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The Development Trends of Existing Building Energy Conservation and Emission Reduction



 

The Development Trends of Existing Building Energy Conservation and Emission Reduction

Abstract

The energy conservation of existing buildings is critical in reducing global carbon emissions and building energy consumption. Research on building energy conservation typically focuses on both existing and new buildings. However, studies specifically addressing the energy conservation of existing buildings are relatively limited and often lack a systematic and in-depth review. This study utilizes bibliometric and qualitative analysis methods to select and analyze relevant literature from 2008 to 2022, aiming to provide a comprehensive review.

Seven key indicators were chosen to evaluate the selected articles: impact factor, total publications, average publication year, total/average citations, and total/average normative citations. These indicators were analyzed by country, institution, journal, keywords, and highly cited literature. Through this analysis, three major research themes in existing building energy efficiency were identified:

  1. Influencing Factors and Energy-Saving Obstacles of Energy Consumption
  2. Energy-Saving Measures
  3. Energy-Saving Optimization and Its Evaluation Method

Based on the bibliometric results, the study qualitatively analyzes highly cited literature and the latest research outcomes to identify future development trends and potential directions for energy conservation in existing buildings throughout their life cycle.

Key Findings and Recommendations

Influencing Factors and Energy-Saving Obstacles

Understanding the factors influencing energy consumption and the obstacles to energy-saving is essential. These factors include building age, design, maintenance practices, and occupant behavior. Identifying and overcoming these obstacles is crucial for effective energy conservation.

Energy-Saving Measures

Several energy-saving measures have been proposed and implemented in existing buildings, such as:

  • Improved Insulation: Enhancing the thermal performance of building envelopes.
  • Efficient HVAC Systems: Upgrading to high-efficiency heating, ventilation, and air conditioning systems.
  • Lighting Upgrades: Replacing traditional lighting with LED or other energy-efficient alternatives.
  • Smart Controls: Utilizing smart thermostats and building management systems to optimize energy use.

Energy-Saving Optimization and Evaluation

Optimization techniques and evaluation methods for energy-saving measures are vital for assessing their effectiveness and guiding future improvements. These include:

  • Energy Audits: Conducting comprehensive energy audits to identify areas of improvement.
  • Simulation Models: Using building energy simulation models to predict and optimize energy performance.
  • Performance Metrics: Establishing key performance indicators (KPIs) to monitor and evaluate energy savings.

Future Development Trends

Based on the analysis, future trends in energy conservation for existing buildings are identified as follows:

  1. Technology Empowerment
    • Renewable Energy Integration: Utilizing solar, wind, and other renewable energy sources.
    • Negative Carbon Technologies: Implementing technologies that capture and store carbon emissions.
    • Advanced Technologies: Leveraging "artificial intelligence + Internet of Things + 5G" and cogeneration systems for enhanced energy management.
  2. Regulations and Policy Incentives
    • Demand Response Strategies: Implementing time-of-use pricing and other strategies to guide and restrict user behavior.
    • Carbon Tax and Trading: Considering carbon taxes and carbon trading to incentivize energy conservation.
    • Resilient Distribution Grids: Increasing the capacity and resilience of distribution grids to support energy-efficient buildings.

Conclusion

This comprehensive review provides innovative ideas for the energy-saving renovation of existing buildings. By utilizing advanced technologies and formulating effective regulations and policy incentives, existing buildings can become energy-efficient, economical, intelligent, and comfortable in the future. The study highlights the importance of a holistic approach, considering the entire life cycle of buildings to achieve significant energy conservation and emission reduction.

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