Oil, Gas, and Energy Commons^™

Hair Clip Type Core Lifter For Improving Coring Quality In Complex Formation And Its Ap-Plication, Liao Yuansu, Hu Qifeng, Miao Sai, Chen Haoxi, Zhuo Lianming

Coal Geology & Exploration

Based on the urgent need of accurate exploration of geological anomalous bodies such as collapse columns and small faults in underground coal mines for near-horizontal boreholes coring drilling of leakage formation, the double-wall hydraulic reverse circulation continuous coring technology was proposed, its technical principle and characteristics were analyzed, the matching ø89/42 mm double-wall coring drilling pipes and reverse circulation coring bits were developed. Three near-horizontal coring boreholes were drilled, the functional tests were carried out in a surface mine, the maximum core recovery rate of a single borehole was 83.6%, the maximum roundtrip footage was 69 m and the average …

Challenges Of Electrifying Medium And Heavy Duty Vehicles In California And How These Challenges Can Be Overcome, Tracy Tilley

Master's Projects and Capstones

California is electrifying medium and heavy vehicles (vehicles weighing over 8,500 pounds) to reduce greenhouse gas emissions and provide environmental justice for disadvantaged communities. These vehicles are used for delivery, construction, refuse collection or long haul trucking. The three main challenges of electrification are infrastructure, policy and funding. To address these challenges, policy analysis was used to review California’s policies already in place for electrification of medium and heavy duty vehicles. Comparative analysis was used to look at policies in other countries and environmental programs for strategies to help electrification efforts.

California faces a lack of infrastructure of medium and …

Analysis On The Application Prospect Of Egcs On Ocean-Going Ships, Zhoujun Wang

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Impact Of Ghg Mitigation Regulations On China’S Shipping Industry And Suggestions, Pengfei Song

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Puerto Rico’S Electric Power System: An Analysis Of Contemporary Failures And The Opportunity To Rebuild A More Resilient Grid, Including The Development Of A Utility-Scale Solar Farm On The Island Municipality Of Culebra, Federico Sotomayor

Sustainability and Social Justice

Puerto Rico’s grid was decimated in 2017 after experiencing back-to-back hurricanes – Maria and Irma. Although the hurricanes caused tremendous damage and hardship to the island, it also created the right circumstances for the local energy landscape to transition toward a more resilient and sustainable model. Through an analysis of recent challenges by the local electric utility PREPA, and subsequent fallout from the hurricanes, we see that they now hold a unique opportunity to redeem themselves by taking advantage of catalyzed resources to rebuild a better system. One region that could greatly benefit from an improved and reimagined grid are …

Potential Of Hemp (Cannabis Sativa L.) For Paired Phytoremediation And Bioenergy Production, Hanah T. Rheay, Emmanuel C. Omondi, Catherine E. Brewer

Agricultural and Environmental Sciences Faculty Research

Hemp (Cannabis sativa L.) is a multi-use crop that has been investigated for its potential use in phytoremediation of heavy metals, radionuclides, and organic contaminants, and as a feedstock for bioenergy production. A review of research literature indicates that hemp is a suitable crop for phytoremediation, and a competitive option for bioenergy. Coupling phytoremediation and bioenergy production from a single hemp crop is a potential solution to overcoming the economic constraints of phytoremediation projects. The current challenge is ensuring that the extracted contaminants are not introduced into the consumer marketplace. After several decades of limited research on hemp in the …

The Utilization Of Shared Energy Storage In Energy Systems: Design, Modeling And Optimization, Rui Dai

USF Tampa Graduate Theses and Dissertations

Energy storage (ES) plays a significant role in modern smart grids and energy systems. With the advances of ES technologies, efficiently applying ES to energy systems has become the bottleneck for achieving the benefits of ES. The traditional approach of utilizing ES is the so-called distributed framework in which there is a separate ES for each individual user. Due to the inherent limits in the distributed framework such as cost inefficiency and space limitations, many studies have promoted to utilize a shared ES in energy systems to further exploit the potentials of ES. However, current studies always focus on maximizing …

Profile Of Volatile Organic Compounds (Vocs) From Cold-Processed And Heat-Treated Virgin Coconut Oil (Vco) Samples, Ian Ken D. Dimzon, Grace B. Tantengco, Noel A. Oquendo, Fabian M. Dayrit

Chemistry Faculty Publications

Virgin coconut oil (VCO) can be prepared with or without heat. Fermentation and centrifuge processes can be done without the use of heat (cold process), while expelling involves heat due to friction. Volatile organic compounds (VOCs) from VCO samples prepared using these three methods were collected using solid phase microextraction (SPME) and analyzed using gas chromatography–mass spectrometry (GC-MS). Twenty-seven VCO samples from nine VCO producers were analyzed. The VOCs from refined, bleached, and deodorized coconut oil (RBDCO) were also obtained for comparison. Fourteen compounds were found to be common in more than 80% of the VCO samples analyzed. These included: …

Compliance Assessment Of The National Oil Spill Contingency Plan Of The Philippines On 1990 International Convention On Oil Spill Preparedness, Response And Co-Operation Using Retos, Godofredo Garcia Vagilidad

World Maritime University Dissertations

No abstract provided.

Assessing Oil Spill Management In Senegal Using The Iso 31000 : 2018 Standard As A Risk Management Framework, Abdou Aziz Diouf

World Maritime University Dissertations

No abstract provided.

Analysis Of Oil Tanker Collisions In The Republic Of Korea Using A Hybrid Approach, Byungchurl Ku

World Maritime University Dissertations

No abstract provided.

