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A study of the performances of low-temperature heating systems

机译：低温加热系统的性能研究

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In Europe, high energy consumption in the building environment has raised the need for developing low-temperature heating systems both in new buildings and in retrofitting buildings. This paper addressed many different topics related to energy saving in central heating systems with reduced supply temperature and radiant panel heating including floor heating, ceiling heating and wall heating. The paper investigated the performance of these different types of low-temperature heating system using numerical modelling, simulation tools and also site measurements. Thus, energy performance of radiator and radiant floor heating systems connected to a ground-coupled heat pump (GCHP) is compared, as obtained with experimental measurements in an office room. Furthermore, the thermal comfort of these systems is compared and a mathematical model for numerical modelling of thermal emission from radiant floors is developed and experimentally validated. Additionally, a comparative analysis of the energy, environmental and economic performances of floor, wall, ceiling and floor-ceiling heating using numerical simulation is performed. Finally, the energy efficiency of a heat pump in conjunction with a radiator or radiant floor heating system is calculated for different supply, return, and air design temperatures. This study showed that floor-ceiling heating works better than other low-temperature heating systems regarding providing better thermal comfort, lower energy consumption, lower CO2 emission and lower operating cost.
机译：在欧洲，建筑环境中的高能耗增加了对在新建筑物和翻新建筑物中开发低温供暖系统的需求。本文讨论了与中央供暖系统节能有关的许多不同主题，这些问题包括降低供暖温度和辐射板供暖，包括地板供暖，天花板供暖和墙壁供暖。本文使用数值建模，仿真工具以及现场测量研究了这些不同类型的低温加热系统的性能。因此，比较了与地面耦合热泵（GCHP）连接的散热器和辐射地板采暖系统的能源性能，这是在办公室的实验测量中得出的。此外，对这些系统的热舒适性进行了比较，并开发了用于辐射地板热辐射数值模拟的数学模型，并进行了实验验证。另外，使用数值模拟对地板，墙壁，天花板和地板-天花板加热的能量，环境和经济性能进行了比较分析。最后，针对不同的供气，回风和空气设计温度，计算了结合散热器或地板辐射供暖系统的热泵的能效。这项研究表明，就提供更好的热舒适性，更低的能耗，更低的CO2排放量和更低的运营成本而言，地板采暖比其他低温采暖系统更好。

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