Presentation from Master of Science thesis defense (Evaluation of Rapid Impact Compaction for Transportation Infrastructure Applications; July 15, 2011)
Presentation slides for my PhD thesis dissertation on machine learning algorithm development to analyze multi dimensional genomic data such as microarrays
Presentation from Master of Science thesis defense (Evaluation of Rapid Impact Compaction for Transportation Infrastructure Applications; July 15, 2011)
Presentation slides for my PhD thesis dissertation on machine learning algorithm development to analyze multi dimensional genomic data such as microarrays
An Empirical Study on Faith-based Microfinance as an Alternative Tool of Poverty Alleviation. The doctoral study discussed the role of FBOs in microfinance.
Thesis defense presentation of Justin Phillips (SDSU). "The Role of Relatedness and Autonomy in Motivation of Youth Physical Activity: A Self-Determination Perspective."
An Empirical Study on Faith-based Microfinance as an Alternative Tool of Poverty Alleviation. The doctoral study discussed the role of FBOs in microfinance.
Thesis defense presentation of Justin Phillips (SDSU). "The Role of Relatedness and Autonomy in Motivation of Youth Physical Activity: A Self-Determination Perspective."
This presentation investigates the hypersonic high enthalpy flow in a leading edge configuration using computational techniques, specifically using computational fluid dynamics.
Flow separation in/over a hypersonic space vehicle is an important phenomenon which occurs due to flow interaction with various geometric elements of the vehicle. This however can lead to adverse pressure gradient and localised intense heating resulting in detrimental consequences for the successful performance of the vehicle. It is therefore critical and necessary to understand the separation phenomenon and its characteristics. In the last several decades, experimental, analytical and computational techniques have been used to investigate flow separation in hypersonic flow. Despite these efforts, large gaps still remain in our understanding of the aerothermodynamics of flow separation. Typically, flow separation can be examined with simple geometric configurations representing a generic region of separated flow over a vehicle. These could range from geometries such as compression corners, flat plate with steps to blunt bodies such as cylinders and spheres. However, most of these configurations exhibit a pre-existing boundary layer prior to separation thus increasing the complexity of the interaction. A simple geometry capable of producing separation at the leading-edge without any pre-existing boundary layer is therefore considered here. This geometry was originally proposed by Chapman in 1958 for supersonic flows at high Reynolds numbers and is investigated here numerically under laminar low density hypersonic conditions using N-S and DSMC methods.
EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL IAEME Publication
Experiments were carried out on tubular solar still in Allahabad climate conditions. Energy storage medium is used in still to produce distillate in the off sunshine hours .A correlation is
developed for the productivity of a still using experimental results .The proposed correlation has been validated with the experimental results .The regression coefficient approaches to unity and the correlation may be perfect positive with least error .
We proposed Single Activation Energy Model for Radiation Damage in SSNTDs, including most of Insulators, for example, Glasses, Polymers and Mineral Crystals. My Ph.D. Scholars,SK Modgil, RK Bhatia, and Gurinder Singh made major contributions in improving this model.
Invited lecture of the Simposium N "Surface Engineering - functional coatings and modified surfaces" at the XIII SBPMat (Brazilian MRS) meeting, in João Pessoa (Brazil). The lecture took place on September 29th, 2014.
