The formula to calculate the Brake Thermal Efficiency (ηbth) is:
\[ \eta_{bth} = \frac{BP}{Q} \]
Brake Thermal Efficiency (ηbth) is defined as the brake power of a heat engine as a function of the thermal input from the fuel. Brake Power (BP) is the power obtained at the engine flywheel and is measured with the help of a dynamometer. Heat Energy (Q) is the amount of total heat required.
Let's assume the following values:
Using the formula:
\[ \eta_{bth} = \frac{190000}{4200} \approx 45.2380952380952 \]
The Brake Thermal Efficiency is approximately 45.24%.
| Brake Power (Watt) | Heat Energy (Joule) | Efficiency (ηbth) |
|---|---|---|
| 100000 | 4200 | 2,380.952380952381191% |
| 110000 | 4200 | 2,619.047619047618809% |
| 120000 | 4200 | 2,857.142857142857338% |
| 130000 | 4200 | 3,095.238095238095411% |
| 140000 | 4200 | 3,333.333333333333485% |
| 150000 | 4200 | 3,571.428571428571558% |
| 160000 | 4200 | 3,809.523809523809632% |
| 170000 | 4200 | 4,047.619047619047251% |
| 180000 | 4200 | 4,285.714285714285325% |
| 190000 | 4200 | 4,523.809523809523853% |
| 200000 | 4200 | 4,761.904761904762381% |