scholarly journals Economic Solution of the Tri-Generation System Using Photovoltaic-Thermal and Ground Source Heat Pump for Zero Energy Building (ZEB) Realization

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3304 ◽  
Author(s):  
Sangmu Bae ◽  
Yujin Nam ◽  
Ivor da Cunha
Keyword(s):  
Renewable Energy ◽  
Energy Analysis ◽  
Design Method ◽  
Energy Systems ◽  
Zero Energy ◽  
Generation System ◽  
Local Conditions ◽  
Efficient System ◽  
Renewable Energy Systems ◽  
Zero Energy Building

The zero energy building (ZEB) is being introduced as a new energy policy in the building sector. Accordingly, to realize the ZEB, renewable energy systems that can produce energy are essential. Various hybrid systems are being proposed to develop a more efficient system than individual renewable energy systems, among which tri-generation systems are attracting attention. In this study, in order to find an economic solution of a tri-generation system for the realization of ZEB, the simulation model using the dynamic energy analysis code was constructed and a feasibility study was conducted. Moreover, the conventional design method and the design method for ZEB realization were proposed, and the return on investment (ROI) was calculated according to four local conditions and two design methods. As a result of energy analysis, the energy self-sufficiency (ES) in Seoul, Ulsan, Ottawa and Toronto were calculated as 62%, 65.1%, 57.7%, and 60.2%, respectively. Moreover, results of feasibility analysis compared to a conventional system showed that the payback period of the tri-generation system in South Korea was within 13 years, and Canada was within 10 years.

scholarly journals Optimal Distribution of Renewable Energy Systems Considering Aging and Long-Term Weather Effect in Net-Zero Energy Building Design

2020 ◽  
Vol 12 (14) ◽  
pp. 5570 ◽  
Author(s):  
Yuehong Lu ◽  
Mohammed Alghassab ◽  
Manuel S. Alvarez-Alvarado ◽  
Hasan Gunduz ◽  
Zafar A. Khan ◽  
...  
Keyword(s):  
Markov Chain ◽  
Renewable Energy ◽  
Energy Systems ◽  
Aging Effect ◽  
Zero Energy ◽  
Generation System ◽  
Renewable Energy Systems ◽  
Net Zero Energy ◽  
Net Zero

Generation system interruptions in net-zero energy buildings (NZEBs) may result in missing the net-zero targets by a great margin. Consequently, it is significant to incorporate a realistic reliability model for renewable energy systems (RESs) that considers aging and long-term weather conditions. This study proposed a robust design optimization method that deals with the selection of RES to achieve NZEB. Different case studies were evaluated: 1. Deterministic approach; 2. Markov chain-based reliability without the aging effect; 3. Markov chain-based reliability with the aging effect. The results showed that the optimal sizes of RES, considering the aging effect, were much larger than the other two cases based on the annual energy balance. Moreover, the consideration of the aging effect on the reliability assessment of the generation system for NZEB opens a pathway for a more robust and economic design of RES.

The influence of climate change on renewable energy systems designed to achieve zero energy buildings in the present: A case study in the Brazilian Savannah

2020 ◽  
Vol 52 ◽  
pp. 101843 ◽  
Author(s):  
Emeli Lalesca Aparecida da Guarda ◽  
Renata Mansuelo Alves Domingos ◽  
Stefany Hoffmann Martins Jorge ◽  
Luciane Cleonice Durante ◽  
João Carlos Machado Sanches ◽  
...  
Keyword(s):  
Climate Change ◽  
Renewable Energy ◽  
Energy Systems ◽  
Zero Energy ◽  
Renewable Energy Systems ◽  
Brazilian Savannah ◽  
Zero Energy Buildings

scholarly journals Optimal Decision-Making of Renewable Energy Systems in Buildings in the Early Design Stage

2019 ◽  
Vol 11 (5) ◽  
pp. 1471 ◽  
Author(s):  
Seung Baek ◽  
Byung Lee
Keyword(s):  
Renewable Energy ◽  
Design Method ◽  
Energy Systems ◽  
Optimal Decision ◽  
Design Stage ◽  
Renewable Energy Systems ◽  
Early Design ◽  
Early Design Stage ◽  
Design Alternative ◽  
Design Alternatives

Renewable energy systems (RES) in buildings should be designed carefully, not only because of the need for an optimal design, but also to comply with related laws. Therefore, the design of RES in the buildings requires close collaboration between architects and engineers from the beginning of the design process. To support such collaboration, this study proposes a simplified design method for RES in buildings during the early design stage. By using the proposed design method, design alternatives that meet the required energy standards as suggested by law are first generated. Further designs are made to evaluate the performance and cost of the design alternatives and to find the optimal types of RES for the building. The study also uses a case study to verify the applicability of the design method to the early design stage. Although the performance and cost of the different design alternatives are similar, the implementation of each type of RES in each design alternative is different. Nonetheless, by analyzing performance patterns and the cost ratio of each type of RES in each design alternative, the study allows the most suitable type of RES to be chosen for the building.

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