For the calculations in the BSim software, the weather file for Reykjavik has been used as the one for Nuuk did not operate reliably. Hence, the results for the indoor environment are only a guideline of how the building will perform. By having the correct weather file for Nuuk in Be10, excessive heat has been shown to occur [see appendix]. This has therefore been compensated by doing hand calculations for natural ventilation in order to keep the energy consumption for mechanical ventilation down. With outdoor temperatures only reaching a maximum of 10oC in the summer, overheating is assumed to not be problematic with natural single sided stack ventilation in the case of overheating in the Art Hub. 82
A HOLISTIC APPROACH
Moreover, Be10 has bees used in order to assess the overall energy requirements of the building. The aim has been to reach a Zero-Energy during the summer months, as well as fulfill the energy requirements by the Greenlandic standard 2006 Zone 1. Only relying on passive strategies the building will consume 89,4 kWh/m² per year. After implementing geothermal energy with one heat pump, and place an area of 345m² of PV panels on the atrium and the administration building, the building reaches low energy class 2015 in Be10 with 40,2kWh/m² per year. The energy consumption for the building operation is primarily used on electricity and heating. The heat contribution due to people load, mechanical equipment and lighting is utilized 100% from November to March. In the summer months the
utilization goes down to 0,4 which due to less heating requirement and a higher incident solar radiation that 15,76 MWh compared to 0,28 MWh December [See appendix for more] °C
Active strategies such as geothermal energy and solar energy have been implemented into the design. However, as the grid relies on green energy, the building will connect to it to the supply for electric water heating [Nukissiorfiit, 2016].
In the exhibition rooms, mechanical ventilation is used due to the demand of a highly controlled environment. Pipes for mechanical ventilation are vertically distributed between the floors and out to the zones under the suspended ceiling. BSim has been used as a design tool to ensure a good indoor climate by testing different design principles. The calculations have influenced the orientation on the site, the placement of functions and window openings. A more detailed description of the indoor environment corresponding to a classroom and an exhibition space will be provided in the following pages.
Hours/year > 26 °C =0
Max CO2 =739
Mean RH =49,2
Max CO2 =746
Mean RH =31,6
Hours/year > 27 °C =0 Top mean (°C) =19,9 Hours/year > 26 °C =0 Hours/year > 27 °C =0 Top mean (°C) =19,9
Max hours >26 °C =100
Max hours >27 °C
Max CO2 - level = 900 ppm
Rel hum 45-55 % +/-5% per 24 hours
The calculations for indoor climate have been made on one classroom and the exhibition. The requirements are according to category II in the DS474 and DS/EN15251 standards for human comfort. The Indoor climate for the exhibition spaces meets the guidelines set by the International Conservation Services Stensen Varming. Moreover, the building sets out to reach 2015 Low Energy Building Standards.
KW/m²/Year = 40,2
PV’s Contribut. KW/m²/Year = 8,0
Heat pump Contribut. KW/m²/Year = 21,4
Max energy consomption, Energy frame 2015 = 41,4 KW/m²/Year
Fig. 62. Building Requirements
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Architecture and Design Master's Thesis Proposal