The speaker was Tiberiu Minea, Professor at Université Paris-Sud (France), President of the French Federation of Scientific Societies and President of the Scientific and Technical Committee at the French Vacuum Society.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptx
My Thesis Defense Presentation
1. Thesis Defense for the Degree of Master of Science
2010
MAY 3, ANKARA
NUMERICAL MODELING AND
PERFORMANCE ANALYSIS
OF SOLAR-POWERED IDEAL
ADSORPTION COOLING SYSTEMS
Department of Mechanical Engineering
Middle East Technical University
2. Presentation Outline
2
1. Motivation
2. Adsorption Cycle Descriptions
i. Simple cycle
ii. Cycle enhancements
3. Scope of the Study
4. Models
5. Conditions Analyzed
6. Results
7. Conclusions
8. Future Work
Onur TAYLAN Thesis Defense
METU May 3, 2010
3. 1. Motivation
3
Electricity demand exceed supply in Turkey in
2016-2017 (TEIAS, 2009)
Increasing cooling loads Increase in electricity
demand especially on Mediterranean coast
Many hotels use conventional AC systems in
Antalya
Need to decrease the electricity demand for
cooling in Antalya
Need for sustainable and renewable solutions
Onur TAYLAN Thesis Defense
METU May 3, 2010
4. 2. Adsorption Cycle Descriptions
4
Simple Cycle
Baker and Kaftanoglu (2007)
Onur TAYLAN Thesis Defense
METU May 3, 2010
5. 2. Adsorption Cycle Descriptions
5
Cycle Enhancements
Heat recovery cycle
Mass recovery cycle
Heat and mass recovery cycle
Thermal regeneration
Thermal wave
Thermal wave cycle with mass recovery
Convectivethermal wave
Rotary beds
Onur TAYLAN Thesis Defense
METU May 3, 2010
6. 2. Adsorption Cycle Descriptions
6
Heat Recovery Cycle
Two adsorbent beds
operating out of phase
Heat transferred from
bed being cooled to
bed being heated
Increase in COP
Wang (2001)
Onur TAYLAN Thesis Defense
METU May 3, 2010
7. 2. Adsorption Cycle Descriptions
7
Thermal Wave Cycle
Taylan et al. (2009)
Two beds connected via HTF
HTF between Thot and To
Sorption processes create dT1 and dT2
Onur TAYLAN Thesis Defense
METU May 3, 2010
8. 3. Scope of the Study
8
What was available What was needed
Thermodynamic models Assess the feasibility of
of using solar energy for
adsorption cooling
Simple systems
Heat recovery Develop fast models to
Thermal wave perform a large number
of parametric studies
MATLAB models of
Obtain basic
Simple
performance trends as
Heat recovery operating conditions vary
Onur TAYLAN Thesis Defense
METU May 3, 2010
9. 3. Scope of the Study
9
What has been added
TRNSYS-compatible MATLAB model of thermal wave
cycle
Thermodynamic models of
Thermal wave with adiabatic mass recovery (AMR)
Thermal wave with isothermal mass recovery (IMR)
TRNSYS model of solar-thermal system
Three commercial collector models (two flat plate and
one evacuated tube) integrated with the solar-thermal
system
Onur TAYLAN Thesis Defense
METU May 3, 2010
10. 3. Scope of the Study
10
What has been added (cont’d)
Modeling five commonly-used adsorbent –
refrigerant (working) pairs using MATLAB
Developing a normalized seasonal model
Running steady and seasonal-transient simulations
with the integrated model
Investigating basic trends in the cycle and system
performances as some design parameters are
varied
Onur TAYLAN Thesis Defense
METU May 3, 2010
11. 4. Models
11
Solar Thermal System Model
TRNSYS Model MATLAB Model
Taylan et al. (2010)
Onur TAYLAN Thesis Defense
METU May 3, 2010
12. 4. Models
12
Normalized Cooling Load
To ti Trfrc
q load,N ti =
Max To Trfrc
Normalized Cooling Capacity
q F ti × COPads ti
