scholarly journals Design and Performance Analysis of Multi-Spring Maker

2019 ◽  
Vol 9 (1) ◽  
pp. 2782-2784
Keyword(s):  
Performance Analysis ◽  
World Wide ◽  
Outer Diameter ◽  
Mechanical Device ◽  
Compression Spring ◽  
Wide Range ◽  
Tension And Compression ◽  
Inner Diameter ◽  
Compression Springs ◽  
And Performance

In this industrial world, wide range of power operated machines is used for the production of springs. But this is the simple mechanism arrangement for the production of torsion and compression springs. This machine is operated by manual method. This machine can produce both the tension and compression springs of different Diameter and different length. It can make a spring with the help of the shaft. The wire which is used for producing the spring moves around the shaft to make a suitable spring. This self-movement is achieved by the keyway of the shaft. A handle is used to operate the rolling machine manually. The outer Diameter of the shaft is the inner Diameter of the spring. The torsion and compression spring is a mechanical device which is used to store energy and release it when needed.

Influence of fully submerged permanent magnets in the evaluation of heat transfer and performance analysis of single slope glass solar still

2021 ◽  
pp. 095765092110310
Author(s):  
Ajay Kumar Kaviti ◽  
Akkala Siva Ram ◽  
Amit Kumar Thakur
Keyword(s):  
Heat Transfer ◽  
Permanent Magnets ◽  
Outer Diameter ◽  
Solar Still ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients ◽  
Inner Diameter ◽  
Evaporative Heat Transfer ◽  
And Performance ◽  
Depth Water

In this experimental study, permanent magnets with three different sizes (M-1: 32 mm inner diameter, 70 mm outer diameter and 15 mm thick, M-2: 25 mm inner diameter, 60 mm outer diameter and 10 mm thick, M-3: 22 mm inner diameter, 45 mm outer diameter and 9 mm thick) are fully submerged in the single-slope glass solar still. The performance of magnetic solar stills (MSS) with three different sizes at 2 cm depth water to ensure that magnets are fully submerged is compared with conventional solar still (CSS) at the location 17.3850°N, 78.4867°E. Tiwari model is adapted to calculate the heat transfer coefficients (HTC), internal and exergy efficiencies. MSS with M-1, M-2 and M-3 significantly enhanced the convective, radiative, and evaporative heat transfer rate for the 2 cm depth of water. This is due to the desired magnetic treatment of water, which reduces the surface tension and increases the hydrogen bonds. The MSS's total internal HTC, instantaneous efficiencies led CSS by 25.52%, 28.8%, respectively, with M-1. Having various magnetic fields due to different magnets sizes increases MSS's exergetic efficiency by 33.61% with M-1, 33.76% with M-2, and 42.25% with M-3. Cumulative yield output for MSS with M-1, M-2, and M-3 is 21.66%, 17.64%, 15.78% higher than CSS. The use of permanent magnets of different sizes in the MSS is a viable, economical and straight forward technique to enhance productivity.

scholarly journals Multifield Coupling Model and Performance Analysis of a Hydrostatic Mechanical Seal

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5159
Author(s):  
Guiyue Kou ◽  
Xinghu Li ◽  
Yan Wang ◽  
Chunsen Tan ◽  
Kanran Zhou ◽  
...  
Keyword(s):  
Fluid Pressure ◽  
Coupling Model ◽  
Outer Diameter ◽  
Mechanical Seal ◽  
Design And Optimization ◽  
Seal Design ◽  
Mechanical Deformations ◽  
Deformation State ◽  
Inner Diameter ◽  
And Performance

A two-dimensional axisymmetric thermal-fluid-solid coupled mathematical model of a contact mechanical seal is established. The finite difference method is used to solve the control equations for the fluid pressure and temperature of the seal end face, and the finite element method is used to determine the thermal deformation state of the seal. The seal’s performance at different working speeds was studied and verified by experiments. The results show that under the combined actions of thermal and mechanical deformations, the seal end face forms a convergent leakage gap from the outer diameter to the inner diameter. The minimum film thickness is observed on the inner diameter side of the seal end face, and the highest end face temperature coincides with this location. With increasing working speed, the contact force at the inner diameter side increases, the temperature difference between the inner diameter and the outer diameter of the end face increases, and the leakage rate correspondingly increases. The numerical simulation results are in good agreement with the experimental results. The model and calculation method can be applied to other forms of mechanical seal design and optimization.

