Nonlinear model-based control of two-phase flow in risers by feedback linearization

Jahanshahi, Esmaeil; Skogestad, Sigurd; Grøtli, Esten Ingar

doi:10.3182/20130904-3-fr-2041.00041

Cited by 11 publications

(8 citation statements)

References 12 publications

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“…Although not close the possibility of competition among SMES was fierce, with the support of the government and the innovation that is done independently, small and medium enterprises will be able to compete in the digital market (Savrul, Incekara, & Sener, 2014). One of the advantages obtained when SMES plunge in the market of e-commerce is the image of the company increased and can bring up the networking marketing with more quick (Jahanshahi, Skogestad, & Grøtli, 2013). With the meaning that digital literacy is a concept that leads to mediation between the technology with the audience or user to practice digital technology in a productive manner, then the movement of digital literacy was designed and organized in various regions.…”

Section: The Best Schemementioning

confidence: 99%

Digital economic literacy micro, small and medium enterprises (SMES) go online

Erlanitasari

Rahmanto

Wijaya

2020

j.info

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Micro, Small and Medium Enterprises (SMEs) have a very vital role in the development and economic growth. In the history of the Indonesian nation's economy, SMEs as a support of the national economy. To make SMEs rise in class, a strategy is needed where one of them is the use of digital economic literacy. Development of digital-based SMEs needs to be done digital literacy so that when SMEs are able to utilize digital technology it will increase revenues by up to 80%. At present, the number of SMEs in Indonesia reaches 62,922,617 units of which the highest number is in the Micro Scale 62,106,900 business units (98.70%) with Small Business 757,090 units (1.20%), and Medium Enterprises 58,627 units (0 , 09%). This research was aimed at toanalyze the Go Online SMEs Movement program launched by the government from 2017 until now, even for the future this program will be launched. The research was conducted with a qualitative content analysis method in which primary data online portal research through the Google search engine. Whereas secondary data were obtained from government publications about the Go Online SMEs Movement program. Research shows that only 36% of SMEs in Indonesia is still struggling with conventional marketing. Meanwhile, 37% of SMEs only have basic online marketing capacity such as computer and broadband access. The remaining 18% of SMEs have medium online capacity because they can use websites and social media. Only 9% have digital marketing capacity that can be categorized as sophisticated. The study recommended the importance of the government conducting intensive socialization of the Go Online SMEs Movement. In fact, it must also be at the level of assistance for SMEs. SMEs must be the main players in the development of the digital economy in Indonesia. Collaboration between government and e-commerce is carried out continuously to make Indonesia the Digital Energy of Asia by 2020.Usaha Mikro, Kecil, dan Menengah (UMKM) memiliki peran yang sangat vital di dalam pembangunan dan pertumbuhan ekonomi. Dalam sejarah perekonomian bangsa Indonesia, UMKM sebagai penopang perekonomian nasional. Untuk menjadikan UMKM naik kelas, dibutuhkan strategi dimana salah satunya adalah penggunaan literasi digital ekonomi. Pengembangan UMKM berbasis digital perlu dilakukan literasi digital sehingga ketika UMKM mampu memanfaatkan teknologi digital akan meningkatkan penerimaan hingga 80%. Saat ini, jumlah UMKM di Indonesia mencapai 62.922.617 unit dimana dari jumlah tersebut terbanyak di Skala Mikro 62.106.900 unit usaha (98,70%) dengan Usaha Kecil 757.090 unit (1,20%), dan Usaha Menengah 58.627 unit (0,09%). Penelitian ini bertujuan untuk menganisis program Gerakan UMKM Go Online yang diluncurkan pemerintah sejak tahun 2017 sampai dengan sekarang, bahkan untuk masa yang akan datang program ini akan terus diluncurkan. Penelitian dilaksanakan dengan metode analisis isi kualitatif dimana data primer penelitian portal online melalui mesin pencari Google. Sedangkan data sekunder didapat dari publikasi pemerintah mengenai program Gerakan UMKM Go Online. Hasil peneitian menunjukkan hanya 36% UMKM di Indonesia masih berkutat dengan pemasaran konvensional. Sedangkan, 37% UMKM hanya memiliki kapasitas pemasaran online yang bersifat mendasar seperti akses komputer dan broadband. Sisanya, sebesar 18% UMKM memiliki kapasitas online menengah karena dapat menggunakan website dan medsos. Hanya 9% saja yang memiliki kapasitas pemasaran digital yang bisa dikategorikan canggih. Penelitian merekomendasikan pentingnya pemerintah melakukan sosialisasi secara intensif mengenai Gerakan UMKM Go Online. Bahkan, juga harus pada tataran pendampingan pada pelaku UMKM. UMKM harus menjadi pemain utama dari perkembangan ekonomi digital di Indonesia. Kolaborasi antara pemerintahan dan e-commerce dilakukan secara kontinyu untuk menjadikan Indonesia sebagai Digital Energy of Asia pada 2020.

