Investigation on Heat Transfer Properties of Supercritical Water in a Rock Fracture for Enhanced Geothermal Systems

Investigation on Heat Transfer Properties of Supercritical Water in a Rock Fracture for Enhanced Geothermal Systems
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增强地热系统岩石裂缝中超临界水传热特性的研究

DOI:
10.1007/s10765-018-2455-3
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发表时间:
2018-10
影响因子:
2.2
通讯作者:
Li Xiaochun
Li Xiaochun
中科院分区:
工程技术4区
文献类型:
--
作者:
He Yuanyuan;Bai Bing;Li Xiaochun

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超临界水(SCW)已被证明是一种从干热岩石(HDR)中提取热量的工作流体,但仍需要对其在HDR裂缝中的传热特性进行基础研究。一个二维的传热模型,认为可变的热物理特性进行了更新,数值研究的质量流量,热储温度,和裂缝孔径大小的SCW流通过一个单一的HDR裂缝的传热特性的影响。在相同条件下,比较了超临界CO2和超临界水的传热性能。结果表明,在高温高压条件下,超临界水的传热性能优于超临界CO2的上级传热性能。在HDR开发过程中,必须综合热储温度和压力、场地条件和传热流体。
Supercritical water (SCW) has shown promise as a working fluid to extract heat from hot dry rock (HDR); however, fundamental research on its heat transfer characteristics in HDR fractures is still required. A 2D heat transfer model that considers the variable thermophysical properties was updated to numerically investigate the effects of mass flow rate, thermal reservoir temperature, and fracture aperture size on the heat transfer characteristics of SCW flow through a single HDR fracture. The heat transfer performance of SCW and supercritical CO2(scCO2) was compared under the same conditions. The results indicate that the heat transmission performance of SCW is superior to scCO2at high temperature and high pressure. It is essential to synthesize the thermal reservoir temperature and pressure, site conditions, and heat transmission fluids during HDR development.
DOI: 10.1007/s12665-016-6249-2
发表时间: 2016-11
影响因子: 2.8
作者:
B. Bai;Yuanyuan He;Xiaochun Li;Shaobin Hu;Xiaoxue Huang;Jun Li;Jia-ling Zhu
通讯作者: B. Bai;Yuanyuan He;Xiaochun Li;Shaobin Hu;Xiaoxue Huang;Jun Li;Jia-ling Zhu
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