For our homework we had the task to calculate energy from kJ to kWh.

Since a few years I am very interested in sports but also nutrition. For me it is very important to keep myself fit and nourish my body with the food that it needs.

Therefore, I’ve decided to calculate the energy which I burn during my workout and the food that I eat afterwards.

On Monday evening I went to my CrossFit lesson which’s load time was 30 minutes - total endurance 1 hour. My Garmin watch counted a total consumption of 320 calories during the workout.

Afterwards, I ate broccoli, spatzli and smoked tofu for dinner. The dish had a total calories of 380.

To calculate the calories of my food I use the app myfitnesspal and to convert the calories to KJ and kWh I’ve used this website.

I burned:

320 kilo calories (kcal) - which is 1339.776 kilojoules (kJ) - which is 0.37216 kilowatthours (kWh)

I ate:

380 kilo calories kcal - which is 1590.984 kilojoules (kJ) - which is 0.44194 kilowatthours (kWh)

I’ve decided to make the comparison of food burned and food eaten because I think it’s very interesting to see, how much energy we need during a workout in relation to the food that we eat.

If you want to learn more about energy and food I suggest you this interesting article

How many energy produce my dish?

I want to know how much energy is in a normal daily meal of mine. So I calculated all the kilocalories of my dish, which I ate yestaerday. I ate approximately 300 gramm of spaghetti with sauce bolognese. But how much energy give this dish to me? This is what i wanted to know. Therefore I count the gramm of spaghetti I ate and the amount of gramm of the sauce. How I calculated the kilowatthours you can find later in the text.

Calculation

In totale I consumed 1241 (kcal). I calculated this data in joule 5192344. After that step I calculated it into kilowatthours (1.44778). I used this website to do the task. (Umrechnung.org, 17.09.19).

Matthias Baenziger, TZ19

I can't cook very well so I buy my meals for lunch in the supermarket. On Monday I ate 6 pcs Avocado maki. One avocado maki has 28 calories. 6 pcs has 168 calories in this case. We had to convert calories into kwh and kj. I used an online calculator.

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Claudia Betschart, BM2 TZ 19

We had to have a closer look at a daily meal. We were given the task to calculate the energy of the prepared food and to show it in the following three units of measurement: kilokalories (kcal), kilojoules (kJ) and kilowatthours (kWh).

On Monday I prepared "Tortillas" for lunch. The kids love this dish, because they can choose from various ingredients.

Calculation for one single Tortilla filled with chicken, salad, corn, cheese and sour cream:

290 Kalories (kcal)  --> 1214.172 kilojoules (kJ) --> 0.33727 kilowatthours (kWh)

To calculate these three units I used an online calculator. Klick here to find out.

Are you interested to learn more about above mentioned units? Check out following links:

Calories (Wikipedia) / Joules (Wikipedia) / Kilowatt (Wikipedia)

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Jeannine Herren, BM2 TZ19

We had the task to calculate the energy of a meal our choice, from kcal to kJ and kWh. Sunday is "brunch-day"! So i've chosen some delicious American-Style Pancakes: More...

Our exercise was to convert the amount of kcal of a daily meal into kJ and kWh.

I decided to calculate the amount of kJ and kWh of a portion "Rice Casimir". Here you can find the recipe,
I used: recipe "Rice Casimir"

Here you can find my calculation:

amount of kcal = 723
0.00116 kWh = 1 kcal  ->  723 * 0.00116= 0.83868 kWh
4.19 kJ = 1 kcal   ->  723 * 4.19 = 3'029.37 kJ

For the calculation I used the following data:

Energieeinheiten

Wärmemenge

Einheit der Wärmemenge = Joule (J = N m), vormals Kalorien (kcal)

1 Joule (J) = 1 Wattsekunde (Ws)
3,6 kJ = 3.600 Joule (J) = 1 Wattstunde (Wh)
3,6 MJ = 3.600.000 Joule (J) = 1 Kilowattstunde (kWh)

Umrechnungstabelle:
1 kWh = 860 kcal = 3.600 kJ (=3,6 MJ)
0,00116 kWh = 1 kcal = 4,19 kJ
0,278 kWh = 239 kcal = 1 MJ

Leistung

Definition: Energie pro Zeiteinheit
Einheiten der Leistung: Watt (W = J/s)

Wärmeeinheiten (WE) = kcal/h

Umrechnungstabelle:
1 kW = 860 kcal/h = 860 WE
1,16 kW = 1 Mcal/h = 1.000 WE

You can find this data on the following website: Energy units

Tamara Keller, BM2 Teilzeit 2019

Hello everybody!

We wanted to inform you, that there will be an energy day in zürich.
The ETH organises an energy day. The energy day takes place on tuesday, 10. december 2019 from 9 o' clock in the morning until 18 o' clock in the evening.

There will be interesting activities like diffrent presentations or discussions.

If you are intersted please take a look on their website.

Here you can find the link to their website: ETH energy day 2019

Jeannine, Matthias, and Tamara, BM2 Teilzeit 2019

Electricity production by wind is becoming more and more popular. In the future, wind power should become an important pillar of renewable electricity production, but how does wind energy work?

The wind sets the individual rotor blades on the wind turbines in a rotary motion. This drives a generator that produces electricity. Physically speaking, the kinetic energy of the air flow is converted into electrical energy.

This was one question, we reaserched and answered with our presentation about wind energy. Our exercise was to give our classmates some more information about wind energy.

If you are intersted to get further information about wind energy please take a look at our presentation.

Here you can find our presentation:

Renewable Energy Carriers_Wind_Energy.pdf (1,92 mb)

Jeannine, Matthias and Tamara, BM2 Teilzeit 2019

Plastic use has increased by twenty percent since the 1950s and so has the amount of its waste generated. Estimates show that less than 5% of the plastic manufactured each year is recycled, although, production of plastic is still increasing. Instead of burning the material and therefore creating additional air pollution there was a new way found to turn plastic waste into green energy. More...

After watching the video (Humans - Destroyers of the earth) I have some insights that we had to do for our homework. I wanted to add the category "energy carriers" too but it doesn't exist yet.More...

More...