Abstract
To cope with ‘Post-2020’, each country set its national greenhouse gas (GHG) emissions reduction target (e.g., South Korea: 37%) below its business-as-usual level by 2030. Toward this end, it is necessary to implement the net-zero energy building (nZEB) in the building sector, which accounts for more than 25% of the national GHG emissions and has a great potential to reduce GHG emissions. In this context, this study conducted a state-of-the-art review of nZEB implementation strategies in terms of passive strategies (i.e., passive sustainable design and energy-saving technique) and active strategies (i.e., renewable energy (RE) and back-up system for RE). Additionally, this study proposed the following advanced strategies for nZEB implementation according to a building’s life cycle: (i) integration and optimization of the passive and active strategies in the early phase of a building’s life cycle; (ii) real-time monitoring of the energy performance during the usage phase of a building’s life cycle. It is expected that this study can help researchers, practitioners, and policymakers understand the overall implementation strategies for realizing nZEB.
Highlights
Previous studies related to net-zero energy building (nZEB) can be classified into two categories based on the following perspectives: (i) passive strategies; and (ii) active strategies
Passive strategies were classified as passive sustainable design and energy-saving techniques (EST)
Most studies related to the passive strategies were analyzed for building energy performance according to design variables via energy simulation tools
Summary
South Korea recorded the highest average temperature (i.e., 13.6 ◦C) in the history of weather observation due to the effect of global warming [2] These increases in global average temperature were largely attributed to the GHG effect of human activity (e.g., consumption of fossil fuels such as petroleum, natural gas, coal, etc.) and not of a natural phenomenon (e.g., El Nino) [3]. For this reason, meteorologists were worried about the serious effects of climate change on all areas of human life, such as agriculture, national security, national health, water supply, and disease, and called on countries to establish the countermeasures.
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