| 河北沧县台拱带中、低温地热资源ORC发电与综合梯级利用 |
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| 引用本文：秦祥熙,张萌,叶佳,刘红梅,王贵玲,石建省.2019.河北沧县台拱带中、低温地热资源ORC发电与综合梯级利用[J].地球学报,40(2):307-313. |
| DOI：10.3975/cagsb.2019.011101 |
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| 中文摘要:京津冀地热资源梯级综合开发利用(献县)科研基地大地构造位置位于华北平原沧县台拱带之献县断凸, 利用其地下蓟县系岩溶裂隙热储层热水开展中低温地热发电与综合梯级利用研究。地热发电装机容量 280 kW, 采用ORC向心透平膨胀技术, 系统工质为R245fa。分别于2018年2月4—6日(冬季)、2018年3月6—16日(春季)进行两次试运行, 累计发电时长274 h, 累计发电量36 956 kWh, 平均发电效率9.1%, 最高10.4%。发电效率高于我国已有中低温地热发电项目, 在目前国际中低温ORC地热发电项目中处于较高水平。试运行期间发电机组整体运行效果较好且运行稳定, 冬季地热发电机组运行效果好于春季。科研基地建设完成后, 将进行发电、供暖、地热生态园三级利用, 按照90~95/25℃的地热水热能潜力, 综合发电供暖两级利用计算能源综合利用率将达70%~76%。 |
| 中文关键词:中低温地热资源 地热发电 ORC 地热梯级利用 |
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| ORC Power Generation and Integrated Cascade Utilization of Medium-low Temperature Geothermal Resources in Cangxian Bulge Region, Hebei Province |
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| Abstract:The geotectonic position of Beijing–Tianjin–Hebei Region research base (Xianxian county) is Xianxian county fault arch, formerly Cangxian County uplift, in North China Plain. The research base has studied medium-low temperature geothermal power generation and integrated cascade utilization by using the thermal water in Jxz karst fissures geothermal reservoir. The capacity of the geothermal power generation is 280 kW, ORC centripetal turbine technology is used, and the system working fluid is R245fa. Two test runs were carried out on February 4–6 (in winter) and March 6–16 (in spring) of 2018. The cumulative power generation time was 274 hours, the cumulative power generation was 36 956 kWh, and the average power generation efficiency was 9.1%, with a maximum of 10.4%. The power generation efficiency is higher than that of China's existing low-temperature geothermal power generation projects, and is also at a relatively high level in the current international projects. The generator set worked well and stably during the test run. The geothermal generator operated better in winter than in spring. After the construction of the scientific research base, three levels of utilization of power generation, heating and geothermal ecological parks will be carried out. According to the thermal energy potential of geothermal water at 90~95/25 °C, the comprehensive utilization rate of the two-stage uti-lization of integrated power generation and heating will achieve 70%~76%. |
| keywords:medium-temperature geothermal resources geothermal power generation ORC geothermal cascade utilization |
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