This document compares the efficiency of subcritical and supercritical pressure in thermal power generation. Supercritical pressure refers to pressure above the critical point of water at 374°C and 22.1 MPa, allowing steam to reach higher temperatures without changing phase. The document finds that supercritical units have higher efficiency (52-59%) than subcritical units (36-37%) due to higher steam parameters, reducing fuel consumption and emissions. Major power companies worldwide have adopted supercritical technology, and India is planning supercritical projects to improve efficiency and meet increasing energy demand.
COMBNED CYCLE POWER PLANT PPT
(Advanced method of Gas-Thermal based)
How Combined cycle Gas-Thermal Projects in India works.
Basic operation with details of modern Gas Booster Compressor (GBC) and highly efficient Heat Recovery Steam Generator(HRSG), General Electric Gas Turbines and BHEL steam turbines.
[in case anyone need much detail feel free to ping me]
The document summarizes a practical training seminar on the Dholpur Combined Cycle Power Project. It describes the project's setup in 2007 near Dholpur, Rajasthan to generate 330 MW of electricity using a combined cycle technique. This technique uses both a gas turbine and a steam turbine for improved efficiency. It also discusses the various components involved - the gas turbine, heat recovery steam generator, and steam turbine - and explains how combined cycle power generation provides benefits like high efficiency, low pollution, and low costs.
This document discusses the design of a hybrid micro thermoelectric and Stirling engine system for power generation. The system aims to optimize output power by combining two power sources - thermoelectric and Stirling engine modules. Experimental results are presented on optimizing individual module performance by increasing temperature difference, changing module position, and using aluminum to better transfer heat. The design incorporates a DC-DC buck-boost converter to further optimize total output power of the hybrid system.
Automobile air conditioning based on VAC using exhaust heatBhagvat Wadekar
The theoretical analysis, the feasibility of such a system in a positive frame. It can be summarized that: In the exhaust gases of motor vehicles, there is enough heat energy that can be utilized to power an air-conditioning system. Therefore, if air-conditioning is achieved without using the engine’s mechanical output, there will be a net reduction in fuel consumption and emissions. Once a secondary fluid such as water or glycol is used, the aqua-ammonia combination appears to be a good candidate as a working fluid for an absorption car air-conditioning system. This minimizes any potential hazard to the passengers. The low COP value is an indication that improvements to the cycle are necessary. A high purity refrigerant would give a higher refrigeration effect, while the incorporation of a solution heat exchanger would reduce the input heat to the generator. The present system has both a reflux condenser and a heat exchanger. However, the reflux condenser is proved inadequate to provide high purity of the refrigerant and needs to be re-addressed. The evaluation of the COP, with and without the heat exchanger also proves that unless there is a high purity refrigerant, the effect of the heat exchanger to the generator’s heat is small.
Il CSP di piccola taglia e il calore di processo: esempi pratici e casi studi...Sardegna Ricerche
L'intervento di Werner Platzer (Fraunhofer ISE) in occasione dell'evento "Solare termodinamico di piccola taglia: impianti dimostrativi in Sardegna e calore di processo industriale" che si è tenuto a Pula (CA) il 25 settembre 2015.
The document discusses strategies to increase the efficiency of combined cycle power plants beyond 60% without new gas turbine technology. It proposes optimizing heat recovery steam generators (HRSGs) with dual or triple pressure levels, increasing steam turbine output by up to 13%. Regeneration and reheat cycles for the gas turbine are also suggested to further improve efficiency to 65%. The paper analyzes these methods for maximizing combined cycle plant efficiency.
The document discusses methods for improving the efficiency of gas turbine engines. It describes the basic components and mechanism of gas turbines, including an air compressor, combustion chamber, and turbine. The document then reviews several specific techniques for boosting power output and heat rate, such as increasing inlet air density through cooling or boosting pressure. These efficiency upgrade options include ceramic coatings, inlet air cooling methods like fogging or refrigeration, and supercharging. While some upgrades are more expensive than others, the best option depends on the turbine's age, location, and operating cycle.
