R & M

PRESENTATION FROM indo engineering project corporation

We offer a wide range of world-class services and optimum solutions covering rehabilitation, renovation and modernizati modernization, and related operation & maintenance services for coal-and gas-fired power stations, hydroelectric power stations, switch yards transmission systems, substations, etc.

We offer a wide range of world-class services and optimum solutions covering rehabilitation, renovation and modernizati modernization, and related operation & maintenance services for coal-and gas-fired power stations, hydroelectric power stations, switch yards transmission systems, substations, etc.

IEPC is a Authorized consultant of BHEL ( R & M)

The company has executed number of R&M works in various thermal power plants. Currently the company is executing R&M works at NTPC Gujrat 2×210 MW,

Tanda(4×110 MW), MPPGCL, Amarkantak(2×120 MW), JSEB
Patratu(1×50 MW+1×110 MW),Ranchi(33 KC Substation work) etc

Objectives of R&M.

IEPC offers proven technological solutions to reduce the emission level of thermal power plants in operation in the country today.

The objectives of R&M are to achieve rated output/higher than rated output, better availability, improved performance/efficiency and life extension of unit.

Improvement in emission levels from thermal power plants is also one of the major objectives of R&M.

SITE TESTING

RLA & R&M STUDIES

LIFE” OF COMPONET CAN BE DEFINED BASED ON

  • PERFORMANCE OF INDTENDED FUNCTION
  • SAFELY, RELIABLY AND ECONOMICALLY

LIFE” OF COMPONET CAN BE DEFINED BASED ON

  • Most of the 200/210 MW Units in India have
  • higher running hours.
  • The first series of 500 MW Units at NTPC
  • stations are nearing 150,000 Hrs. of operation.
  • There is considerable potential for Life through R&M.
  • R&M has good CDM potential

RLA AND R&M STUDIES
NEED OF REMAINING LIFE ASSESSMENT

ACTUAL LIFE USE OF MIN PROPERTIES IN DESIGN
FACTOR OF SAFETY
LIFE EXTENSION CONSERVATIVE OF OPERATION OF UNIT INACCURACIES OF DATA EXTRAPOLATION OVER ESTIMATION OF OXIDATION EFFECTS
DESIGN LIFE UNANTICIPATED STRESSES OPERATION OUTSIDE DESIGN LIMITS TEMP,PRESS, THERMAL CYCLING
PREMATURE RETIREMENT CORROSION & ENVIRONMENTAL EFFECTS. METALLURGICAL CHANGES

ACTUAL LIFE

  • PRE AND POST SHUT DOWN STUDIES.
  • Collecting design parameters.
  • Finding the reason for lowered efficiency
  • Finding the suitable replacement with existing modern components.
  • Efforts will be done for achieving the name plate capacity or more.

METHODOLOGY

  • RLA studies boiler and other auxiliaries Turbine, Condenser, WT plant
  • RLA studies of Transformers, breakers, switch yard equipments
  • BOILER FLAME MEASUREMENT
  • Insulation conditions of boilers

CORRECTIONS MADE IN BOILER

  • BURNER TILT POSTIONS
  • DAMPER POSTION CORRECTIONS
  • QUANTITY OF AIR SUPPLY
  • COAL QUANTITY TO DIFFERENT BURNERS

NEED FOR R&M
Increased capacity utilization of existing units supplement new generation capacity addition

  • A low cost and short gestation period option for enhanced generation.
  • Restoration of derated capacity and/or extension of economic life.
  • To overcome technological obsolescence & non availability of spares.
  • Environmental & safety requirements.
  • Reluctance by utilities
    • New built more attractive.
    • Long shutdowns required.
    • Uncertainty about benefits.

Accumulated work order with original equipment manufacturers (OEM) resulting in delays, OEM more

  • oncentrating on new projects
  • Lack of contracting & executing agencies.
  • Delays in conducting RLA studies.

Non resolution of contractual issues.

  • R&M to be taken as a one time approach and not a substitute for regular maintenance.
  • Need for improved O&M practices in post R&M scenario.

Large number of small size inefficient units not viable candidates.
Emerging potential candidates are the large fleet of 200/210MW units.

LMZ machines of 200/210MW units (53 Nos.) more than 20 years old are priority
candidates for enhanced output and higher design efficiency due to :

  • low design efficiency
  • spares non-availability
  • Ageing
  • derated output
  • obsolscence
  • 200/210 MW (37 Nos.) & few 500 MW units which are more than 15 years old can also be considered depending on resources and plant condition.