Publicação
Integração do método SLR na norma ISO 13790: o caso das estufas
| Resumo: | The building sector is responsible for about one third of the European final energy consumption. Over the last few years its energy performance has been promoted, mainly through the 2010/31/EU directive. According to this directive, the energy performance of buildings determination should include passive systems and be based on current European standards, as ISO 13790, which supports the heating and cooling energy needs calculations. In this work, a method to account for the solar gains of sunspaces, in the heating energy needs (HEN) calculations is analyzed. Despite the methodology presented for these systems in the referred standard, there are simpler methods, such as SLR method, which is based on empirical correlations. Therefore SLR correlations are determined for sunspaces for the Portuguese climate. A proposal to integrate the SLR method in the standard, to easily account the gains of sunspaces combined with direct gain systems, is also analyzed. To achieve this goal, the SLR method, initially defined for a monthly time basis, is generalized for an annual time basis. A simplified methodology for determining the terms used in the method is proposed, based on the methodology presented in the standard. Overall 120 cases of sunspaces with different geometric and constructive characteristics were analyzed. The monthly determination of HEN, through the SLR correlations determined in this work, presents high errors. However, its annual determination, through the monthly method, is viable, with errors below 30 % for most cases. The generalization of the SLR method for an annual time basis is also viable. The annual HEN determined through the integration of SLR method in the standard is only viable for sunspaces with lower projected area. |
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| Autores principais: | Sabino, Catarina Miguel Correia |
| Assunto: | Estufas Método SLR ISO 13790 Teses de mestrado - 2012 |
| Ano: | 2012 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | português |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | The building sector is responsible for about one third of the European final energy consumption. Over the last few years its energy performance has been promoted, mainly through the 2010/31/EU directive. According to this directive, the energy performance of buildings determination should include passive systems and be based on current European standards, as ISO 13790, which supports the heating and cooling energy needs calculations. In this work, a method to account for the solar gains of sunspaces, in the heating energy needs (HEN) calculations is analyzed. Despite the methodology presented for these systems in the referred standard, there are simpler methods, such as SLR method, which is based on empirical correlations. Therefore SLR correlations are determined for sunspaces for the Portuguese climate. A proposal to integrate the SLR method in the standard, to easily account the gains of sunspaces combined with direct gain systems, is also analyzed. To achieve this goal, the SLR method, initially defined for a monthly time basis, is generalized for an annual time basis. A simplified methodology for determining the terms used in the method is proposed, based on the methodology presented in the standard. Overall 120 cases of sunspaces with different geometric and constructive characteristics were analyzed. The monthly determination of HEN, through the SLR correlations determined in this work, presents high errors. However, its annual determination, through the monthly method, is viable, with errors below 30 % for most cases. The generalization of the SLR method for an annual time basis is also viable. The annual HEN determined through the integration of SLR method in the standard is only viable for sunspaces with lower projected area. |
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