This document discusses closed cycle gas turbines using nuclear power. It presents the key features of high temperature gas-cooled reactors (HTGRs) that use helium as a working medium in a closed Brayton cycle with a gas turbine. HTGRs can achieve high thermal efficiencies over 40% and offer inherent safety advantages due to their use of inert helium and passive cooling. They also provide modularity and opportunities for additional applications like hydrogen production. The document reviews HTGR reactor designs, fuels, and turbomachinery considerations for closed cycle gas turbines using nuclear power.
This document provides an overview of a new technology that uses water swirling into hot gas streams from gas turbines, boilers, and internal combustion engines to increase efficiency. The technology involves injecting small water droplets into the exhaust or thrust gases and using a rotating piece to move the droplets into a donut-shaped steam zone. This increases the volume of gas, providing extra pressure or thrust to power an additional turbine connected to a generator. Analysis shows this approach can increase fuel-to-electricity efficiency by 12-14% for gas turbines. The presentation seeks discussion from experts on applying this technology to coal plants, engines, and aircraft propulsion.
It is most compact and precise presentation for the students doing their summer training from ntpc in control and instrumentation department.
Any kind of information can be taken from this slide regarding the controlling process the plant.
The electronics and communication students can get all information that is sufficient for the presentation on ntpc-singrauli
Water Efficiency in Thermal power PlantAtanu Maity
This document summarizes cooling technology options for thermal power plants in India and their relative costs and impacts. It discusses that water is essential for thermal power generation but many existing plants face water shortages. Wet cooling systems like induced draft and natural draft cooling towers are most common, but dry cooling using air-cooled condensers is an option where water is extremely limited. Dry cooling systems have higher capital and operating costs and lower efficiency however. The document recommends wet cooling towers for most Indian plants to reduce water use while maintaining efficiency.
BHEL Bawana Power Project is a 1500 MW combined cycle power plant located in Delhi. It uses gas turbines to generate power which is then used to create steam to drive steam turbines to generate additional electricity. The exhaust from the gas turbines is passed through a heat recovery steam generator to produce high pressure steam. The plant utilizes the latest power generation techniques like synchronous generators, static starters, circuit breakers and transformers to efficiently generate and distribute electrical power. Once operational, it will contribute over 1,500 MW of power to the electrical grid in India.
This document provides an overview of a presentation on vocational training for a combined cycle power plant. It discusses the contents to be covered, including an introduction to combined cycle power plants, the Brayton and Rankine cycles, configuration of CCGT power plants, components used, and DM water plants. The presentation was given by Arijit Roy from Vivekananda Global University for their 5th semester diploma in electrical engineering.
The document discusses a preliminary feasibility study for a proposed gas-fired combined cycle power plant (CCPP) in Malaysia. It analyzes the Kapar and Kuantan sites, finding Kapar most favorable due to existing gas pipeline infrastructure and proximity to high electricity demand in Klang Valley. The CCPP would utilize efficient gas turbine technology to generate 500-700MW of power and reduce carbon emissions by 17.5 million tons per year compared to coal power. A project schedule from 2015-2020 is outlined, with construction from 2018-2020. The conclusion is that a CCPP in Kapar would help ensure electricity supply security through efficient natural gas use and support Malaysia's climate goals.
The document discusses cogeneration and waste heat recovery. Cogeneration, or combined heat and power (CHP), simultaneously generates electricity and useful heat. Trigeneration adds cooling to CHP. Cogeneration improves efficiency and reduces emissions and costs. Waste heat recovery units transfer heat from high-temperature processes to improve efficiency. Common applications of waste heat recovery include preheating, steam generation, and power generation. Cogeneration offers economic and environmental benefits over conventional power generation.