scholarly journals Advanced Models and Algorithms for Self-Similar IP Network Traffic Simulation and Performance Analysis

2010 ◽  
Vol 61 (6) ◽  
pp. 341-349 ◽  
Author(s):  
Dimitar Radev ◽  
Izabella Lokshina
Keyword(s):  
Performance Analysis ◽  
Network Traffic ◽  
Traffic Simulation ◽  
Traffic Data ◽  
Fractal Models ◽  
Wide Range ◽  
Ip Network ◽  
Self Similar ◽  
Markov Modulated ◽  
And Performance

Advanced Models and Algorithms for Self-Similar IP Network Traffic Simulation and Performance Analysis The paper examines self-similar (or fractal) properties of real communication network traffic data over a wide range of time scales. These self-similar properties are very different from the properties of traditional models based on Poisson and Markov-modulated Poisson processes. Advanced fractal models of sequentional generators and fixed-length sequence generators, and efficient algorithms that are used to simulate self-similar behavior of IP network traffic data are developed and applied. Numerical examples are provided; and simulation results are obtained and analyzed.

Design of a Functionally Binary Pinned-Pinned Segment for Use as a Tension-Compression Spring in Compliant Micro Mechanisms

2002 ◽  
Author(s):  
Jonathan W. Wittwer ◽  
Larry L. Howell
Keyword(s):  
Rigid Body ◽  
Moment Method ◽  
Maximum Error ◽  
Micro Scale ◽  
Linear Tension ◽  
Body Model ◽  
Compression Spring ◽  
Rigid Body Model ◽  
Tension And Compression ◽  
Compression Springs

As mechanisms approach the micro scale, manufacture and assembly of linear coil springs becomes nearly impossible. For this reason, compliant functionally binary pinned-pinned segments are frequently used in place of them. A new pseudo-rigid-body model (PRBM) is presented for circular functionally binary pinned-pinned (FBPP) segments that undergo large, nonlinear deflections for both tension and compression. A new method of evaluating the maximum moment in the beam is presented, called the focal moment method, which significantly increases the accuracy of the force for a given displacement. This paper also shows how some FBPP segments can be modeled as simple linear tension/compression springs. The deflection limits for a given maximum error can be determined analytically, thereby making it possible to use optimization algorithms in the design of these springs. The effect of the size of the rigid pin joints is also discussed.

Measurements of Corona Discharge in Non-Uniform Field Freon GAP

2014 ◽  
Vol 7 (4) ◽  
pp. 47-61
Author(s):  
A. S. Hasaani ◽  
Hassan J. Mohammed
Keyword(s):  
Corona Discharge ◽  
Pressure Range ◽  
Outer Diameter ◽  
Uniform Field ◽  
Design Considerations ◽  
Wide Range ◽  
Onset Voltage ◽  
Inner Diameter ◽  
Gap Spacing ◽  
High Degree

Corona Discharge have been recorded in pin-to pin electrode at gas pressure gaps with high degree of non-uniformity electric field. For a wide range of experimental applicability the pin to pin electrode was used over pressure range from 1bar to 3bar and gap spacing from 0 to 5mm.High –pressure dc corona discharge experiments have been carried out in a 16cm long glass chamber with an inner diameter and outer diameter are 16.8cm, and 19cm respectively. Corona onset voltage and breakdown voltages were reached. The design considerations of the setup allow to use pin to pin electrode type geometries. Electronegative gases such as air, Freon (R22), were separately used for low temperature corona generation. The experiments have been carried out under ambient Laboratory conditions of temperature (19-24 oC), and humidity. The present experiment were studies the relation between the (V-P) and (V-d), on other hand, we study the relation between the current and applied voltage.

