For the most demanding industrial applications, fuel selection is a crucial factor in identifying the right type of generator to meet critical power needs. From diesel to hydrotreated vegetable oil or natural gas to propane, numerous options exist — each with unique advantages and potential limitations. This article can help you decide what works best for your specific requirements.

Key Considerations in Fuel Selection

• Load Size and Demand: The initial step in fuel selection involves analyzing load size and demand patterns. Industrial generators have varying efficiency curves based on load characteristics (continuous or standby operation), significantly impacting fuel efficiency and cost-effectiveness. Rehlko's web-based tool Power Solutions Center sizing and specification software can determine the size generator needed based on the site’s electrical load requirement.

• Surrounding Infrastructure: The end-use environment's fuel supply infrastructure directly affects fuel selection. Readily available diesel from a robust road network might favor diesel use, while a connection to a national pipeline system could make natural gas a more compelling option. Local fuel storage capacity for high loads also warrants careful consideration.

• Regulatory Factors: Environmental regulatory constraints also come into play. Local and regional variations in emissions controls in the US, sometimes on a state-by-state basis, can significantly influence your fuel choice.

Comparing Performance of Fuel Options

With those considerations in mind, fuel selection can be narrowed down to options such as diesel and natural gas. The decision will then directly influence the generator model chosen and the type of engine, fuel systems, and enclosures eventually deployed onsite. Below is a performance comparison for some of the primary fuels available.

• Diesel: Diesel is one of the most popular options for industrial generators. It provides excellent performance for reliable emergency backup power, supporting fast start-up in 10 seconds or less. Diesel offers high power density and is readily available across the US. However, it can be more expensive than other fuels, requiring regular maintenance to prevent residue buildup. Rehlko generators can also use hydrotreated vegetable oil (HVO), a renewable fuel from waste products. HVO can be used either pure or as a blend with conventional diesel, reducing lifecycle carbon emissions by up to 90% across the lifecycle.

• Natural Gas: Natural gas is generally more affordable than alternatives like diesel and propane. It is clean burning and efficient, which supports ease of maintenance. Yet, the absence of an on-site gas line necessitates collaboration with utility companies for installation, which could be a potentially time-consuming and expensive undertaking. Additionally, environmental factors like natural disasters can disrupt the natural gas supply.

• Propane: Propane gas (also known as liquid propane or LP) is a solution that provides onsite fuel storage. Onsite fuel storage is a requirement of NFPA 110 Standard for Emergency and Standby Power Systems, so it meets the requirement like diesel fuel typically does. LP gas is often used in rural areas where there is no natural gas utility or where there is a unique requirement for above ground storage of fuel due to environmental regulations in the local area.

The Value of Expert Guidance

Diesel and gaseous fuels all present flexible options. Rehlko and our authorized distributors play a vital role in supporting your fuel selection. Our distributors possess exceptional local code knowledge and insights into potential tax credits, rebates, or grants that incentivize clean energy solutions — helping you make the right decision.

Conclusion

By leveraging the guidance of Rehlko and our authorized distributors, you can confidently select the optimal fuel source to ensure reliable, sustainable generator operation customized to your specific needs. This empowers you to achieve operational excellence while benefiting from exceptional sales, installation, and servicing. Use our interactive distributor locator to locate your nearest Rehlko generator expert quickly and take advantage of bespoke advice and comprehensive support.