Analysis of exhaust / stack to electricity / water swirled into gas turbinesLenAndersenBSChEEngi1
New technology has been developed with water into a
flow of hot gas in a swirling pattern most recently with a focus on
internal combustion engines , fired boiler stacks and, water swirled into gas turbines combined cycles for more fuel efficiency. Beyond more fuel efficiency there is pollution control of PM 2.5 and PM 10 particulate in coal firing etc.. The work in new combined cycle gas turbines prior to this is my two patents is to at the end of the power
turbine through blades and/or a mechanism to put water droplets into the hot thrust gas of 350 – 500 C going to steam in concentrated volume. This Technology is to have droplets of water mixed into the hot part of the gas turbine with the droplets of water traveling in a curved pattern after the combustion section.
This document discusses a student project to design a hybrid system of a micro thermoelectric generator and Stirling engine for power generation. The goals of the project are to 1) design a hybrid system combining these two power sources to generate electricity, and 2) optimize the output power of the hybrid system. The student will simulate the hybrid system design using PSpice before building a prototype. Analysis of the hybrid system performance will include parameters like voltage, current, power, speed, and temperature.
2016 Bowen - Burns & McDonnell presentation at Power-Gen, covering the challenges and benefits of Coal to Gas Conversion. Presented by Bowen's Ed Storrs, and Burns & McDonnell's Dary Burnett.
Solar net metering policy gujarat 2015 finalmechanicalinfo
Solar net metering is a billing mechanism that allows solar energy system owners to receive credit for excess electricity generated and added to the grid. It was introduced in Gujarat, India in August 2015, and allows residential and commercial customers to install solar systems up to 50% of their sanctioned load. The policy benefits consumers by providing financial credits for extra solar power produced without needing battery storage or backup generators.
This presentation provides an overview of boilers. It defines a boiler as a vessel that heats water to produce hot water or steam. The presentation describes the basic principle of operation where hot gases produced from burning fuel transfer heat to water inside the boiler vessel. It then discusses the main types of boilers, including fire tube and water tube boilers, and describes their key characteristics and differences. Examples are given of commonly used boiler designs like Babcock and Wilcox, pulverized fuel, and fluidized bed boilers. Factors for selecting an appropriate boiler type are also summarized.
Ntpc (national thermal power corporation) sipat mechanical vocational trainin...haxxo24
This document is a summer training project report submitted by Dinesh Kumar, a mechanical engineering student, on his vocational training at the National Thermal Power Corporation Sipat power plant in Chhattisgarh, India. The report provides an overview of NTPC Sipat, including its location, installed capacity, use of supercritical technology, and environmental management practices. It also describes the basic Rankine cycle used in thermal power plants, the major sub-systems of a power plant such as the coal handling plant, mills, water treatment plant and boiler, and includes diagrams of a typical power plant layout and the interior of a bowl mill.
introduction to thermal powerplant,type of thermal powerplant,captive powerplant,rankin cycle,co-generation powerplant,subcritical powerplant,supercritical powerplant,theory of operation,working principle,parts of powerplant,boiler,turbine,etc
This document discusses net metering, which is a billing mechanism that credits solar energy system owners for excess electricity generated and added to the grid. It allows two-way power transfers so that solar customers can draw power from the grid when their panels are not generating enough. The document outlines the components of a net metering system like solar panels, inverters, meters and switches. It explains the benefits of net metering like financial credits and reduced equipment needs. It also provides details on net metering policies in India and states like Andhra Pradesh. The conclusion states that net metering provides opportunities for reliable solar power by allowing excess power to be supplied to the grid and drawing power when solar is insufficient.
Ntpc (national thermal power corporation) sipat boiler haxxo24 i~ihaxxo24
The document discusses key points about subcritical and supercritical boiler design, operation, and control including:
- Differences between subcritical and supercritical boiler technologies
- Design parameters like steam pressure and temperature, air flow rates, and coal requirements
- Chemical treatment, feedwater, and boiler control systems
- Startup procedures including boiler filling and transitioning between wet and dry modes
Indian scenario of super critical power plants issues and challenges by ntpc...Ajay Singhal
This document discusses supercritical power plants in India, including:
1. NTPC operates several supercritical power plants in India with a total installed capacity of 3,300 MW. Their Sipat plant includes 3 x 660 MW supercritical units.
