scholarly journals Design and Development of Light Weight Stirling Engine by using Compressor

2021 ◽  
Vol 9 (VI) ◽  
pp. 1370-1376
Author(s):  
Mr. Pratik Prakash Chavan
Keyword(s):  
Nuclear Power ◽  
Light Weight ◽  
Cyclic Pressure ◽  
Heat Recuperation ◽  
Power Yield ◽  
Mechanical Transformation ◽  
Heat Expansion ◽  
Energy Application ◽  
Efficient Power ◽  
Alpha Type

From the nineteenth century, the mechanical transformation needs an incredible nuclear power creation. The pre-owned advances have a few specialized issues making hurt people and harming materials. There are numerous ways by which altering existing methods will assist with diminishing the uses. The work proposes the best approach to assemble and use the minimal expense Stirling motor for the efficient power energy application. A protected outside burning motor was the creation proposed by Robert Stirling to save human existence and materials. This motor is imagined for working with various temperatures without start inside by squander heat recuperation. It is worked by cyclic pressure and extension measure. The plan interaction includes the plan of chambers, heat expansion, dismissal, proficiency, power yield and some more. This motor is agreeable for individuals since it is very, less loud and minimized in size and alpha motor has more noteworthy proportion contrasted with different sorts. It is elective fuel hotspot for other fuel. This is efficient power energy application. This present’s development and execution trial of an alpha-type Stirling motor.

Efficient Power Generation From Large 750°C Heat Sources: Application to Coal-Fired and Nuclear Power Stations

1980 ◽  
Author(s):  
Z. P. Tilliette ◽  
B. Pierre
Keyword(s):  
Power Generation ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Energy ◽  
Inlet Temperature ◽  
Heat Sources ◽  
Turbine Inlet Temperature ◽  
Power Stations ◽  
Efficient Power ◽  
Steam Cycle

Considering the concern about a more efficient, rational use of heat sources, and a greater location flexibility of power plants owing to cooling capability, closed gas cycles can offer new solutions for fossil or nuclear energy. An efficient heat conversion into power is obtained by the combination of a main non-intercooled helium cycle with a flexible, superheated, low-pressure bottoming steam cycle. Emphasis is placed on the matching of the two cycles and, for that, a recuperator bypass arrangement is used. The operation of the main gas turbocompressor does not depend upon the operation of the small steam cycle. Results are presented for a conservative turbine inlet temperature of 750 C. Applications are made for a coal-fired power plant and for a nuclear GT-HTGR. Overall net plant efficiencies of 39 and 46 percent, respectively, are projected.

Integration of a CaO-Based Thermal Storage System in an IGCC Plant With Carbon Capture

2014 ◽  
Author(s):  
Annelies Vandersickel ◽  
Alexander Mitsos ◽  
Randall P. Field
Keyword(s):  
Energy Storage ◽  
Carbon Capture ◽  
Storage System ◽  
Internal Heat ◽  
Energy Storage System ◽  
Plant Design ◽  
Load Range ◽  
Integration Strategy ◽  
Heat Recuperation ◽  
Efficient Power

Using pre-combustion CO2-capture, IGCC plants show significant potential for efficient power generation with carbon capture. The gasification and gas processing steps however have multiple temperature and flow constraints which severely limit the flexibility of IGCC plants to meet the dynamic demands of the current grid. To address this issue, a CaO-based energy storage system has recently been proposed to substantially increase the load range of a base IGCC plant without cycling the gasifier island. In this work, further storage configurations have been assessed, addressing the inefficiencies identified in previous work. In particular, the following cases have been investigated: directly fired calciners with varying make-up flow rate to minimize the purge stream energy loss, directly fired calciners with improved heat integration to reduce the calciner syngas demand and an indirectly fired calciner to minimize the ASU penalty. Additionally, an alternative storage integration strategy after the Selexol unit has been compared both with respect to its performance and its impact on the base IGCC plant design and operation. To this end, process simulation was undertaken in Aspen Plus™. As demonstrated, the CaO based energy storage system can be effectively used to modulate the IGCC net power output by ±20–25%, while maintaining the capture capacity of 90% of the CO2-emissions. Improvement of the particle reactivity and the internal heat recuperation were found to impact the round-trip efficiency the most.

