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

Abstract

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.

Supercapacitors in the Light of Solid Waste and Energy Management: A Review

“…Experimental and field data for high‐rise buildings revealed energy efficiencies up to 23.1% and 54.5%, respectively, favoring practical application of the strategy in near future. [ 33 ]…”

“…[11][12][13][14][15][16][17] They can be utilized in a wide range of applications such as electric vehicles (EVs) and hybrid electric vehicles (HEVs), pulsing techniques, digital devices [18][19][20][21][22][23][24][25][26][27] as well as in other fields of energy and power quality management. [28][29][30][31][32][33][34][35][36][37] Meanwhile, management of material wastes generated from various sources including electrochemical devices has long been a matter of concern. A study by World Bank revealed that food and green wastes account for about 44% of the total waste generated in the world (Figure 1a).…”

Supercapacitor-Based Energy Storage in Elevators to Improve Energy Efficiency of Buildings

“…However, the elevator traffic and characteristic parameters of the elevator speed profile were not considered. In [26], an energy-saving approach was proposed for a group of elevators based on a DC microgrid. An energy-efficient device based on supercapacitors was developed for the elevator group, and experimental tests showed that the energy savings ranged from 15.9 to 23.1% and 24.1 to 54.5% depending on the experiments conducted.…”

Super-capacitor energy storage system to recuperate regenerative braking energy in elevator operation of high buildings

“…In elevator operation, regenerative braking energy is mainly dissipated on braking resistors [1], [2]. Therefore, how to reduce energy consumption in these vertical transportation systems has long been one of hot research issues to pay much attention from scientists, engineers.…”