2. Supercritical technology provides benefits like reduced emissions, improved efficiency, and lower fuel costs compared to subcritical plants.
3. Operating supercritical plants presents issues and challenges related to boiler control, chemistry regimes, and performance optimization. NTPC's experience provides lessons for addressing these challenges.
Khagesh Kumar Chandra completed a vocational training project at the NTPC Limited SIPAT Super Thermal Power Station from June 21, 2012 to June 18, 2012. The project covered an overview of power plants, supercritical technology, and the main equipment used in power generation including boilers, turbines, and their maintenance. Khagesh gained hands-on experience of the equipment and processes during guided tours of the plant.
Supercritical power plants operate at higher temperatures and pressures than traditional subcritical coal plants, resulting in higher efficiencies of up to 46% and lower emissions. Supercritical plants use once-through boiler/turbine systems that exceed temperatures of 1075°F, compared to 850°F for subcritical plants. Benefits include reduced fuel and emissions costs. Modern supercritical plants have efficiencies over 45% and use proven emissions controls to reduce nitrogen oxide, sulfur oxide, particulate, and mercury emissions.
This document summarizes a student's study of the boiler system at the NTPC Ramagundam thermal power station in India. Key points:
- The study examines how coal is combusted in the boiler to generate high-pressure steam, which is then used to power turbines and generate electricity.
- The NTPC plant uses high-pressure water tube boilers fueled by pulverized coal. It can generate 2600MW of power through 7 generating units.
- Boiler components like water walls, drums, and superheaters are discussed. Steam is generated at high pressures and temperatures before powering turbines.
- Boiler reliability is critical but failures can occur due to issues like poor design
Adoption of supercritical technology (1)HARSHIT GUPTA
India has significant coal reserves and is looking to adopt supercritical steam technology to generate more power while improving efficiency and reducing emissions. Supercritical plants can achieve efficiencies of up to 15% higher than subcritical plants through higher steam temperatures and pressures. However, developing high temperature alloy steels is a key challenge. A study analyzed the costs and technical feasibility of importing supercritical technology from other countries versus developing it domestically. The study found domestic development could reduce costs by around 30-40% compared to imports but would require 2-6 years to transfer the technology depending on the complexity of the plant design.
This industrial training report summarizes Rajan Kumar Choudhary's internship at the National Thermal Power Corporation plant in Korba, Chhattisgarh, India. It includes declarations of original work, descriptions of the basic processes in coal-fired thermal power generation including combustion of coal to produce steam, expansion of steam in turbines, and the Rankine cycle of heating water to produce pressurized steam. It also provides an overview of the National Thermal Power Corporation as the largest thermal power producer in India, with descriptions of its coal-fired power stations.
The document provides information about the Barh Thermal Power Station located in Patna, Bihar, India. It is owned by NTPC Limited and has a total installed capacity of 3,300 MW produced across 5 units of 660 MW each. The power plant uses coal as its fuel and employs a steam turbine generator configuration. It began operations in 1999 and was established to supply electricity to the state of Bihar at a total project cost of over 26,000 crore rupees.
The document summarizes the fabrication of a Stirling engine project by a group of mechanical engineering students. It provides background on Stirling engines, including their history and operating cycle. It then describes the project, which involves designing and building a solar-powered Stirling engine system consisting of a solar collector and Stirling engine components weighing less than 10kg. The project aims to harness solar energy without using non-renewable fuels. The document outlines the selected concept design, includes dimensions for the solar dish collector and base, and presents a Gantt chart and discussion of the market potential for the system.
