scholarly journals High-Voltage Electric Field-Assisted Thawing of Frozen Tofu: Effect of Process Parameters and Electrode Configuration

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Changjiang Ding ◽  
Jiabao Ni ◽  
Zhiqing Song ◽  
Zhiwei Gao ◽  
Shilong Deng ◽  
...  
Keyword(s):  
Electric Field ◽  
Process Parameters ◽  
High Voltage ◽  
Loss Rate ◽  
Major Effect ◽  
Electrode Configuration ◽  
Thawing Process ◽  
Great Relevance ◽  
Electric Parameters ◽  
Thawing Rate

Applying high-voltage electric field (HVEF) to some food materials has been shown to increase the thawing rate. To investigate the effect of process parameters and electrode configuration in high-voltage electric field system, we took the frozen tofu as the research object and investigated the influence of the different voltages, electrode configuration, and electrode distances on thawing process. The thawing time, center temperatures, and loss rate of samples were measured. The results showed that the thawing time of frozen tofu decreases with the increase of voltage and the thawing time has a great relevance with configuration and distance of electrodes. The electric parameters have a major effect on thawing loss and thawing time when center temperatures of frozen tofu are from −2°C to 0°C. This work provides clues and experimental basis for the further application of high-voltage electric field thawing technology.

scholarly journals Effects of High-Voltage Electric Field Process Parameters on the Water-Holding Capacity of Frozen Beef during Thawing Process

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Yaming Zhang ◽  
Changjiang Ding ◽  
Jiabao Ni ◽  
Zhiqing Song ◽  
Rui Zhao
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Quality Parameters ◽  
Electrode System ◽  
Water Holding Capacity ◽  
Plate Electrode ◽  
Thawing Process ◽  
Single Factor Analysis ◽  
Thawing Rate ◽  
Water Holding

In order to investigate the thawing time and water-holding capacity under high-voltage electric field (HVEF), we studied the thawing experiments of frozen beef in a multiple needles-to-plate electrode system. The electric field, thawing characteristics, and quality parameters during the thawing process were measured. The results showed that compared with the control, the thawing time of beef under HVEF was significantly shortened, the thawing rate increased significantly, the drip loss decreased, and the centrifugal loss increased during the thawing process. By the response surface analysis and single-factor analysis of variance, the best thawing conditions for each thawing parameter were determined. It provides a theoretical basis and practical guidance for understanding the characteristic parameters of the high-voltage electric field thawing technology.

scholarly journals Analysis of Electric Field and Current Density for Different Electrode Configuration of XLPE Insulation

2018 ◽  
Vol 7 (3.36) ◽  
pp. 127 ◽  
Author(s):  
Nishanthi Sunthrasakaran ◽  
Nor Akmal Mohd Jamail ◽  
Qamarul Ezani Kamarudin ◽  
Sujeetha Gunabalan
Keyword(s):  
Electric Field ◽  
Power System ◽  
Field Distribution ◽  
High Voltage ◽  
Current Density ◽  
Electric Field Distribution ◽  
Electrical Power ◽  
High Electric Field ◽  
Electrode Configuration ◽  
Maximum Electric Field

The most important aspect influencing the circumstance and characteristics of electrical discharges is the distribution of electric field in the gap of electrodes. The study of discharge performance requires details on the variation of maximum electric field around the electrode. In electrical power system, the insulation of high voltage power system usually subjected with high electric field. The high electric field causes the degradation performance of insulation and electrical breakdown start to occur. Generally, the standard sphere gaps widely used for protective device in electrical power equipment. This project is study about the electric field distribution and current density for different electrode configuration with XLPE barrier. Hence, the different electrode configuration influences the electric field distribution. This project mainly involves the simulation in order to evaluate the maximum electric field for different electrode configuration. Finite Element Method (FEM) software has been used in this project to perform the simulation. This project also discusses the breakdown characteristics of the XLPE. The accurate evaluation of electric field distribution and maximum electric field is an essential for the determination of discharge behavior of high voltage apparatus and components. The degree of uniformity is very low for pointed rod-plane when compared to other two electrode configurations. The non- uniform electric distribution creates electrical stress within the surface of dielectric barrier. As a conclusion, when the gap distance between the electrodes increase the electric field decrease.  

