Challenges Associated With Retrofit of Selective Catalytic Reduction (SCR) and Flue Gas Desulfurization Plant (FGD) (New)

Presented By: Hardik Bhavsar & Y D Mishra

NTPC Global Energy Technology Summit 2016, New Delhi, India

Paper Summary:-

The Environment (Protection) Amendment Rules 2015 has new emission standards for coal based thermal power plants. With this amended emission standards, many coal based thermal power plant shall be retrofitted with Flue Gas Desulphurization (FGD) and Selective Catalytic Reduction (SCR) technology to meet the emission of sulfur dioxides and nitrogen oxides. Retrofit of coal based thermal power plant with FGD and SCR technology will pose many challenges with respect to layouts and necessary modifications to existing systems. This paper discusses in brief aspects of retrofit plant like boiler draft, boiler layout, utility consumption, electric auxiliary power, flue liners etc.

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Technologies to Utilize Existing Foundations for New Structures (New)

Presented By: Jaykumar Shukla & Soumen Sengupta

NTPC Global Energy Technology Summit 2016, New Delhi, India

Paper Summary:-

Old running plants may be founded on the pile foundations and while proposing new plant structures in place of existing plant structures, it is usual perception/assumption that these pile foundations need to be exhumed. However, these piles can be utilized for the new structures either by augmenting its load carrying capacity (i.e. lateral capacity) or by integrating them into new foundations system by performing proper soil structure interaction analysis. This paper discusses methods for enhancing the lateral pile capacity, integration of old and new piles in a pile group, analysis of pile rafts and approaches for settlement reducing piles already existing which can be implemented for new plant structures.

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Thermal Cycle Optimization and Improvement in Heat Rate - Supercritical and Ultra-Supercritical Power Plants

Presented by: Naveen H M & Y D Mishra

Paper Summary:-

Improving heat rate of the coal fired power plants has become a priority for power generation companies. Increases in the cost of coal and strict regulatory environment have led the industry to search for ways to improve the efficiency without compromising the market competitiveness. This paper identifies specific plant thermal cycle systems and equipment where improvements can be done by extracting the maximum benefits while respecting the operational constraints of the system/equipment, and provides estimates of the resulting heat rate improvements.

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Evaluation of Technical Parameters of 660 MW Coal Fired Thermal Power Plant having Air Cooled Condenser with Respect to Water Cooled Condenser

Presented by: Maulik Patel

Paper Summary:-

The availability of water for power plant is not adequate specifically in some of the areas of the world. In this case air can be used as a source to cool the steam in the condenser instead of water to reduce the water consumption of power plant. The choice of Air Cooled condenser is depending on the scarcity of water rather than the plant performance otherwise water cooled condenser provides better turbine cycle efficiency than the Air Cooled condenser. This paper presents the evaluation of Technical Parameters like steam consumption, heat rate, auxiliary power consumption and land requirement of 660 MW coal fired thermal power plant having air cooled condenser with respect to water cooled condenser.

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Engineering Aspects of Boiler System Machine Foundations in Large Fossil Power Plant Units

Presented By: Dipal P Trivedi, Raja I Bagga, Jignesh V Chokshi

4th Nirma University International Conference on Engineering (NUiCONE 2013), India

Fossil fuel (coal and gas) is the prime source of electricity generation in the modern world. Latest technologies are applied in power generation to improve the plant efficiency so as to have reduced emission of greenhouse gases. The increased need for power with thrust on efficiency & clean technology has led to power plant at single location with much larger unit size. Accordingly, from civil/structural engineering perspective, the challenge lies in accommodating larger facilities & heavier foundations in constrained space & various tough terrains……

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Structural Engineering Challenges in Structures for Cooling Water System in Thermal Power Plant

Presented By: Dipal P Trivedi, Raja I Bagga, Jignesh V Chokshi

3rd Nirma University International Conference on Engineering (NUiCONE 2012), India

Water is one of the most important resource requirements in thermal power plant for process cooling in the condenser, ash disposal, cooling of plant auxiliaries and various other plant consumptive uses. Cooling water requirement in a thermal power plant is a major resource issue for project feasibility as it has tremendous effect on the surrounding environment, population, animals and aquatic life. In a thermal power plant, Cooling Water system is one of the most important power plant systems which ensure continuous supply of cooling water for steam condensation in condenser and other plant equipment. The cooling process can be done either through air or with use of water and both have its merits and demerits. With increased power demand, the sizes of power plant units have increased substantially as compared with previous decades. This has further called for large structures and has imposed many engineering challenges for a power plant engineer. From civil and structural engineering perspective, the CW system involves very large water conveying and retaining structures namely cooling towers, intake and discharge channels, forebay, large underground sump, pump station for housing of large cooling water pumps, large piping between cooling tower and condenser, etc. In order to reduce the capital and running cost of the plant, thrust on economical design is emphasized. This imposes an additional constraint for engineer and it demands meticulous analysis and design to provide optimum techno-commercial solution. The present study describes various types of CW systems, structures and associated engineering challenges faced by structural engineer.

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Supercritical Technology - Present & Future

Presented By: B K Basu

12th World Innovation Summit & Expo- Power India 2010 - International Conference, Mumbai, India

Supercritical Technology is an emerging trend in power generation industry. With improved higher steam conditions and the advent of modern super alloys, the Rankine steam cycle has marched into the Super-Critical (SC) region of the coolant and generates thermal efficiencies into 40% plus range at Gross Calorific Value (GCV) of coal. With increase in demand for power, and growing concern about climate change it is imperative that environmentally friendly technologies like Supercritical technology be used for power generation.

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Large Power Transformers - Modern Trends

Presented By: Ranjan Bandyopadhyay, Mitesh Shah & Dominic S. Fernandes

CBIP, CIGRE, India & Doble Engineering Company at Delhi

An overview of some of the critical issues like Generator Transformer sizing criteria, optimisation opportunity in selection of Generator Transformer, issues affecting the selection of large size power transformer, salient requirements and recommendations of Indian and International standards are presented in the paper. The paper also addresses comparative analysis of single 3-phase transformer vs. 3 nos. single phase transformers, layout aspects along with the further course of action to be taken by the plant owner, engineering consultant as well as manufacturers to overcome constraints and difficulties as exists and to improve the overall plant efficiency, plant availability and performance of power generation and transmission system.

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Application of Pushover Analysis to Balance of Plant Units of Fossil Power Plants

Presented By: J V Chokshi & Raja I Bagga

The International Conference on Current Trends in Technology – NUiCONE 2010

Power plants have structures such as storage sheds, pipe rack, steam turbine generator building, service building, diesel generator building, electrical building, compressor building, fire water pump house building, etc. The balance of plant buildings are undertaken in the present study. A non-linear static procedure namely pushover analysis predicts the non-linear static approximation of the response, a structure will undergo, when subjected to dynamic earthquake loading. The pushover analysis considers the individual inelastic component of a structure resisting seismic forces, as well as the behavior of the structure as a whole. The analysis technique is progressive, allowing the engineer to withstand which components should reach threshold before others.

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