scholarly journals A Novel Reconstruction Approach to Elevator Energy Conservation Based on a DC Micro-Grid in High-Rise Buildings

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 33 ◽  
Author(s):  
Yongming Zhang ◽  
Zhe Yan ◽  
Feng Yuan ◽  
Jiawei Yao ◽  
Bao Ding
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
High Energy ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
High Rise ◽  
Field Data Collection ◽  
Micro Grid ◽  
Save Energy

Elevators were reported to cause an important part of building energy consumption. In general, each elevator has two operation states: The load state and power regeneration state. During operation, it has the potential to save energy by using regeneration power efficiently. In existing research, a set of energy storage devices are installed for every elevator, which is highly costly. In this paper, an energy conservation approach for elevators based on a direct current (DC) micro-grid is proposed, which has better economy. Then, an innovative energy-efficient device for the elevator group is designed based on a supercapacitor with similar characteristics and lifetimes. In a high-rise building case study, the experimental test and field data collection show that the innovative approach could result in a high energy efficiency within 15.87–23.1% and 24.1–54.5%, respectively. It is expected that the proposed method and designed device could be employed practically, saving energy consumption for elevator reconstruction.

scholarly journals Monocarborane cluster as a stable fluorine-free calcium battery electrolyte

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kazuaki Kisu ◽  
Sangryun Kim ◽  
Takara Shinohara ◽  
Kun Zhao ◽  
Andreas Züttel ◽  
...  
Keyword(s):  
Room Temperature ◽  
Coulombic Efficiency ◽  
Low Cost ◽  
Ionic Conductivities ◽  
High Energy ◽  
High Energy Density ◽  
Free Calcium ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Battery Electrolyte

AbstractHigh-energy-density and low-cost calcium (Ca) batteries have been proposed as ‘beyond-Li-ion’ electrochemical energy storage devices. However, they have seen limited progress due to challenges associated with developing electrolytes showing reductive/oxidative stabilities and high ionic conductivities. This paper describes a calcium monocarborane cluster salt in a mixed solvent as a Ca-battery electrolyte with high anodic stability (up to 4 V vs. Ca2+/Ca), high ionic conductivity (4 mS cm−1), and high Coulombic efficiency for Ca plating/stripping at room temperature. The developed electrolyte is a promising candidate for use in room-temperature rechargeable Ca batteries.

Modeling of a Leg System to Illustrate the Feasibility of Energy Recovery in Walking Machines

1994 ◽  
Author(s):  
Sivakumar Dhandapani ◽  
Madara M. Ogot
Keyword(s):  
Energy Consumption ◽  
Energy Recovery ◽  
Stance Phase ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
The Past ◽  
Walking Machines ◽  
Immediate Recovery ◽  
Practical Design ◽  
One Step

Abstract A key consideration in the design of walking machines is the minimization of energy consumption. Two main avenues of research have been pursued in the past (a) finding an optimal gait which reduces energy consumption or (b) the employment of energy storage devices to recover energy from one step to the next. This study follows the latter approach, which has hitherto concentrated on hopping machines. Several practical design considerations for energy recovery in multi-legged walking machines, where a stance phase prevents the immediate recovery of energy from one step to the next, are investigated. Two schemes, passive and active locking, are introduced. The simplified models presented serve to illustrate the feasibility of these schemes.

Rational design of Li3VO4@carbon core–shell nanoparticles as Li-ion hybrid supercapacitor anode materials

2017 ◽  
Vol 5 (39) ◽  
pp. 20969-20977 ◽  
Author(s):  
Eunho Lim ◽  
Won-Gwang Lim ◽  
Changshin Jo ◽  
Jinyoung Chun ◽  
Mok-Hwa Kim ◽  
...  
Keyword(s):  
Anode Materials ◽  
Rational Design ◽  
High Energy ◽  
Rate Performance ◽  
Hybrid Supercapacitor ◽  
Energy Storage Devices ◽  
Shell Nanoparticles ◽  
Storage Devices ◽  
Li Ion ◽  
Core Shell Nanoparticles

