scholarly journals Effect of an Electric Motor on the Energy Efficiency of an Electro-Hydraulic Forklift

10.5772/38796 ◽  
2012 ◽  
Author(s):  
Tatiana Minav ◽  
Lasse Laurila ◽  
Juha Pyrhne
Keyword(s):  
Energy Efficiency ◽  
Electric Motor

scholarly journals MODEL STUDIES WITH IDENTIFICATION OF ENERGY EFFICIENT MODES OF FUNCTIONING OF MAIN FAN UNITS

2021 ◽  
Vol 2 (53) ◽  
pp. 40-46
Author(s):  
I. Sinchuk ◽  
◽  
I. Peresunko ◽  
A. Somochkyn
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Electric Motor ◽  
Iron Ore ◽  
Electrical Energy ◽  
Multilevel Converter ◽  
Model Studies ◽  
Start Up ◽  
Priority Direction ◽  
Very High

Purpose. The paper analyzes the system and methods of starting synchronous electric motors of fans of the main ventilation of iron ore mines. It is concluded that it is necessary to modernize the method of starting a synchronous electric motor, despite the fact that the installed direct start-up system has a number of disadvantages, and negatively affects the energy indicators of the electromechanical complex of the main ventilation fan of mines. The priority direction in solving the complex of the above problems is the use of modern achievements in the field of semiconductor conversion technology, in terms of the development of effective circuits and methods for starting and controlling a synchronous electric drive. Originality. The method of separate regulation of size and frequency of output voltage of the multilevel converter of a clock at quasi-frequency start of the synchronous electric drive is offered, limits admissible values of starting currents to admissible values. Methodology. Simulation of transient processes of starting a synchronous electric motor with step-by-step changes in voltage and frequency of supply, which made it possible to determine the energy efficiency of this method. Result. A new method of starting with a step-by-step change in the voltage and frequency of a synchronous motor is proposed. The modeling of the proposed starting method for a synchronous electric motor with a fan torque on the motor shaft was carried out, while it allowed to get rid of the main drawback, namely, a large starting current and made it possible to increase the energy efficiency of the electromechanical complex of the main ventilation fans due to the fact that the consumed active energy during start-up will decrease approximately 50% compared to a direct starting system. Practical value. The proposed method and the obtained results of the study made it possible to prove that the effectiveness of the proposed method is very high and this will save most of the electrical energy when starting the fans of the main ventilation of iron ore mines. Figures 15, references 15

scholarly journals DESIGNING PRESS MACHINE CANNED SOFTDRINK TO REDUCE VOLUME WASTE OF CANNED SOFTDRINK

Tibuana ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 15-19
Author(s):  
Nushron Ali Mukhtar
Keyword(s):  
Energy Efficiency ◽  
Compressive Strength ◽  
Human Resources ◽  
Electric Motor ◽  
Completion Time ◽  
Rapid Progress ◽  
Total Cost ◽  
Final Project ◽  
Automatic Press ◽  
Human Energy

Many processes in the industry originally done by humans, are now being replaced by machines that are driven automatically by simply giving commands / programs or just simple / semi-automatic buttons. This is intended for human energy efficiency and the effectiveness of completion time, due to the rapid progress of human resources (Human Resources) so that it is no longer possible to do the work manually with great energy.This Final Project aims to plan, manufacture, and test semi-automatic press machines for the purpose of automation of engine press. Methods in the design of this machine is the study of observation. From the design is done, generated a semi-automatic press machine, with the following specifications: Capacity of compressive strength with the power of pressing 150 kg. The electric motor used has a power of 0.5 PK and 1400 rpm rotation. Total cost for the manufacture of 1 unit of this machine is Rp 1.714.000, -.

scholarly journals Thermodynamic and Economic Analysis of Trigeneration System Comprising a Hierarchical Gas-Gas Engine for Production of Electricity, Heat and Cold

