Restart & Reliability Recovery of Captive Power Plant for Silvermill Group

A comprehensive case study demonstrating expert support for the successful restart and modernization of a 4.0 MW biomass combined heat & power plant in Sri Lanka after nearly two years of shutdown during the country's economic crisis.

Client Introduction: Silvermill Group

Silvermill Group stands as one of Sri Lanka's most prominent diversified industrial conglomerates, with a strong foundation in food & beverages and agribusiness. The company has built an impressive export-oriented footprint, particularly in value-added coconut products that reach international markets. Beyond its core agricultural business, Silvermill has strategically expanded into the Power & Energy sector as part of its comprehensive business portfolio diversification strategy. The group's commitment to sustainable energy solutions led to the development of a biomass combined heat & power

(CHP) facility through KMRI-SMG Asset Company. This innovative plant was designed with dual purposes: supplying electricity for Silvermill's own industrial operations while contributing excess capacity to Sri Lanka's national grid. The facility represents a 4.0 MW installed capacity project that was documented in a comprehensive 2015 Environmental

Impact Assessment. This strategic investment in captive power generation reflects Silvermill's forward-thinking approach to operational independence, cost management, and environmental responsibility positioning the company to maintain competitive advantages in both domestic and international markets.

CoreBusiness

Food & beverages, value-added coconut products with strong export presence

PowerCapacity

4.0 MW biomass CHP facility for industrial use and grid supply

Strategic Focus

Operational independence through sustainable energy generation

The Challenge:Extended Shutdown During National Crisis

In 2015, we successfully supplied and commissioned the complete electrical and automation system for the captive power plant operated by KMRI-SMG. The facility operated reliably for several years, providing critical power generation capacity for Silvermill's industrial operations and contributing to Sri Lanka's national grid stability. However, during 2022, Sri Lanka faced an unprecedented convergence of challenges that severely impacted industrial operations nationwide. The country experienced a profound economic crisis characterized by widespread shortages of essential goods, fuel scarcity, and prolonged power outages that disrupted both residential and industrial consumers. This period was further complicated by significant political unrest and social instability that affected business operations across all sectors. In this challenging context, Silvermill's power plant operations were forced to cease, and the facility remained completely idle for nearly two years. Extended shutdowns of power generation equipment present unique technical challenges systems that remain dormant for prolonged periods can develop hidden failures, environmental degradation, and operational risks that only become apparent during restart attempts. Components may corrode, seals can dry out, control systems may drift, and electrical connections can degrade. As conditions began to stabilize and the economic outlook improved, Silvermill made the strategic decision to restart the plant and restore its power generation capabilities. Recognizing the complexity and risks associated with restarting a facility after such an extended idle period, the company reached out to our

team with a comprehensive set of objectives designed to ensure a safe, reliable, and sustainable return to operations.

Review Plant Condition

Comprehensive assessment of machinery and systems after extended idle period to

identify potential issues before energization

Validate Systems

Complete verification of automation and electrical systems integrity before re-energization to prevent equipment damage

Support Phased Restart

Structured, step-by-step restart process to ensure safe and reliable return to stable

operating conditions

Upgrade Recommendations

Strategic roadmap for modernization and critical spares to prevent future downtime

and improve long-term reliability

Our Approach: Structured Restart & Recovery Solution

Understanding the critical nature of safely restarting a power generation facility after nearly two years of inactivity, Silvermill Group requested comprehensive hands-on support from our experienced team. We responded by mobilizing a two-person expert team to travel to Sri Lanka and execute a carefully structured restoration plan that would address both immediate restart requirements and long-term reliability objectives. Our approach was built on three fundamental pillars: thorough pre-energization assessment, controlled phased restart execution, and forward-looking upgrade planning. This methodology ensures that hidden risks are identified before they can cause equipment damage or safety incidents, that the restart process proceeds in a controlled manner with continuous validation, and that the facility is positioned for improved future performance. The engagement required our team to work closely with Silvermill's operations and maintenance personnel, transferring knowledge and building local capability while executing the technical restoration work. This collaborative approach ensures sustainable results that extend beyond our on-site presence, empowering the client team with enhanced understanding of their systems and improved readiness for future operational scenarios.

