关于闭环地热系统在高地热梯度场外发电的局限性
Sri Kalyan Tangirala1,2, Víctor Vilarrasa3
1Global Change Research Group (GCRG), IMEDEA-CSIC-UIB, Esporles, Spain. srikalyan.tangirala@csic.es.
Communications engineering
|July 1, 2025
概括
闭环地热系统 (CLGS) 不适用于发电. 高流量导致快速冷却,大大降低生产温度和经济可行性,即使在广泛的钻井.
科学领域:
- 地热能源工程 地热能源工程
- 储水库工程 储水库工程
- 可持续能源系统 可持续能源系统
背景情况:
- 闭环地热系统 (CLGS) 为传统地热能源开采提供了替代方案.
- 据了解,CLGS的目标是利用钻孔大小的平行侧面进行流体循环,绕过断裂网络.
- 基于CLGS可扩展性的要求,吸引了大量投资,用于供暖和电力.
研究的目的:
- 评估CLGS用于发电的物理限制和经济可扩展性.
- 为了确定流量对CLGS生产温度的影响.
- 根据各种操作参数评估CLGS的成本效益.
主要方法:
- 使用数值模拟来建模CLGS性能.
- 分析的重点是侧向流量和岩石基质冷却之间的关系.
- 通过将终身成本与预计收入进行比较来评估经济可行性.
主要成果:
- 在CLGS侧面的高流量导致周围岩层的快速冷却.
- 随着流量增加,生产温度急剧下降.
- 即使有30个多边和75公斤/秒的生产在180°C,收入无法覆盖终身成本.
结论:
- 由于高流量时的热吸收,CLGS面临着一个基本的物理限制.
- 减轻这种限制的成本 (例如,钻探多边) 太高了.
- 对于独立发电目的来说,CLGS在经济上是不可扩展的.
更多相关视频
10:19A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function
Published on: November 21, 2015
11.6K
07:40A Gusseted Thermogradient Table to Control Soil Temperatures for Evaluating Plant Growth and Monitoring Soil Processes
Published on: October 22, 2016
12.0K
相关概念视频
Energy Line and Hydraulic Gradient Line
1.4K
Based on Bernoulli's equation, the energy line (EL) and hydraulic grade line (HGL) provide graphical representations of energy distribution in a fluid flow system. For steady, incompressible, inviscid flows, Bernoulli's equation is expressed as:
1.4K
Induced Electric Fields: Applications
1.9K
An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
1.9K
Divergence and Curl of Electric Field
6.2K
The divergence of a vector is a measure of how much the vector spreads out (diverges) from a point. For example, an electric field vector diverges from the positive charge and converges at the negative charge. The divergence of an electric field is derived using Gauss's law and is equal to the charge density divided by the permittivity of space. Mathematically, it is expressed as
6.2K
Equipotential Surfaces and Conductors
3.7K
For a conductor in which all charges are at rest, the conductor's surface is equipotential. The electric field is always perpendicular to equipotential surfaces. Therefore, in a conductor with static charges, the electric field just outside the conductor is always perpendicular to the conductor's surface. Any tangential component of the electric field will cause charges to move inside the conductor, which will violate the electrostatic nature of the system. In an electrostatic...
3.7K
Control System Problem
177
In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
177
Control of Power Flow
317
There are several methods to control power flow in power systems:
317
