scholarly journals Design of High Power Regenerative Battery Discharger System for Nuclear Power Plant

2021 ◽  
Author(s):  
Kudiyarasan Swamynathan ◽  
N. Sthalasayanam ◽  
M. Sridevi
Keyword(s):  
High Power ◽  
Nuclear Power ◽  
High Efficiency ◽  
Current System ◽  
New Technology ◽  
Load Cycle ◽  
Nuclear Power Reactor ◽  
Nuclear Plants ◽  
Interleaved Boost Converter ◽  
Grid Connected Inverter

In a Nuclear Power reactor, safety loads are backed by standby battery system. The healthiness of the battery is very essential requirement and prominent attention is given to availability and reliability of battery supply in nuclear plants. Hence regular monitoring and testing the performance of the battery is a prime requirement. The capacity and load cycle discharge testing of the battery is done annually and the current system employed is to discharge the battery current through resistor banks, which results in unusable power consumption and is uneconomical. The growing trend in power electronics field has given the new technology of regenerating the dissipated power to grid. This paper proposes a high power electronic regenerative technology with high efficiency, low harmonics to pump the dc power to the grid. Though, it is available at lower rating in industry, the paper proposes a high power regenerative discharge system. The topology selected is interleaved boost converter interfaced to a three phase grid connected inverter. The challenges involved are high power operation, steep current discharges with a minimal interference to the normal plant operation power supplies during the regeneration. This paper also presents the system design and simulation results.

Versatile Heat Source for Nuclear Gas Turbine and Hydrogen Production Facility

2002 ◽  
Author(s):  
Colin F. McDonald
Keyword(s):  
High Temperature ◽  
Hydrogen Production ◽  
Heat Source ◽  
Gas Turbine ◽  
Nuclear Power ◽  
Power Plants ◽  
High Efficiency ◽  
Greenhouse Gas Emission ◽  
Electrical Power ◽  
Nuclear Plants

Recent media articles about nuclear power renaissance are encouraging, but this controversial topic is far from being embraced by major industrial powers. The fact is, that within the next two to three decades or so most of the first generation US nuclear power plants, currently producing about 20 percent of the nation’s electrical power, will be near the end of their design lives. In addition to providing needed power, a major argument put forward for the introduction of next generation smaller and safer nuclear plants relates to the growing concern about greenhouse gas emission and global warming. However, overcoming public and institutional resistance to nuclear power remains a formidable endeavor, and in reality the introduction of new plants in sufficient numbers to significantly impact the market will not be realized for several decades. Clearly vision is needed to define the requirements for new nuclear plants that will meet the needs of consumers by say the middle of the 21st century. Market forces will mandate changes in the energy supply sector, and to be in concert with environmental concerns new nuclear plants must have operational flexibility. In addition to economical electrical power, energy needs in the future could include hydrogen production in slgnificant quantity (for fuel cells in the transportation and power sectors) and fresh water by desalination for urban, industrial and agricultural users. The High Temperature Reactor (HTR) has the capability to meet these projected needs. With an established technology base, and successful plant operation in Germany, the helium cooled pebble bed reactor (PBR) must be regarded as a leading second generation nuclear plant. Operational versatility by virtue of its high temperature capability is assured, and high availability can be realized with its on-line refueling approach. While the multipurpose HTR may be several decades away from playing a significant rote in the commercial market place, this paper emphasizes the need for technical planning today to establish a nuclear heat source adaptable to both a high efficiency helium timed cycle gas turbine and large scale hydrogen production facilities, thus extending the role of nuclear power beyond just the supply of electrical power.

