Total energy consumption includes all the needed energy for all purposes in state. It is calculated as a sum of total consumption of solid liquid , gas, nuclear and renewable forms of fuels. We present it in thousand tones of oil equivalent (ktoe). The use of energy has increased by 2,2 % per year in Slovenia during 1992 to 2007. You can see the structure of energy use which doesn ’ t benefit to lower CO” emis s ions. Just the opposite emis s ion of CO2 has increased by 21% during 1992 and 2007. The use of gas causes less emis s ions of CO2 than oil or coal. The use of nuclear energy doesn ’ t po l lute air but on the other hand causes waste problems. The use of renewable source of energy doesn ’ t c a use CO2 but at the same time has important en v ironmental influence on ecosystem s and landscape. To reduce influence we should consider about decreasing use of energy at homes, schools and at works.
All states support energy producers to assure security of supply to reduce pollution, including different emissions, and to fulfi l l international obligations (e.g. Kyoto Protocol ). to achieve Economic benefits - subsidies in the form of reduced prices are used to stimulate particular economic sectors In Slovenia the biggest p ercent goes to energy produced by coal. It is not reasonable, because coal is the greater polluter of environment.
This diagram shows us average consumption per hour in still December. During the night consumption remains around 8 Kw per hour. At that time water pump for central heating was working and eight reflectors of 500 W around the school were on . As you can see consumption quickly increased at 8.00 in the morning when all students started with lessons. Due to long darkness lights were on. Consumption was the highest between 9 and 12 o'clock when majority of computers were working. At 2 p.m. almost all lessons were finished and at 4 p.m. adults started with education. After 10 p.m. the school was closed, even cleaners went home.
It is ver y hard to explain the difference in day consumption. We made research and asked representatives of school and technical staff, but there weren’t reasonable answers. We believe the main reason for higher consumption is long night or bad weather which forced us to turned lights on. The second reason is more lessons with computers like Thursdays. But we can’t explain the difference of 148 KWh among the lowest consumption on 3.12 and the highest consumption on 16.12. There were no extra afternoon activities
If we compare average daily consumption it was lower in January. The most likely reason is longer day.
You can see total energy consumption electricity and heating together. We transformed 1 liter of oil in 10 Kwh. January was the most freezing month. Average temperature was minus 1,9 Celsius.
The graph shows consumption of heating energy and electricity per m 2 . The consulting energy agency confirmed our school ran k among those which use is the most efficient.
Energy consumption in slovenia and at etrš 1
Energy consumption in Slovenia
General characteristics• Area: 20,273 km2• Population: 2,039,399 (50% urban and 50% rural)• Density 99 inh. per km2• Forests cover half the territory• 10.000 tones CO2 emission per person• Sources of energy: water, wood and lignit
Energy consumption Renewable energy 10% Nuclear energy 20% Gas 14% Oil 34% Coal 22%
State support for different energy producersReason of subsidiaries are•Security of supply•Environmental improvement•Economic benefitsEnergy subsidiaries were 65,2 mio€ in 200662,7% of them for coal production,coal fired power plants, and forclosures related costs31 % for increasing energyefficiency and for renewableenergy (only 13,3 mio €)
General characteristics• 400 learners on secondary school, 176 at higher vocational education,34 adults and 38 teachers• 4057 m2• 26 classrooms, 2 lecture rooms, 13 cabinets, 3 teacher rooms, library and kitchen• 200 computers• 10 years old• Energy efficiency is 76 KWh per m2 (it ranks us among more energy efficient schools)
Average consumption of electricity per hour in December 28 26 26 25 26 23 21,8 21 15 13,69 13,8 13,7kWh 14 12 12 11,4 1 10,8 10,38 8,5 7,9 8 8 8,1 8,4 8,48 7 0 1.00 3.00 5.00 7.00 9.00 11.00 13.00 15.00 17.00 19.00 21.00 23.00
Average month temperature in Brežice 3 2,5 2,4 2 1,9 1,5 1temperature 0,5 Niz1 0 -0,5 December January February -1 -1,5 -1,8 -2 -2,5
Total consumption of energy in KWh160000 135850140000120000 102209100000 80702 80000 Niz1 60000 40000 20000 0 December January February
Consumption per m2 in kWh 40 35 33,48kWh per squared metres 30 25,19 25 19,89 20 Niz1 15 10 5 0 December January February
Saving tips• To change outdoor reflectors; instead of 500 W we can use 250 W• Checking windows, lights and computers; first grade classes will compete in saving energy and the winner will get atractive reward.• To construct solar cells on the school roof.
Thank you for your attention Klaudija Župevc Elena Mlakar