Subtopic: Bio-fuels and their use in farm mechanization
Question Statement:
A dual-fuel agricultural diesel engine runs on a combination of diesel fuel and biomass gasifier producer gas. Under full load on pure diesel fuel, the baseline diesel consumption is $4.0\text{ kg/h}$. When switched to dual-fuel operation at the same load and speed, the engine consumes $1.0\text{ kg/h}$ of diesel along with producer gas. The diesel replacement percentage achieved by the biomass gasifier is ________ (answer in integer).
Answer Key:
75
Step-by-Step Solution & Explanation
The diesel replacement percentage is given by:
$\%\text{ Replacement} = \frac{\dot{m}_{d,\text{pure}} - \dot{m}_{d,\text{dual}}}{\dot{m}_{d,\text{pure}}} \times 100$
Given $\dot{m}_{d,\text{pure}} = 4.0\text{ kg/h}$ and $\dot{m}_{d,\text{dual}} = 1.0\text{ kg/h}$:
$\%\text{ Replacement} = \frac{4.0 - 1.0}{4.0} \times 100 = \frac{3.0}{4.0} \times 100 = 75\%$