Understanding Dual Fuel Generator: Principle of operation, Benefits & Disadvantages
When we talk about this topic, it means we already know a little bit about generators. Nowadays, humans cannot live without electricity, we need it for lighting, cooking, watching TV, and so on. But for some reason, we have to face power outages, such as in some countries that lack electricity, or power outages due to natural disasters. Generators can help us prevent any losses when we face power outages.
Dual fuel generators, as the name suggests, these machines can use two different fuels, which can be used in different scenarios such as home, factory, construction site, and so on. However, before you decide to buy one, please make sure you really need it and know how to use it or how to maintain it. In this article, we will discuss the dual-fuel generator’s functions, how it works, and its applications.
What is a dual-fuel generator?
A dual-fuel generator, as its name, is designed to use two kinds of fuel as power, you can switch the power when you need to or in some special scenes. Due to mechanical construction, this type of generator is usually gasoline with gas, or diesel with gas. So mostly, this model generator will have a fuel selector knob or button, you only need to use the switch and turn it into another power supply.
Not only dual-fuel generators but also some tri-fuel generators, which can be switched between gasoline, propane, and natural gas. Please pay attention, due to the generator structure, gasoline and diesel can not be used in one model, some generators can only use gasoline and gas, and some generators can only use diesel and gas. So, you can only follow the generator manuals. No matter what kind of fuel you use, you should make sure the generator engine of the old fuel has been cleared.
How does a dual-fuel generator work?
As we know, a dual-fuel generator has two different power resources that can supply the energy for the engine. This model of generator usually has a fuel tank for gasoline or diesel, and it also has backup options for the power resource, it is just like a hybrid car of power generation. It has a specially designed engine that can run two types of fuels. Here are the details below:
The principle of fuel switching
Talking about fuel switching, may not that easy as some people imagined, dual-fuel often uses gasoline and gas as power resources, and these two fuel turns in engines require different air levels. If engines use gasoline as power, then the engine carburetor will start work. If you switch the fuel type button to gas resource, then the fuel injection system will help to work. Both the carburetor and fuel injection system can help to mix the air but with different percent air levels.
Benefits of Using a Dual Fuel Generator
When you have a generator with two types of fuel supply, you will have more choices when facing electricity outages, the detailed benefits as below:
Cost Efficiency & Fuel Availability
If gasoline or diesel runs out or their price is getting higher, we can use gas or propane as an alternative. This kind of flexibility can help you save more money, and can also help you avoid some loss when suddenly fuel runs out.
Extended Runtime & Reliability
Natural gas or propane burns cleaner than gasoline or diesel and also can reduce engine wear and tear. Furthermore, gas or propane is much earlier to be long-term storage, it’s really perfect for those families that require long periods of generator downtime.
Environmental Advantages
Natural gas and propane can produce less air pollution after it’s burned, they only can produce water and CO2. If you’re a fan of the environment, then a dual-fuel generator is a great choice for you.
Disadvantages of dual-fuel generators
We talked about so many benefits of dual-fuel generators, someone must ask if dual-fuel generators have any disadvantages. The answer is yes, although this model of generators has been widely used and is eco-friendly, it still has a few drawbacks.
Gasoline Storage Problem
According to our common sense, gasoline has a very short lifespan, it’s not easy to keep for a long time. If your dual-fuel generator uses gasoline, you should make sure to use it as soon as possible when you get it, otherwise, the gasoline will expire easily. And some countries or cities also have a limit on how much gasoline you can store.
Maintenance Problems
Compared with single-fuel generators, a dual-fuel generator is more expensive to maintain because of its multi-function. We need to keep them well-maintained regularly, to make sure they are in good condition and work efficiently. If you are new to generators and don’t have the relevant generator knowledge, it is advisable not to buy them.
Conclusion
A dual-fuel generator is more than a backup power resource, it’s a lifeline when you and your family face danger due to power outages. It can offer flexibility, reliability, and eco-friendly options, I believe it will be the most helpful member of your family.
FAQs
Can I switch fuels while the generator is running?
No. Always turn off the generator and let it cool before switching fuels to prevent damage.
Which fuel is cheaper: gasoline or propane?
It depends on local prices, but propane is often more cost-effective long-term due to its stability and efficiency.
How long can a dual-fuel generator run continuously?
Most models run 8–12 hours on a full tank, but this varies by fuel type and load.
Are dual-fuel generators safe for indoor use?
Absolutely not! All generators must be used outdoors due to carbon monoxide risks.
Can I use natural gas instead of propane?
Only if your generator is explicitly designed for natural gas. Never attempt to modify it yourself.
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