Plant Health Review

Comprehensive assessment before energization

Phased Restart

Controlled step-by-step commissioning

Future-Proofing

Upgrade roadmap and spares strategy

Phase1: Comprehensive Plant Health Review

Before any electrical systems could be safely energized, our team conducted an exhaustive plant health review designed to identify potential failure modes and hidden degradation that commonly develops during extended shutdown periods. This critical first phase serves as the foundation for safe restart operations, preventing costly equipment damage and potential safety incidents that can occur when dormant systems are energized without proper validation.

Electrical Systems Assessment

Our team performed detailed visual and functional inspections of all key electrical panels, protection devices, and critical interlock systems. This included verification of circuit breaker mechanisms, contactor condition, relay functionality, and the integrity of power distribution equipment. Special attention was given to identifying any signs of moisture ingress, corrosion, loose connections, or component degradation that could compromise system safety or reliability. Protection systems received particularly thorough scrutiny, as these safety-critical devices must function flawlessly to prevent catastrophic equipment failures. We validated protection settings, tested trip circuits, and confirmed that all safety interlocks remained functional and properly calibrated.

Automation & Control Verification

The automation systems underwent comprehensive readiness assessment, including input/output health checks, control logic integrity verification, alarm system functionality, and backup system validation. We examined programmable logic controllers (PLCs), distributed control systems (DCS), and all associated instrumentation to ensure that control algorithms remained intact and that no corruption had occurred during the idle period. Communication networks and instrumentation loops were systematically tested to identify any "restart surprises" unexpected failures that only become apparent when systems are brought back

online. This proactive approach allows issues to be addressed in a planned manner rather than during emergency response situations.

1. Visual Inspection

Comprehensive walk-through of all electrical panels, control cabinets, and equipment for signs of degradation, moisture, or damage

2. Functional Testing

Systematic validation of protections, interlocks, control logic, and instrumentation without energizing main power systems

3. Risk Assessment

Identification and prioritization of issues requiring immediate attention versus those that can be addressed during future maintenance windows

4. Readiness Report

Detailed documentation of findings with go/no-go recommendations for proceeding to energization phase

Phase2: Controlled Phased Restart & Stabilization

Following successful completion of the plant health review and resolution of critical findings, we proceeded with the carefully orchestrated restart sequence. This phase represents the most critical and risk-intensive portion of the recovery process, requiring expert judgment, continuous monitoring, and the ability to quickly diagnose and respond to unexpected

conditions. Our phased approach minimizes risk by bringing systems online incrementally, validating functionality at each stage before proceeding to the next level of complexity.

1. Auxiliary Systems

Initial energization of support systems including cooling, lubrication, and control power circuits with comprehensive checkout

2. Control Activation

Gradual activation of automation systems, verification of control loops, and validation of operating sequences

3. Protection Verification

Functional testing of all protection systems and safety interlocks under actual operating conditions

4. Main System Start

Guided start-up of primary power generation equipment with continuous monitoring and adjustment

5. Load Stabilization

Progressive loading to rated capacity while monitoring all critical parameters for stable

operation

Each restart phase was executed with meticulous attention to detail, following proven commissioning protocols adapted to the specific challenges of a long-dormant facility. Our team maintained continuous communication with plant operations personnel, providing real-time guidance and making necessary adjustments to control parameters as systems stabilized. This hands-on approach allowed us to identify and resolve minor issues before they could escalate into significant problems. The phased methodology proved particularly valuable in validating that all protection and safety systems functioned correctly under actual operating conditions rather than just during offline testing. This real-world validation provides

confidence that the plant can operate safely and reliably under normal conditions and will respond appropriately to abnormal situations or equipment faults. By the conclusion of this phase, the plant had achieved stable operating conditions across all critical parameters, with all systems functioning within design specifications and ready to support sustained power

generation operations

Phase 3: Future-Proofing Through Strategic Upgrades

With the plant successfully restarted and operating in a stable condition, our engagement shifted focus to ensuring long-term reliability and positioning the facility for enhanced performance going forward. This future-proofing phase represents a critical value-add that extends far beyond basic restart support it provides Silvermill with a clear roadmap for continuous improvement and reduced operational risk.

