Development of a Dynamic Model and Control System for Load-Following Studies of Supercritical Pulverized Coal Power Plants

Sarda, Parikshit; Hedrick, Elijah; Reynolds, Katherine J.; Bhattacharyya, Debangsu; Zitney, Stephen E.; Omell, Benjamin

doi:10.3390/pr6110226

Cited by 33 publications

(31 citation statements)

References 18 publications

(33 reference statements)

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“…Aspen Plus software (Version 8.4, Aspen Technology, Inc., Bedford, MA, USA) contains lots of different physical methods selectively applied to various conditions and materials with diverse characteristics [20][21][22][23][24][25]. In this report, the raw materials are mainly isobutylene, methanol, and air, where the gas phase conforms to Henry's Law of the ideal gas and the gas law, and the liquid phase belongs to a non-ideal system.…”

Section: Thermodynamic Methods Determinationmentioning

confidence: 99%

Design and Optimization of a Process for the Production of Methyl Methacrylate via Direct Methylation

et al. 2019

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Methyl methacrylate (MMA) plays a vital role in national productions with broad application. Herein, the production of MMA is realized by the improved eco-friendly direct methylation method using Aspen Plus software. Three novel kinds of energy-saving measures were proposed in this study, including the recycle streams of an aqueous solution, methacrolein (MAL), and methanol, the deployment of double-effect distillation instead of a normal one, and the design of a promising heat-exchange network. Moreover, MMA with a purity of 99.9% is obtained via the design of a MAL absorber column with an optimal stage number of 11 and a facile chloroform recovery process by using the RadFrac model. Thus, the proposed green process with energy-conservation superiority is the vital clue for developing MMA, and provides a reference for the production of MMA-ramifications with excellent prospects.Processes 2019, 7, 377 2 of 12 design and dynamic control of the simplified separation process for MMA by using a one-column flowsheet with a middle decanter, which can cut operating costs by 35.9% compared to the industrial three-column design. Large disturbances of the feed composition can be effectively controlled [15]. Chang et al. studied an alternative design for separating mixtures (including methyl methacrylate, methanol, and water) using a distillation column, a stripper and a decanter. Compared with the traditional design process, the operating cost of during this improved design significantly reduced to 25.9%. In addition, based on open/closed-loop sensitivity testing, the overall design turns out to ensures the product of MMA with a high degree of purification [16]. The azeotropic distillation and ionic liquid eco-environmental separation of methacrolein (MAL) was investigated by Yan et al. to obtain MMA, and results indicated that used green process had significant economic and green-degree advantages [14]. Compared with related reports, C 4 -IDMM has gradually been regarded as a promising green technique, due to the low-cost equipment, short reaction path, and sufficient raw materials, and so on [12,13,17], though there are no large-scale uses in industry. However, it is still a challenge to develop the production process of MMA based on C 4 -IDMM economically. The method used in our study is based on the improved direct methylation of isobutylene method proposed by the Asahi Kasei Corporation. There is no MAA step during this process, which effectively avoids side reactions such as MAA polymerization, simplifies the process flow, and reduces energy consumption, thereby greatly reducing operating costs and investment costs and making it more competitive.

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Section: Thermodynamic Methods Determinationmentioning

confidence: 99%

Design and Optimization of a Process for the Production of Methyl Methacrylate via Direct Methylation

et al. 2019

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“…Sarda, Hedrick, Reynolds, Bhattacharyya, Zitney, and Omell [12] Load-following Supercritical pulverized coal (SCPC).…”

Section: Control Systemsmentioning

confidence: 99%

Special Issue: Modeling and Simulation of Energy Systems

Adams

2019

Processes

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This editorial provides a brief overview of the Special Issue "Modeling and Simulation of Energy Systems." This Special Issue contains 21 research articles describing some of the latest advances in energy systems engineering that use modeling and simulation as a key part of the problem-solving methodology. Although the specific computer tools and software chosen for the job are quite variable, the overall objectives are the same-mathematical models of energy systems are used to describe real phenomena and answer important questions that, due to the hugeness or complexity of the systems of interest, cannot be answered experimentally on the lab bench. The topics explored relate to the conceptual process design of new energy systems and energy networks, the design and operation of controllers for improved energy systems performance or safety, and finding optimal operating strategies for complex systems given highly variable and dynamic environments. Application areas include electric power generation, natural gas liquefaction or transportation, energy conversion and management, energy storage, refinery applications, heat and refrigeration cycles, carbon dioxide capture, and many others. The case studies discussed within this issue mostly range from the large industrial (chemical plant) scale to the regional/global supply chain scale.

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“…Aspen Plus (Aspen Tech, Bedford, MA, USA) is a large-scale general process simulation system for plant design, steady-state design, and dynamic simulation. It is recognized as a large scale process simulation software in the chemical industry, which has been widely used in industrial design and academic research [31,32]. In this study, the conceptual design and optimization of PSD for the separation of acetonitrile and water mixture was carried out, so Aspen Plus was selected for steady-state simulation and optimization design.…”

Section: Introductionmentioning

confidence: 99%

Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

Wang

Lian

et al. 2019

Processes

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The separation of aqueous acetonitrile solution by pressure swing distillation (PSD) was simulated and optimized through Aspen Plus software. The distillation sequence of the low pressure column (LPC) and high pressure column (HPC) was determined with a phase diagram. The pressures of the two columns were set to 1 and 4 atm, respectively. Total annual cost (TAC) was considered as the objective function, and design variables, such as the tray number, the reflux ratio, and the feeding position, were optimized. The optimum process parameters were obtained. For the reduction of energy consumption, the PSD with full-heat integration was designed. The TAC of this method is lower by 32.39% of that of the PSD without heat integration. Therefore, it is more economical to separate acetonitrile and water mixture by PSD with full-heat integration, which provides technical support for the separation design of such azeotropes.

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Development of a Dynamic Model and Control System for Load-Following Studies of Supercritical Pulverized Coal Power Plants

Cited by 33 publications

References 18 publications

Design and Optimization of a Process for the Production of Methyl Methacrylate via Direct Methylation

Design and Optimization of a Process for the Production of Methyl Methacrylate via Direct Methylation

Special Issue: Modeling and Simulation of Energy Systems

Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

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