Page 30 - ZEB AnnualReport 2015

ØVRE ROTVOLL: A NET ZERO ENERGY NEIGHBOURHOOD IN TRONDHEIM

ØVRE ROTVOLL: ET NULL-ENERGI BOLIGOMRÅDE I TRONDHEIM

Gabrielle Lobaccaro (NTNU)

The integration of solar systems on a In this framework, the area of Øvre Rotvoll, between the height (h) of the buildings and
building or district scale, producing energy connecting downtown Trondheim with the width (w) of the street, and the use of inishing
covering the demand of the buildings, is residential neighbourhoods of Charlottenlund materials on the façades and on the ground
becoming a priority in the urban planning and Ranheim, has the ambition to become could consistently affect the solar accessibility
process. However, despite solar radiation a development area designed according of the buildings.
being suficient, especially in southern and to the targets of the Net-Zero Energy
central parts of Norway (annual horizontal Neighbourhood. This case study is framed Based on the outcomes of a parametric study,
insolation around 900 kWh/m in Grimstad), within the Subtask C “Case studies and action in which different aspect ratios (h/w=0.5, 1, 1.5
2
the electricity production from solar energy is research” of Task 51 “Solar Energy in Urban and 2), colours, and inishing materials for the
still not signiicant. The dificulties are mostly Planning” initiated by IEA’s Solar Heating and ground and façades, the entire masterplan for
related to unpredictability and unreliability. Cooling Programme. The scope of the case the Øvre Rotvoll district has been developed.
Therefore, new approaches for better study was twofold: on the one hand, the aim The analyses conducted allowed minimizing
integration of solar systems into the building was to develop a solar potential analysis of as much as possible the overshadowing
envelope and preliminary evaluation of the the district in order to maximize both passive effect created by the nearby buildings. A
energy use should increasingly be taken into and active design strategies, and, on the other combination between parametric modelling
consideration in the early design phases hand, to achieve the energy target of the Net tools and solar dynamic simulation software
during urban planning processes. Zero Energy Neighbourhood. has been used to optimize the building shapes
in one part of the district (Figure 1). The
The continuous development of the city of In the solar potential analysis, solar analyses demonstrated that the optimized
Trondheim due to the increase in population dynamic simulations, using a RADIANCE coniguration of the buildings’ volumes could
has generated a further need for residential based software, DIVA for Rhino, has been increase their solar accessibility approximately
buildings. The Norwegian Statistics Centre conducted. The results demonstrated how the from 35% to 50% (Table 1).
(SSB) has estimated that from 2000 to 2030, optimization of the buildings’ orientation, their
there will be an increase of 70 000 inhabitants. relative distances regulated by the aspect ratio

30 ZEB annual report 2015