Potential and Benefit of Green Roof Energy Renovation of Existing Residential Buildings with a Flat Roof in Belgrade
Green roofs are considered to be one of the optimal tools for saving energy and protecting the environment in developed countries. In this paper, an analysis of the possible application of green roofs on existing residential buildings with flat roofs is presented. In the economic analysis, models of...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-06-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/13/13/7348 |
| _version_ | 1797592186101956608 |
|---|---|
| author | Zoran Perovic Stanko Coric Snezana Isakovic Dragoslav Sumarac |
| author_facet | Zoran Perovic Stanko Coric Snezana Isakovic Dragoslav Sumarac |
| author_sort | Zoran Perovic |
| collection | DOAJ |
| description | Green roofs are considered to be one of the optimal tools for saving energy and protecting the environment in developed countries. In this paper, an analysis of the possible application of green roofs on existing residential buildings with flat roofs is presented. In the economic analysis, models of existing buildings in Belgrade, with two different types of green roofs, are studied. A key indicator of investment profitability in this investigation is the net present value (NPV) of the green roof project. Besides the private economic impact, other aspects of green roof applications, significant for sustainable development, have been highlighted. The values of the reductions in the annual energy needed for heating and cooling are compared for different scenarios. A maximum energy saving of 22% in the heating season is determined in the building energy simulation program for the model with an intensive green roof. Life cycle profit analysis was based on the probabilistic approach. The corresponding variance-based sensitivity analysis determined the impact of various parameters on the final result. In all models, the first order sensitivity index, which measures the impact of the number of residential units on the NPV, ranges from 12.2% to 63.6%. Sensitivity analysis showed that the benefit of property value increase has the highest influence on the calculated NPV in scenarios that account for this benefit. The obtained results in those scenarios indicate that the most probable NPV at the end of the life cycle is EUR 43/m<sup>2</sup> and EUR 82/m<sup>2</sup> for extensive and intensive green roofs, respectively. |
| first_indexed | 2024-03-11T01:47:52Z |
| format | Article |
| id | doaj.art-36cf10dbb17949278d0cbfbf914a3a98 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T01:47:52Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-36cf10dbb17949278d0cbfbf914a3a982023-11-18T16:05:06ZengMDPI AGApplied Sciences2076-34172023-06-011313734810.3390/app13137348Potential and Benefit of Green Roof Energy Renovation of Existing Residential Buildings with a Flat Roof in BelgradeZoran Perovic0Stanko Coric1Snezana Isakovic2Dragoslav Sumarac3Faculty of Civil Engineering, University of Belgrade, 11000 Belgrade, SerbiaFaculty of Civil Engineering, University of Belgrade, 11000 Belgrade, SerbiaDepartment of Community Affairs, City Administration–Urban Municipality of Stari Grad, 11000 Belgrade, SerbiaDepartment of Technical Sciences, Civil Engineering, State University of Novi Pazar, 36300 Novi Pazar, SerbiaGreen roofs are considered to be one of the optimal tools for saving energy and protecting the environment in developed countries. In this paper, an analysis of the possible application of green roofs on existing residential buildings with flat roofs is presented. In the economic analysis, models of existing buildings in Belgrade, with two different types of green roofs, are studied. A key indicator of investment profitability in this investigation is the net present value (NPV) of the green roof project. Besides the private economic impact, other aspects of green roof applications, significant for sustainable development, have been highlighted. The values of the reductions in the annual energy needed for heating and cooling are compared for different scenarios. A maximum energy saving of 22% in the heating season is determined in the building energy simulation program for the model with an intensive green roof. Life cycle profit analysis was based on the probabilistic approach. The corresponding variance-based sensitivity analysis determined the impact of various parameters on the final result. In all models, the first order sensitivity index, which measures the impact of the number of residential units on the NPV, ranges from 12.2% to 63.6%. Sensitivity analysis showed that the benefit of property value increase has the highest influence on the calculated NPV in scenarios that account for this benefit. The obtained results in those scenarios indicate that the most probable NPV at the end of the life cycle is EUR 43/m<sup>2</sup> and EUR 82/m<sup>2</sup> for extensive and intensive green roofs, respectively.https://www.mdpi.com/2076-3417/13/13/7348green rooflife cycle costenergy renovationsensitivity analysis |
| spellingShingle | Zoran Perovic Stanko Coric Snezana Isakovic Dragoslav Sumarac Potential and Benefit of Green Roof Energy Renovation of Existing Residential Buildings with a Flat Roof in Belgrade Applied Sciences green roof life cycle cost energy renovation sensitivity analysis |
| title | Potential and Benefit of Green Roof Energy Renovation of Existing Residential Buildings with a Flat Roof in Belgrade |
| title_full | Potential and Benefit of Green Roof Energy Renovation of Existing Residential Buildings with a Flat Roof in Belgrade |
| title_fullStr | Potential and Benefit of Green Roof Energy Renovation of Existing Residential Buildings with a Flat Roof in Belgrade |
| title_full_unstemmed | Potential and Benefit of Green Roof Energy Renovation of Existing Residential Buildings with a Flat Roof in Belgrade |
| title_short | Potential and Benefit of Green Roof Energy Renovation of Existing Residential Buildings with a Flat Roof in Belgrade |
| title_sort | potential and benefit of green roof energy renovation of existing residential buildings with a flat roof in belgrade |
| topic | green roof life cycle cost energy renovation sensitivity analysis |
| url | https://www.mdpi.com/2076-3417/13/13/7348 |
| work_keys_str_mv | AT zoranperovic potentialandbenefitofgreenroofenergyrenovationofexistingresidentialbuildingswithaflatroofinbelgrade AT stankocoric potentialandbenefitofgreenroofenergyrenovationofexistingresidentialbuildingswithaflatroofinbelgrade AT snezanaisakovic potentialandbenefitofgreenroofenergyrenovationofexistingresidentialbuildingswithaflatroofinbelgrade AT dragoslavsumarac potentialandbenefitofgreenroofenergyrenovationofexistingresidentialbuildingswithaflatroofinbelgrade |