Application of model based predictive control for water-based floor heating in low energy residential buildings

A model based predictive control method is applied in order to determine the optimal supply fluid temperature in the case of concrete embedded water-based floor heating in low energy residential buildings. The aim of the control is to keep the indoor temperature within a defined comfort interval. The forthcoming supply fluid temperature is obtained through a numerical optimisation based on a prediction of the upcoming heat demand. The elementary response function, which is the basis for the method, is obtained from a numerical control volume model, and as an alternative, from a simplified 2-node lumped model. The accuracy of the results obtained from the simplified model is surprisingly good in comparison to the detailed numerical model. The control method is applied for a single room for which a perfect prognosis of the heat demand exists. The results show a fairly steady optimised supply fluid temperature.     

浅谈低温热水地板辐射采暖

介绍了低温热水地板辐射采暖的特点，对低温热水地板辐射采暖的设计及施工要点进行了阐述，提出了低温热水地板辐射采暖的精品策划。     

低温热水地板辐射供暖系统施工技术

着重介绍了低温热水地板辐射供暖系统的特点、构造、施工工艺、成品保护,同时也对施工出现的问题及解决办法进行了说明,以指导同类工程施工,从而保证供暖系统施工质量。     

热水地面供暖与散热器分户计量供暖对比分析

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。     

低温热水地板辐射供暖系统设计中的若干问题

强调了系统的应用条件，给出处理散热量折减、房间过热的方法，认为应对采用低温热水地板辐射供暖系统的建筑的热工条件提出更具体的要求。     

低温热水地面辐射采暖设计应注意的问题

就低温热水地面辐射采暖系统设计中室内温度偏高、地面温度偏高、地面温度分布不均匀、加热管选择不当等问题的产生原因作了分析,同时提出相应的解决办法,以改善人们的居住或办公环境条件。     

低温热水地板辐射供暖系统的运行调节

根据其传热特点和敷设方式，建立了低温热水地板辐射供暖系统的传热模型，并编制了计算软件，利用软件分析了系统的热工性能及系统运行调节的基本规律。     

低温地板辐射采暖和地热水供热的综合利用

针对北方地区冬季采暖实际使用情况,通过陕西咸阳一房地产开发项目,论述了低温地板辐射采暖和地热水供热在住宅开发中的综合利用,指出低温地板辐射采暖系统与地热井供热综合利用可达到高效节能的效果。     

Floor heating and cooling combined with displacement ventilation: Possibilities and limitations

Design guidelines envisage that floor heating can be used together with displacement ventilation (DV), provided that the supply air is not overly heated before it can reach heat and contaminant sources. If this is not controlled a mixing flow pattern could occur in the room. The use of floor cooling with DV is also considered possible, although draught risk at ankle level and vertical air temperature differences must be controlled carefully, because they could increase.Few studies on these topics were found in the literature.An indoor environmental chamber was set up to obtain measurements aimed at analysing the possibilities and limitations of combining floor heating/cooling with DV. Air temperature profiles, air velocity profiles, surface temperatures and ventilation effectiveness were measured under different environmental conditions that may occur in practice. These values were compared to equivalent temperature measurements obtained using a thermal manikin.The measurements show that floor heating can be used with DV, obtaining high ventilation effectiveness values. A correlation between the floor heating capacity and the air temperature profile in the room was found. Measurements showed that floor cooling does not increase draught risk at ankle level, although it does increase vertical air temperature differences.     

低温热水地板辐射供暖的优点及施工要点

主要介绍了低湿热水地板辐射供暖具有适合低品位能源,室内温度 芬布合理,热力稳定性好,热舒适性好,节能卫生,不占使用面积、无噪音,无污染,管理方便,维修量等优点,对管道的铺设要求和施工方法步骤、施工十要点等进行了论述。指出严格按图纸要求进行试压及调试进行施工是非常必要的。     

低温热水辐射采暖系统的安装体会

对以改性聚丙烯管为管材的低温热水辐射采暖方式进行了系统分析。在介绍材料性能、采暖构造的基础上，提出了安装方法和质量控制要求，为低温热水地板辐射采暖技术的应用提供了保障。     

浅议低温热水地板辐射采暖

介绍了地暖的起源与发展，结合地暖的工作原理，分别阐述了采暖的热源类型、优点、缺点，并与传统供暖方式进行了比较，指出低温热水地板辐射采暖节能降耗，美观隔声，实用性强，健康舒适，具有广泛的应用前景。     

低温地板辐射采暖的分析

低温地板辐射采暖,用交联聚乙烯管(XLPE)、聚丁烯管(PB)等新型建材布置在楼(地)面结构层形成闭路盘管.它利用辐射原理与流体因加热上升的原理,保证人体活动空间的温度要求.地板辐射采暖节能,舒适,不占房间有效面积.此技术在发达国家已得到比较广泛的应用.随着人们对生活环境舒适程度要求的提高,近些年来低温地板辐射采暖在我国有较快的发展.     

低温热水地板辐射采暖在住宅中的应用

简述低温热水地板辐射采暖的发展状况、技术原理、构造、特点和施工方法,分析了地板供暖的优缺点,指出地板供暖技术在各类房屋及住宅中的应用前景。     

低温热水地板辐射供暖工程施工

介绍了低温热水地板辐射供暖技术的优点及其施工组织,阐述了该技术的施工工艺流程及施工过程中各环节的注意事项,指出施工中存在的问题并提出对策,以期促进该供暖技术的发展和应用。     

Uneven gridding of thermal nodal networks in floor heating simulations

In this paper, the use of an uneven nodal network in floor heating simulation with finite difference heat balance method is examined. Two floor heating test cases, homogenous and multilayer floor, are presented. Temperature distributions on the floor surface and heat flows through the floor surface are simulated with even and uneven gridding approaches. It is shown that the total number of nodes can be reduced by placing the densest gridding in sections where the curvature of the temperature gradient is steepest.     

浅谈低温热水地板辐射供暖设计及施工

论述了地面辐射采暖的特点,就其管材要求、构造、施工、调试及验收等作了详细介绍,以积累地板辐射供暖的工程经验,促进地板辐射供暖技术在工程中的应用。     

低温地板辐射采暖在住宅工程中的应用

介绍了低温地板辐射采暖的特点、工艺原理及施工操作要点并做了技术经济分析。由技术经济分析可看出,与其它采暖方式比较,地板辐射采暖技术一次性投资较高,使用期费用要比其它方式低,并且具有提高居住舒适度、可分户分室控制、不占空间使用面积及减少楼层噪音等优点,因此低温地板辐射采暖是一种很有发展前途的采暖方式,适当的施工操作方法及质量控制是该技术成功应用的保障。     

谈采暖散热器的发展

对新发展的钢制散热器的特点和优势进行了分析，从国家的产业政策、国内外市场和城镇住宅方面对散热器提出了性价比的高要求，论述了散热器的发展方向。