Developing a new generation of energy efficiency products for reciprocating e...Bowman Power
Learn how a new energy efficiency product gets made, from opportunity to concept, design, validation and production, with this free presentation from the 73rd Indonesia National Electricity Day & POWER-GEN Asia. #PGASIA
IRJET- IC Engine Waste Heat Recovery SystemsIRJET Journal
The document summarizes various waste heat recovery systems for internal combustion engines. It discusses organic Rankine cycle systems and thermoelectric generator systems for recovering heat from engine exhaust gases. Organic Rankine cycle systems use a turbine to convert the thermal energy of exhaust gases into electricity via a Rankine cycle. Thermoelectric generators use the Seebeck effect to directly convert a temperature difference into electricity. The document analyzes the advantages and disadvantages of these waste heat recovery technologies and their potential to improve engine efficiency and reduce emissions.
This document provides details about Ayan Mondal's internship at the Budge Budge Generating Station (BBGS) owned by CESC Ltd. It includes information about BBGS such as its capacity, fuel sources, land area, departments Ayan worked in including operations, planning, mechanical maintenance, and electrical and instrumentation. It concludes by thanking the managers and employees who helped with his training.
Ntpc (national thermal power corporation) sipat mechanical vocational trainin...haxxo24
This document is a report submitted by Khagesh Kumar Chandra detailing his vocational training project at the NTPC Limited Sipat Super Thermal Power Station from June 21, 2012 to June 18, 2012. The project involved gaining an overview of the power plant including topics like super critical technology, basic power plant equipment and operations, boilers, turbines and their maintenance. Khagesh thanks the guides and HR department for organizing the training program and declares the report contains his original work.
The document is a training report submitted by Amit Kumar describing his one month training at the Kanti Bijlee Utpadan Nigam Limited power plant in Muzaffarpur, Bihar, India. It provides an overview of the plant, describing that it has two 110MW coal-fired generating units. It then summarizes the key components and processes involved in thermal power generation, including converting coal to steam in the boiler, using steam to power the turbine for mechanical energy, and generating electricity through the generator. It concludes by outlining the sections to be covered in the full report.
The document provides details about Ranjan Kumar's summer practical training at the National Thermal Power Corporation (NTPC) plant in Kahalgaon, Bihar, India. It discusses the various departments and systems at the plant including coal handling, ash handling, the boiler and turbine systems, water treatment, the cooling tower, electricity generation equipment, transformers, the switchyard, and control and instrumentation. The NTPC Kahalgaon plant has a total installed capacity of 2340 MW and uses coal from nearby mines to generate electricity through its steam turbine units.
Thermal power plants generate 65% of India's electricity. The Yamunanagar Thermal Power Project in Haryana has 2 units of 300 MW each for a total capacity of 600 MW. It uses a boiler, furnace, turbine, super heater, re-heater, and other components. Coal, water, and steam flows are essential to its functioning. Key operational features inside the plant include the boiler, drum, heaters, furnace, draft fans, chimney, condenser, and turbines.
The document provides an overview of the practical training completed at the Government Engineering College in Jhalawar, India. It summarizes the key components of the 1200 MW Kalisindh Super Thermal Power Project, including: (1) the coal handling plant that processes 56 lakh tons of coal per year, (2) the 600 ton per hour boiler that converts water to high pressure steam, and (3) the 600 MW steam turbine powered generator that produces electricity. It concludes with brief descriptions of other essential parts of the power plant like the ash handling system, cooling towers, and electrical switchyard.
This document provides an overview of the internship experience of Sagar Chand at Rajghat Power Station from May 5, 2014 to June 9, 2014. It begins with an acknowledgment of those who supported and guided him. It then includes sections on power plant basics, the components and processes involved in thermal power generation including steam, the Rankine cycle, steam turbines, and the various circuits. It also covers control and instrumentation systems used in power plants. The document is intended to provide knowledge gained from the internship that will be valuable for Sagar's career as an electrical engineer.
Introduction And Differences Between File System And Dbms.pptxSerendipityYoon
An introduction to file systems and a database management system. This document provides a free powerpoint presentation about the differences between a file system and database management system. Advantages and disadvantages of file system and database management system.
