江水源热泵机组年运行能耗预测方法研究

River water source heat pump annual energy consumption prediction method research

在建筑工程的可行性研究阶段,空调系统冷热源的年运行能耗预测是静态投资回收期分析、全寿命周期成本分析中的核心组成部分,是冷热源选型的重要依据之一。然而,在实际项目中通常选用IPLV/NPLV、设计工况COP进行年运行能耗估算,计算结果与实际能耗有较大的误差。在已知建筑设计冷、热负荷的前提下,引入平衡温度概念,采用BIN方法预测不同温度下的建筑负荷,通过参数修正的方式预测江水源热泵机组在部分负荷率情况下功率,将热泵机组功率修正系数的变化函数拟合为水源侧进水温度和负荷侧回水温度的多项式。对长江上游地区江水温度及气象参数进行监测,并建立了江水温度与空气干球温度的数学关系。提出江水源热泵机组年运行能耗预测方法。该方法反映了系统运行的实际特征,且计算过程较为简单,可以在实际工程中应用。

In feasibility study stage of a building projects,annual energy consumption prediction of air conditioning cold heat source is the key point of cold heat source equipments selection.However,IPLV/NPLV and equipment %COP% in design conditions are usually used in real projects.The building load was obtained by introducing the concept of equilibrium temperature and using BIN method in case of building design load is known.Use the modified parameters to calculate power of river source heat pump,and fitting for the enter water temperature and return water temperature of the polynomial.Monitor the water temperature and meteorological parameters on the upper Yangtze River,and establish the mathematical relationship of river water temperature and air dry bulb temperature.Energy consumption prediction method of river source heat pump was proposed base on this theory.This method reflects the actual characteristics of the system,and the calculation process is simple and can be used in engineering applications.