Saving energy in the kitchen
When cooking and baking, you can save up to 60 % energy …
Use appropriate dishes.
It is very important to use the right cooking utensils. These should be pots and pans that conduct heat well (e.g. stainless steel with compensation bottom, multilayer bottom that keeps heat when the cooker is switched off, copper, aluminium or enamelled steel. Pots and pans should have a diameter that matches the hob of the stove (not less), as this can result in a loss of up to 20 % of energy produced.
Use flat-bottomed pots, preferably 3-5 mm thick, the lid of the pot should be well-fitting. Remember that the bottom of the cooker is always clean, contamination can increase electricity (or gas) consumption by up to 50%.
When you are planning to buy an electric induction hob, it is worth considering buying a modern hob. The cooking area of such a hob adapts itself to the shape of the pots and pans.
The energy needed to boil 1.5 litres of water …
When you heat 1.5 litres of water to 80 degrees C on a ceramic stove (without induction), only 55 % of the energy is used to heat it.
The remaining energy (45 %) is composed:
loss of heat in the cooking area 27% heating up the cooking zone 8% heating and heat loss of the cooker 10%
Time, costs and energy consumption of the three most popular ways of boiling 1.5 litres of water
time (minutes) : 10,5
costs (cents) : 10.4
energy needed (kWh): 0,26
time (minutes) : 10,0
costs (cents) : 4.3
energy needed (kWh): 0,33
time (minutes) : 5,0
costs (cents) : 6,8
energy needed (kWh): 0,17
Remember – cook under the lid
Cover the cooker lid when cooking, whenever possible, and do not lift it more often than necessary. You should also use glass lids, so that you can look inside the cooker and do not lose heat unnecessarily by lifting the lid. At the end of cooking, lower the temperature of the cooktop, reduce the flame of the burner – you will save, not lose heat, the food will not lose its value either.
If you are preparing dishes that need to stew for a long time, it is a good idea to prepare them in the pressure cooker. This way you will save more vitamins, reduce stewing time and save 30-60% of energy.
Baking of food
When you bake food in the oven, 78% of the energy is the loss of heat to the environment. Preheating the oven alone consumes 15% of the energy, while baking alone consumes only 7%.
The oven, when preheated, works longer and its energy consumption is 20 % higher than when a dish is placed in a cold oven.
So heat up the oven only when it’s really necessary (if you’re preparing foods that need it, foods with a short baking time). Otherwise, do not preheat the oven, this saves 20 % of energy.
It’s worth choosing an oven with thermo-circulation. You can then set the temperature 25-30 degrees C lower than with bottom-up or top-down heating (with the same baking time).
Remember to use the space in the oven rationally. If your oven has a thermo circulation function, up to four levels can be used at the same time. If you are preparing a large number of dishes, you can, for example, place two or three cakes in the oven.
Avoid opening the oven door frequently. This increases energy consumption by 10%. You can also switch off the oven about 10 minutes before the end of baking to use the remaining heat and save energy.
Use an electric kettle
Water for tea should be cooked in an electric kettle instead of an electric kitchen, and toasts will be cheaper if we use a toaster and not an oven to bake them.
If you want to save water by boiling in an electric kettle, stick to the basic rule: pour into it only the amount of water you actually use. If you only want to prepare two glasses of tea, don’t fill the kettle fully, just pour as much water as you need.
When buying a new electric kettle, always choose one with a hob and not a spiral heater. The reason is simple: the heater should always be completely covered with water when cooking, so each time you pour 0.5 l. of water into the kettle, using the kettle with the hob you can cook smaller amounts of water (even one glass).
Here, the savings depend on the type of food we prepare and the amount of food we prepare. If you want to save money, the food should not exceed 400 grams.
Preparing food in a microwave oven saves energy when it’s small, ready meals or when we heat up the dishes. The appliance should also have enough power: preferably four degrees of efficiency and at least 600W.
If you heat a dish in a microwave, you will do so within 3-4 minutes. If you use traditional cooking methods, you first need to heat up the burner or oven and then the heat is transferred to the food. In a microwave oven, heat is generated in the food itself. Make sure that the food is placed as flat as possible on the plate (so that the surface exposed to the waves is as large as possible). This will shorten the heating time and consume less energy.
If you cook vegetables in a microwave, it is enough to add 1-2 tablespoons of water to them (so much water is enough because the heat is generated directly in the food).