Energy revolution: From a fossil energy era to a new energy era

Zou, Caineng; Zhao, Qun; Zhang, Guosheng; Xiong, Bangshu

doi:10.1016/j.ngib.2016.02.001

Cited by 598 publications

(281 citation statements)

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“…As the lost gas volume (vlost) is a negative value in Equation (12), the real lost gas volume (|vlost|) can be derived in Equation (13) by taking absolute value of the lost gas volume. (13) where t loss is the total gas loss time in minutes; t equi is the gas loss time during core lifting in minutes, which means the time from the pressure equilibrium point to the ground; t expo is the exposed ground time, from when shale is lifted to the ground to when shale is loaded into the degassing canisters; t dega is the cumulative degassing time during on-site shale degassing experiments in minutes; t lift is the core lifting time in minutes; h core is the depth of core in meters; h equi is the depth of pressure equilibrium point in meters; F is the velocity of core lifting in m/s; ρ water is the density of water in kg/m 3 ; ρ mud is the density of drilling mud in kg/m 3 ; k is the formation pressure coefficient; g is the acceleration of gravity, take 9.8 m/s 2 ; v dega is the cumulative degassing shale gas volume in m 3 ; v lost is a negative value of the lost gas volume in m 3 ; |v lost | is the real lost gas volume in m 3 ; and a is a constant. We can use Equation (11), Equation (13) and Figure 5 to analyze the difference between the improved USBM method and the USBM method.…”

Section: Improved Usbm Methodsmentioning

confidence: 99%

Shale Gas Content Calculation of the Triassic Yanchang Formation in the Southeastern Ordos Basin, China

Shen

Hao

et al. 2017

Energies

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Shale gas content is the key parameter for shale gas potential evaluation and favorable area prediction. Therefore, it is very important to determine shale gas content accurately. Generally, we use the US Bureau of Mines (USBM) method for coal reservoirs to calculate the gas content of shale reservoirs. However, shale reservoirs are different from coal reservoirs in depth, pressure, core collection, etc. This method would inevitably cause problems. In order to make the USBM method more suitable for shale reservoirs, an improved USBM method is put forward on the basis of systematic analysis of core pressure history and temperature history during shale gas degassing. The improved USBM method modifies the calculation method of the gas loss time, and determines the temperature balance time of water heating. In addition, we give the calculation method of adsorption gas content and free gas content, especially the new method of calculating the oil dissolved gas content and water dissolved gas content that are easily neglected. We used the direct method (USBM and the improved USBM) and the indirect method (including the calculation of adsorption gas, free gas and the dissolved gas method) to calculate the shale gas content of 16 shale samples of the Triassic Yanchang Formation in the Southeastern Ordos Basin, China. The results of the improved USBM method show that the total shale gas content is high, with an average of 3.97 m 3 /t, and the lost shale gas content is the largest proportion with an average of 62%. The total shale gas content calculated by the improved USBM method is greater than that of the USBM method. The results of the indirect method show that the total shale gas content is large, with an average of 4.11 m 3 /t, and the adsorption shale gas content is the largest proportion with an average of 71%. The oil dissolved shale gas content which should be paid attention to accounts for about 7.8%. The discrepancy between the direct method and indirect method is reduced by using the improved USBM method, and the improved USBM method could be more practical and accurate than the USBM method.

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Section: Improved Usbm Methodsmentioning

confidence: 99%

Shale Gas Content Calculation of the Triassic Yanchang Formation in the Southeastern Ordos Basin, China

Shen

Hao

et al. 2017

Energies

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“…One of the major concerns of the society nowadays is the rise in demand of energy and burning up of fossil fuel . It was only a century ago in which we realized the importance of renewable energy and adverse effects of the excessive utilization of hydrocarbons including fuels, amongst which global warming is of the highest concern .…”

