共查询到20条相似文献,搜索用时 0 毫秒
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介绍了地板辐射采暖系统形式及特点,并根据实际工程施工对常规供热系统和该系统的施工工艺与材料选择进行了经济技术分析,从而为地板辐射采暖系统施工及应用提供了实践依据. 相似文献
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对电热地暖系统进行了介绍,阐述了电热地暖系统的原理、特点及经济性。指出电热地暖系统在未来的供暖工程中具有潜在的发展前景。 相似文献
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长期以来,北方地区采暖以燃煤为主.对城市环境造成了较大的污染。而太阳能作为一种清洁的可再生能源.分布范围广,取之不尽,用之不竭。 相似文献
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Stearic acid/silica fume composite as form-stable phase change material for thermal energy storage 总被引:2,自引:0,他引:2
The aim of this research is to prepare a novel form-stable composite phase change material (PCM) for the latent heat thermal energy storage (LHTES) in buildings, passive solar space heating by impregnating of stearic acid (SA) into silica fume (SF) matrix through the technique of solution impregnation. The structure, thermal properties, thermal reliability, thermal conductivity and heat storage or release performance of the composite PCM were determined by scanning electron microscope (SEM), Fourier transformation infrared (FTIR), differential scanning calorimetry (DSC) and thermal cycling test analysis technique. The results show that the form-stable composite PCM has the optimal effect, preventing the leakage of SA from the composite, emerges when the SA and SF mass ratio is 1:0.9. The SA loaded on the matrix surface by physical attraction with the mass ratio of 47% during the preparation process. The latent heat of the composite PCM is measured as 82.53 J/g for the melting process and 84.47 J/g for the freezing process, respectively, which indicate the heat storage ability of composite is connected with the mass ratio of SA in composite. The results of DSC, FTIR and thermal cycling test are all show that the thermal reliability of the composite PCM has an imperceptible change. The increase of thermal conductivity was also confirmed by comparing the melting time, freezing time and phase change time of the composite with that of SA. All of the conclusions indicate that the composite has a better thermal conductivity and good thermal and chemical stability. 相似文献
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介绍了地板辐射供暖在我国的应用情况,分析了地板辐射供暖的利弊得失,详细地阐述了适合于地板辐射供暖的塑料类管材及其正确应用,研究了地板辐射供暖的系统构成和基本构造,以推广地板辐射供暖技术的应用. 相似文献
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A.T. Jones 《Journal of Building Performance Simulation》2017,10(3):313-325
A co-simulation environment, consisting of a detailed mathematical model of a thermal energy storage unit which is incorporated with an EnergyPlus simulation model of a full building HVAC system, is described. The two models are integrated using the user-defined plant component feature in EnergyPlus and the Building Controls Virtual Test Bed (BCVTB) environment. The thermal energy storage unit, which consists of encapsulated phase change material in a series of flat plates and a heat transfer working fluid (water), is modelled using a transient one-dimensional forward finite difference method. The thermal storage model is executed within MATLAB and is verified against experimental data, showing a discharging heat transfer accuracy to within 2.5%. The building model, which incorporates a retrofitted ground source heat pump system within a thermally massive building, is simulated in the EnergyPlus environment. The co-simulation arrangement allows for in-depth analysis of the integrated system under dynamic operating conditions, which is currently not possible within the EnergyPlus environment. Moreover, the overall adopted approach, based on generic integration of a detailed mathematical model, using a third party generalised programming environment, into an established building simulation environment, serves as a successful exemplar for other researchers and practitioners working in the field. 相似文献
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首先总结了近几年建筑节能中相变蓄能技术的研究进展,然后对相变蓄能建筑材料的制备技术和研究方法等进行了概述,并对相变蓄能建筑材料在多功能墙体或地板、智能控温建筑物或混凝土工程及太阳能建筑等方面的应用前景进行了展望,以促进相变蓄能建筑材料的发展。 相似文献
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相变储能墙体材料传热理论与应用研究综述 总被引:1,自引:0,他引:1
分析了相变材料的特点和相变墙体传热理论研究与应用现状,指出了相变墙体材料的研制方向.综述了相变传热的特点和求解方法.指出应通过建立传热理论模型,对不同构造相变墙体在我国不同气候地区的应用进行系统、深入的研究. 相似文献
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从室内空间、加热能力、初投资、动态调节、热舒适性等方面,对比分析了热水地面供暖与散热器供暖存在的差异,指出热水地面供暖具有的一些天然优势,更适宜分户计量供暖的推广。 相似文献
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介绍了低温热水地板辐射采暖的优点,结合工程实例,着重从系统的热媒温度、施工过程、材料选择和成品保护等七个方面,详细阐述了在地暖施工和推广使用中遇到的若干问题,并讨论了相应的解决措施. 相似文献