Energija

Ste se kdaj vprašali, kaj dejansko poganja svet okoli nas?

Razmislimo, kako pomembna je električna energija za življenje dandanes?

Električna energija je abstraktna fizikalna količina, ki je osnovni temelj življenjskega sloga naše civilizacije.

Skrivnostna in raznolika se pojavlja v različnih oblikah – od toplote do gibanja, svetlobe do elektrike. A najbolj presenetljivo je, da je energija shranjena celo v vsakodnevnih stvareh, kot so hrana, les ali celo premog.

PORABA ENERGIJE:

Energijo porabljamo, ko jemo, si osvetlimo sobo, gledamo televizijo, se pogovarjamo po mobilnem telefonu, uporabljamo računalnik, se peljemo v službo (z avtom, avtobusom, včasih z vlakom), nakupujemo, potujemo, pri prevažanju blaga in živil, osvetljevanju ulic in mest, pri ogrevanju stavb. Proizvajajo jo tudi tovarne, ki proizvajajo izdelke, javni sektorji, ki nam nudijo zdravstvene, izobraževalne, športne, kulturne in druge storitve.

Grafikon: Domača proizvodnja energije po energetskih virih, Slovenija

Skupna proizvodnja energije v Sloveniji se povečuje.

Velik del energije se porabi v gospodinjstvu. Sem štejemo prevoz živil z enega dela sveta na drugega z ladjami, vlaki, tovornjaki in letali, saj imajo ljudje željo po neznačilnih živilih. Pri tem pa ne pomislijo, da se porabi zaradi samega transporta veliko energije.  V zadnjih letih je bilo po cestah prepeljanega 5-krat več blaga kot po železnicah. Zavedati se moramo, da javni potniški prevoz upada, število osebnih avtomobilov narašča in s tem se povečuje poraba energije.

Ali morda veš koliko energije porabi redni voznik avtomobila ?

Povprečen slovenski avto porabi približno 7 litrov goriva na prevoženih 100 kilometrov in z njim dnevno prevozimo povprečno 35 km. To pomeni porabo energije v višini 24 kWh na dan.

Za primerjavo:

  • povprečen človek na dan poje približno 2600 kalorij = 3 kWh,
  • za ogrevanje in hlajenje doma na dan porabimo okoli 37 kWh,
  • za prižgano elektroniko, kot sta televizor in računalnik porabimo približno 5 kWh,
  • za osvetljavo(v gospodinjstvu, javna razsvetljava, luči v prometu …) pa povprečno porabimo 4 kWh,
  • povprečna dnevna proizvodnja energije v Sloveniji 100 000 000 kWh.

Vedeti moramo, da se energija porablja pri pakiranju živil, pri proizvodnji embalaže za živila in pri pakiranju za transport. To vključuje energijo, porabljeno za izdelavo embalaže, tiskanje etiket ter polnjenje in zapiranje embalaže. Pri nekaterih surovinah je pomembno, da so med prevozom primerno hlajena kot so sveže sadje, mleko in mlečni izdelki… In še na koncu transportne poti se porabi energija pri postopkih v skladiščenju izdelkov oz. živil potrebna je za delovanje skladiščnih in distribucijskih centrov, v ključno s sistemom za nadzor temperature, osvetlitvijo in manipulacije s tovorom.

PORABA ENERGIJE V GOSPODINJSTVIH

V slovenskih gospodinjstvih porabimo več kot 80 % energije za:

  • ogrevanje (62 %) in
  • pripravo tople vode (19,5 %).

Preostalih slabih 20 % energije porabimo za:

  • delovanje malih električnih naprav,
  • delovanje velikih gospodinjskih aparatov,
  • kuhanje in
  • razsvetljavo.

RAZMISLI Z NAMA:

Ali ste kdaj pomislili, kako vaše dnevne odločitve vplivajo na okolje in prihodnje generacije? No, vsekakor je vredno razmisliti. Vsakič ko namesto uvožene hrane izberemo lokalno pridelano hrano, s tem skrajšamo transportno pot in zmanjšamo porabo energije.

Kaj še lahko storimo?

