controlled with the heater operations setting the target air temperature at 18 degree Celsius. Simulated results indicate the effectiveness of PCM and suggest the possibility of developing low energy houses with hybrid system introduced in this study. 相似文献