Technological advancements towards the net-zero energy communities: A review on 23 case studies around the globe

Ullah, Khan Rahmat; Prodanovic, Veljko; Pignatta, Gloria; Deletić, Ana; Santamouris, Mat

doi:10.1016/j.solener.2021.06.056

Cited by 48 publications

(16 citation statements)

References 61 publications

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“…The literature noted that in building scale, the performance indicators are standard and straightforward to compare with other low energy building concepts, such as passive and zero-energy buildings, by following energy use intensity (EUI) [204][205][206][207]. Unlike PEB, comparing PEC with other low energy communities are confusing because of the nonuniformity of the indicators; some projects follow EUI, and others follow net annual energy imported from the grid (MWh/a) [208][209][210][211][212][213][214]. PEBs are quantitatively compared with the traditional buildings, passive buildings, and zero energy buildings in Figure 8.…”

Section: Renewable Energy System Between Peb and Pecmentioning

confidence: 99%

“…ies 2021, 14, x FOR PEER REVIEW 32 of of the non-uniformity of the indicators; some projects follow EUI, and others follow n annual energy imported from the grid (MWh/a) [208][209][210][211][212][213][214]. PEBs are quantitatively com pared with the traditional buildings, passive buildings, and zero energy buildings in Fi ure 8.…”

Section: Renewable Energy System Between Peb and Pecmentioning

confidence: 99%

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State-of-the-Art Review of Positive Energy Building and Community Systems

Kumar

Cao

2021

Energies

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A positive energy system that produces more renewable energy than its demand while ensuring appropriate comfort levels is an excellent path towards increasing the portion of renewable energy, reducing carbon emission, and increasing the energy system’s overall performance. In particular, it has been believed as step forward towards zero energy systems. Recent progress in positive energy building and community levels is gaining interest among different stakeholders. However, an inadequate understanding of the positive energy system is widely noticed in many projects, and a shortage of standard details on the positive energy system still prevails in the research community. Therefore, a state-of-the-art review of positive energy building and community is conducted in this paper. Firstly, this paper begins with the definitions and concepts of positive energy buildings and communities. Secondly, it comprehensively describes the energy supplies, demands, indicators, storage, energy management, roles of stakeholders, and bottlenecks of positive energy systems. Thirdly, the main differences between positive energy buildings and communities are summarized. Fourthly, the impact of smart energy grids and new energy vehicles on the positive energy buildings and communities is derived. As a conclusion, this paper shows that even though all the energy-efficient buildings such as passive buildings, nearly zero energy buildings, zero energy buildings, positive energy buildings look like an up-trending scale of renewable penetration, considerable differences are visible among all, and the same thing applies to the community level. Furthermore, considerable differences exist when comparing between positive buildings and communities regarding both the technical and economic perspectives.

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Section: Renewable Energy System Between Peb and Pecmentioning

confidence: 99%

Section: Renewable Energy System Between Peb and Pecmentioning

confidence: 99%

State-of-the-Art Review of Positive Energy Building and Community Systems

Kumar

Cao

2021

Energies

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“…[5] Zero-energy buildings (ZEBs) represent a promising solution, as they rely exclusively on renewable sources to fulfill their energy requirements, ensuring that their yearly energy consumption is supplied by renewable resources. [6,7] These buildings usually are connected to the local electricity grid and have a two-way interaction with the grid. During the peak time of ZEBs energy consumption, they take electricity from the grid.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Design and Transient Analysis of Novel Off‐Grid Zero Energy and Nearly Zero Emission Building with Hydrogen‐Integrated Storage System

Maleki Dastjerdi,

Ardehali,

Naseryar

2024

Energy Tech

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The present study investigates the provision of heating, cooling, electricity, and domestic hot water consumption for a 100 m2 off‐grid zero‐energy residential building housing four occupants. Notably, the building is equipped with a hydrogen stove for cooking, and its electricity consumption is sustained throughout the year using renewable energies, independently of the electrical grid, with hydrogen energy storage. Using a Trombe wall for heating, surplus power is converted and stored in a dedicated hydrogen tank. TRNSYS software models analyze the system, demonstrating thermal comfort for 98.3% of the year. With 83 m2 of photovoltaic panels, the house operates off‐grid, slashing CO2 emissions by 8154.7 kg annually by reducing boiler energy consumption through waste heat utilization. The hydrogen tank minimizes the required battery size while the Trombe wall significantly contributes to heating, especially in colder climates. Remarkably, the building's renewable energy usage curtails emissions up to 8.5 times more than a Toyota Prius, showcasing its environmental impact in reducing greenhouse gas emissions.

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“…In addition, ZEBs not only improve the performance of buildings, but also enhance the living comfort through continuous exploration and optimization [13]. Due to the advantages of energy conservation and emission reduction, the development of construction and renovation methods, and the policy support for studies on ZEBs [14,15], ZEBs have been rapidly promoted worldwide and the number of ZEB projects has increased significantly [16].…”

Section: Introductionmentioning

confidence: 99%

Energy-Saving Design Strategies of Zero-Energy Solar Buildings—A Case Study of the Third Solar Decathlon China

et al. 2023

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Solar Decathlon is a multi-disciplinary international competition that integrates energy-saving design strategies to design, build and operate zero-energy solar houses. This study focused on the 15 entries in the third Solar Decathlon China. It summarized their energy-saving design strategies into strategies of architectural design, equipment management, energy acquisition and intelligent regulation, and extracted a total of 22 key design elements. Based on the scoring results of the competition, this study analyzed the application of different design strategies with qualitative analysis; through quantitative analysis, 22 design elements were associated with the score, and the impact of different strategies on the score was comprehensively analyzed. As revealed in the data, design concept, functional structure and application type of renewable energy are significantly correlated with and have a great impact on the score; in contrast, building area and thermal buffer space are not significantly correlated with the score. On the basis of data analysis, this study provides a quantitative decision basis for the energy-saving design strategy of zero-energy buildings, and establishes an empirical model for the design of zero-energy solar buildings in Zhangbei County, Zhangjiakou City. This paper is helpful for the design practice and application of subsequent studies on ZEBs.

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Technological advancements towards the net-zero energy communities: A review on 23 case studies around the globe

Cited by 48 publications

References 61 publications

State-of-the-Art Review of Positive Energy Building and Community Systems

State-of-the-Art Review of Positive Energy Building and Community Systems

Comprehensive Design and Transient Analysis of Novel Off‐Grid Zero Energy and Nearly Zero Emission Building with Hydrogen‐Integrated Storage System

Energy-Saving Design Strategies of Zero-Energy Solar Buildings—A Case Study of the Third Solar Decathlon China

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