Technology Modernization Roadmap

Our team identified specific areas where targeted technology upgrades would deliver significant improvements in reliability, efficiency, and maintainability. These recommendations

focused on critical sections of the electrical and automation systems where component obsolescence, wear, or technological advancement made replacement or upgrade particularly valuable. The upgrade roadmap was structured with realistic timelines and priorities, recognizing budget constraints and operational availability windows. We distinguished between urgent modernization needs that should be addressed within the

next 12 months, medium-term improvements suitable for the 1-3 year timeframe, and longer-term enhancements that could be incorporated during major maintenance outages or capacity expansion projects. Each recommendation included clear justification based on

failure risk reduction, performance improvement potential, maintenance cost savings, or regulatory compliance considerations. This evidence-based approach helps Silvermill

make informed capital investment decisions and build support for necessary expenditures among stakeholders.

Critical Spares Strategy

Extended shutdowns can expose gaps in spare parts inventory that may have been adequate for normal operations but prove insufficient during restart scenarios. Our team

developed a comprehensive critical spares recommendation based on failure impact analysis and realistic lead time assessments for key components. The spares strategy prioritized items that combine high failure consequence with long procurement lead times these represent the greatest operational risk and deserve inventory investment. We also identified opportunities for condition- based maintenance approaches that could reduce spares carrying costs while maintaining appropriate risk coverage. By implementing this strategic spares approach, Silvermill can significantly reduce exposure to unexpected downtime costs while optimizing working capital tied up in inventory. The recommendations provide clear guidance on what to stock, at what quantities, and with what refresh frequency to maintain readiness.

Immediate Priority

Critical component replacements and essential software updates to address highest-risk items within 12 months

Medium-Term Upgrades

Performance enhancement projects and technology refresh for key subsystems over 1-3 year horizon

Long-Term Vision

Strategic modernization aligned with capacity expansion and industry best practices for 3-5 year timeframe

Measurable Outcomes: Operational & Business Results

The comprehensive restart and recovery engagement delivered substantial value across both operational and business dimensions, validating Silvermill's decision to invest in expert support rather than attempting an unassisted restart. These outcomes demonstrate how structured technical intervention during critical recovery scenarios can generate returns that far exceed the engagement cost through risk reduction, accelerated timelines, and improved long-term positioning.

Successful Restart Execution

Plant safely returned to stable operation after nearly two years of shutdown using structured,

phased commissioning methodology that identified and resolved issues proactively rather than reactively.

Risk Mitigation Achievement

Zero safety incidents and zero equipment damage during restart process, with comprehensive identification of hidden faults that typically emerge after extended idle periods preventing costly emergency repairs.

System Reliability Restoration

All automation and electrical systems validated and returned to full functionality, with documented confidence in protection systems, control sequences, and operational safety measures.

Strategic Roadmap Delivery

Clear upgrade and spares strategy created for improved long-term readiness, with prioritized

recommendations that balance risk reduction with budget realities and operational constraints.

Accelerated Return to Service

Faster restoration of self-generation capability for internal operations compared to unassisted restart attempts, reducing exposure to grid dependency and associated power cost volatility.

Downtime Cost Reduction

Significant reduction in future downtime risk through implemented spares planning and

upgrade roadmap, with clear financial justification for preventive investments based on avoided outage costs.

"The structured approach and expert guidance during our restart was invaluable. We avoided what could have been a costly and risky process, and now have clear direction for maintaining and improving our facility's reliability going forward."

