# The river hydrofoil vessel develops a power of 1,500 kW with an efficiency of 30%.

The river hydrofoil vessel develops a power of 1,500 kW with an efficiency of 30%. determine the fuel consumption per 1 km of track at a speed of almost 72 km / h. specific heat of combustion of fuel 500 mJ / kg

Given: N (ship power) = 1500 kW = 1500 * 10 ^ 3 W; η (ship efficiency) = 30% = 0.3; S (distance traveled) = 1 km = 1000 m; V (river vessel speed) = 72 km / h = 20 m / s; q (specific heat of combustion of fuel) = 500 MJ / kg = 500 * 10 ^ 6 J / kg.

To determine the fuel consumption of a hand-held hydrofoil vessel, we apply the formula: η = N / Nz = N / (Q / t) = N * t / (q * m) = N * (S / V) / (q * m) = N * S / (q * m * V) and m = N * S / (q * V * η).

Calculation: m = 1500 * 10 ^ 3 * 1000 / (500 * 10 ^ 6 * 20 * 0.3) = 0.5 kg.

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