sustaining power plant life through rehabilitation as a part of life cycle management program r02
TRANSCRIPT
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Sustaining Power Plant Life Through
Rehabilitation as A Part of Life Cycle
Management Program
Mr. Herdiyanto SoekonoHead of Engineering Division
Arief Mustaqim
Staff of Engineering DivisionPT. Indonesia Power
National Conference On Electricity Business & Technology
Jakarta, 1-2 October 2014
Case Study of Kamojang Geothermal Power Plant (KGPP)
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Outline :
Background
Life Cycle Management of KGPP
Feasibility Study for Rehabilitation
The Compliance of Performance Standards on
Environmental and Social Sustainability
Conclusion
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Background
KGPP- is the first geothermal plant in Indonesia with the totalinstalled capacity 140 MW, almost 30 years in operation and theexistence still needed by the grid.
KGPP is Owned & operated by PT. Indonesia Power subsidiary of PLNwhile steam supplied by Pertamina Geothermal Energy
Several references stated, EPRI experiences, rotating part of thepower plant shall be replaced after 200.000 hrs operation orrefurbished due to integrity inspection results, another referencestated the life time of power plant can be achieved 65 years with theschedule of rehabilitation at 25 years and 45 years and after 65 yearsold demolition shall be considered.
The need to sustaining KGPP life to prolong its existence as perworldwide references
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Life Cycle Management of KGPP
Business Impact vs Phase of Asset life.
Source: adapted from several references4
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Life Cycle Management of KGPP
Deployment of LCM
LCM has been developed by considering :
Technical evaluation of system structure component,
Identification and evaluation of life cycle alternative plan
Life cycle cost analysis for the justified life cycle alternative
plan
Selection of optimum life cycle plan
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Life Cycle Management of KGPP
O&M Strategy Program
Maintenance Strategy Program
EAF > 90%
Corrective
Preventive
& ProActive
Predictive
Turbinerepairement
Generatorrewinding
RetainningRing
replacement
CoolingTower part
replacement
coolingsystem and
some part ofsteam pipeinstalation
repairment and refurbishment activities
as a part of Life Management
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Life Cycle Management of KGPP
Life Assessments Program
Life Assessments Program of KGPP scenario considering several issues as
follows :
Operation &
maintenance historicalrecords
Examination analysisboth NDE / DE
Life prediction withrobust model which give
high confidence levelusually comes from
research organization
statistical review fromsister plant
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Life Cycle Management of KGPP
Life Assessments Program
Turbine & Steam
Blade
Rotor
Diaphragm
Turbine Valve
Receiving header
Demister
Final separator
Pipeline system
I&C
Plant DAS to DCS
Turbine COntrol
BOP Main Motor
Main cooling waterpump
Cooling tower fanmotor
Cooling Tower
Civil Structure
Cooling Element
Generator & Trafo
Rotor
Stator
Transformerwinding
The equipment list of geothermal power plant as a concern of lifeassessment program as follows:
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Feasibility Study for Rehabilitation
Results:
The result of material inspection such as NDT and Microstructure
investigation found some defect as well micro cracks and predicted the
life time of HIP turbine on the near end of life. Other defect found in
hot and pressured steam piping such as degradation of wall thickness
and also predicted the life time on the near end of life phase. (thestatement from several references confirmed)
Beside the life time to be extended, the turbines efficiency will plant to
be increased by applied new design of turbine blade as well as the new
material and digital control system.
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The result of financial analysis show an optimistic result from
financial indicator with the assumption of steam contract from PGE
to be establish at least for the next 15 years. (Several studies
confirmed Kamojang Geothermal field predicted exist for the next
20 to 25 years from 2005)
Due to significant budget needed to execute the program and
regulation of the company, in Order to get financing for the
rehabilitation program the plant should comply IFC to meet the
requirement of world wide financing organization.
Feasibility Study for Rehabilitation
Results:
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Tentative Illustration
Rehabilitation Scope of Work
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AVR
DCIS
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The Performance Standards on Environmental and Social Sustainability
used in the Feasibility Study is IFC (International Finance Corporation)
The IFC guideline consists of 8 performance standard to comply;
Assessment and Management of Environmental and Social Risks and Impacts
Labour and Working Conditions
Resource Efficiency and Pollution Prevention
Community Health, Safety, and Security
Land Acquisition and Involuntary Resettlement
Biodiversity Conservation and Sustainable Management of Living Natural
Resources
Indigenous Peoples
Cultural Heritage
The Environmental and Social Assessment in accordance IFC performance standard
results KGPP life extension project planning meet majority performance standard
required
The Compliance of Performance Standards
on Environmental and Social Sustainability
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Conclusion:
Life assessment program for main equipment as an input of life
cycle management program conducted partially and scheduled with
outage time of the plant. Based on the life assessment results
selected life cycle program for KGPP justified.
The feasibility study results the life extension program to be
feasible both from technical, financial and risk identification point
of view including the predicted steam availability for the next 20
years.
The Environmental and Social Assessment in accordance IFC
performance standard results KGPP life extension project planning
meet majority performance standard required.
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Terima KasihJl. Jend. Gatot Subroto Kav. 18
Jakarta Selatan 12950
www.indonesiapower.co.id
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