Burning fuel and a motor's efficiency

In summary, burning fuel in a motor is necessary to generate energy for motion. The type and quality of fuel used directly affects the efficiency of the motor, with higher quality fuels resulting in better performance and fuel economy. Several factors contribute to a motor's efficiency, including design, maintenance, and driving habits. Burning fuel in motors also has negative environmental impacts, but using alternative fuels or electric motors can help mitigate these effects.
  • #1
Karol
1,380
22

Homework Statement


A motor burns 20 liter per hour. the fuel's combustion heat is 6.6E6[cal/liter] (i don't know if it's kcal or cal, but i assume it's cal). the motor produces 40 [Hp], what's the efficiency.

Homework Equations


1[Hp]=746[W]. 1[W]=[Joule/sec]
1[cal]=4.186[Joule]

The Attempt at a Solution


40[Hp]x746x3600=107,424,000[Joule/hour]
20[liter]x6.6E6[cal/liter]=13.2E7[cal/hour]
13.2E7[cal/hour]/4.186=31,533,684[Joule/hour]
The fuel supplies less power the the motor's output. not true
 
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  • #2
1[cal]=4.186[Joule]

13.2E7[cal/hour]/4.186...
 
  • #3
Thanks
 

FAQ: Burning fuel and a motor's efficiency

What is the purpose of burning fuel in a motor?

Burning fuel in a motor is necessary to generate energy that is converted into motion. The fuel ignites inside the motor, causing a controlled explosion that moves the pistons and ultimately powers the vehicle or machinery.

How does burning fuel affect a motor's efficiency?

The efficiency of a motor is directly impacted by the quality and type of fuel being burned. Higher quality fuels, such as premium gasoline, burn more cleanly and efficiently, resulting in better performance and fuel economy. On the other hand, lower quality fuels or fuels with impurities can decrease a motor's efficiency and potentially cause damage.

What factors contribute to a motor's efficiency?

Several factors can affect a motor's efficiency, including the design and size of the motor, the type and quality of fuel being used, the condition of the motor's components, and external factors like temperature and altitude. Regular maintenance and using high-quality fuel can help improve a motor's efficiency.

How can you improve the efficiency of a motor?

One way to improve a motor's efficiency is by using higher quality fuel. This can result in a cleaner burn and better performance. Additionally, regular maintenance and proper tuning can help optimize a motor's performance and efficiency. Driving habits, such as avoiding rapid acceleration and maintaining a steady speed, can also contribute to better fuel economy.

What are the environmental impacts of burning fuel in motors?

Burning fuel in motors produces emissions that can have negative impacts on the environment. These emissions contribute to air pollution and can also contribute to climate change. Using alternative fuels or electric motors can help reduce these environmental impacts.

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