Design and performance analysis of solar-coal-fired complementary power system based on the S-CO2 Brayton cycle

2021 ◽  
pp. 1-12
Author(s):  
Yunlong Zhou ◽  
Jiaxin Bao ◽  
Mei Yang
Keyword(s):  
Performance Analysis ◽  
Solar Energy ◽  
Mode Conversion ◽  
Operating Mode ◽  
Brayton Cycle ◽  
Operation Performance ◽  
Wide Range ◽  
And Performance ◽  
Solar Field ◽  
Work Done

Abstract To make solar energy conversion more effective and enable effective complementary utilization of multiple energy sources, two types of solar-coal-fired complementary power (SCCP) systems, which use the supercritical CO2 (S-CO2) Brayton cycle, are investigated and their layouts improved. In addition, a thermodynamic performance analysis is carried out. The results show that, as the amount of work done by the solar energy module increases, the coal saving rate increases linearly and proportionally in both SCCP systems. Also, the supplementary electric power generated by the solar field increases. The two improved layouts increase the net efficiency of the SCCP systems significantly (SCCP1: from 43.60% to 47.65, SCCP2: from 43.60% to 47.67%). More specifically, the net efficiency of the improved layout for SCCP2 increases faster than that for SCCP1 (with its improved layout), when the second split ratio (SR2) exceeds 0.031. When the net efficiency remains unchanged, the SR2 for SCCP2 improved layout has a wide range. Furthermore, both the operation performance and operating-mode conversion of the basic system are studied for varying sunlight-conditions. The simulation results are consistent with the expectations, which underlines the development potential of the system to a certain extent.

TINGKAT KEPUASAN PESERTA LELANG TERHADAP PELAYANAN TEMPAT PELELANGAN IKAN (TPI) MORODEMAK

2019 ◽  
Vol 13 (2) ◽  
pp. 122-130
Author(s):  
Dian ayunita Nugraheni nurmala Dewi
Keyword(s):  
Performance Analysis ◽  
Service Quality ◽  
Gap Analysis ◽  
Quality Measurement ◽  
Service Satisfaction ◽  
Importance Value ◽  
Auction House ◽  
Participant Satisfaction ◽  
And Performance ◽  
Descriptive Method

Objectives of this study were analyze fish auction participant satisfaction to auction services in TPI Morodemak, analyze attributes effect, services that fit to service quality measurement, and analyzed fish auction participants perception to performance and importance for fish auction house Morodemak services. Used descriptive method and purposive sampling with 49 respondents consists of commercial fishmongers, traditional fishmongers, purse seine owners, and boat lift net owners as fish auction participant. Satisfication measurement used Customer Satisfication Index (CSI), Importance and Performance Analysis (IPA) and gap analysis. Results from this study were value CSI 20% (0.2) indicate the auction participants dissatisfied with the services provided, IPA show there are four attributes should be develop, two elements have not been completed based on measurement requirements of service satisfaction, gap value average -0.05 means the auction participants were not satisfied with the performance of TPI services because the performance value was lower than the importance value.

TANGGAPAN WAJIB PAJAK TERHADAP KUALITAS PELAYANAN DILIHAT DARI TINGKAT KEPENTINGAN DAN KINERJA PADA KANTOR PELAYANAN PAJAK KOTA BOGOR

2018 ◽  
Vol 2 (01) ◽  
pp. 14
Author(s):  
Eddy Supardi
Keyword(s):  
Performance Analysis ◽  
Service Quality ◽  
Descriptive Analysis ◽  
Good Work ◽  
Satisfaction Level ◽  
Quality Service ◽  
Analysis Method ◽  
And Performance ◽  
Personal Tax

The Tax Payer obidience in fulfiling their taxation obligation will be influenced a lot by the satisfaction level toward the service fiscus. The aim of this observation is to know the response of Tax Payer toward service quality through importance and performance. The population which become the object of this observation is the personal Tax Payer registered in Bogor Tax Service Office and the number of respondents taken as the sample are 100 respondents with Slovin formula. The analysis method used is descriptive analysis and importance-performance analysis.   The result of this observation will be able to be used as one of the input to Bogor Tax Service Office in improving the quality service and for the following observation, especially those who take the same object as the observation in order to improve the quality service to the Tax Payer based on the service of its working way which is felt less. Otherwise it is important for The Tax Payer, maintaining the good work or balancing the service quality based on the working way which is evaluated less important by The Taxe Payer, but has been done reasonably well or very well by The Service Office

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