This is one of the most important considerations for our customers. Gas engine solutions offer very competitive installed costs/kW for projects that are just a few hundred kWs to those with multiple MW installations.

You’ll want to determine how much gaseous fuel your power plant will consume. Typically, 75% of the cost of energy produced is the cost of fuel, so efficiency is very important.

Jenbacher* gas engines are highly efficient, with the maximum electrical efficiency reaching well over 45%. Both Jenbacher and Waukesha* equipment work in cogeneration solutions, efficiently converting the primary energy of the gas fuel into electricity and heat. In cogeneration mode, overall efficiency can reach even higher than 90%.

The total production time of Jenbacher or Waukesha gas engine power plant components plus the time for construction and commissioning usually falls between 8 and 16 months (time to Commercial Operation Date). Your time to COD could be even shorter if units are in stock. That means you can start receiving the economic benefits of onsite power generation with gas engines in a fairly short time.

When INNIO designs our solutions, we take into account our equipment’s eventual delivery to the installation sites. Our solutions can be installed in buildings or can be packaged into easily constructed modular structures. For example:

• Jenbacher Type 2, 3, 4 and 6 engines are packaged in standard containers measuring 2.4 and 3 meters wide.
• Jenbacher 920 FleXtra engines typically are built in a very modular design.
• Waukesha engines can also be packaged for power generation.

The modularity of our solutions makes project logistics easier. In addition, ready-to-use solutions allow you to accelerate the commissioning of the project and effectively scale up your power plant in the future.

Another very important factor in determining the choice of technology for a power plant is operational expenditures associated with the installed equipment.

You should consider such aspects as: maintenance intervals, works and spare parts cost, downtime during repairs, and equipment lifecycle duration before overhaul. We recommend customers compare the cost of the equipment’s entire lifecycle.

To minimize equipment downtime during major repairs, Jenbacher has developed long block and short block solutions that deliver overhauled engines that meet the quality and performance standards of our new units. Reach out to one of our experts to learn more.

INNIO also offers multi-year service contracts and Asset Performance Management tools for both Waukesha and Jenbacher engines. These help to reduce the need for spare parts and can predict service events, lowering costs throughout the engine’s lifecycle.

Definitely take this factor into account, especially if you are not going to operate your equipment 24/7 and plan to stop it periodically.

Make sure to check the maximum possible start/stops within the equipment’s lifecycle, which is stipulated by some equipment manufacturers. When such limits are surpassed, the actual equipment lifecycle can be shortened, meaning you’ll need an earlier overhaul. In some cases, power generation equipment manufacturers might even require additional service payments for every start.

If you consider using gas engines, our experts can advise you whether this factor is applicable for your particular project depending on planned start/stop events frequency.

INNIO experts can help you select equipment that suits your requirements by analyzing your project’s load profile. Because our INNIO gas engine product line covers a wide range of power outputs—from 0.2 to 10.4 MWs—we can help you find a solution that fits your specific application.

You also should determine how quickly you need your power generation equipment to reach a given capacity—a factor that is especially relevant for such applications as data centers, medical institutions, oil & gas, and grid firming/peaking applications.

The standard startup time for Jenbacher gas engines is 5 minutes from initializing the start to reaching full output. Some Jenbacher Type 4 engines can reach full output in less than 2 minutes and a special version of our J620 engine achieves a full 3 MW of electric output in less than 45 seconds. The J920 FleXtra, our 10.4 MW engine, can reach full power in less than 3 minutes.

Time to full power output may vary depending on technology and model. In some cases, it could take longer than 10 minutes to reach full power and for complex application it could take even more than 30 minutes. We suggest to look closer at this aspect if maneuverability is an important factor for your project.

Another important consideration is the ability to work efficiently in isolated modes, with unstable loads. Special versions of the Waukesha engine 7044 GSI have the ability to ramp up to full power output in 2 steps, handling 70% of nominal power within the first step. This is especially relevant when equipment demands high load acceptance, e.g. for drill rigs or industrial mills.

If you plan to run equipment at partial load for significant periods of time, you’ll want to seriously consider potential efficiency reduction issues. Equipment usually reaches the nominal efficiency parameters at rated power output, but at partial load, efficiency may be lessened. For INNIO gas engines, this efficiency decrease is quite moderate, while for other types of power generating equipment, it can be much more significant.

Moreover, our experts can consult with you about selecting engines that best fit your load profile, thereby decreasing periods of partial equipment load.

The ambient conditions under which you will operate your equipment can have a big impact on its actual power output capacity. In other words, under certain conditions your power output may be much lower than the rated power level. Pay attention to this factor if you plan to operate the equipment at high temperatures and/or at an altitude significantly above sea level.

Our gas engines typically provide full output up to 30°C (86°F) and more. Waukesha gas engines keep rated power outputs up to 1,500 meters (approximately 5,000 feet) above sea level.

Contact our experts to find out more.