Economic optimization of enhanced geothermal systems using a fully analytical temperature profile

IF 3.1 4区工程技术 Q3 ENERGY & FUELS

Energy Sources Part B-Economics Planning and Policy Pub Date : 2022-08-02 DOI:10.1080/15567249.2022.2101713

M. Sajjadi, M. Javadi, Zahra Ashoorzadeh, Mohammad Emami Niri

引用次数: 0

Abstract

ABSTRACT In enhanced geothermal systems (EGS), the efficiency of the energy recovery process is highly dependent on the produced fluid’s temperature. In this work, a new analytical scheme is proposed for predicting the spatiotemporal evolution of temperature profile based on the three-dimensional energy conservation equation solved on the vertical plane passing through the wells. The solution is given in an error-function form which suits well for feasibility studies. An economic study is then conducted on the cost of operation based on the analytically described temperature and pressure distribution. The cumulative gain of operation, including the cost of pumping and reduced gain due to thermal breakthrough, is optimized with respect to the well spacing and the water injection rate. Optimum well spacing – injection rate combinations have been obtained for varied project life times. The maximum cumulative gain calculated by this method can be used for capex analyses and project lifetime predictions.

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利用全面分析的温度剖面对增强型地热系统进行经济优化

在增强型地热系统(EGS)中，能量回收过程的效率高度依赖于产出流体的温度。本文提出了一种基于井间垂直平面三维能量守恒方程的温度剖面时空演化预测方法。解以误差函数形式给出，适合于可行性研究。然后，根据分析描述的温度和压力分布，对运行成本进行经济研究。作业的累积收益，包括泵送成本和因热突破而降低的收益，根据井距和注水速度进行了优化。针对不同的项目寿命周期，获得了最佳井距-注入速度组合。通过这种方法计算的最大累积收益可用于资本支出分析和项目寿命预测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy Sources Part B-Economics Planning and Policy ENERGY & FUELS-

CiteScore

6.80

自引率

12.80%

发文量

审稿时长

6-12 weeks

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