Vožnjo z avtomobilom nadomestimo z vožnjo s kolesom ali javnim prevozom in tako zmanjšajmo izpuste toplogrednih plinov; polnilec za telefon izklopimo, ko telefona ne polnimo; prav tako ugašamo računalnike, ko jih ne uporabljamo; pravilno uporabljamo električne naprave in jih redno vzdržujemo… S temi preprostimi koraki lahko vsi postanemo okoljski junaki in prispevamo k boljšemu jutrišnjemu svetu!

»Ko se zavedamo pomena trajnostne potrošnje in skupaj delamo na zmanjšanju porabe energije, ne le gradimo boljši jutri za nas, temveč tudi ustvarjamo navdihujočo pot za prihodnje generacije.«

 VIRI:

https://www.esvet.si/drugi-viri-energije

https://www.stat.si/StatWeb/File/DocSysFile/3773/Okolje_energetika_transport.pdf

https://www.stat.si/StatWeb/News/Index/11381

Knjiga: Energija in mi: pogovori s strokovnjaki

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ENGLISH:

ENERGY

Have you ever wondered what drives the world around us?

Let’s see how important electricity is for our everyday lives.

Electricity is an abstract physical quantity that is the foundation of the lifestyle of our civilization.

Mysterious and diverse, it occurs in various forms – from heat to motion, and light to electricity. But the most fascinating thing is that energy is stored even in everyday things such as food, wood, or even coal.

ENERGY CONSUMPTION

We use energy in many ways, such as transportation, lighting, heating, and food production. We also consume a lot of energy when we use electronics, such as our phones, computers, and TVs. In addition to that, energy is produced by the factories that manufacture goods, and the public sectors that provide us with health, education, sports, as well as cultural and other services.

Diagram: Domestic energy production by energy sources, Slovenia

The total production of energy in Slovenia is increasing.

A major part of energy is used in our households. This includes the transport of food from one part of the world to the other with ships, trains, trucks and airplanes because people have a desire for imported foods. They don’t even think about how much energy is used in transport. The proportion of goods transported by road was five times greater than that transported by rail over the last few years. We must be aware that public transport is decreasing, the number of vehicles per person is increasing and therefore, the use of energy is rising.

Do you know how much energy a regular car driver consumes😉?

An average Slovene car consumes approximately 7 liters of fuel per 100 kilometres traveled, and we usually drive an average of 35km a day. That is equal to the energy consumption of 24 kWh per day.

For comparison:

  • On average, a person consumes approximately 2,600 calories per day, equivalent to 3 kWh,
  • For heating and cooling our homes we spend about 37 kWh,
  • For electronic devices, such as TVs and computers, we use about 5 kWh,
  • For lights (in households, public lighting, traffic lights, etc.) we utilise roughly 4 kWh,
  • Annual electricity production in Slovenia amounts to 15,600 GWh.

We also need to know that energy is used in food packaging—in its production and inboxing for transport. This includes the energy used to produce the packaging, print the labels, and fill and seal the packets. Some raw materials, such as fresh fruit, milk, and dairy products, must be properly refrigerated during transport. At the end of the transport destination, energy stores products and preserves food; it is needed for the operation of storage and distribution centres, including temperature control, lighting, and cargo handling systems.

ENERGY CONSUMPTION IN HOUSEHOLDS

In Slovenian households, we use more than 80% of our energy for:

  • heating (62%) and
  • warming up water (19,5%).

The remaining 20% of energy is used for:

  • the operation of smaller electrical appliances,
  • the operation of larger household appliances,
  • cooking and
  • lighting.

OUR CONCLUSIONS:

Have you ever wondered how your daily choices affect our environment and our future generations? It is definitely worth considering. Every time we choose local over imported food, we shorten the transportation path and reduce the consumption of energy.

What else can we do?

We can reduce greenhouse gas emissions by replacing driving with biking or using public transportation. With these simple steps we can all become environmental heroes and contribute to a better world of tomorrow!

When we recognize the importance of sustainable consumption and work together to reduce energy usage, we not only build a better tomorrow for ourselves but also create an inspiring lane for future generations.