1. DEE 1203 ELECTRICAL ENGINEERING DRAWING.pdfAsiimweJulius2
This lecture will equip students with basic electrical engineering knowledge on various types of electrical and electronics drawings, different types of drawing papers, different ways of producing a good drawing and the importance of electrical engineering drawing to both engineers and the users.
By the end of this lecture, students will be to differentiate between different electrical diagrams like, block diagrams, schematic diagrams, circuit diagrams among others.
Slides from my talk at MinneAnalytics 2024 - June 7, 2024
https://datatech2024.sched.com/event/1eO0m/time-state-analytics-a-new-paradigm
Across many domains, we see a growing need for complex analytics to track precise metrics at Internet scale to detect issues, identify mitigations, and analyze patterns. Think about delays in airlines (Logistics), food delivery tracking (Apps), detect fraudulent transactions (Fintech), flagging computers for intrusion (Cybersecurity), device health (IoT), and many more.
For instance, at Conviva, our customers want to analyze the buffering that users on some types of devices suffer, when using a specific CDN.
We refer to such problems as Multidimensional Time-State Analytics. Time-State here refers to the stateful context-sensitive analysis over event streams needed to capture metrics of interest, in contrast to simple aggregations. Multidimensional refers to the need to run ad hoc queries to drill down into subpopulations of interest. Furthermore, we need both real-time streaming and offline retrospective analysis capabilities.
In this talk, we will share our experiences to explain why state-of-art systems offer poor abstractions to tackle such workloads and why they suffer from poor cost-performance tradeoffs and significant complexity.
We will also describe Conviva’s architectural and algorithmic efforts to tackle these challenges. We present early evidence on how raising the level of abstraction can reduce developer effort, bugs, and cloud costs by (up to) an order of magnitude, and offer a unified framework to support both streaming and retrospective analysis. We will also discuss how our ideas can be plugged into existing pipelines and how our new ``visual'' abstraction can democratize analytics across many domains and to non-programmers.
If we're running two pumps, why aren't we getting twice as much flow? v.17Brian Gongol
A single pump operating at a time is easy to figure out. Adding a second pump (or more) makes things a bit more complicated. That complication can deliver a whole lot of additional flow -- or it can become an exercise in futility.
Hate speech detection using machine learningrakeshrocking3
Hate speech detection involves the application of natural language processing (NLP) and machine learning techniques to identify and categorize text that contains harmful, offensive, or discriminatory language targeted towards individuals or groups based on attributes like race, religion, ethnicity, gender, or sexual orientation. The goal is to automate the process of identifying such content to prevent its spread and mitigate its negative impact.
1. To Study Efficiency of Thermal
Power Generation Using Sub Critical
and Supercritical Pressure
Department of Chemical Engineering
College of Engineering and Technology, Akola
( B. Tech final year)
PRESENTED BY
Prajwal G. Patil
3. INTRODUCTION
What is Super critical pressure ?
What is Sub critical pressure ?
Water reaches to this state at a critical
pressure above 22.1 MPa and 374 oC.
4. HISTORY
Since 1950s,
The United State (1300 MW/35 MPa/760 ℃)
Japan (1050 MW/34.5 MPa/620 ℃)
The European Union (1000MW/37.5 MPa/700 ℃)
China: Main steam pressure >270 Bar
5. INNOVATIONS
Supercritical units have been developed into proven
mature and commercialized advanced technologies in
the world
Over 600 supercritical coal‐fired units have been
successfully into commercial operation for decades
worldwide
The 1300MW class supercritical units with steam
parameters of 31MPa/600 ℃ are being developed in
industrial economies
7. SCOPE AND OBJECTIVE
• CO2 emissions can be lowered by improving the efficiency
of coal fired power plants.
