scholarly journals Energy Saving Quantitative Analysis of Passive, Active, and Renewable Technologies in Different Climate Zones

2021 ◽  
Vol 11 (15) ◽  
pp. 7115
Author(s):  
Chul-Ho Kim ◽  
Min-Kyeong Park ◽  
Won-Hee Kang
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Energy Saving ◽  
High Performance ◽  
Energy Systems ◽  
Outdoor Air ◽  
Climate Zones ◽  
Renewable Energy Systems ◽  
Active Systems ◽  
High Performance Buildings

The purpose of this study was to provide a guideline for the selection of technologies suitable for ASHRAE international climate zones when designing high-performance buildings. In this study, high-performance technologies were grouped as passive, active, and renewable energy systems. Energy saving technologies comprising 15 cases were categorized into passive, active, and renewable energy systems. EnergyPlus v9.5.0 was used to analyze the contribution of each technology in reducing the primary energy consumption. The energy consumption of each system was analyzed in different climates (Incheon, New Delhi, Minneapolis, Berlin), and the detailed contributions to saving energy were evaluated. Even when the same technology is applied, the energy saving rate differs according to the climatic characteristics. Shading systems are passive systems that are more effective in hot regions. In addition, the variable air volume (VAV) system, combined VAV–energy recovery ventilation (ERV), and combined VAV–underfloor air distribution (UFAD) are active systems that can convert hot and humid outdoor temperatures to create comfortable indoor environments. In cold and cool regions, passive systems that prevent heat loss, such as high-R insulation walls and windows, are effective. Active systems that utilize outdoor air or ventilation include the combined VAV-economizer, the active chilled beam with dedicated outdoor air system (DOAS), and the combined VAV-ERV. For renewable energy systems, the ground source heat pump (GSHP) is more effective. Selecting energy saving technologies that are suitable for the surrounding environment, and selecting design strategies that are appropriate for a given climate, are very important for the design of high-performance buildings globally.

Fe, Ni-codoped W18O49 grown on nickel foam as bifunctional electrocatalyst for boosted water splitting

2021 ◽  
Author(s):  
Guojuan Hai ◽  
Jianfeng Huang ◽  
Liyun Cao ◽  
Koji Kajiyoshi ◽  
Long Wang ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Water Splitting ◽  
High Performance ◽  
Solvothermal Method ◽  
Nickel Foam ◽  
Energy Systems ◽  
Cost Effective ◽  
Bifunctional Catalysts ◽  
Renewable Energy Systems ◽  
Bifunctional Electrocatalyst

Designing cost-effective bifunctional catalysts with high-performance and durability is of great significance for the renewable energy systems. Herein, a typical Fe, Ni-codoped W18O49/NF was prepared via a simple solvothermal method....

scholarly journals Realization of a Small Residential Building with Zero CO2 Emissions Due to Energy Use in Crete, Greece

2017 ◽  
Vol 4 (1) ◽  
pp. 112 ◽  
Author(s):  
John Vourdoubas
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Co2 Emissions ◽  
Energy Use ◽  
Residential Building ◽  
Energy Systems ◽  
Solar Pv ◽  
Renewable Energy Systems ◽  
The Creation ◽  
Solid Biomass

European buildings account for large amounts of energy consumption and CO2 emissions and current EU policies target in decreasing their energy consumption and subsequent CO2 emissions. Realization of a small, grid-connected, residential building with zero CO2 emissions due to energy use in Crete, Greece shows that this can be easily achieved. Required heat and electricity in the building were generated with the use of locally available renewable energies including solar energy and solid biomass. Annual energy consumption and on-site energy generation were balanced over a year as well as the annual electricity exchange between the building and the grid. Technologies used for heat and power generation included solar-thermal, solar-PV and solid-biomass burning which are reliable, mature and cost-effective. Annual energy consumption in the 65 m2 building was 180 KWh/m2 and its annual CO2 emissions were 84.67 kgCO2/m2. The total capital cost of the required renewable energy systems was estimated at approximately 10.77% of its total construction cost, and the required capital investments in renewable energy systems, in order to achieve the goal of a residential building with zero CO2 emissions due to energy use, were 1.65 € per kgCO2, saved annually. The results of this study prove that the creation of zero CO2 emissions buildings is technically feasible, economically attractive and environmentally friendly. Therefore they could be used to create future policies promoting the creation of this type of building additionally to the existing policies promoting near-zero energy buildings.

