A Solution to Increase Natuna D Alpha’s Resource Utilization by Cryogenic Distillation: Conceptual Design & Sensitivity Study

2019 ◽  
Author(s):  
Wijoyo Niti Daton ◽  
Ezra Revolin ◽  
Siptian Nugrahawan ◽  
Prasandi Abdul Aziz ◽  
Tutuka Ariadji ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Resource Utilization ◽  
Sensitivity Study ◽  
Design Sensitivity ◽  
Cryogenic Distillation

A Simplified Conduction Based Modeling Scheme for Design Sensitivity Study of Thermal Solution Utilizing Heat Pipe and Vapor Chamber Technology

2003 ◽  
Vol 125 (3) ◽  
pp. 378-385 ◽  
Author(s):  
Ravi S. Prasher
Keyword(s):  
Heat Pipe ◽  
Temperature Drop ◽  
Heat Pipes ◽  
Sensitivity Study ◽  
Design Sensitivity ◽  
Thermal Design ◽  
Vapor Chamber ◽  
Modeling Tools ◽  
Heating Source ◽  
Thermal Solution

This paper introduces a simplified modeling scheme for the prediction of heat transport capability of heat pipes and vapor chambers. The modeling scheme introduced in this paper enables thermal designers to model heat pipes and vapor chambers in commercially available conduction modeling tools such as Ansys™ and IcePak™. This modeling scheme allows thermal designers to perform design sensitivity studies in terms of power dissipation of heat pipes and vapor chambers for different scenarios such as configurations, heat sink resistance for a given temperature drop between the heating source and the ambient. This paper also discusses how thermal designers can specify requirements to heat pipe/vapor chamber suppliers for their thermal design, without delving into the complete thermo-fluidic modeling of this technology.

Thermal Management of a 15 kV/100 kVA Intelligent Universal Transformer

2011 ◽  
Vol 3 (1) ◽  
Author(s):  
Ronald Warzoha ◽  
Amy S. Fleischer
Keyword(s):  
Heat Pipe ◽  
Power Electronics ◽  
Thermal Management ◽  
Operating Temperature ◽  
Heat Pipes ◽  
Sensitivity Study ◽  
Design Sensitivity ◽  
Thermal Dissipation ◽  
System Failure ◽  
Significant Challenge

The thermal management of power electronics presents a significant challenge to thermal engineers due to high power loads coupled with small footprints. Inadequate thermal dissipation of these loads can lead to excessively high equipment temperatures and subsequent system failure. In this study, a unique power electronics-based transformer, called the intelligent universal transformer (IUT), is thermally analyzed using the computational fluid dynamics software ICEPAK. The objective of this work is to examine the use of a finned heat pipe array for the power electronics in the IUT. A design sensitivity study was performed to determine the effect of the number of fins attached to the heat pipe array, the number of heat pipes in the heat pipe array, and the fin material on the steady-state operating temperature of the power electronics. It was determined that a set of 33 copper fins attached to an array of 36 heat pipes on each side of the containment unit is sufficient for continuous operation of the power electronics. This analysis and thermal management solution will be applicable not only to this situation but also to other high density power electronics applications.

Conceptual Design of an Oil Shale Comprehensive Refinery Process with High Resource Utilization

2016 ◽  
Vol 30 (9) ◽  
pp. 7786-7801 ◽  
Author(s):  
Huairong Zhou ◽  
Yu Qian ◽  
Qingchun Yang ◽  
Siyu Yang
Keyword(s):  
Conceptual Design ◽  
Resource Utilization ◽  
Oil Shale ◽  
High Resource ◽  
Refinery Process

A Simplified Modeling Scheme for Design Sensitivity Study of Thermal Solution Utilizing Heat Pipe and Vapor Chamber Technology

2001 ◽  
Author(s):  
Ravi S. Prasher ◽  
James Shipley ◽  
Amit Devpura
Keyword(s):  
Heat Pipe ◽  
Temperature Drop ◽  
Heat Pipes ◽  
Sensitivity Study ◽  
Design Sensitivity ◽  
Thermal Design ◽  
Vapor Chamber ◽  
Modeling Tools ◽  
Heating Source ◽  
Simplified Modeling

Abstract This paper introduces a simplified modeling scheme for the prediction of heat transport capability of heat pipes and vapor chambers. The modeling scheme introduced in this paper enables thermal designers to model heat pipes and vapor chambers in commercially available conduction modeling tools such as Ansys™ and IcePak™. This modeling scheme allows thermal designers to perform design sensitivity studies in terms of power dissipation of heat pipes and vapor chambers for different scenarios such as configurations, heat sink resistance for a given temperature drop between the heating source and the ambient. This paper also discusses how thermal designers can specify requirements to heat pipe/vapor chamber suppliers for their thermal design, without delving into the complete thermofluidic modeling of this technology.