A Li-ion hybrid supercapacitor (Li-HSC) delivering high energy within seconds (excellent rate performance) with stable cycle life is one of the most highly attractive energy storage devices.

scholarly journals Basic Passive Side-Day lighting Considerations for High Rise office Building

2020 ◽  
Vol 9 (5) ◽  
pp. 78-87
Keyword(s):  
Energy Consumption ◽  
Construction Industry ◽  
Positive Impact ◽  
Building Design ◽  
High Energy ◽  
Office Building ◽  
High Rise ◽  
Design Considerations ◽  
System A ◽  
Modern Era

High rise office building design is one of the essential buildings in construction industry due to the limited space especially in the urban area. After home, a high rise office building is an important space for human in modern era. Due to the issue of high energy consumption especially inefficient artificial light strategy, side-day lighting becomes the best solution for a high rise office building design. Despite providing efficient energy consumption, side-day lighting creates a positive impact to the worker as well as the office's indoor environment. Hence, this paper aims to explore the basic passive side-day lighting considerations that educate people especially for those who are involved in the building construction industry. Beside, this paper focuses on the passive design considerations due to the various advantages that not involved especially with complex electrical and mechanical system. A systematic literature review is the main methodology for this paper to identify the basic passive side-day lighting considerations for a high rise office building design. Base on this research, it revealed that eight elements for building design considerations should be applied to provide a better day lighting impact for a high rise office building design. Considerations for non-building design aspects should also need to be applied since those aspects contribute to produce a better day lighting impact for a high rise office building design.

Template Orienting One-Dimensional Schiff-Base Polymer: towards Flexible Nitrogen-enriched Carbonaceous Electrodes with Ultrahigh Electrochemical Capacity

Nanoscale ◽  
2021 ◽  
Author(s):  
Zhichang Xiao ◽  
Junwei Han ◽  
Haiyong He ◽  
Xinghao Zhang ◽  
Jing Xiao ◽  
...  
Keyword(s):  
Schiff Base ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
High Power Density ◽  
Energy Storage Devices ◽  
One Dimensional ◽  
Storage Devices ◽  
Electrochemical Capacity ◽  
Base Polymer

Lithium-ion capacitors (LICs) have attracted much attention considering their efficient combination of high energy density and high-power density. However, to meet the increasing requirements of energy storage devices and the...

Unraveling kinetics and mass transport effects on two-electron storage in radical polymers battery

2021 ◽  
Author(s):  
Kai Zhang ◽  
Yuan Xie ◽  
Zhongfan Jia ◽  
Benjamin B. Noble ◽  
Kenichi Oyaizu ◽  
...  
Keyword(s):  
Nitroxide Radical ◽  
High Energy ◽  
Energy Storage Devices ◽  
Electron Storage ◽  
Storage Devices ◽  
High Power Output ◽  
Transport Effects ◽  
Mass Transport Effects ◽  
Redox Molecules ◽  
High Energy Storage

Organic redox molecules exhibiting multi-electron storage and fast electron transfer kinetics are ideal compounds for sustainable high-energy storage devices with high-power output. Nitroxide radical polymers (NRPs) are the representative materials...

Synthesis of NiCo2S4@NiMoO4 Nanosheets with Excellent Electrochemical Performance for Supercapacitor

2021 ◽  
Author(s):  
Yucai Li ◽  
Yan Zhao ◽  
Shiwei Song ◽  
Jian wang
Keyword(s):  
Electrode Materials ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Cycle Performance ◽  
Ni Foam ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Excellent Electrochemical Performance ◽  
Potential Applications

Abstract Core-shell structured NiCo2S4@NiMoO4 is considered to be one of the most promising electrode materials for supercapacitors due to its high specific capacitance and excellent cycle performance. In this work, we report NiCo2S4@NiMoO4 nanosheets on Ni foam by two-step fabricated method. The as-obtained product has high capacitance of 1102.5 F g− 1 at 1 A g− 1. The as-assembled supercapacitor has also a high energy density of 37.6 W h kg− 1 and superior cycle performance with 85% capacitance retention. The electrode materials reported here might exhibits potential applications in future energy storage devices.

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