What is the efficiency of fuel cells?
A conventional combustion-based power plant typically generates electricity at efficiencies of 33 to 35%, while fuel cell systems can generate electricity at ef- ficiencies up to 60% (and even higher with cogeneration).
How do you calculate conversion efficiency?
For an electrical power conversion process, efficiency is measured simply by dividing the output power in watts by the input power in watts and is expressed as a percentage. In power electronics, the Greek letter eta (η) is used to represent efficiency. See Figure 1.
What is thermodynamic efficiency of fuel cell?
The fuel cell thermodynamic efficiency is given by the ratio of the Gibbs function change to the Enthalpy change in the overall cell reaction. The Gibbs function change measures the electrical work and the enthalpy change is a measure of the heating value of the fuel.
How do you measure the efficiency of a fuel cell?
The standard method for calculating the efficiency of a fuel cell power plant or other electrical generation device is to divide the electricity produced by the HHV of the fuel used.
What is the formula for calculating the efficiency of a machine?
To calculate the efficiency of a machine, divide the output work by the input work and multiply the result by 100 percent.
Why Efficiency has no unit?
We express efficiency as a percentage. In other words, it has no units (Percent is NOT a unit.). If you look at the efficiency equation at the right, you can see why efficiency has no units. Notice that the SI unit for work out is Joules, which is the same as the SI unit for work in.
What does efficient mean in simple words?
1 : productive of desired effects especially : capable of producing desired results with little or no waste (as of time or materials) an efficient worker efficient machinery.
How do you describe efficiently?
performing or functioning in the best possible manner with the least waste of time and effort; having and using requisite knowledge, skill, and industry; competent; capable: a reliable, efficient assistant. satisfactory and economical to use: Our new air conditioner is more efficient than our old one.
Is quickly and efficiently the same?
As adjectives the difference between quick and efficient is that quick is moving with speed, rapidity or swiftness, or capable of doing so; rapid; fast while efficient is efficient.
What is a good synonym for efficiently?
Some common synonyms of efficient are effective, effectual, and efficacious.
Does efficient mean faster?
Spoiler alert: They’re not. Speed (or velocity, if you prefer) is how quickly you can accomplish a task. Efficiency is a comparison — a ratio — of the useful work performed by a machine or in a process to the total work needed to complete a process. Speed and efficiency are related, but they’re not synonymous.
What is another word for efficiently?
What is another word for efficiently?
| easy | competently |
|---|---|
| easily | effortlessly |
| ably | proficiently |
| well | adeptly |
| expertly | fluently |
How do you describe an efficient person?
someone who is efficient works well and quickly and is good at organizing their work in the way that gets the best results.
What is another word for time efficient?
What is another word for timesaving?
| effective | streamlined |
|---|---|
| economical | resourceful |
| laborsaving | orderly |
| saving | well ordered |
| cost-effective | well-planned |