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Section: The Best Schemementioning

confidence: 99%

Digital economic literacy micro, small and medium enterprises (SMES) go online

Erlanitasari

Rahmanto

Wijaya

2020

j.info

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“…The author indicates that the solution has the ability to stabilize the unstable riser system at a valve opening that is larger than that achieved with the original (conventional) controller algorithm. Moreover, the linearization closed in a feedback loop in a combination of pressure drop was used in [63] for the control design of the production choke valve to prevent severe slugging flow conditions. Thanks to the authors' solution it was possible to successfully maintain the stability of large valve opening in the experimental rig without the need of re-adjusting it.…”

Section: Flow Controlmentioning

confidence: 99%

Computer methods for non-invasive measurement and control of two-phase flows: a review study

Wajman

2019

ITC

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Nowadays, the application of advanced technologies in modern production systems is the main trend of development and technological progress in many industrial sectors. It is due to the still growing trends of energy-saving and production quality enhancement. Wherever in the production process the phase mixture is transported and it is not optimal or not economic, there is a need to develop a system which would be able to prevent any construction disaster, unexpected production line stopping or situation where for reasons of bad flow parameters, the final product is defective. This paper studies various sensors, measurement techniques and computer methods for signal processing and analysis to diagnose and control two-phase flows. Due to the possibility that the invasive measurement disturbs the process and changes it parameters and behavior especially in the location just after the measurement point and simultaneously does not provide any information about these changes it is unreliable for the diagnosis or control. Therefore, the non-invasive techniques commonly used for measurement of flows parameters are described. Depending on the industrial demands many of applications examples for non-invasive two-phase flows measurement and monitoring are given. This description for identifying the flow parameters is divided into features categories of this phenomena as void fraction distribution, velocity profile and flow regime. However, from these methods the high accuracy and short processing time is expected. The continued observation and monitoring of the process abnormalities can provide valuable information about its dynamic state and allow for real-time and automatic monitoring and control. Therefore, the development of advanced process control is one of the most important challenges to keep the flow regime on the given level and for instant and long-term energy saving, quality improvement.

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“…The slugging phenomena can happen in many different geometric locations in the offshore production process as shown in Figure 12, such as, the slugging flow from the gaslifted production well due to the casing-heading mechanism [7], [22], terrain slugging which is caused by the elevations of the pipeline by following the ground elevation or the sea floors [14], [29], and the most popular riser slugging phenomenon [13], [20], [26], [28], [32], [41]. Extensive research work about modeling and control of slugs can be found in recent decades.…”

Section: A Slugging Flow Patternmentioning

confidence: 99%

“…Instead, we will introduce what's our latest research results in this subject. We refer to [7], [12], [14], [19], [20], [21], [26], [27], [28], [29], [41], [43] and the references therein for some excellent research work. Some of our previous work can be found in [22], [13], [47], [48] and the latest ones in [34], [35].…”

Section: A Slugging Flow Patternmentioning

confidence: 99%

“…Considering that the slugging behavior can be regarded as a kind of limit cycle characteristic of a specific nonlinear system [20], there might be some possibility to introduce a cyclically dynamic controller, such that, by combining with the steady state slugging flow pattern and this dynamic controller, the controlled closed loop system can lead to a stable flow pattern. In this sense, the controller behaviors like an anti-"limit-cycle" control solution.…”

Section: F Dynamic Choking Controlmentioning

confidence: 99%

See 1 more Smart Citation

Cleaning the produced water in offshore oil production by using plant-wide optimal control strategy

Yang

Pedersen

Durdevic

2014

2014 Oceans - St. John's

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To clean the produced water is always a challenging critical issue in the offshore oil & gas industry. By employing the plant-wide control technology, this paper discussed the opportunity to optimize the most popular hydrocyclone-based Produced Water Treatment (PWT) system. The optimizations of the efficiency control of the de-oiling hydrocyclone and the water level control of the upstream separator, are discussed and formulated. Some of our latest research results on the analysis and control of slugging flows in production well-pipeline-riser systems are also presented. The ultimate objective of this research is to promote a technical breakthrough in the PWT control design, which can lead to the best environmental protection in the oil & gas production, without sacrificing the production capability and production costs.

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Nonlinear model-based control of two-phase flow in risers by feedback linearization

Cited by 11 publications

References 12 publications

Digital economic literacy micro, small and medium enterprises (SMES) go online

Digital economic literacy micro, small and medium enterprises (SMES) go online

Computer methods for non-invasive measurement and control of two-phase flows: a review study

Cleaning the produced water in offshore oil production by using plant-wide optimal control strategy

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