Simulation of Silo Combustor Liners Transient Behavior for Advanced Design Upgrade

2015 ◽  
Author(s):  
Ilya Fedorov ◽  
Vladimir Vassiliev ◽  
Alexandre Arkhipov ◽  
Fulvio Magni
Keyword(s):  
Gas Turbines ◽  
Three Dimensional ◽  
Transient Behavior ◽  
Sensitivity Study ◽  
Design Sensitivity ◽  
Coating Application ◽  
Hot Gas ◽  
Detailed Structural Analysis ◽  
Barrier Coating ◽  
Casing Deformation

Many Alstom heavy-duty gas turbines with a silo combustor are in service and moreover undergoing upgrades for performance augmentation, lifetime extension, and emission reduction. The combustor liners, which are exposed to high gas temperatures, may require design tuning for these upgrades, and therefore reliable simulation of their behavior is of utmost importance. This paper focuses on a case study of transient behavior of the Hot Gas Casing, a transition liner between compressor, turbine and silo combustor. Following a three-dimensional thermal assessment based on computational fluid dynamics, detailed structural analysis is done to identify the drivers behind different types of Hot Gas Casing deformation, observed after upgraded combustor introduction. Thermal Barrier Coating application is proposed to reduce Hot Gas Casing bending. The solution was confirmed analytically and successfully introduced in the field. Good correlation of field findings and finite element prediction was found. It is shown that only a combined effect of thermal deformation, cyclic loading and creep may explain the observed behavior of the part. A detailed design sensitivity study is performed, comparing different approaches to deformation reduction: application of ribs, corrugations and wall thickness increase. The best solution in terms of manufacturability and its impact on part deformation is chosen. It is found that wall corrugation does not provide the desired effect due to the nature of part deformation.

Optimization of a Non-Pneumatic Tire for Reduced Rolling Resistance

2011 ◽  
Author(s):  
Mallikarjun Veeramurthy ◽  
Jaehyung Ju ◽  
Lonny L. Thompson ◽  
Joshua D. Summers
Keyword(s):  
Shear Band ◽  
Rolling Resistance ◽  
Vertical Displacement ◽  
Sensitivity Study ◽  
Design Sensitivity ◽  
Fe Model ◽  
Vertical Stiffness ◽  
Design Variables ◽  
Geometric Variables ◽  
Pneumatic Tires

Recently, the development of non-pneumatic tires (NPT) such as the Michelin Tweel is receiving increased attention due to potential advantages over pneumatic tires, including characteristics of rolling resistance (RR). This study focuses on the design of a NPT based on properties of vertical stiffness and rolling energy loss. Using a finite element (FE) model, a parametric study is conducted to study the effect on vertical stiffness and RR response considering two design variables; (a) thickness of the spokes, and, (b) the shear band thickness of the NPT. Using the two geometric variables, a design of experiments (DOE) is performed to study the effect on both RR and vertical displacement. Results from the DOE are used to create response surface models (RSM) for both the objective function (minimal RR) and a constraint on vertical deflection. The analytical RSM function is optimized for minimizing the rolling loss subjected to the given constraint. In addition a design sensitivity study is performed to evaluate the influence of the design variables on the output response. Results indicate that both variables have significant effect on RR, with the shear band thickness having the greater effect.

Nuclear data requirements for the ADS conceptual design EFIT: Uncertainty and sensitivity study

2010 ◽  
Vol 37 (11) ◽  
pp. 1570-1579 ◽  
Author(s):  
N. García-Herranz ◽  
O. Cabellos ◽  
F. Álvarez-Velarde ◽  
J. Sanz ◽  
E.M. González-Romero ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Nuclear Data ◽  
Sensitivity Study ◽  
Data Requirements
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