q clg,N ti = S×
Max qF ×COPads
Normalized Match Factor
qMatch,N ti = qclg,N ti qload,N ti
Onur TAYLAN Thesis Defense
METU May 3, 2010
13. 4. Models
13
Storage (qStorage,N and qStorage,max)
Loss (qLoss,N) if qStorage,N = qStorage,max and qclg,N > qload,N
Backup (qBackup,N) if qStorage,N = 0 and qclg,N < qload,N
Solar Fraction ( f ) & Loss Fraction ( l )
qclg,tot q
i
clg,N ti qLoss,tot q
i
Loss,N ti
f= = l= =
qload,tot q
i
load,N ti qload,tot q
i
load,N ti
Onur TAYLAN Thesis Defense
METU May 3, 2010
14. 4. Models
14
Normalized Collector Area
q clg,N ti
Acoll , N =
G ti
× COPsys ti
Grfrc
Normalized Mass of Adsorbent
Max X
-1
mads,N =
X base
Onur TAYLAN Thesis Defense
METU May 3, 2010
15. 5. Conditions Analyzed
15
Adsorption cycle types
Reversible (Rev)
Simple
Heat recovery with two spatially isothermal beds (HRec)
Thermal wave with no mass recovery (NMR)
Thermal wave with adiabatic mass recovery (AMR)
Thermal wave with isothermal mass recovery (IMR)
Adsorbent – Refrigerant (working) pairs
Zeolite NaX – Water (Z1)
Zeolite X13 – Water (ZW)
Silica Gel – Water (SG)
Activated Carbon – Ammonia (CA)
Activated Carbon – Methanol (CM)
Onur TAYLAN Thesis Defense
METU May 3, 2010
16. 5. Conditions Analyzed
16
Collector types
Flat plate collector (FP)
Evacuated tube collector (ET)
Cooling tower types or condensation temperature Tcond
Dry cooling tower
Wet cooling tower
Evaporation temperature Tevap
Excess bed temperature Texcess To Tcond
Heat capacity ratio R mshell cshell mHTF cHTF mads cads 1
Maximum bed temperature Thot
Onur TAYLAN Thesis Defense
METU May 3, 2010
17. 6. Results
17
Comparison of different adsorption cycles
5.0
4.5
4.0 Reversible
3.5 NMR with bypass
3.0 NMR without bypass
COPads
2.5 AMR with bypass
2.0 AMR without bypass
1.5 IMR with bypass
1.0 IMR without bypass
0.5 Heat Recovery
0.0 Simple
90 100 110 120 130 140 150 160 170 180
Maximum Bed Temperature, Thot (oC)
Base Case: Z1 pair, Tcond = 30oC, Tevap = 10oC, R = 10 and Texcess = 0oC
Onur TAYLAN Thesis Defense
METU May 3, 2010
18. 6. Results
18
Comparison of working pairs
1.4
1.2
1.0
Rev
COPsys,clg
0.8 Z1
ZW
0.6
SG
0.4 CA
0.2 CM
0.0
80 90 100 110 120 130 140 150 160 170 180 190
Maximum Bed Temperature, Thot (oC)
Base Case: NMR, Tcond = 30oC, Tevap = 10oC, R = 10 and Texcess = 0oC
Onur TAYLAN Thesis Defense
METU May 3, 2010
19. 6. Results
19
Comparison of collectors and solar radiation levels
0.14
0.12
0.10
FP,500
COPsys
0.08 FP,750
0.06 FP,1000
ET,500
0.04 ET,750
0.02 ET,1000
0.00
90 100 110 120 130 140 150
Maximum Bed Temperature, Thot (oC)
Base Case: Z1 pair, Tcond = 20oC, Tamb = 35oC, Tevap = 10oC, R = 10 and Texcess = 10oC
Onur TAYLAN Thesis Defense
METU May 3, 2010
20. 6. Results
20
Comparison of cooling towers and Tevap
0.16
0.14
0.12 Simple,Dry
0.10 HRec,Dry
COPsys,clg
Simple,Wet
0.08
HRec,Wet
0.06 Simple,5
0.04 Simple,15
0.02 HRec,5
HRec,15
0.00
90 100 110 120 130 140 150 160 170 180 190
Maximum Bed Temperature, Thot (oC)
Base Case: Z1 pair, Tcond = 30oC, Tevap = 10oC, R = 10 and Texcess = 10oC
Onur TAYLAN Thesis Defense
METU May 3, 2010
21. 6. Results
21
Comparison of Texcess and R
0.30
0.25
Simple,DTexcess=0
COPsys,clg
0.20 Simple,DTexcess=10
HRec,DTexcess=0
0.15 HRec,DTexcess=10
Simple,R=0
0.10 Simple,R=3
HRec,R=0
0.05
HRec,R=3
0.00
80 90 100 110 120 130 140 150
Maximum Bed Temperature, Thot (oC)
Base Case: CA pair, Tcond = 30oC, Tevap = 10oC, R = 10 and Texcess = 10oC
Onur TAYLAN Thesis Defense
METU May 3, 2010
22. 6. Results
22
Comparison of investigated operating conditions
