重庆地区某工业厂房地表水地源热泵空调系统全寿命周期成本分析及优化
Analysis and optimization on life-cycle cost of surface water source heat pump system in an industrial plant of Chongqing
摘要：
建立了全寿命周期成本（LCC）数学模型，计算分析了该工业厂房分别采用地表水地源热泵系统与常规冷热源系统的LCC值。分析了能耗的组成及特征，地表水地源热泵系统中热泵机组及冷水泵的能耗费用占运行成本的比例较大，分别为76.2%和12.9%。基于LCC分析了不同负荷率下多台机组并联运行时负荷承担方式不同对机组COP的影响，结果显示，在冷水供回水温差、源水侧供回水温差一定的情况下，部分负荷率小于28%时2台机组均匀分担负荷，大于28%时4台机组均匀分担负荷，系统LCC值最小，为2 857.5万元。同时当冷水泵采用变频控制时，系统的LCC值更小，为2 825.9万元。
Abstract：
Establishes a mathematical model of life-cycle cost (LCC), calculates and analyses LCC values of both surface water source heat pump system and conventional heating and cooling systems in the industrial plant. Analyses the composition and characteristics of energy consumption. The results show that the heat pump unit and chilled water pump consume a larger proportion of energy, which are 76.2% and 12.9% of energy consumption of the whole surface water source heat pump system respectively. Based on LCC, analyses the influence of load share mode of multiple parallel units on COP of units in different load rates. The results show that on the condition of the steady temperature differences between supply and return water for both chilled water and the water source, two units share the load evenly when the part-load rate is less than 28%, and four units share the load evenly when the part-load rate is greater than 28%, then the system LCC reaches its minimum value at 28.575 million yuan. Meanwhile, the system LCC reaches even smaller value at 28.259 million yuan when the chilled water pump is under frequency conversion control.
Keywords:industrialplant,surfacewatersourceheatpump,life-cyclecost(LCC),load,chilledwaterpump,frequencyconversioncontrol