Question

Для работы теплового двигателя с КПД 16% запасена нефть массой 5,4 т. Определите, на сколько дней хватит запаса топлива, если средняя мощность двигателя во время работы 15 кВт, рабочий день составляет 8 ч.

Answer 1

$n=\frac{N_1}{N_2} =\frac{N_1}{\frac{A}{t} } = \frac{N_1t_0N}{Q} = \frac{N_1t_0N}{qm} =$

$N=\frac{nqm}{N_1t_0}$

$N=\frac{0.16*44000000Dg/kg*5400kg}{15000Vt*28800s} \approx88$

Ответ: на 88 дней

Answer 2

Calculating Fuel Consumption for a Thermal Engine

To calculate how long the fuel reserve will last for a thermal engine with an efficiency of 16%, we can use the following formula:

Fuel consumption (in kg/h) = Power output (in kW) / Efficiency (%)

Given: - Efficiency (η) = 16% - Fuel reserve = 5.4 tons - Average power output = 15 kW - Working hours per day = 8 hours

Calculating Fuel Consumption

Using the given efficiency and power output, we can calculate the fuel consumption per hour.

Fuel consumption (in kg/h) = 15 kW / 16%

This will give us the fuel consumption per hour.

Converting Fuel Consumption to Daily Consumption

Once we have the fuel consumption per hour, we can calculate the daily fuel consumption by multiplying the hourly consumption by the number of working hours per day.

Daily fuel consumption (in kg/day) = Fuel consumption (in kg/h) * Working hours per day

Determining Fuel Reserve Duration

Finally, we can determine how many days the fuel reserve will last by dividing the total fuel reserve by the daily fuel consumption.

Days of fuel reserve = Fuel reserve (in kg) / Daily fuel consumption (in kg/day)

Let's calculate the fuel consumption and the duration of the fuel reserve based on the given parameters.

Calculation

First, let's calculate the fuel consumption per hour using the given power output and efficiency.

Fuel consumption (in kg/h) = 15 kW / 16% Fuel consumption (in kg/h) = 15 kW / 0.16 Fuel consumption (in kg/h) = 93.75 kg/h Now, we can calculate the daily fuel consumption.

Daily fuel consumption (in kg/day) = 93.75 kg/h * 8 hours/day Daily fuel consumption (in kg/day) = 750 kg/day

Finally, we can determine the duration of the fuel reserve.

Days of fuel reserve = 5,400 kg / 750 kg/day Days of fuel reserve ≈ 7.2 days

Based on the given parameters, the fuel reserve of 5.4 tons will last approximately 7.2 days with the specified average power output and working hours per day.