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本文针对能耗模拟软件EnergyPlus中通风系统中的管道换热数学模型,进行了不同工况下的换热计算,通过实验研究了对应工况下的空气温度和热损失功率的实际变化;对EnergyPlus管道换热数学模型进行定量分析,并针对EnergyPlus软件中需使用固定传热系数的特点进行定量运行分析。实验和计算结果表明,EnergyPlus管道换热数学模型在稳定工况下温度变化和热损失功率的计算结果与实际结果接近;而在工况条件变化的情况下则与实际结果相差较大。而EnergyPlus软件中需使用固定传热系数的特点,将导致温度变化和热损失功率的计算结果容易与实际运行的结果差别较大。
In this paper, the mathematical model of heat transfer in the ventilation system of the energy simulation software EnergyPlus is used to calculate the heat transfer under different working conditions. The actual changes of the air temperature and heat loss power under the corresponding working conditions are studied through experiments. Pipeline heat transfer mathematical model was quantitatively analyzed, and quantitative operation analysis was performed for the characteristics of the fixed heat transfer coefficient in the EnergyPlus software. The experimental and calculation results show that the calculation result of the temperature change and the heat loss power of the EnergyPlus pipe heat transfer model is close to the actual result under the stable working condition, but there is a big difference between the actual result and the working condition change. However, the use of a fixed heat transfer coefficient in the EnergyPlus software will result in a temperature difference and heat loss power calculation that is easily different from the actual operating results.