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 1006 ◽  
Author(s):  
Ryszard Bartnik ◽  
Zbigniew Buryn ◽  
Anna Hnydiuk-Stefan ◽  
Waldemar Skomudek ◽  
Aleksandra Otawa
Keyword(s):  
Energy Efficiency ◽  
Low Temperature ◽  
Gas Turbine ◽  
Electric Motor ◽  
Schematic Diagram ◽  
Rotating Shaft ◽  
Gas Engine ◽  
Specific Cost ◽  
Gas System ◽  
Heat Regeneration

This paper presents the results of analysis of energy and economic efficiency of the hierarchical gas-gas engine, with a note that a trigeneration system was analyzed, in which the production of electricity, heat and cold are combined. This solution significantly increases the energy efficiency of the gas and gas system compared to a system without cold production. The analysis includes a system comprising a compressor chiller which is driven by an electric motor in the system, as well as a system applying the mechanical work that is carried out via a rotating shaft of rotor-based machines, i.e., a gas turbine and a turboexpander. The comfort of the regulation of the refrigerating power rather promotes the use of a solution including an electric motor. Analysis contains also a schematic diagram of the system with a absorption chiller, which is driven by low-temperature enthalpy of exhaust gases extracted from a hierarchical gas-gas engine. Application of turboexpander with heat regeneration in the trigeneration system is also analyzed. Based on the multi-variant economic and thermodynamic calculations, the most favorable system variant was determined using, among others, the specific cost of cold production.

Performance Study of DC Compressor for Automotive Air Conditioning System

2012 ◽  
Vol 614-615 ◽  
pp. 674-677
Author(s):  
Nasution Henry ◽  
M.H.Z. Yamani ◽  
K. Sumeru
Keyword(s):  
Energy Efficiency ◽  
Direct Current ◽  
Electric Motor ◽  
Air Conditioning ◽  
Engine Speed ◽  
Cooling Capacity ◽  
Performance Study ◽  
Air Conditioning System ◽  
Automotive Air Conditioning ◽  
Automotive Air Conditioning System

The automotive air conditioning compressor (AAC) is belt-driven by the engine. The compressor speed is directly proportional to the engine speed. Therefore, the cooling capacity will vary as the engine speed changes. To meet the air conditioning (AC) demand, the compressor continually cycles on and off. In the research, the compressor of the AAC is driven by an electric motor which in turn is operated by electrical battery (12 volt). The use of direct current compressor (DCC) is seen as a solution of the existing system. Using the proposed system, DCC gets significant improvements in energy efficiency. Compared with AAC system, the energy conservation effect is about 77.5% to 86.35%.

scholarly journals Feasibility of a Clutchless Dual-Shaft Hybrid Transmission System for Performance Applications

2016 ◽  
Author(s):  
Sahil Shah ◽  
Victor Prost ◽  
Zachary Eubanks ◽  
Paige Reiter ◽  
Daria Bondarchuk ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Electric Motor ◽  
Combustion Engine ◽  
Regenerative Braking ◽  
Electric Transmission ◽  
High Acceleration ◽  
Viscous Losses ◽  
Hybrid Transmission ◽  
Reverse Gear ◽  
Viable Method

A novel hybrid-electric transmission concept was sought that yields higher acceleration and smoother gear-shifts compared to existing dual-clutch systems while improving the energy efficiency of the vehicle. After evaluating a range of strategies, the elimination of the clutch was identified as a viable method for reducing the vehicle’s effective inertia and viscous losses. The proposed architecture implements a single electric motor, and two separate shafts for odd and even gears, to replace the functions of a clutch. High acceleration rates can be achieved using the electric motor when launching the vehicle. Furthermore, the torque from the electric motor (EM) and internal combustion engine (ICE) can be simultaneously delivered through the two shafts to sustain this high acceleration. A 0 to 100 km/hr time of 3.18 s was simulated for a 1600 kg vehicle using a 180 kW EM and 425 kW ICE. In addition, the EM can be used to match the speeds of consecutive gears on the two shafts to reduce jerk while shifting. Shift durations were found to vary between 0.2 and 0.9 s using this strategy. Other benefits include regenerative braking and the removal of the reverse gear since the EM can rotate in either direction. It was also found that the vehicle can be operated on only electric power in urban settings — represented by the NEDC driving cycle — if the battery is recharged through regenerative braking, and by the ICE the vehicle is stopped.

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