Study on High Voltage Electrostatic Field Thawing Technology of Fish

2014 ◽  
Vol 651-653 ◽  
pp. 344-347 ◽  
Author(s):  
Ya Xiang Bai ◽  
Yuan Huo ◽  
Bin Kang
Keyword(s):  
High Voltage ◽  
Electrostatic Field ◽  
Cooking Loss ◽  
Total Volatile ◽  
Total Volatile Basic Nitrogen ◽  
Basic Nitrogen ◽  
Thawing Process ◽  
Thawing Rate

In order to improve the thawing qualities of fish, a thawing process of high voltage electrostatic field (HVEF) was studied. It was compared with nature thawing on the basis of thawing rate and the fish’s qualities index such as pH, thawing loss, cooking loss and total volatile basic nitrogen (TVB-N). The results showed that the high voltage electrostatic field can improve the thawing rate of fish significantly. Compared with nature thawing, the thawed fish under t HVEF had better qualities such as lower thawing loss and total volatile basic nitrogen (TVB-N). HVEF thawing has advantages, which can be used as a substitute method.

scholarly journals The Thawing Characteristic of Frozen Tofu under High-Voltage Alternating Electric Field

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Shilong Deng ◽  
Zhiwei Gao ◽  
Jing Xu ◽  
Guoqing Wang ◽  
Yu Bai ◽  
...  
Keyword(s):  
Electric Field ◽  
Mathematical Models ◽  
High Voltage ◽  
Specific Energy Consumption ◽  
Mean Square ◽  
Effective Strategy ◽  
Field System ◽  
Alternating Electric Field ◽  
Thawing Rate ◽  
Quadratic Models

To systematically and comprehensively investigate the high voltage alternating electric field (HVAEF) thawing processing, we investigated the high-voltage electric field thawing characteristic of the frozen tofu at different voltages for alternating current (AC). The thawing time, thawing loss of frozen tofu, and specific energy consumption (SEC) of HVEF system were measured. Seven different mathematical models were then compared to simulate thawing time curves based on root mean square error, reduced mean square of deviation, and modeling efficiency. The results showed that the thawing rate of frozen tofu was notably greater in the high-voltage electric field system when compared to control. Both Linear and Quadratic models were the best mathematical models. Therefore, this work presents a facile and effective strategy for experimentally and theoretically determining the HVAEF thawing properties of frozen tofu.

PEMANFAATAN RADIASI ENERGI TEGANGAN 150 KV UNTUK LAMPU LED PENERANGAN JALAN

Jurnal Teknik ◽  
2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Mauludi Manfaluthy
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
High Voltage ◽  
Low Frequency ◽  
Energy Utilization ◽  
World Health ◽  
Electromagnetic Signals ◽  
Health Organization ◽  
The Magnetic Field ◽  
Low Frequency Waves

WHO (World Health Organization) concludes that not much effect is caused by electric field up to 20 kV / m in humans. WHO standard also mentions that humans will not be affected by the magnetic field under  100 micro tesla and that the electric field will affect the human body with a maximum standard of 5,000 volts per meter. In this study did not discuss about the effect of high voltage radiation SUTT (High Voltage Air Channel) with human health. The research will focus on energy utilization of SUTT radiation. The combination of electric field and magnetic field on SUTT (70-150KV) can generate electromagnetic (EM) and radiation waves, which are expected to be converted to turn on street lights around the location of high voltage areas or into other forms. The design of this prototype works like an antenna in general that captures electromagnetic signals and converts them into AC waves. With a capacitor that can store the potential energy of AC and Schottky diode waves created specifically for low frequency waves, make the current into one direction (DC). From the research results obtained the current generated from the radiation is very small even though the voltage is big enough.Keywords : Radiance Energy, Joule Thief, and  LED Module.

Instrument for measuring the electric field vector of high-voltage equipment

1983 ◽  
Vol 26 (1) ◽  
pp. 49-50
Author(s):  
I. P. Klimashevskii ◽  
B. L. Kondrat'ev ◽  
V. A. Poletaev ◽  
V. M. Yurkevich
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Field Vector ◽  
Electric Field Vector
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