The Value of Expert Partnership in Recovery Scenarios

This engagement with Silvermill Group exemplifies the critical value that an experienced technology partner brings during recovery and restart scenarios particularly following extended shutdown periods where hidden risks and degradation can threaten both safety and equipment integrity. The successful outcome demonstrates several key principles that apply broadly across industrial power generation facilities facing similar challenges.

Structured Methodology Reduces Risk

The phased approach to assessment, restart, and future planning provides a proven framework that systematically addresses the unique challenges of dormant facilities. This methodology prevents the common pitfall of rushing to energize systems without adequate validation, which often leads to equipment damage, safety incidents, or prolonged troubleshooting that extends downtime far beyond what structured commissioning requires.

On-Site Expert Deployment

Having experienced specialists physically present during critical restart phases

provides real-time problem-solving capability and immediate response to unexpected conditions that cannot be effectively addressed through remote support alone. This hands-on presence accelerates resolution and builds client team confidence.

Comprehensive Pre-Energization Assessment

Thorough validation before applying power prevents the majority of restart failures and equipment damage scenarios. This investment in upfront assessment consistently proves far more cost-effective than repair and recovery from energization accidents.

Beyond Restart to Continuous Improvement

Value-added engagements extend beyond immediate restart needs to position clients for improved long-term performance through strategic upgrade planning and spares optimization. This forward-looking approach transforms a reactive crisis response into a proactive reliability enhancement program.

The Silvermill project also highlights the importance of maintaining long-term relationships with equipment and system suppliers. Our ability to respond quickly and effectively was significantly enhanced by our intimate knowledge of the original installation, detailed understanding of system architecture, and access to historical documentation and configuration data. This continuity provides substantial advantages over engaging unfamiliar service providers who must invest significant time in system learning before delivering value.

For asset owners operating critical power generation facilities, the lesson is clear: establishing and maintaining relationships with proven technology partners pays dividends during both routine operations and recovery scenarios. These partnerships provide access to specialized expertise, rapid mobilization capability, and institutional knowledge that can mean the difference between successful recovery and extended costly downtime.

Conclusion: Positioning for Sustainable Reliability

The successful restart and recovery of Silvermill Group's captive power plant represents more than just a technical achievement it demonstrates the tangible value of expert partnership during critical operational challenges. By deploying an experienced team on-site, executing a structured phased restart methodology, and providing a comprehensive upgrade and spares roadmap, we helped Silvermill restore their facility safely while positioning it for enhanced reliability and efficiency going forward. As Sri Lanka's economy continues to recover and industrial operations normalize, reliable captive power generation will play an increasingly important role in maintaining competitive operations and managing energy costs. Silvermill's proactive decision to invest in expert restart support and future planning

positions the company to capitalize on these advantages while minimizing exposure to grid instability and power cost volatility.

Proven Partnership Model

Long-term relationships with technology suppliers deliver sustained value through rapid response capability, system knowledge continuity, and access to specialized expertise during

both routine and crisis scenarios.

Systematic Risk Management

Structured approaches to restart, commissioning, and upgrade planning consistently outperform ad-hoc methods by identifying and mitigating risks before they manifest as safety incidents or costly equipment failures.

Continuous Improvement Culture

Transforming reactive recovery into proactive reliability enhancement through strategic planning creates sustainable competitive advantages and positions facilities for long-

term operational excellence.

For industrial organizations operating power generation assets, the Silvermill case study offers a replicable model for approaching restart scenarios, managing extended shutdowns, and maintaining operational readiness through economic uncertainty. The combination of technical expertise, structured methodology, and forward-looking strategic planning provides a comprehensive solution that addresses both immediate needs and long-term sustainability objectives.

We remain committed to supporting Silvermill Group's power generation operations and stand ready to assist other industrial organizations facing similar challenges. Our team's expertise in restart scenarios, system recovery, and reliability enhancement programs is available to help asset owners navigate complex operational situations and achieve their performance objectives.