Task $5$

A hydraulic dynamometer is used to calculate the Brake Power of braking systems as shown:

Given that a $4$ cylinder, $4$ stroke engine gave the following test results:

Shaft Speed N $=2600re\frac{v}{m}in$

Torque arm R $,=16cm$

Net Brake Load F $=220N$

Fuel consumption $m_f=2\frac{g}{s}$

Calorific Value $(CV)=42M\frac{J}{k}g$

Determine the following:

a$)$ Brake Power; b$)$ Fuel Power; c$)$ Brake Thermal Efficiency.

By increasing and decreasing the brake thermal efficiency, compare the impact this has on the shaft speed or net brake load.