The flow and heat transfer characteristics of compressed air in high-pressure air injection wells

Feng, Naichao; Cheng, Shiqing; Yu, Haiyang; Shi, Wenyang; Liu, Xin; Liu, Qicheng

doi:10.1007/s12517-018-3878-7

Cited by 11 publications

(2 citation statements)

References 52 publications

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“…The government work report and the overview of the national medium and long-term education reform and development plan (2010-2020) mentioned the problems in the quality of higher education and raised them to the national strategic level, which is the quality assurance system of higher education (Cuderman 1986). For a long time, universities have adhered to the reform of moral education and undergraduate education and actively explored the establishment of a highlevel talent training system (Feng et al 2018). With the change of the times, in accordance with the "University Physical Education Curriculum Reform Implementation Plan," we will improve the awareness of sports knowledge, the learning of sports skills, and cultivate sports literacy and increase students' interest in learning sports, so that sports can strengthen the body (Gao et al 2017).…”

Section: R E T R a C T E D A R T I C L Ementioning

confidence: 99%

RETRACTED ARTICLE: Sea level height based on big data of Internet of Things and aerobics teaching in coastal areas

Shao

Xiao-po

2021

Arab J Geosci

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Direct signals from the global navigation satellite system have reflection and scattering effects after passing through the sea level. When the reflected signal and the scattered signal enter the receiver, multipath effects will occur, which will affect the measurement results. Therefore, in navigation and positioning measurement, such signals must be suppressed. With the steady progress of global navigation satellite systems (GNSS) systems, reflected or scattered signals can be used to remotely sense the height of the sea. This altimeter technology is called global navigation satellite system reflectometry (GNSS-R). As a new sea altimeter technology, it can make up for the shortcomings of the high-cost satellite altimeter technology and the narrow range of tides in the previous sea altimeter technology, providing long-term stability and high spatial and temporal resolution signals. As a station altimeter, it is expected to solve the problem of medium-scale sea level altimeters. GNSS-R altimeter technology is one of the research fields that attract the attention of domestic and foreign experts and scholars. As an important part of college physical education curriculum, aerobics plays an important role in guiding students' physical and mental development and improving students' esthetic ability. While comprehensively popularizing high-quality education, the goal of comprehensive training of students has also been achieved. Different from the previous sports aerobics courses, if you want the continuous and diverse development of aerobics, you must continue to promote the reform and optimization of gymnastics guidance, the update of course content, and the guidance methods. In the development of aerobics research and practice, new experiences and social needs will be transformed into education and the quality of education will be improved. This article analyzes the factors that affect the quality of aerobics education in coastal areas and puts forward corresponding countermeasures and suggestions to improve the quality of aerobics education.Keywords Internet of Things . Sea level . Aerobics . Teaching quality This article is part of the Topical Collection on Smart agriculture and geo-informatics

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Section: R E T R a C T E D A R T I C L Ementioning

confidence: 99%

RETRACTED ARTICLE: Sea level height based on big data of Internet of Things and aerobics teaching in coastal areas

Shao

Xiao-po

2021

Arab J Geosci

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“…Furthermore, pressure drop occurs in the compressed air piping system because of friction and flow through bends and valves [12]. Mass flow inefficiencies also decrease the total available pressure in the compressed air system [6].…”

Section: Pressure Requirement Referencesmentioning

confidence: 99%

Using Zero-Waste Baselines to Identify Compressed Air System Inefficiencies in Deep-Level Mines

Merwe

Gous

Schutte

2022

SAJIE

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Inefficient compressed air systems in deep-level mines deteriorate energy performance and increase operational costs. Leaks, wastages, and misuse are common inefficiencies that necessitate an oversupply of compressed air. It is therefore important to identify where the opportunities for improvement are located. Underground mining equipment can be used to develop a zero-waste compressed air demand profile. This profile can then be simulated for the entire operation to determine a theoretical baseline. Noticeable inefficiencies are then identified by comparing the actual data with the zero-waste baselines. The results of this study showed that the surface operations oversupply compressed air by 15% (10 kg/s of air) per day. This requires an additional 80 MWh of electricity (14.5% of the total) and costs approximately R91 000 per day. The comparison with the zero-waste baselines showed that 7.9 kg/s of air is wasted at the underground levels during drilling periods, highlighting the areas that require mitigation projects to improve the performance while decreasing costs and wastages. Keywords zero-waste baseline; compressed air; deep-level mine

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Comments on: The flow and heat transfer characteristics of compressed air in high-pressure air injection wells [Arabian Journal of Geosciences (2018) 11: 519]

Sun

Yao

2018

Arab J Geosci

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The flow and heat transfer characteristics of compressed air in high-pressure air injection wells

Cited by 11 publications

References 52 publications

RETRACTED ARTICLE: Sea level height based on big data of Internet of Things and aerobics teaching in coastal areas

RETRACTED ARTICLE: Sea level height based on big data of Internet of Things and aerobics teaching in coastal areas

Using Zero-Waste Baselines to Identify Compressed Air System Inefficiencies in Deep-Level Mines

Comments on: The flow and heat transfer characteristics of compressed air in high-pressure air injection wells [Arabian Journal of Geosciences (2018) 11: 519]

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