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中文摘要：
针对开式地表水源热泵系统，建立了应用于工程评价的简化的寿命周期成本（LCC）计算模型．采用Dest—C对某工程实例进行全年能耗模拟，根据结果分析负荷需求特性，结合机组及水泵的性能曲线，进行系统LCC值分析．将开式地表水源热泵系统与常规冷热源系统组成LCC的各项成本进行比较，得出开式地表水源热泵系统LCC的影响因素主要为设计取水温度、排放水温度和取水高差．通过对以上问题的分析，探讨了优化系统的措施．在取水温度为24℃时，取水泵定温差变频运行，通过拟合曲线得到最佳取水温差为7．7℃，对应的最小LCC为441．80．另外，考虑机组变工况运行情况，得到了更小的LCC值为433．50，说明变工况运行能进一步产生节能效益．
英文摘要：
A simplified life cycle cost （LCC） calculation model, which can be applied in project evalua- tion of open-loop surface water source heat pump system, was set up. Dest-c was used to do the annual en- ergy consumption simulation for an engineering example, and the load demand was analyzed according to the model simulation results and combined with the performance curve of water source heat pump unit and variable frequency pump to calculate the LCC. The results show that water intake temperature, water drainage temperature and height difference between water intake and water drainage are the main factors which influence the LCC of open-loop surface water source heat pump system. By analyzing the above problems and through a further discussion on the measures of system optimization, a conclusion is drawn that, when the water intake temperature is 24℃, the best temperatiare difference between water intake and drainage is 7.7 ℃ under the operation condition of the constant temperature difference, while the minimum LCC is 441.80. In addition, taking into account the unit variant operation to improve the comprehensiveenergy efficiency of the system, a smaller LCC of 433.50 is obtained, demonstrating that the unit variant operation can further promote energy saving benefit.
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