Lapping Machining of High-Speed and High-Precision Ceramic Bearing Balls

2005 ◽  
Vol 291-292 ◽  
pp. 325-330 ◽  
Author(s):  
Yu Hou Wu ◽  
Song Hua Li ◽  
Ke Zhang
Keyword(s):  
High Precision ◽  
High Speed ◽  
High Efficiency ◽  
Research Result ◽  
High Hardness ◽  
Light Weight ◽  
Abrasive Resistance ◽  
Ceramic Bearing ◽  
Mechanics Characteristic ◽  
Heat Expansion

In resent years, ceramic balls have been applied into precision bearings and other parts far and wide because of its advantages in light weight, high hardness, abrasive resistance, high-temperature resistance, corrosion resistance, little heat expansion coefficient and so on. The high-precision ceramic balls are machined by lapping usually, and the method of lapping has an important influence on the machining precision and efficiency of ceramic balls. In order to improve the precision and efficiency of ceramic ball machining, in the paper, a new cone lapping method is researched by the lapping experiment. The research result shows that the cone method is the optimal lapping method with high precision, high efficiency and the very simple machine. Furthermore, the mechanics characteristic of the cone lapping method have been analyzed and summarized, which will provide the basic principle and theoretical basis for the choice of primary geometry and mechanics parameter in the process of ceramic balls lapping.

scholarly journals Increase of Manoeuvrability of Nuclear Power Units by the Production of Magnegas During the Decline of Electro-Consumption

2019 ◽  
pp. 68-74
Author(s):  
V. A. Dubkosky ◽  
A. V. Korolov ◽  
Y. O. Komarova
Keyword(s):  
Power System ◽  
Gas Turbine ◽  
Nuclear Power ◽  
Power Plants ◽  
Turbine Unit ◽  
Gas Turbine Unit ◽  
Peak Loads ◽  
Power Yield ◽  
The Cost ◽  
Turbine Installation

Nuclear power plants successfully competitive today with other types of generation of electric power yield to them on the indexes of manoeuvrability, as they were initially projected for work in the base modes. Today the grid of Ukraine sets the problem before NPP in the obligatory participating in adjusting of power. In the article the different methods of participation of NPP are considered in adjusting of power of power system: receipt of синтез-газа with the use of warmth of HTGR, different ways of manoeuvring of power of reactors of VVER – 1000, using for the accumulation of warmth the effects of absorption and desorption of ammonia in water, - chart of WARM; charts of distant теплоснабжения from NPP are WATT (ammonia water transport of warmth). The calculation comparing of efficiency of different charts of manoeuvring of power of power system and comparison of them is executed to магнегаз-технологией. It is shown that the use for the aims of coverage of peak-loads in modern grids with the use of options of magnegas-technology most effectively and expediently. The efficiency of such installations was 42%. The cost of producing magnegas for a gas turbine installation is 3441483 UAH, when it comes from the sale of electricity generated at a gas turbine unit due to the combustion of magnegas 498319110 UAH.

The Effects of Ion Implantation on the Surface Features of Inconel 600

1985 ◽  
Vol 43 ◽  
pp. 288-289
Author(s):  
John D. Rubio
Keyword(s):  
Grain Boundary ◽  
Ion Implantation ◽  
Nuclear Power ◽  
Power Plants ◽  
Surface Region ◽  
Selective Dissolution ◽  
Boundary Region ◽  
Near Surface ◽  
Inconel 600 ◽  
Steam Generator Tubing

The degradation of steam generator tubing at nuclear power plants has become an important problem for the electric utilities generating nuclear power. The material used for the tubing, Inconel 600, has been found to be succeptible to intergranular attack (IGA). IGA is the selective dissolution of material along its grain boundaries. The author believes that the sensitivity of Inconel 600 to IGA can be minimized by homogenizing the near-surface region using ion implantation. The collisions between the implanted ions and the atoms in the grain boundary region would displace the atoms and thus effectively smear the grain boundary.To determine the validity of this hypothesis, an Inconel 600 sample was implanted with 100kV N2+ ions to a dose of 1x1016 ions/cm2 and electrolytically etched in a 5% Nital solution at 5V for 20 seconds. The etched sample was then examined using a JEOL JSM25S scanning electron microscope.

Microstructure of an extruded rapidly solidified Al-8Fe-2Mo alloy

1986 ◽  
Vol 44 ◽  
pp. 548-549
Author(s):  
W. T. Donlon ◽  
J. E. Allison ◽  
S. Shinozaki
Keyword(s):  
Electron Microscopy ◽  
Automotive Industry ◽  
Fuel Economy ◽  
High Strength ◽  
Al Alloys ◽  
Light Weight ◽  
Thin Sections ◽  
Strength And Durability ◽  
Rapidly Solidified ◽  
Whitney Aircraft

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.

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