SANICRO 71

Alloy Digest ◽  
1965 ◽  
Vol 14 (12) ◽  
Keyword(s):  
Nuclear Power ◽  
Elevated Temperatures ◽  
Power Reactor ◽  
Base Alloy ◽  
Heat Treating ◽  
Good Resistance ◽  
Nuclear Power Reactor ◽  
Temperature Performance ◽  
Resistance To Stress ◽  
Nickel Base

Abstract Sanicro 71 is a nickel-base alloy having good resistance to stress-corrosion, oxidation and creep at elevated temperatures. It is recommended for nuclear power reactor heat exchanger tubes, aircraft turbojet engines and for equipment in the textile, plastic, and chemical industries. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-108. Producer or source: Sandvik.

A review of high-power magnetoplasmodynamic electric propulsion designs and studies of RSC Energia

2020 ◽  
pp. 112-133
Author(s):  
Victor V. SINYAVSKIY
Keyword(s):  
Service Life ◽  
Electric Power ◽  
High Power ◽  
Electric Propulsion ◽  
Nuclear Power ◽  
Materials Science ◽  
Low Voltage ◽  
Power Input ◽  
Design Bureau ◽  
Rocket Propulsion

At the initiative of S.P.Korolev, in 1959, Special Design Bureau No.1 (now RSC Energia) established the High-temperature Power Engineering and Electric Propulsion Center which was tasked with development of nuclear electric propulsion for heavy interplanetary vehicles. Selected as the source of electric power was a nuclear power unit based on a thermionic converter reactor, and selected as the engine was a stationary low-voltage magnetoplasmodynamic (MPD) high-power (0.5–1.0 MW) thruster which had thousands of hours of service life. The paper presents the results of extensive efforts in research, development, design, materials science experiments, and tests on the MPD-thruster, including the results of development and 500-hours life tests of an MPD-thruster with a 500-600 kW electric power input that used lithium propellant. The world’s first lithium 17 kW MPD-thruster was built and successfully tested in space. The paper points out that to this day nobody has surpassed the then achievements of RSC Energia neither in thruster output during long steady-state operation, nor in performance and service life. Key words: Martian expeditionary vehicle, nuclear electric rocket propulsion system, electric rocket thruster, magnetoplasmodynamic thruster, lithium, cathode, anode, barium, electric propulsion tests in space.

Progress in high-power high-efficiency VCSEL arrays

2009 ◽  
Author(s):  
Jean-Francois Seurin ◽  
Guoyang Xu ◽  
Viktor Khalfin ◽  
Alexander Miglo ◽  
James D. Wynn ◽  
...  
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Vcsel Arrays

scholarly journals Near-field thermophotovoltaics for efficient heat to electricity conversion at high power density

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Rohith Mittapally ◽  
Byungjun Lee ◽  
Linxiao Zhu ◽  
Amin Reihani ◽  
Ju Won Lim ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
High Efficiency ◽  
Near Field ◽  
Electrical Power ◽  
Photovoltaic Cells ◽  
High Power Density ◽  
Pv Cell ◽  
Electrical Power Output ◽  
Power Densities

AbstractThermophotovoltaic approaches that take advantage of near-field evanescent modes are being actively explored due to their potential for high-power density and high-efficiency energy conversion. However, progress towards functional near-field thermophotovoltaic devices has been limited by challenges in creating thermally robust planar emitters and photovoltaic cells designed for near-field thermal radiation. Here, we demonstrate record power densities of ~5 kW/m2 at an efficiency of 6.8%, where the efficiency of the system is defined as the ratio of the electrical power output of the PV cell to the radiative heat transfer from the emitter to the PV cell. This was accomplished by developing novel emitter devices that can sustain temperatures as high as 1270 K and positioning them into the near-field (<100 nm) of custom-fabricated InGaAs-based thin film photovoltaic cells. In addition to demonstrating efficient heat-to-electricity conversion at high power density, we report the performance of thermophotovoltaic devices across a range of emitter temperatures (~800 K–1270 K) and gap sizes (70 nm–7 µm). The methods and insights achieved in this work represent a critical step towards understanding the fundamental principles of harvesting thermal energy in the near-field.

Sign in / Sign up

Export Citation Format

Share Document