How can one describe the procedure for calculating the condenser power given turbine power, condensing pressure, live steam temperatures and pressures?
Efficiencies are also given.
Why do wind turbines always use a three-bladed propeller and not one with 5, 7, 9 or 12 blades?
Why don't more blades produce more power? Is there an efficiency that maximizes at three?
Thermodynamic efficiency of a steam engine?
For a physics presentation, we need to explain the thermodynamic efficiency of a steam engine using a calculation. Can anyone help us? Thanks!
Efficiency?
Hello, how do you calculate this task: How long must a hotplate (P= 3.0kW) be in operation to bring 1.5 l of water at a temperature of 20 degrees Celsius to a boil if the efficiency of the hotplate is 80%? Thanks for the answers
Is there any way to utilize the 50°C warm exhaust air from a device?
At my university, I work with several distillers. These blow 50°C warm exhaust air into the room with a decent airflow. After 3 hours, for example, two have done their work, and the room temperature has risen by 4°C. Does anyone have any ideas what to do with such warm air? I'm a trained plumber,…
Efficiency of motor and frequency converter?
Can someone explain why Eta_Fu isn't in the denominator of problem a), but instead it's in the denominator of problem b). In problem b), the current from the grid must have an efficiency of 1, and in problem a), the motor loses the power that is lost due to the efficiency. And why wasn't the…
Same effect?
Hello. I consume about 400 mg of caffeine daily in the form of energy drinks. I now plan to switch to caffeine tablets for practical reasons. The effect of 2 x 200 mg caffeine tablets should be the same, right?
How do I calculate Pzu correctly?
Given: η=80% Pab=1.5kw Calculate: 1) η=Pzu÷Pab (rearrange the formula) Pzu=Pab×η = 0.8 × 1.5 kw= 1.2kw Or: 2) Pzu=Pab÷η = 1.5kw ÷ 0.8 = 1.875kw I mean 2 is the right way, right?
[Physics] Calculate electrical power after transformation?
Good day, I still need a little help to fully understand the following task. I look forward to your helpful and detailed answers. In a hydroelectric power plant, 3,000 joules of kinetic energy are converted into electrical energy every second with an efficiency of 90%. The generator produces a voltage of 36 V. Using an…
Physics efficiency?
Today we discussed efficiency in preparation for an experiment. I can't solve a question even if I look in the book or folder. To the question: What energy conversion occurs in a heating coil, for example, in a kettle? Note the types of energy that occur during this energy conversion and provide the equation for…
Planetary gear efficiency only relevant for torque?
Hello I have a planetary gearbox with an efficiency of 0.98, or 98%. According to Chat GPT, efficiency has no influence on speed; that is, input speed/output speed is equal to the gear ratio without efficiency. However, if I have input torque, I have to take the efficiency and the resulting losses into account. Can…
How much energy is lost during the conversion of wood to fungus?
I mean, how much of the wood's energy is lost? If not all of it turns into mushrooms, if some of it is converted into nothing, then that part is not lost either.