基于不同原理热泵的地热梯级利用技术经济分析

Analysis of Geothermal Cascade Utilization Technology Based on Different Principles of Heat Pump

以实际工程为背景,结合华北某地的地热探井具有水温高、水量大的特点,建立了以内部收益率为评价指标的算例模型,并基于此对压缩式热泵梯级利用系统和吸收式热泵梯级利用系统开展经济性分析。结果表明,在收费率低于80%时,压缩式热泵梯级利用系统因初投资较小,具有更好的经济性;在收费率高于80%时,吸收式地热梯级利用技术运行成本低的特点得以显现,相较于压缩式地热梯级利用技术具有显著的优势。

Based on the actual project and the geothermal resources of a high temperature geothermal exploration well in North China,the method including the internal rate of return as the evaluation index was proposed.The economic analysis of the compression heat pump geothermal cascade utilization system and the absorption heat pump geothermal cascade utilization system were conducted based on the proposed method.The economic analysis result shows that when the space heating charge rate is less than 80%,the compression heat pump geothermal cascade utilization system has lower initial investment and more economical;when the charge rate is higher than 80%,compared with the compression geothermal cascade utilization technology.The absorption geothermal cascade utilization technology should be selected in terms of the lower operation cost.