期刊
ENERGY
卷 114, 期 -, 页码 24-39出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2016.07.153
关键词
Fractured granite reservoir; Electricity generation; Yangbajing geothermal field; Two phase flow; Numerical investigation
资金
- Youth Fund Project of National Natural Science [41504067]
- Joint Fund Project of National Nature Science and Guangdong Province [U1401232]
- Fund Project of Guangdong Natural Science [2014A030308001]
- Key Laboratory of Renewable Energy, Chinese Academy of Sciences [y507k31001]
Deep geological exploration indicates that there is a high-temperature fractured granite reservoir at depth of 950 similar to 1350 m in well ZK4001 in the north of Yangbajing geothermal field, with an average temperature of 248 degrees C and a pressure within 8.01 similar to 11.57 MPa; in this well there mainly produces liquid and steam two-phase flow. In this work we numerically investigated the electricity generation potential from the fractured granite reservoir through a single vertical well, analyzed the process and mechanism of the two-phase flow, and evaluated main factors affecting the heat production and electricity generation. The results show that under the reference conditions the system attains a pump power of 0.02 similar to 0.16 MW, an electrical power of 2.71 similar to 2.69 MW, and an energy efficiency of 68.06 similar to 1634, showing favorable electricity generation performance. During the production period, the bottomhole production pressure gradually decreases, and this makes the pump power increasing and the energy efficiency decreasing. When the bottomhole pressure is lower than the saturated vapor pressure, the liquid water begins to evaporate and the bottomhole wellbore begins to produce the mixture of liquid and steam. Main factors affecting the performance are reservoir porosity, permeability and fluid production rate. Higher reservoir porosity or higher permeability or lower fluid production rate will increase the bottomehole pressure, decrease the pump power and improve the energy efficiency. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据