9.0
8.0
7.0 base
Tcond=20
6.0
Tcond=40
COPads
5.0
Tevap=5
4.0 Tevap=15
3.0 DTexcess=0
2.0 DTexcess=10
1.0 Tcond=20, R=0
0.0 Tcond=20, R=10
90 100 110 120 130 140 150 160 170 180
Maximum Bed Temperature, Thot (oC)
Base Case: IMR with Z1 pair, Tcond = 30oC, Tevap = 10oC, R = 3 and Texcess = 5oC
Onur TAYLAN Thesis Defense
METU May 3, 2010
23. 6. Results
23
Normalized Results (Solar and Loss Fractions)
f and l not affected by cycle type
Using ET increases both f and l
Using wet cooling tower increases f and l for FP and
decreases l for ET
Decreasing Texcess or R or increasing S increases f and
decreases l
As Thot increases f and l decrease
1 – f proportional to qBackup
Onur TAYLAN Thesis Defense
METU May 3, 2010
25. 6. Results
25
Normalized Results (Required Adsorbent Mass)
2.5
Normalized Adsorbent Mass
2.0
Dry+10degC
1.5
Dry+5degC
mads,N
Dry
1.0 Wet+10degC
Wet+5degC
0.5 Wet
0.0
90 120 150 180
Maximum Bed Temperature, Thot (oC)
Onur TAYLAN Thesis Defense
METU May 3, 2010
26. 7. Conclusions
26
Suggested configuration
Thermal wave cycle
Evacuated tube collector
Wet cooling tower
High evaporation temperature
Low excess bed temperature
Low heat capacity ratio for simple and heat recovery
cycles
High storage capacity
Other parameters vary between analyzed cases
Onur TAYLAN Thesis Defense
METU May 3, 2010
27. 7. Conclusions
27
Working pair selection depends on the available
maximum bed temperature
Implementing heat recovery increases the
performance of simple cycle
Implementing mass recovery to thermal wave cycles
does not increase the performance significantly,
although it increases the complexity of the system
Backup power needed for Antalya
Onur TAYLAN Thesis Defense
METU May 3, 2010
28. 8. Future Work
28
Implementing heat and mass transfer and diffusion
equations based on the specific thermal design of
the adsorbent bed
Extending the current analysis with exergy analysis
Modeling some other kinds of thermal wave
Modeling heat recovery cycle with infinite number
of beds and comparing with thermal wave cycle
Introducing new adsorbent – refrigerant pairs
Verifying the results of the present study
experimentally, especially the thermal wave cycle
Onur TAYLAN Thesis Defense
METU May 3, 2010
29. References
29
Baker, D. K., and Kaftanoglu, B., "Limits to the Thermodynamic Performance of a
Thermal Wave Adsorption Cooling Cycle," Proceedings of HEFAT 2007, pp. 6, Sun
City, South Africa, 2007.
Taylan, O., Baker, D. K., and Kaftanoglu, B., "Parametric Study and Seasonal
Simulations of a Solar Powered Adsorption Cooling System," Proceedings of ECOS
2009, pp. 833 - 842, Foz do Iguacu, Parana, Brazil, 2009.
Taylan, O., Baker, D. K., and Kaftanoglu, B., "COP Trends for Ideal Thermal Wave
Adsorption Cooling Cycles with Enhancements," Int. J. of Refrigeration: Under
Review, 2009.
Taylan, O., Baker, D. K., and Kaftanoglu, B., "Adsorbent – Refrigerant Comparison
for a Solar Powered Adsorption Cooling System Using Seasonal Simulations,"
Proceedings of 10th REHVA World Congress, Antalya, Turkey, 2010.
"Turkish Electrical Energy 10-Year Generation Capacity Projection," Turkish
Electricity Transmission Co. (TEIAS), Ankara, 2009.
Wang, R. Z., "Performance Improvement of Adsorption Cooling by Heat and Mass
Recovery Operation," Int. J. of Refrigeration, vol. 24, no. 7, pp. 602-611, 2001.
Onur TAYLAN Thesis Defense
METU May 3, 2010
30. Thank you!
Onur TAYLAN
M.Sc. Candidate
Department of Mechanical Engineering Thesis Defense
Middle East Technical University May 3, 2010
