Enter the h2 to h3 (J), the h1 to h4 (J), and the h2 to h1 (J) into the calculator to determine the Rankine Cycle Efficiency.

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## Rankine Cycle Efficiency Formula

The following formula is used to calculate the Rankine Cycle Efficiency.

Erank = [(h2-h3) - (h1-h4)] / (h2-1) * 100

- Where Erank is the Rankine Cycle Efficiency (%)
- h2 to h3 (J)
- h1 to h4 (J)
- h2 to h1 (J)

## How to Calculate Rankine Cycle Efficiency?

The following example problems outline how to calculate the Rankine Cycle Efficiency.

**Example Problem #1**

- First, determine the h2 to h3 (J). In this example, the h2 to h3 (J) is given as 30 .
- Next, determine the h1 to h4 (J). For this problem, the h1 to h4 (J) is given as 20 .
- Next, determine the h2 to h1 (J). In this case, the h2 to h1 (J) is found to be 15.
- Finally, calculate the Rankine Cycle Efficiency using the formula above:

Erank = [(h2-h3) – (h1-h4)] / (h2-1) * 100

Inserting the values from above and solving yields:

Erank = [30 – 20 ] / (15) * 100 = 66.66 (%)

**Example Problem #2**

Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as:

h2 to h3 (J) = 40

h1 to h4 (J) = 5

h2 to h1 (J) = 100

Enter these given values yields:

Erank = [40- 5] / 100 * 100 = 35** **(%)