PRESENTATION ON SUMMER INTERNSHIP

Prepared by : Mr. UdbhavInstitution : ------Class : ------Enrollment No.: ------

SUMMER INTERNSHIP

Company : NTPC Badarpur

Location : Badarpur, Delhi

Period : 26th May to 7th July (6 weeks)

1. ABOUT THE COMPANY NTPC is India’s largest power producer, it was

established in 1975. It is an Indian Central Public Sector Undertaking under

the Ministry of Power, engaged in the business of generation of electricity and allied activities. It is a company incorporated under the Companies Act 1956.

The total installed capacity of the company is 45,048 MW with 18 coal based and 7 gas based stations.

It has been ranked as “6th Best Company to work for in India” among the PSU and Large Enterprises for the year 2014, by the Great Places to Work Institute, India.

2. THE BADARPUR THERMAL POWER STATION It is one of the oldest power station in whole of

asia, its construction began in 1968 and first unit was commissioned in 1973.

It is a coal fired power station. It comprises of three unit’s each of 95MW

capacity and two unit’s each of 210MW capacity.

Its overall capacity 705MW, with an efficiency of 36%.

3. POWER CYCLES The steam plant operates upon Rankine cycle

which is a vapour power cycle. Modification is done to increase efficiency.

It comprises of two isentropic compression and expansion processes and two isobaric heat transfer processes.

Reheating is done by passing the steam to boiler after 1st H.P. turbine and then passing through a second L.P. turbine.

In Regeneration some of the steam is bled off and used to partially reheat the feed water.

Fig. 1 Plant Layout(acc. To cycle)

4. SOME TERMS INVOLVED Unit heat rate: The heat rate of a power plant

is the amount of chemical energy that must be supplied to produce one unit of electrical energy.

Plant Load Factor(PLF):  is a measure of average capacity utilization. If can be affected by non-availability of fuel, maintenance shut-down, unplanned break down,etc. But since power cannot be stored the generation has to be adjusted. The formula = Gross Generation / (Installed Capacity * Number of Hours)

TERMS (contd.) Specific Fuel Consumption: This is the

amount of fuel(coal) used to produce a unit power, for NTPC badarpur it is 0.6kg/kWh.

Planned Maintenance: It is a planned, documented and scheduled procedure to be completed before a breakdown occurs.

Forced Outage: It is the shutdown condition of a power station when the generating unit is unavailable to produce power due to unexpected breakdown. It can be caused by equipment failures, disruption in fuel supply, operator errors etc.

5. COMPONENTS Boilers burn the fuel transferred from the tank

and use the resulting heat to convert water into steam. Inside the boilers are tens of thousands of water-carrying tubes. When combustion commences, the temperature inside the boilers rises to between 1,100 and 1,500°C, the water inside the tubes is turned into high-temperature and high-pressure steam, and the steam is transferred to the steam turbines.

COMPONENTS (contd.) Turbines The steam rotates the turbine blades

at a high speed of 3,000 rpm. This turns the power generator, which is directly connected to the turbines, and electricity is produced as a result. This electric power is then delivered along power transmission lines and through substations to the homes of customers. The steam is cooled by seawater in a condenser, restored to water, and then returned to the boiler for reuse. This cycle of water to steam to water is repeated over and over again.

COMPONENTS (contd.) Generator: An Electrical generator is a device

that converts kinetic energy to electrical energy, generally using electromagnetic induction. the generators must rotate at constant synchronous speeds according to the frequency of the electric power system, the most common speeds are 3000 r/min for 50 Hz systems.

Plant Auxiliary: It comprises of all other features like water treatment plant, feedwater, cooling towers, ash handling, repair shops, etc.

6. MAINTENANCE OBJECTIVES To prevent plant breakdown. To increase the reliability of operating

functions. To minimize production loss due to failures. To keep the equipment safe and prevent safety

hazards. To improve the product quality and maximize

production utilization.

7. TYPES OF MAINTENACE PROCESS

8. CONCLUSION

The six week summer internship was a great opportunity to analyze the working of a thermal power plant and recognize the commitment of the work-force involved there.

THANK YOU