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Jess ThorsenFriday, 31 May 20245 min read

Diesel Generators: Future Prospects and Regulatory Insights

In an era where sustainability and environmental consciousness are at the forefront of global conversations, the future of diesel generators (DGs) appears uncertain. With the rising concerns over emissions and the push towards cleaner energy alternatives, many have questioned the viability of diesel-powered backup power solutions.

However, amidst these uncertainties, there are still several factors to consider when evaluating the prospects of diesel generators.

This article explores:

  • How diesel generators continue to play a role in critical power supply
  • Regulatory and compliance challenges they face
  • Fuel choices (e.g., HVO) and maintenance strategies for long-term relevance

Key Takeaways

  • Diesel generators remain essential for reliable backup power in critical industries.
  • Stricter environmental regulations demand compliance and smarter fuel choices such as HVO.
  • Proactive maintenance and hybrid strategies help extend the lifespan and reduce impact.
  • Natural gas and energy storage solutions are emerging as complementary alternatives.

 

Emergency Power: Is there still a Future in Diesel?

Despite the growing popularity of renewable energy sources and the increasing emphasis on reducing carbon footprints, diesel generators continue to play a crucial role in providing backup power in various industries.

Why diesel generators still matter: 

  • Batteries/renewables may not support extended critical load periods.
  • Diesel generators provide robust, dependable backup for hospitals, data centers, and telecom.
  • ICE-based (Internal Combustion Engines) diesel generators remain reliable and cost-effective, without limitations on operational hours.

Discover: Diesel generator brochure

 

Emergency Power: Understanding Regulatory Bodies, Compliance, and Considerations

In recent years, regulatory bodies worldwide have implemented stringent emissions standards and regulations to mitigate the environmental impact of diesel generators.

Why compliance matters

  • Avoid fines and reputational damage.
  • Stay informed about regulatory updates; ensure DGs meet evolving standards.

Operational considerations for emergency power:

  • Fuel storage practices and documentation
  • Maintenance and testing procedures to ensure reliability
  • Extending the life of the installed base by applying the latest, most environmentally friendly solutions avoids unnecessary replacements (and resource use).

 

HVO (Hydrotreated Vegetable Oil) vs. Diesel: A Comparison and Potential Savings?

As the demand for cleaner and more sustainable fuel alternatives grows, hydrotreated vegetable oil (HVO) has emerged as a promising alternative to traditional diesel fuel.

HVO is produced from second-generation renewable sources, such as waste materials from vegetable oils and animal fats, through a hydroprocessing technique that removes impurities and reduces emissions.

Compared to diesel fuel, HVO offers lower greenhouse gas emissions and improved air quality without compromising on the operational performance of the engines. Conveniently, HVO can be used as a drop-in replacement for diesel fuel without requiring modifications to existing diesel engines, making it a convenient and cost-effective option for reducing your environmental impact.

Check out: (Case Study) EcoDataCenter - embracing sustainability with HVO100


Maintenance Strategies of Power System: Deep Dive (Emergency Power)

Effective maintenance strategies are essential for ensuring the reliable performance of your diesel generators. Regular maintenance procedures, including routine inspections, fluid checks, and load testing, will help you identify potential issues and prevent unexpected downtime.

Additionally, by using proactive maintenance measures such as predictive analytics and condition monitoring you can anticipate and address issues before they escalate, improving your overall system reliability and performance.

By implementing comprehensive maintenance strategies, you can minimize the risk of equipment failure and optimize the lifespan of your diesel generators. Using a service approach that minimizes the use of fossil-based products ( e.g., lube oil) further limits the footprint of operations and thereby contributes to lowering the environmental impact.

See what others have done: References

 

Emergency Power: Natural Gas - Where/How Is It Possible?

Natural gas has emerged as a cleaner alternative to diesel fuel, offering lower emissions and reduced environmental impact.

In regions where natural gas infrastructure is readily available, transitioning to natural gas generators can offer you significant benefits in terms of cost savings and environmental sustainability.

Key benefits include: 

  • Lower emissions: Significant reductions in NOₓ, CO₂, and particulate matter.

  • Reduced operating costs: Stable fuel pricing and cleaner combustion extend service intervals.

  • Quieter operation: Natural gas engines typically generate less noise and vibration than diesel.

However, the feasibility of natural gas generators varies depending on several factors:

  • Fuel supply availability and the stability of local infrastructure

  • Installation and permitting requirements within each region

  • Operational demands, such as response time and load profile

  • Regulatory compliance, especially regarding emissions and safety standards

Organizations considering natural gas as an alternative fuel source for emergency power should conduct thorough feasibility studies covering technical, economic, and regulatory aspects. Partnering with an experienced energy provider ensures the system is both compliant and optimized for long-term reliability.

In some cases, where gas genset performance does not fully meet operational needs, hybrid solutions can bridge the gap. By combining technologies such as Battery Energy Storage Systems (BESS) with conventional generators, businesses can:

  • Reduce environmental impact
  • Maintain grid independence
  • Ensure reliable coverage of critical loads — using today’s proven technology while preparing for tomorrow’s sustainable energy mix.


Read also:
Secure critical operations - gas generator set


Summary

While diesel generators face challenges in the evolving energy landscape, they still hold promise as a reliable and cost-effective solution for backup power.

By looking towards life extension by using modern fuels, optimizing maintenance and service, you can ensure the continued use of technologies already manufactured.

By staying informed about regulatory developments, exploring alternative fuel options, and implementing effective maintenance strategies, you ensure the continued reliability and performance of your diesel generators now, and in the years to come.

In summary:

  • Diesel generators still provide reliable backup power where it matters most.
  • Compliance, alternative fuels, and optimized maintenance are key to their future.
  • Hybrid solutions and natural gas offer pathways to balance reliability with sustainability.

Do diesel generators still have a role in a low-carbon future? Yes, where long-duration backup is required, DGs remain the most dependable choice for critical facilities.
How does HVO compare to conventional diesel? HVO is a drop-in fuel from renewable feedstocks that lowers GHG emissions and improves air quality without sacrificing performance.
What are the top compliance priorities for DG operators? Monitor evolving emissions regulations, maintain accurate records, and align fuel storage, testing, and maintenance with current standards.
Which maintenance steps make the biggest difference? Routine inspections, fluid checks, and load testing—plus predictive analytics/condition monitoring—to prevent failures and extend lifespan.
When does natural gas make sense for emergency power? Where gas supply and infrastructure are available, and when project goals include lower emissions and potential operating cost benefits.
How can hybrid strategies reduce impact without risking reliability? By combining DGs with BESS/renewables to handle short events efficiently, while DGs cover extended outages, optimizing both sustainability and resilience.


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Jess Thorsen

Jess Thorsen is the CTO og Emergency Power at Bertel O. Steen Power Solutions, bringing more than 20 years of expertise in electrical engineering, project management, business planning, and quality management. His career includes leadership roles at Coromatic A/S, where he headed business areas in both Power and Emergency Power, driving strategy, securing resources, and overseeing P&L. Jess holds a Diploma in Leadership from Copenhagen Business Academy and is a certified electrician from Frederiksberg Tekniske Skole and Holbæk Tekniske Skole.

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