Modern Energy Sources for Sustainable Buildings: Innovations and Energy Efficiency in Green Construction
Abstract
:1. Introduction
2. Emerging Technologies
2.1. Fuel Cells
2.2. Biomass Energy
2.3. Geothermal Heating and Heat Pumps
2.4. Hybrid Energy Systems
2.5. Gravity-Based Energy Storage
3. Integrated Approach
4. Modern Energy Sources
4.1. Solar Energy
4.2. Wind Energy
4.3. Geothermal Energy
4.4. Gravity Energy Generators
5. Smart Technologies and Energy Management
5.1. Efficiency and Benefits
5.2. Monitoring and Data Analysis
5.3. Analysis Supporting Sustainable Development
6. Examples of Renewable Energy Applications
6.1. Bullitt Center, Seattle, DC, USA
6.2. The Edge, Amsterdam, The Netherlands
6.3. Bosco Verticale, Milan, Italy
6.4. One Central Park, Sydney, Australia
7. Justification for Investing in Modern Energy Sources
7.1. Costs Compared to Traditional Solutions
7.2. Cost–Benefit Analysis
7.3. Operating Costs—Comparative Table
7.4. Implementation Examples and Benefits
7.4.1. Bullitt Center, Seattle, DC, USA
- Costs: the investment value was approximately USD 30 million.
- Systems: photovoltaic panels have been installed, and a rainwater collection system has been implemented.
- The estimated annual energy savings are approximately USD 200,000 [59].
7.4.2. Reykjavik, Iceland
- Costs: the construction of the city’s geothermal systems was estimated at approximately EUR 700 million.
- Systems: geothermal water is used to heat 90% of buildings.
- This system has been found to be significantly more cost-effective than coal-based alternatives [67].
7.4.3. District Heating Networks in Austria
- Costs: the construction of the biomass network averaged EUR 3 million per 10 km.
- Systems: biomass heating has been successfully implemented in 40 small towns.
- The benefits of this initiative are numerous; it is estimated that CO2 emissions have been reduced by 30% [66].
7.4.4. Research Stations in Antarctica
- Costs: hybrid system installations (PV + wind) cost approximately USD 5 million.
- Systems: hybrid systems have the potential to provide energy year-round.
- This system has led to a significant reduction in fossil fuel consumption [67].
7.4.5. One Central Park, Sydney, Australia
- Costs: the total investment cost was AUD 2 billion.
- Systems: photovoltaic (PV), water recycling system, vegetation that improves the microclimate.
- The benefits that have been identified include significant energy savings and improved quality of life for residents [69].
8. The Future of Smart Cities and Sustainable Development
8.1. Challenges and Barriers
8.2. Key Requirements of Modern Cities
8.3. Fundamental Needs of Modern Cities
- Housing Space: Urbanization has made the housing space increasingly valuable. The efficient use of the available space in densely populated cities is crucial and should include residential areas, green spaces, and public spaces [82].
- Access to Clean Water: Ensuring clean drinking water is essential for public health. Cities must invest in water infrastructure that ensures efficient delivery, purification, and conservation of water [83].
- Eco-Friendly Transportation: Developing sustainable transport systems, such as bicycles, public transportation, and car-sharing programs, is necessary to reduce congestion and emissions. Data-driven traffic management further improves transport efficiency [84].
- Recreational Areas: Green urban spaces and recreational areas are essential to improve quality of life. These spaces should cater to different age groups and social needs, ensuring inclusivity [85].
- Healthcare Services: A growing population requires well-adapted healthcare systems. Investments in hospitals, clinics, and other healthcare infrastructure are vital to providing adequate care [86].
9. Discussion
9.1. Energy Self-Sufficiency
9.2. Benefits of Renewable Energy Integration
9.3. Testimonials
- The Bullitt Center has become a model for a net-zero energy office building thanks to solar panel installations and rainwater harvesting systems.
9.4. Challenges and Directions
- Infrastructure Investment: many cities struggle with outdated energy infrastructure, making it difficult to adopt modern solutions.
- Workforce Training: new technologies require skilled workers for installation, maintenance, and operation.
- Supportive policies for renewable energy: establishing financial incentives and regulatory frameworks is crucial for accelerating renewable energy adoption.
10. Conclusions
Funding
Data Availability Statement
Conflicts of Interest
References
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Technology | Initial Costs (USD/kW) | Operating Costs (USD/Year) | Advantages | Disadvantages | Example Applications |
---|---|---|---|---|---|
Photovoltaics (PV) | 3000–6000 | <200 | CO2 emission reduction, fuel independence | No production at night, requires storage | Bullitt Center, Seattle, DC, USA [62] |
Wind Energy | 10,000+ | <500 | Works at night, is not affected by cloud cover | Requires favorable wind conditions | The Edge, Amsterdam, The Netherlands [63] |
Heat Pumps | 15,000/unit | Low | High efficiency (COP 3–4), year-round operation | Dependent on local geothermal conditions | Passive houses, energy-efficient buildings [64] |
Gravity Power Plants | 20,000+ | Very low | Energy storage, grid stabilization | High construction costs, requires infrastructure | Pilot projects in urban areas [65] |
Biomass | 2000–4000 | Medium | Uses organic waste, recycling | Emissions, requires continuous fuel supply | District heating networks in Austria and Germany [66] |
Geothermal Energy | 5000–8000 | Low | Stable energy source, high efficiency | High initial costs, geological constraints | Reykjavik, Iceland [67] |
Hybrid Systems (PV + Wind) | 8000–12,000 | Medium | Reduces power supply interruptions | Complex integration, high installation costs | Research stations in Antarctica [68] |
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Lewandowski, K. Modern Energy Sources for Sustainable Buildings: Innovations and Energy Efficiency in Green Construction. Energies 2025, 18, 1121. https://doi.org/10.3390/en18051121
Lewandowski K. Modern Energy Sources for Sustainable Buildings: Innovations and Energy Efficiency in Green Construction. Energies. 2025; 18(5):1121. https://doi.org/10.3390/en18051121
Chicago/Turabian StyleLewandowski, Krzysztof. 2025. "Modern Energy Sources for Sustainable Buildings: Innovations and Energy Efficiency in Green Construction" Energies 18, no. 5: 1121. https://doi.org/10.3390/en18051121
APA StyleLewandowski, K. (2025). Modern Energy Sources for Sustainable Buildings: Innovations and Energy Efficiency in Green Construction. Energies, 18(5), 1121. https://doi.org/10.3390/en18051121