装配式地面辐射供暖系统散热特性研究

Study on the Heat Dissipation Characteristics of Prefabricated Radiant Floor Heating Systems

本文通过分析装配式地面辐射供暖系统的结构与传热过程,建立了散热计算数值模型,并与实验测试结果对比验证了数值计算结果的可靠性。通过数值模型计算分析了在室内空气计算温度为18℃、供回水平均温度为30~50℃及管间距为150~300 mm条件下不同面层装配式地暖的散热量及热损失量等散热特性。结果表明随着供回水平均温度的增大,装配式地暖的散热量和热损失量呈线性增大,而随着管间距的增大,装配式地暖的散热量和热损失量呈非线性减小。此外,供回水平均温度对不同面层装配式地暖的热损失率影响非常小,而管间距对不同面层装配式地暖的热损失率影响比较大。论文研究结果为装配式地面辐射供暖系统的结构优化及设计选型提供了依据。

This paper established a numerical model for heat dissipation calculation by analyzing the structure and heat transfer process of the assembled floor radiant heating system,and verified the reliability of the numerical calculation results by comparing with the experimental test results.Through the numerical model calculation,the heat dissipation characteristics such as heat dissipation and heat loss of assembled floor heating with different surfaces under the conditions of the indoor air calculation temperature of 18 ℃,the average supply and return water temperatures of 30~50 ℃,and the pipe spacing of 150~300 mm were analyzed.The results showed that the heat dissipation and heat loss of the assembled underfloor heating increased linearly with the rising of the average supply and return water temperatures,while the heat dissipation and heat loss of the assembled underfloor heating decreased non-linearly with the increase of the pipe spacing.In addition,the average supply and return water temperatures had a minor effect on the rate of heat loss for assembled underfloor heating with different surfaces,whereas the tube spacing had a relatively significant effect on the rate of heat loss for assembled underfloor heating with different surfaces.The results of the thesis provide a basis for the structural optimization and design selection of the assembled radiant floor heating system.