Koulujen ja päiväkotien laskennallinen ja toteutunut energiankulutus
Tutkimustuotos: Diplomityö tai pro gradu -työ ›
|Kustantaja||Tampere University of Technology|
|Tila||Julkaistu - 8 kesäkuuta 2016|
|OKM-julkaisutyyppi||G2 Pro gradu, diplomityö, ylempi amk-opinnäytetyö|
The real energy consumption was studied by collecting electricity and heating con-sumption data from day care centers and schools in Helsinki and Tampere in the year 2014. The heating consumption is normalized so that consumptions of different cities would be comparable. When the relation between construction year and energy con-sumption is studied the size of the sample varies between 38–43 % of schools and day care centers, which sum up to 558. The sample contains all consumption data that was accessible. The amount of case buildings is 22.
The calculation of the energy consumption for case-buildings is done as Excel calcula-tion and accordingly to The National Building Code of Finland parts D3 (2012) and D5 (2012). The case buildings are located in Helsinki, Tampere and Oulu and those are constructed in the year 2005 or later. The second round of calculations is done with designed amount of ventilated air and local weather zone. Some indicators and their correlation for energy consumption are studied for real and calculated energy con-sumption.
Taking a look into the changes in energy consumption over past decades reveals that the heating and total energy consumption have decreased whereas electricity consump-tion has increased. Day care centers consume more energy per square meter than schools.
When comparing the real and calculated energy consumption it was found that real energy consumption was +68.7 % for heating, +15.4 % for electricity and +41.3 % for total energy compared to the calculated energy consumption. Minimum and values are −30.7 % for heating, −61.1 % for electricity and −19.3 % for total energy. Maximum values are +211.1 % for heating, +54.9 % for electricity +126.5 % for total energy. Changing the amounts of ventilated air to designed amounts and weather zone to local one does not always make the results more accurate. It was also found that out of the studied indicators the best indicator for calculated heating energy consumption is the overall transmission heat transfer coefficient divided by net floor area.