Simulation
In this study, optimisation of both parameters together with energy performance assessment of the mechanical ventilated PV façade system are conducted using TRNSYS. The schematic diagram of the components used to simulate the system is provided in Figure 2. The façade is part of a prototypical daylit cellular office building that is represented by Type 56 in Figure 2. This built form is chosen because it accounts for more than 67% of office buildings in England and Wales [25]. The building is built based on the UK building regulation standard 2010 [26] and has two floors with a total floor area of 240 m2. In addition, this building benefits from having 72m2 south facing façade. The prototype building is fully described as the sixth …show more content…
Results and discussions
The results of optimisation for the first scenario reveals that the mechanical ventilated double skin façade operates at its optimum situation when the air cavity has its minimum possible dimension 0.05m with the ventilation rate equal 40 l/s. The successive optimisation process is provided in Figure 3. In the same way the outcome of optimisation of cavity depth and airflow rate for the rest of scenarios are illustrated in Table 3.
Table 3 Optimisation results for each scenario.
Optimisation Scenarios parameters No.1 No.2 No.3 No.4 No.5 No.6
Depth of the airflow cavity
(m) 0.05 0.05 0.05 0.05 0.05 0.05
Airflow rate
(l/s) 40 29 6.5 21 15.5 4.5
Figure 3 Optimisation results for the first …show more content…
However, due to the same reason, the heat gained by the airflow passing through the cavity can less contribute to the reduction of heating demand in buildings. For the dimension of the air cavity, optimisation results show that the minimum practical depth for the cavity is an ideal option regardless of the site location. In addition, according to Table 3, the electrical efficiency of the fan significantly influenced the optimum design solution for airflow rate passing through the air cavity of the double skin PV facade. Finally, following a conservative SFP value equal to 1.3 (W/l/s), optimum airflow rate for Reading and Izmir sites are respectively 29 and 15.5
In this study, optimisation of both parameters together with energy performance assessment of the mechanical ventilated PV façade system are conducted using TRNSYS. The schematic diagram of the components used to simulate the system is provided in Figure 2. The façade is part of a prototypical daylit cellular office building that is represented by Type 56 in Figure 2. This built form is chosen because it accounts for more than 67% of office buildings in England and Wales [25]. The building is built based on the UK building regulation standard 2010 [26] and has two floors with a total floor area of 240 m2. In addition, this building benefits from having 72m2 south facing façade. The prototype building is fully described as the sixth …show more content…
Results and discussions
The results of optimisation for the first scenario reveals that the mechanical ventilated double skin façade operates at its optimum situation when the air cavity has its minimum possible dimension 0.05m with the ventilation rate equal 40 l/s. The successive optimisation process is provided in Figure 3. In the same way the outcome of optimisation of cavity depth and airflow rate for the rest of scenarios are illustrated in Table 3.
Table 3 Optimisation results for each scenario.
Optimisation Scenarios parameters No.1 No.2 No.3 No.4 No.5 No.6
Depth of the airflow cavity
(m) 0.05 0.05 0.05 0.05 0.05 0.05
Airflow rate
(l/s) 40 29 6.5 21 15.5 4.5
Figure 3 Optimisation results for the first …show more content…
However, due to the same reason, the heat gained by the airflow passing through the cavity can less contribute to the reduction of heating demand in buildings. For the dimension of the air cavity, optimisation results show that the minimum practical depth for the cavity is an ideal option regardless of the site location. In addition, according to Table 3, the electrical efficiency of the fan significantly influenced the optimum design solution for airflow rate passing through the air cavity of the double skin PV facade. Finally, following a conservative SFP value equal to 1.3 (W/l/s), optimum airflow rate for Reading and Izmir sites are respectively 29 and 15.5