General information
The simple definition for power is P = E / t
E = energy
P = power (watts)
T = time
A 1000 watts is 1 kW. If you use a device that consumes 1 kW for one hour, you have used 1 kWh (kilowatthours). That is the unit an electricity company will bill you with.
If we consider 1 kWh costs CHF 0.20, how much does it cost you to run a 2000 W oven for 45 min?
Written by Kolja and Michael
For our post we choosed a regulare dishwasher. 1000 watt is 1 kwh. The kilowatt-hour is a composite unit of energy equal to one kilowatt (kW) of power sustained for one hour
By Silvan and Luana
Team: Sangeetha & Yllza
power consumption: 1500 watts
usage per day: 10min (for example)
This makes 0.1 kWh/day
How many kWh will it use if you use the hair dryer for 24hours?
A laptop has always been used for 3 hours a day. It used 50 Watts = 0.15 kwh per day. The costs for 1kwh is 0.20 Francs
Now because of the corona virus we have to use the laptop for 7 hours a day. How many kilowatt hours per day is that and how much does it cost per day?
You can find the solution on the one note.
Team: Lucas and Sandro
My room is heated with gas. The most common is natural gas, as well as liquid gases. Urban gas or biogas are less common. The whole house has a kind of central heating or boiler. There is a heater in my room. I can choose the heat myself. In summer the heating level is always at 0 and in winter between 3 to 5. In order to prevent an explosion when the flame goes out due to the escape of unburned gas, gas heaters are equipped with a fuse (Zündsicherung). More...
Team: Matteo and Alex
For our calculation we have chosen a microwave oven with 1000 watt power. The picture below shows the energy consumption of a microwave oven that is used for 6 minutes per day.
This is the formula to calculate the value: E(kWh/day) = P(W) × t(h/day) / 1000(W/kW)
calculator
Which energy do we use at home?
At home we use pellets to heat our rooms.
What are pellets?
Pellets are small wooden pieces. Raw materials get crushed and pressed in the same size. They always get produced dry.
Advantages
Wood has advantages over fossil fuels: it is climate neutral and for a long time it was cheaper than heating oil. Above all, wood grows back and is not finite, in contrast to the oil reserves. Wood pellets can be used to heat in environmentally friendly way.
The refrigerator is used for our Energy consumption calculator example. 1000 watt is one kilowatt.
Kilowatt is a unit for energy and work. We took the refrigerator because it is used daily and is switched on during day and night.
Energy calculator
This post is made by Diego and Luca.
Our house is heated with oil. We have a big oil tank as you can see on the picture. Many households are using oil as energy to heat the house or appartement. This isn’t the best way as it is a nonrenewable energy but the number of heating oil energy is decreasing.
We have a floor heating system at our apartment.
The floor heating is a surface heating system that consists of pipes in the floor. If warm heating water flows through the system, it releases thermal energy and first heats up the screed in the underfloor heating system. The heat then flows upwards into the room.