Technical and Economic Feasibility of Multi-Family Social Housing and Nearly Zero-Energy Buildings in Southern Brazil
Abstract
:1. Introduction
2. Materials and Methods
2.1. Building Typology
2.2. Climatic Data
2.3. Simulation Parameters
2.4. Definition of the Thermal Performance Level
2.5. Definition of the Energy Performance Level
2.6. Sizing of the Renewable Energy Source
2.7. Economic Feasibility Analysis of Energy Efficiency Measures
3. Results and Discussion
3.1. Thermal Performance of the Representative Model
3.2. Energy Performance of the Representative Model
3.3. Energy Efficiency Measures
3.3.1. Energy Efficiency Measures of the Envelope
3.3.2. Energy Efficiency Measures of the Water Heating System
3.4. Energy Efficiency of the Nearly Zero-Energy Building
3.5. Economic Feasibility
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Element | Layers | Thickness (cm) | Conductivity (W/m·K) | Density (kg/m3) | Specific Heat (J/kg·K) |
---|---|---|---|---|---|
Aluminium foil | - | 0.01 | 230 | 2700 | 880 |
Rock wool (5 cm) | - | 5.0 | 0.045 | 96 | 750 |
Precast ceramic slab (12 cm) | Ceramic | 1.20 | 1.05 | 2000 | 920 |
Air chamber | 4.6 | Thermal resistance = 0.081 m2K/W | |||
Ceramic | 1.20 | 1.05 | 2000 | 920 | |
Mortar | 1.00 | 1.15 | 2000 | 1000 | |
Precast EPS slab (12 cm) | Concrete slab | 4.00 | 1.75 | 2200 | 1000 |
EPS and concrete | 7.00 | 0.223 | 373 | 1000 | |
Mortar | 1.00 | 1.15 | 2000 | 1000 |
Element | Thickness | Conductivity | Density | Specific Heat |
---|---|---|---|---|
(cm) | (W/m·K) | (kg/m3) | (J/kg·K) | |
Autoclaved cellular concrete block (7.5 × 30 × 60 cm) | 7.50 | 0.17 | 450 | 1000 |
EPS (2 cm) | 2.00 | 0.04 | 15 | 1420 |
Rock wall (5 cm) | 5.00 | 0.045 | 96 | 750 |
Gypsum board (2 cm) | 2.00 | 0.35 | 900 | 840 |
Energy Efficiency Class of the Envelope | Thermal Performance Level |
---|---|
Class A | Upper |
Class B | Intermediate |
Class C | Minimum |
Class D | Minimum |
Class E | - |
Nomenclature | Energy Efficiency Measures | |
---|---|---|
External Walls | Roof | |
Combination 1 | Autoclaved cellular concrete block (7.5 cm) and gypsum (2.5 cm) | Rock wool (5 cm) |
Combination 2 | Precast EPS slab (12 cm) | |
Combination 3 | EPS (2 cm) and gypsum board (2 cm) | Rock wool (5 cm) |
Combination 4 | Precast EPS slab (12 cm) | |
Combination 5 | Rock wool (5 cm) and gypsum board (2 cm) | Rock wool (5 cm) |
Combination 6 | Precast EPS slab (12 cm) |
Inflation Rate (% Per Year) | NPV (BRL) | IRR (% Per Year) | Payback (Year) |
---|---|---|---|
2.0 | 835,744.20 | 14.7 | 6.3 |
4.0 | 1,388,445.74 | 16.6 | 6.0 |
6.17 | 2,526,506.69 | 18.7 | 5.7 |
8.0 | 4,347,139.29 | 20.4 | 5.5 |
10.0 | 8,144,250.42 | 22.3 | 5.3 |
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Pierozan, E.; Piccinini Scolaro, T.; Watzko, E.S.; Ghisi, E. Technical and Economic Feasibility of Multi-Family Social Housing and Nearly Zero-Energy Buildings in Southern Brazil. Sustainability 2024, 16, 2608. https://doi.org/10.3390/su16072608
Pierozan E, Piccinini Scolaro T, Watzko ES, Ghisi E. Technical and Economic Feasibility of Multi-Family Social Housing and Nearly Zero-Energy Buildings in Southern Brazil. Sustainability. 2024; 16(7):2608. https://doi.org/10.3390/su16072608
Chicago/Turabian StylePierozan, Eduardo, Taylana Piccinini Scolaro, Elise Sommer Watzko, and Enedir Ghisi. 2024. "Technical and Economic Feasibility of Multi-Family Social Housing and Nearly Zero-Energy Buildings in Southern Brazil" Sustainability 16, no. 7: 2608. https://doi.org/10.3390/su16072608