地板辐射供暖系统应用分析

Application Analysis of Floor Radiant Heating System

本文基于Energy Plus和BCVTB(Building Controls Virtual Test Bed)软件,以上海地区的100 m^2实际住宅为对象,建立了以空气源热泵为热源的地板辐射供暖系统动态模型,其中热泵模型及其控制逻辑由BCVTB软件建立,建筑模型及地板辐射供暖模型由Energy Plus软件建立,2个软件进行实时数据交换,实现对整个系统的模拟。基于此模型,研究了机组功耗与建筑负荷、供水温度之间关系,并比较了热泵供水温度与房间实际需求供水温度的差别,得出了理论上的最优控制策略以及系统的最小功耗,并提出了一种针对实际系统的变供水温度控制策略,即:通过对整个供暖季的模拟,得到房间需求供水温度与环境温度的拟合曲线,并以此来设定每天的供水温度。结果表明,此种控制策略相比传统的整个采暖季节恒定供水温度节能40%以上。

A dynamic model of floor radiant heating system with air source heat pump was developed based on EnergyPlus and BCVTB （Building Controls Virtual Test Bed）, which operates in a 100 m^2 apartment in Shanghai. The heat pump model and its control logic were developed in BCVTB and the building model as well as the floor radiant model was developed in EnergyPlus. The two models exchanged real-time data to realize the whole system＇s simulation. Based on these models, the relationship among unit power consumption, building load and supplied water temperature was studied and the difference of water temperature between supply side and demand side was compared. As a result, the theoretical optimal control and the lowest system power consumption were obtained. What’s more, a control strategy w ith variable supplied water temperature for actual system was proposed the system operation in the whole heating season was simulated and the fitted curve between water temperature demand and outdoor air temperature was obtained so that the supplied water temperature can be set based on outdoor environment. The simulation result shows that the system energy consumption under this control strategy is 40% lower than that under the conditional constant temperature of the supplied water.