Section: Introductionmentioning

confidence: 99%

Geothermal and solar energy–based multigeneration system for a district

et al. 2019

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Summary In this study, parabolic trough collector with an integrated source of geothermal water is used with regenerative Rankine cycle with an open feedwater heater, an electrolyzer, and an absorption cooling system. The absorption fluids used in the solar collectors were Al2O3‐ and Fe2O3‐based nanofluids. Detailed energetic and exergetic analyses are done for the whole system including all the components. A comparative analysis of both the used working fluids is done and plotted against their different results. The parameters that are varied to change the output of the system are ambient temperature, solar irradiance, the percentage of nanofluids, the mass flow rate of the geothermal well, the temperature gradient of the geothermal well that had an effect on the net power produced, and the outlet temperature of the solar collector overall energetic and exergetic efficiencies. Other useful outputs by this domestic integrated multigeneration system are the heating of domestic water, space heating (maintaining the temperature at 40°C‐50°C), and desalination of seawater (flash distillation). The hydrogen production rate for both the fluids diverges with each other, both producing average from 0.00490 to 0.0567 g/s.

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“…It is necessary to implement energy conservation and emission reduction, develop new energy sources, and promote green sustainable development [1]. Global energy is transforming into an efficient, clean, and diversified sector, and the energy supply and demand pattern is shifting from traditional energy to new energy [2]. New energy generally refers to renewable energy that is developed and utilized on the basis of new technologies, including nuclear energy, hydro power, wind energy, solar energy, bioenergy, and tidal energy [3].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Evaluation of the New Energy Power Generation Development at the Regional Level: An Empirical Analysis from China

2019

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In order to build an environment-friendly society and realize the coordinated allocation and effective utilization of resources and finally achieve China's energy supply security, it is imperative to vigorously develop new energy sources. This study establishes a four-level new energy power generation (NEPG) development index system from multiple dimensions. Taking the installed capacity and generating capacity of China's NEPG in 2016 and 2017 as samples, we used the improved entropy method, to analyze the development of different types of NEPG among 31 provinces from three aspects: absolute value, relative value, and incremental value. Finally, we comprehensively evaluated the NEPG development in each province. The empirical analysis shows that the spatial distribution of NEPG development in China is uneven, the growth rate is different, the development gap is obvious, and the development efficiency is quite different.Energies 2019, 12, 4580 2 of 15 China, it is necessary to improve the regional development of new energy, prioritize the development of new energy sources, and promote the sustainable development of resources and the environment as the overall tone of current resource and economic development [8]. Literature ReviewSince the United Nations Conference on New Energy and Renewable Energy was held in 1981, countries around the world have paid more and more attention to new energy [9]. In September 2015, new energy was listed as one of the UN's sustainable development goals [10]. Domestic and foreign researches on the development of NEPG mainly focuses on three aspects: The first is the influencing factors and policy researches on the development of NEPG; as human beings ignore environmental protection while developing the economy [11], improving relevant policies can promote the development of NEPG [12], which can effectively reduce carbon dioxide emissions [13]. The second is the innovation and development of NEPG technology. Technological innovation plays an effective role in the development of NEPG [14], especially in underdeveloped countries and regions [15]. The third is the trend and significance of the development of NEPG. Traditional energy sources are facing problems such as resource depletion and environmental pollution, and new energy sources can be the best alternative [16]. Since 2000, China's power demand has soared, but power generation efficiency is low [17]. The development of NEPG has become the main focus of China's energy policy [18].The assessment of the development of traditional energy power generation and its impact on the environment economy has been the focus of experts at home and abroad. For example, the spatial correlation model of the economy-energy-pollution phase analyzes the effect of river water as a link between production area and urban living space [19]. The socioeconomic status and energy environment of countries are studied through the energy and environment coupling coordination model [20]. In the energy-economy model, advanced technology has played a decisive rol...

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Energy revolution: From a fossil energy era to a new energy era

Cited by 598 publications

References 2 publications

Shale Gas Content Calculation of the Triassic Yanchang Formation in the Southeastern Ordos Basin, China

Shale Gas Content Calculation of the Triassic Yanchang Formation in the Southeastern Ordos Basin, China

Geothermal and solar energy–based multigeneration system for a district

Comprehensive Evaluation of the New Energy Power Generation Development at the Regional Level: An Empirical Analysis from China

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