Analysis of Cost Reduction Potential of Vertical Bore Ground Heat Exchanger (Final)

Liu, Xiaobing; Polsky, Yarom; Qian, Defeng; McDonald, Josh

doi:10.2172/1474649

Cited by 10 publications

(7 citation statements)

References 10 publications

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“…inner pipe and a 4-in. outer pipe (Liu et al 2018). The circulating water cost is calculated based on the volume of water, and the normalized water cost is 0.0021 yuan per gallon (Liu et al 2018).…”

Section: Optimization Methodsmentioning

confidence: 99%

“…outer pipe (Liu et al 2018). The circulating water cost is calculated based on the volume of water, and the normalized water cost is 0.0021 yuan per gallon (Liu et al 2018). The grout cost is calculated based on the volume of grout used for sealing the outer pipe diameter.…”

Section: Optimization Methodsmentioning

confidence: 99%

“…The grout cost is calculated based on the volume of grout used for sealing the outer pipe diameter. The normalized grout cost is 2.310 yuan per gallon (Liu et al 2018), and the thermally enhanced grout is 7 and 10.5 yuan per gallon (Liu et al 2018).…”

Section: Optimization Methodsmentioning

confidence: 99%

“…Subsequently, we applied three types of grout materials in the simulation to analyze the influences of grout materials. The first one is bentonite-water mixtures with thermal conductivity value of 0.73, the second one is a mix of bentonite and silica sand with thermal conductivity value of 1.73, and the last one is a mix of bentonite and graphite with thermal conductivity value of 2.77 (Liu et al 2018). Furthermore, we designed nine scenarios (#5A-F) to investigate the impact of outer pipe wall thermal conductivity on the heat extraction rate under different geological conditions.…”

Section: Sensitivity Analysis and Simulated Scenariosmentioning

confidence: 99%

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Optimization of the utilization of deep borehole heat exchangers

et al. 2020

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Based on the differences in burial depth, utilization mode, and storage medium, geothermal energy is usually divided into three types: shallow geothermal energy (0-200 m), medium-deep hydrothermal energy (200-3000 m), and hot dry rocks energy (> 3000 m) (Wang 2015). The China Geothermal Energy Development Report released in August 2018 shows that the shallow geothermal energy is the main method used in China for geothermal heating, which has been rapidly developed. The extent of hydrothermal heating is also increasing steadily. However, the development in the utilization of geothermal resources has some difficulties due to the large areas demanding of shallow geothermal energy and the uneven distribution of hydrothermal energy (Kong et al. 2014). Moreover, when utilizing the hydrothermal energy, reinjection of geothermal wastewater must be carried out for maintaining the pressure of geothermal reservoirs (Rybach 2003). However, with a low reinjection rate, reinjection could be quite difficult in sandstone reservoirs (Kong et al. 2014; Su et al. 2018; Ungemach 2003). Therefore, deep-borehole heat exchangers (DBHE) have become an alternative approach to utilize geothermal

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Section: Optimization Methodsmentioning

confidence: 99%

Section: Optimization Methodsmentioning

confidence: 99%

Section: Optimization Methodsmentioning

confidence: 99%

Section: Sensitivity Analysis and Simulated Scenariosmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of the utilization of deep borehole heat exchangers

et al. 2020

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“…The ground heat exchanger (GHE), which is used for heat exchange with the surrounding ground formation, accounts for about 30% of the total installation cost of a GSHP system [9]. The most commonly used GHE in the United States is the vertical bore ground heat exchanger (VBGHE), and the expensive drilling required to create the vertical borehole is the primary factor contributing to the high cost of VBGHE installation [10].…”

Section: Introductionmentioning

confidence: 99%