scholarly journals Energy Self-Sufficient Public Utility Building—Concept

Proceedings ◽  
2020 ◽  
Vol 51 (1) ◽  
pp. 18
Author(s):  
Karolina Dec ◽  
Elżbieta Broniewicz
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Energy Balance ◽  
Energy Systems ◽  
Current Data ◽  
Public Utility ◽  
Renewable Energy Systems ◽  
Consumption Profile ◽  
The Eu

In this study, the idea of an energy self-sufficient public utility building was presented, as well as its energy balance components and the possibility of powering it with renewable sources. The annual energy consumption profile of the building was analyzed. Current data concerning the production of electricity from Renewable Energy Systems (RES) were presented. The applicable provisions of the Directive of the European Parliament and the EU Council on energy efficiency were discussed.

scholarly journals High Performance Inverter For Renewable Energy Systems

2007 ◽  
Vol 12 (3) ◽  
pp. 253-260
Author(s):  
Sérgio Daher ◽  
Jürgen Schmid ◽  
Fernando Luiz Marcelo Antunes
Keyword(s):  
Renewable Energy ◽  
High Performance ◽  
Energy Systems ◽  
Renewable Energy Systems

On a New Chain Planetary Transmission for Renewable Energy Systems - Part I: Product Design

2015 ◽  
Vol 760 ◽  
pp. 147-152 ◽  
Author(s):  
Radu Saulescu ◽  
Mircea Neagoe ◽  
Codruta Jaliu ◽  
Olimpiu Munteanu
Keyword(s):  
Renewable Energy ◽  
Product Design ◽  
High Performance ◽  
Energy Systems ◽  
Small Hydropower ◽  
Compact Structure ◽  
Good Efficiency ◽  
Renewable Energy Systems ◽  
Planetary Transmission ◽  
Mechanical Transmissions

Mechanical transmissions are frequently used in renewable energy systems (RES), either as speed reducers in solar tracking systems (e.g. worm drive, planetary gear), or as speed increasers in small hydropower converters or wind turbines. Most of them are conventional transmissions characterized by large overall dimensions and/or low efficiencies; therefore, new mechanical transmissions with higher performances are highly investigated. The paper presents the development of an innovative chain planetary transmission for hydro/wind applications. The speed increaser transmission requires a well-defined transmission ratio according to the application (3 – 5 for hydro, 6 – 30 for wind), good efficiency, relative simple and compact structure, easy maintenance, and low-cost. The final proposed solution overcomes some limits of the RES transmissions, significantly increasing the efficiency while decreasing the system size and eliminating the chain pre-stressing. The steps of the product design process applied for innovative generation of high performance mechanical transmissions are shown in the Part I. The proposed chain planetary transmission integrated into a micro hydropower application is analyzed in the Part II: virtual prototyping, physical testing and optimization stages and results are detailed.

Consumers Energy Efficiency Practices

2012 ◽  
Vol 433-440 ◽  
pp. 3870-3872
Author(s):  
A. Kabalan
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Power Systems ◽  
Energy Saving ◽  
Energy Savings ◽  
Solar Power ◽  
Energy Systems ◽  
Commercial Buildings ◽  
Renewable Energy Systems

This paper aims to give the consumer a list of energy saving practices in order to reduce the usage of energy in residential and commercial buildings. Such practices are crucial to any residential or commercial setting before embarking on installing renewable energy systems such as solar power systems. Those methods are relatively cheap to implement and has the potential to provide energy savings up to 30 %.

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