• Increasing the temperature & pressure in a steam turbine
increases the efficiency of the Rankine steam cycle used in
power generation,
• It decreases the amount of fossil fuel consumed and the
emissions generated.
• Large amount of carbon-di-oxide (CO2) emissions
produced by them which contribute in a large measure to
greenhouse effect and global warming.
13. THERMAL POWER PLANT
water as working fluid
Energy transformation
Rotation of turbine
Electricity production
Fig.1 Power is produced in thermal power plants by rotating steam turbine
14. ENERGY ABSORPTION FROM STEAM
Loss of energy
Expansion of steam
Constant Entropy
Fig.2 Pressure and temperature drop of steam when turbine absorbs energy from it
15. USE OF CONDENSER
Expansion
Conversion by rejection of heat
constant pressure
Fig.3 Use of condenser in order to transform vapour into liquid state
16. PUMPS
To raise the pressure
Regained its original pressure
Fig.4 Compressor pumps the fluid to its original pressure
17. HEAT ADDITION IN BOILER & RANKINE CYCLE
External heat
Heat exchanger
Transform to vapour and regains its original temperature
This completes the thermodynamic cycle of a thermal
power plant, called Rankine Cycle
Fig.5 Heat addition at boiler brings the fluid to its original temperature
19. COMPARISION OF SUPER CRITICAL & SUB
CRITICAL
DESCRIPTION SUPERCRITICAL
(660MW)
SUB-CRITICAL
(500MW)
Circulation Ratio 1 Once-thru=1
Assisted Circulation=3-4
Natural circulation= 7-8
Feed Water Flow
Control
-Water to Fuel
Ratio (7:1)
-OHDR(22-35 OC)
-Load Demand
Three Element Control
-Feed Water Flow
-MS Flow
-Drum Level
Latent Heat Addition Nil Heat addition more
Sp. Enthalpy Low More
Sp. Coal consumption Low High
20. DESCRIPTION SUPERCRITICAL
(660MW)
SUB-CRITICAL
(500MW)
Coal & Ash handling Low High
Pollution Low High
Aux. Power
Consumption
Low More
Overall Efficiency High
(52-59%)
Low
(36-37%)
Total heating
surface area Reqd
Low
(84439m2)
High
(71582m2)
Tube diameter Low High
CONTINUE..
22. ADVANTAGES OF SC TECHNOLOGY
Plant efficiency up to 52-59%
• Conservation of fuel resources
• Reduction of Atmospheric Pollutants
- CO2 , SOx & NOx
Higher cycle efficiency means
• less fuel consumption
• less per MW infrastructure investments
• less emission
• less auxiliary power consumption
• less water consumption
Operational flexibility
• Better temp. control and load change flexibility
• Shorter start-up time
• More suitable for widely variable pressure operation
23. Reductions
• Coal Consumption
• Ash production
• CO2
• SO2
• NOx
Improvements
• Startup time
• Sliding Pressure Operation
• Load following capability
Other advantages
• Reduced emission for each KWH of electricity generated
• 1% rise in efficiency reduces the CO2 emission by 2-3%
• The Most Economical way to enhance efficiency
• Fuel cost saving : Economical
• Reduced the Boiler size / MW
• Reduced Start-Up Time
• Enhancements
24. • Erection
• Operation
• Maintenance Practices
• Water chemistry is more stringent in super critical once through
boiler.
• Metallurgical Challenges
• More feed pump power is required due to more friction losses in
spiral water wall.
• Maintenance of tube leakage is difficult due to complex design of
water wall.
CHALLENGES OF SUPERCRITICAL TECHNOLOGY
25. IMPLEMENTATION OF SC TECHNOLGY AND
FUTURE IN INDIA
Supercritical units in India:
• There haven’t been any supercritical units in use in India so
far.
