Shading calculation methods and regulation simplifications – The Portuguese case

Shading calculation methods and regulation simplifications – The Portuguese case

Oliveira, Marta Fernandes (University of Minho)
Mendonça, Paulo (University of Minho)
Tenpierik, M.J. (TU Delft Environmental & Climate Design)
Santiago, Pedro (Universidade Fernando Pessoa)
Silva, José F. (Polytechnic Institute of Viana do Castelo)
Silva, Lígia Torres (University of Minho)

2023

How to analyse the omissions of thermal regulations and evaluate methodologies that provide building execution or thermal certificates that do not correspond to reality and usually incur costs? We can start by analysing different simulation methods and shading calculations that provide solar gains and shadow optimisation. After evaluating how the regulations define the calculation assumptions and how this calculation is performed, the discrepancies (simplifications) that the regulations allow or ignore are presented, and it is exemplified using two case studies. Using the Portuguese regulation as a case study, it leads to incorrect conclusions or assumptions due to unequal access to solar radiation or the shading factor calculation that experiences the omission of angles or time periods. Therefore, the aim is to propose a calculation process (premises) that minimises the discrepancies between simulation (optimisation strategy) and reality (applicability of strategies) for sustainable output.

solar shading
political-legislative premises
shading calculation methods
solar benefits
sustainable city
ineffective enforcement of regulations
process innovation

http://resolver.tudelft.nl/uuid:015b1223-18dd-4bee-8ee7-bee25baf18d9

https://doi.org/10.3390/buildings13061521

2075-5309

Buildings, 13 (6)

Institutional Repository

review

© 2023 Marta Fernandes Oliveira, Paulo Mendonça, M.J. Tenpierik, Pedro Santiago, José F. Silva, Lígia Torres Silva