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RISS 인기검색어
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- 저자 : Alobaid, F. (검색결과 3 건)
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Modeling and investigation start-up procedures of a combined cycle power plant
Alobaid, F.,Postler, R.,Strohle, J.,Epple, B.,Kim, H.G. Applied Science Publishers 2008 APPLIED ENERGY Vol.85 No.12
This study describes the particular development and investigation of a static and dynamic simulation model and its application to improve the start-up process of a combined cycle power plant. Generally, the power plant system and control design mean highly complex interactivities. The dynamic simulation models using powerful computers are effective tools for studying and understanding the operating characteristics of power plants to meet and improve the design, control strategy and operational requirements. The heat recovery steam generator (HRSG) is modeled by using commercial simulation software named advanced process simulation software (APROS). The HRSG model includes an advanced control philosophy and turbine bypass systems to have a high level of accuracy, especially during hard transients. The comparison between the simulation results and measured data is documented. The received results proved and embodied that the simulation is both very reliable to estimate the real HRSG dynamic behaviour and capable to predict the operational processes. Through a parametric study, the start-up time will be reduced while keeping the life-time consumption of critically stressed components under control.
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Unleashing the potential of ceramic discards as a green marvel in self-compacting concrete
P. Subashree,V. Sampathkumar,S. Gowtham,Abeer A. AlObaid,Ismail Warad 한양대학교 청정에너지연구소 2024 Journal of Ceramic Processing Research Vol.25 No.2
A nation’s ability to advance depends heavily on its infrastructure, which is frequently built using concrete. Self-compactingconcrete (SCC) is well-liked for its mechanical, durability and workability. But there is a problem: natural aggregate isscarce. In light of the depletion of natural resources, investigating substitute materials is essential to maintaining buildingquality. The ceramic tile business has developed into a highly industrialized sector within the last 20 years, producing a largeamount of trash. This trash presents environmental risks and pollutes the air, water, and land since it is made up of ceramiccombinations. The environment and public health are adversely affected by around 30% of the trash produced every day inthe ceramics industry. Although some research points to the possible use of ceramic waste in building materials, its acceptanceis hampered by a lack of clear regulations, which puts the sector in the face of growing waste management difficulties. Thisresearch looks at using leftover ceramic tile as fine aggregate in SCC. Six SCC mixes were made, with the amount of leftoverceramic tile ranging from 0% to 50%. Based on fresh, mechanical, and durability qualities, the mix’s density and homogeneityare enhanced by the use of discarded ceramic tile. The SCC combinations provide positive results in terms of improvedmechanical strength and optimum durability qualities, especially when natural M-sand is substituted by 40%.
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김현기(Kim Hyun-Gee),선칠령(Seon Chil-Yeong),이채수(Lee Chae-Soo),Falah Alobaid 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
This paper presents a static and dynamic simulation model of a Super Critical Heat Recovery Steam Generator (SC HRSG) and its application to investigate the load changes and start-up processes for the next generation high efficiency combined cycles. To design the modem combined cycle power plants with high pressure and temperature steam requirements, it is necessary to generate detailed computer models. As an important supports for designers this study describes the upgrading of a validated subcritical HRSG model to SC HRSG. The model includes advanced control circuits to achieve a high level of accuracy, especially during startup. The comparison between the simulation results and the designed data in steady state and different load changes are documented. The obtained results demonstrate that the simulation is very reliable to predict the startup procedure for the SC HRSG. And differences in the thermal efficiency between Sub & SC HRSGs during warm start-up process are assessed.
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