The Trellick Tower as other constructions of the 70´s has some deficits in its environmental performance. The principal target of this work was to analyze it from an energy consumption point of view and develop ideas to improve its performance through changes in the architecture and construction. Two flats where monitored: one duplex on the 24th (flat 170) floor and one single storey on the 21st (flat 167). Both of them are corner flats in order to establish comparisons between them.
The main tools used to achieve this target are Ecotect, Radiance and Tas, as well as the Energy Index file and the Simple calculation sheet.
As an experiment to know which might be the thermal experience these people might have each day, we did a little trip with the data logger from the external part of the building until one of the flats and vice versa.
The daylight measurements were taken the 22nd of October between 16:40 and 17:30.
Maximum illuminance inside 500 lux. The terrace overhang and the living room sliding door works as a ﬁlter for daylight in the living room area. There are glare problems in the studio because the window to floor ratio and the proportion of the space.
Summer: The sun patch doesn’t enter the space in the living room because the overhang, meanwhile in the studio that has no overhang the sun patch enter in to the space.
Winter: Due to the low position of the sun the sun patch stretch into the hallway, meanwhile in the studio cover the whole area.
The DB temp. and RH measurements were taken the 22 of October between 16:40 and 17:30. The temp of the flat was affected by electric heaters with an average temperatures of 22ºC within the comfort zone. A contrast of 4K in temperature was register at the corridor and the terrace. In the stairway a slightly stack effect was record and shown in the section.
The temperature of the studio is high and more uniform, whilst the line of the living room is sharper. It is a symptom of a lightweight performance of the space, and also shows that the glazed area of the room is generating big changes in the DBT. From the information obtained in the interview it can be predictable that during the months of summer the studio will suffer from overheating. This is caused by the direct exposition to the sunlight in a facade facing south. The living room will have milder temperatures because it is protected by the depth of the terrace.
How do you value the temperature of each room throughout the day?
The changes in the envelope will modified the percentage in the window to floor ratio and would eliminate the obstruction angle of the overhang affecting the living room. The installation of a folding window will allow the owner multiples variables and flexibility within the terrace space.
1. The Base Case of the Flat in the actual condition
2. Changes in the envelope without improving the U values.
3. U values improvement in addition to the changes to the envelope.
The test runs mention above was simulated for the dates Jan 1-7 (winter condition)
At first instance when the simulation with the envelope was done without insulation, the changes in tempera-ture were noticed at the terrace space improving the tempera-ture by 6ºC from 9ºC-15ºC. Adding the insulation to the simu-lation and coupling the terrace temperature with the living room, the living room raise to the comfort zone at evening hours.