A Comparative Study Of The Implementation Of Oil Spill Contingency Planning In Promoting Ocean Sustainability And Governance : A Case Study Of Ghana And Canada., Marvin Bang-Gesina Ayoo

World Maritime University Dissertations

No abstract provided.

Mind The Cap : Case Study Of Sulpher 2020 Cap For Vietnam Tanker Joint Stock Company, Tran Hai Au La

World Maritime University Dissertations

No abstract provided.

Corn Stover As Substrate For Biogas Generation And Precursor For Biosilica Production Via Anaerobic Digestion, Akinola D. Olugbemide, Lajide Labunmi, Ikhazuagbe H Ifijen, Damilare I. Ogungbemide

Tanzania Journal of Science

Production of fuels and chemicals from renewable biomass is crucial to sustainability of bio-based economy. In this study, anaerobic digestion of corn stover (CS) was carried out to produce biogas under mesophilic conditions. The study also investigated the potential of corn stover digestate ash as a potential source for biosilica production. A cumulative volume of 930 mL of biogas was produced with methane content of 85.87%. Higher and lower calorific values of biogas were calculated to be 36.30 MJ/m3 and 32.70 MJ/m3, respectively. Calcination of raw CS (RCS) and the digestate (CSD) was carried out at 600 °C for 3 …

The Pca-Logistic Method For Identification Of Water Burst In Nalinhe No.2 Coal Mine, Ji Zhuochen, Ding Xiang, Hou Enke, Pu Zhiguo, Xie Peng

Coal Geology & Exploration

Nalinhe No.2 coal mine is the first pair of large-scale mines in the Nalinhe mining area. The water inrush events occur from time to time due to its own complex hydrogeological conditions and strong disturbance of excavation in the initial stage of production, which has caused serious threat to the mining activity safety. Finding the source of gushing water quickly and effectively is the key to control the mine water disaster. Based on the water quality analysis of main aquifers and goaf water samples in Nalinhe No.2 coal mine, and drawing the piper trilinear nomograph water samples, the hydrogeochemical characteristics …

Method And Practice Of Quality Test After Grouting In Coal Mine Goaf, Liu Xiaoping, Li Shan, Liu Xinxing, Cao Xiaoyi, Wang Yutao

Coal Geology & Exploration

Grouting quality test is the key technology for efficient development and utilization of waste land in the goaf of a coal mine, it is of great significance to evaluate the stability of the site and the safety of construction after goaf management. Based on many engineering practices, this paper summarizes the evaluation method of the qualified standards of the grouting quality and the errors existed in the testing work. The results proved that the quality inspection after grouting is a systematic work. The test method could be optimized according to the characteristics of the construction and grouting design requirements, following …

Expansion Mechanism And Control Measures Of High Concentration Slurry Filling In Cavity Goaf Of Coal Mine, Wu Boqiang, Wang Xiaodong, Zhu Shibin

Coal Geology & Exploration

The filling expansion mechanism and control measures of high concentration slurry in goaf is one of the difficult problems to be solved in the filling treatment of cavity goaf. Based on this, combined with the high concentration slurry transportation and rheological theory, a high concentration slurry filling process model was constructed to reveal its expansion mechanism, the dynamic and resistance calculation methods of filling expansion process were studied, the main influencing factors and control methods of filling accumulation body morphology were determined, and the theoretical results were verified by outdoor filling test.The results show that the the relative error between …

Test Of Near-Horizontal Drilling Hydraulic Reverse Circulation Coring In Leakage Formation, Yang Dongdong, Zhao Jiangpeng

Coal Geology & Exploration

Based on the urgent need of accurate exploration of geological anomalous bodies such as collapse columns and small faults in underground coal mines for near-horizontal boreholes coring drilling of leakage formation, the double-wall hydraulic reverse circulation continuous coring technology was proposed, its technical principle and characteristics were analyzed, the matching ø89/42 mm double-wall coring drilling pipes and reverse circulation coring bits were developed. Three near-horizontal coring boreholes were drilled, the functional tests were carried out in a surface mine, the maximum core recovery rate of a single borehole was 83.6%, the maximum roundtrip footage was 69 m and the average …

Experimental Study On Bearing Characteristics Of Filled Piers In Coal Mine Goaf, Zhu Shibin

Coal Geology & Exploration

The high concentration slurry is poured into the goaf to form filled piers. The bearing capacity of the piers to the superstructure are affected by the overlap size. In order to grasp the influence of the overlap size on the bearing capacity of the overlying rock layer, high concentration slurry was prepared which selected cement as the cementing material, standard sand as the aggregate. 3D printing technology was used to make the mold to produce the overlapped round table samples. The uniaxial compression test was carried out. Test results show that, when the top area and height of each single …

Experiment Of Secondary Fault Information Mining Based On Boundary Element Method, Lu Ziqing, Zhu Shujie, Zhang Xiaowen, Wang Ji

Coal Geology & Exploration

In order to study the development of secondary faults and fracture, a boundary element method (BEM) combined with seismic interpretation of main faults and geo-mechanics is discussed. Firstly, with the Anderson's theory of faulting, the classification of secondary fault tectonic evolution events is improved under the combination of fault and stress; secondly, the stress tensor order reduction and linear superposition principle are applied to simplify the stress and displacement balance equation, and the Monte Carlo method is used to inverse the paleo-stress field. After all, the equilibrium equation of stress, strain and discontinuous displacement is solved to obtain the current …