• The National Thermal Power Corporation (NTPC), Sipat
Here are some upcoming projects in India:
• North Karanpura, Jharkhand – 3x660 MW
• Darlipali, Orissa – 4x800 MW
• Lara, Chattisgarh – 5x800 MW
• Meja, Uttar Pradesh - 2x660 MW
• Sholapur – 2x660 MW
• New Nabinagar-3x660 MW
26. SUPER CRITICAL TECHNOLOGY -EFFICIENCY
IMPROVEMENTS IN NTPC
Sub -critical Super -critical units
Old Recent Plant-I Plant-II Plant-III
Unit Size 500 MW 500 MW 660 MW 660 MW 660 MW
MS Pressure
kg/cm2
170 170 247 247 247
MS Steam
Temp(℃)
537 537 537 537 565
RH Steam
Temp(℃)
537 565 565 565 593
Gross
Efficiency
(HHV) %
38.00 38.26 39.26 39.84 40.14
28. SUB. VS. SUPERCRITICAL CYCLE IMPACT ON
EMISSIONS
Plant Efficiency, %*
Plant Efficiency, %
Fuel Consumption/Total Emissions
including CO2
Subcritical Supercritical
34 - 37 52 - 59
Plant Efficiency, Btu / kw-hr 10,000 - 9,200 9,200 - 8,300
34%
Base
37%
Base-8%
52%
Base-17%
30. CONCLUSION
• Hence shifting from Subcritical to Supercritical improve
efficiency of thermal power plant
• Electric power generation in India will continue to be
dominated by Thermal power generation for at least
next 40-50 years
• Development and application of clean, high efficiency,
large capacity, Thermal power generation technology is
a long term strategic task for India
• In order to meet our increasing demand for electric
power, as well as to improve coal utilization efficiency
and reduce pollutant emissions from thermal power
plants, we have to develop domestic supercritical units
31. REFERENCES
Smith, The Book Thermal Engineering, 2009
“Design Aspects of the Ultra-Supercritical CFB Boiler”; Stephen J.
Goidich, Song Wu, Zhen Fan; Foster Wheeler North America Corp.
“Novel conceptual design of a supercritical pulverized coal boiler
utilizing high temperature air combustion (HTAC) technology”;
Natalia Schaffel-Mancini, Marco Mancini, Andrzej Szlek, Roman
Weber; Institute of Energy Process Engineering and Fuel
Technology, Clausthal University of Technology, Agricolastr. 4,
38678 Clausthal-Zellerfeld, Germany; 6 February 2010.
“Supercritical (Once Through) Boiler Technology”; J.W. Smith,
Babcock & Wilcox, Barberton, Ohio, U.S.A.; May 1998.
“Steam Generator for Advanced Ultra-Supercritical Power Plants
700 to 760°C”; P.S. Weitzel; ASME 2011 Power Conference,
Denver, Colorado, U.S.A; July 12-14, 2011.
“Supercritical boiler technology for future market conditions”;
Joachim Franke and Rudolf Kral; Siemens Power Generation;
Parsons Conference; 2003.
32. “Steam Turbine Design Considerations for Supercritical Cycles”;
Justin Zachary, Paul Kochis, Ram Narula; Coal Gen 2007
Conference;1-3 August 2007.
“Technology status of thermal power plants in India and
opportunities in renovation and modernization”; TERI, D S Block,
India Habitat Centre, Lodi Road, New Delhi – 110003.
“Applied Thermodynamics”; Dr. H.N Sawant; January 1992;
revised July 2004.
“http://en.wikipedia.org/wiki/Boiler#Supercritical_steam_generator
”
Mitsubishi Heavy Industries Technical Review Vol. 50 No. 3
(September 2013)
NETL (National Energy Technology Laboratory) (2008), Reducing
CO2 Emissions by Improving the Efficiency of the Existing Coal-
Fired Power Plant Fleet, DOE/NETL-2008/1329, NETL,
Pittsburgh, PA, www.netl.doe.gov/energy-
analyses/pubs/CFPP%20Efficiency-FINAL.pdf.
Editor's Notes
To study efficiency of thermal power generation using sub critical and supercritical pressure in NTC