Question

Физика 10 Термодинамика В котельной электростанции за 10 часов работы сожжено 100 тонн топлива с теплотой сгорания 29300 кДж/кг. Найти количество выработанной электроэнергии и среднюю мощность станции , если КПД составляет 20%

Answer 1

Процессы:

В котельной за определенное время было сожжено некое кол-во топлива.  Найти кол-во выработанной электроэнергии и мощность ТЭЦ , если КПД 0,2 .

Дано:

t= 36000 c
m= 100000 кг
q= 29300000 Дж/кг
η= 0,2

A-?
P-?

Решение:

η= A полезная/ A затраченная

A полезная= qm
A= 29300000 Дж/кг* 100000 кг= 2`930`000`000`000 Дж

0,2= 2`930`000`000`000/ A затраченная

A затраченная= 14`650`000`000`000 Дж   .

P= A/t
P= 14`650`000`000`000/ 36000= 406МВт .

Ответ: Средняя мощность станции= 406 МВт , Кол-во выработанной электроэнергии= 2`930`000`000`000 Дж   .

Answer 2

Calculating the Amount of Generated Electrical Energy and the Average Power of the Station

To calculate the amount of generated electrical energy and the average power of the station, we can use the following formulas:

1. The amount of generated electrical energy (E) can be calculated using the formula: E = Q * η where: - E = amount of generated electrical energy - Q = heat energy obtained from burning the fuel - η = efficiency of the power station

2. The average power of the station (P) can be calculated using the formula: P = E / t where: - P = average power - E = amount of generated electrical energy - t = time taken for the process

Calculation

Given: - Amount of fuel burned (Q) = 100 tons = 100,000 kg - Heat of combustion of the fuel = 29300 kJ/kg - Efficiency of the power station (η) = 20% - Time taken for the process (t) = 10 hours = 10 * 3600 seconds (since 1 hour = 3600 seconds)

Using the given data, we can calculate the amount of generated electrical energy and the average power of the station.

1. Calculating the amount of generated electrical energy (E): E = Q * η E = 100,000 kg * 29300 kJ/kg * 0.20 E = 586,000,000 kJ

2. Calculating the average power of the station (P): P = E / t P = 586,000,000 kJ / (10 * 3600 s) P ≈ 16277.78 kW

Results

Therefore, the amount of generated electrical energy is approximately 586,000,000 kJ, and the average power of the station is approximately 16277.78 kW.

I hope this helps! If you have any further questions or need additional assistance, feel free to ask.