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To use graphical method in solving LP problems, you must ensure:

1. The problems is linear. All constraints and objective functions must be linear.

2. The number of variables is limited to TWO (2) as we have x-axis and y-axis only in a graph paper!

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Profit-making pants 👖 #LearnWithChegg #EduTok #MathTok #mathhelp 

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@cheggmath
Profit-making pants 👖 #LearnWithChegg #EduTok #MathTok #mathhelp
♬ Echos in My Mind (Lofi) - Muspace Lofi

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Newton Method - Formative Assessment 171224

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Newton Method - Formative Assessment 171224

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Kindly share your view here:

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STUDENT’S FEEDBACK ON CGE697 CLASS (ANONYMOUS)

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STUDENT’S FEEDBACK ON CGE697 CLASS (ANONYMOUS)

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Date: 13/5/2025

Coverage:

1. Optimization Basics

2. Theory of convexity

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Age: 44

Asal: Muar, JDT

Status: Married with 3 children

Passion:

Enjoys new method of teaching and hope you guys too!

Area of Expertise:

Process System Engineering  - Process Control, Process Design, Process Integration

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LESSON PLAN CGE697 SEM 20252 (NEW FORMAT)

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Q1 : Why do we optimise in process design?
A1 : Among others, optimization of process design are needed to: 1. Minimise total cost of a design 2. Optimise operation (planning and scheduling) 3. Minimise capital expenditure 4. Minimise operating cost 5. Maximise profit 6. Improve plant performance (yield, selectivity, use of resources, etc.) 7. Improve environmental performance

Q2 : What is objective function?
A2 : Objective function is performance index that is expressed in terms of design variables. It is the goal of optimisation is to find the values of the variables that yield the optimal value of the objective function.

Q3 : What are the importance of design variable(s) in optimization?
A3 : In optimization, design variable is always involved with a trade-off. Changing the value of a variable may bring benefits in one part of the design but has detrimental effects in other parts. There must be an optimum value for the design variable(s) in achieving the objective functions.

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Q1 : Why do we optimise in process design? A1 : Among others, optimization of process design are needed to: 1. Minimise total cost of a design 2. Optimise operation (planning and scheduling) 3. Minimise capital expenditure 4. Minimise operating cost 5. Maximise profit 6. Improve plant performance (yield, selectivity, use of resources, etc.)

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https://drive.google.com/open?id=1eOngXP3nlygR2cpIyoPYIEXHz_cODb_a

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https://forms.gle/GZn3iinvGCJ4zVY46

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Solver Test (Individual) - All the Best!

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Solver Test (Individual) - All the Best!

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Date: Week 13

Coverage:

1. Students to use MS Excel to apply Newton method

2.  Students to use MS Excel Solver to solve LP/MILP/NLP/MINLP

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1. Kuliah 1: Week 1 @ 24/3 - 30/3

2. Cuti Raya Aildilfitri : 31/3 - 5/4

3. Kuliah 2: Week 2 - 9 @ 7/4 - 29/5

4. Cuti Pertengahan Sem: 30/5 - 8/6

5. Kuliah 3: Week 10 - 14 @ 9/6 - 13/7
6. Cuti Ulangkaji: 14/7 - 20/7

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Define Separation Degree for Vessel Sizing #processdesign #boostrand #separator

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Please leave a comment stating a point or two. Compulsory to all.

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Inside the Mind of a Master Procrastinator | Tim Urban | TED

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1. Create a GOOGLE account/gmail account (if you don't have one yet).

2. Go to PADLET website using this link --> https://padlet.com/referrals/sitirafidah660

3. Sign in to PADLET using your GOOGLE Account.

4. Join a PADLET and copy this link.

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Follow us on Twitter
Question, remark ? Contact us atcontact@myengineeringtools.com

Section summary

2. Example of heat loss calculation of insulated pipe : Step by Step guide

3. Free Excel calculation tool for insulated pipe heat loss : pipe heat loss calculator Excel

In factories, pipes are typically routed outside. This may not be a problem for most of products and circumstances, but in the case of winter conditions or if the product is sensitive to a loss of temperature adding an insulation layer to the pipe is helpful to limit the temperature loss and potential impact on production.

1. Heat losses through insulated pipe

How heat is lost through an insulated pipe ?

There is a heat transfer from the inside of the pipe to the outside air. The heat transfer is a combination of convection and conduction :

Convection heat transfer from fluid in pipe to pipe material

Conduction through the pipe material

Conduction through the insulating material

Convection from the insulating material to the outside air

1.1 Overall heat transfer

The heat transferred from the inside of the pipe to the air can be calculated thanks to the following overall heat transfer equation : Q = U*A*(Ti-Ta)

The overall heat transfer coefficient can be calculated by summing the different resistances to heat transfer the following way :

With :

Q = heat loss (BTU/h)
A o = heat transfer area (ft2)
U = overall heat transfer coefficient (BTU/h.ft2.F)
T i = inside temperature (R)
T a = air temperature (R)
r ₁ = inside radius of the pipe (ft)
r ₂ = outside radius of the pipe (ft)
r ₃ = outside radius of the pipe + insulation layer (ft)
λ ₁ = thermal conductivity of the pipe (BTU/h.ft.F)
λ ₂ = thermal conductivity of the insulation (BTU/h.ft.F)
hi = heat transfer coefficient on the inside of the tube (BTU/h.ft2.F)
ho = heat transfer coefficient on the outside of the tube (BTU/h.ft2.F)

1.2 Outside heat transfer coefficient calculation

The heat transfer coefficient has 2 components : one due to radiation heat exchange, and the other due to convection

Radiation heat transfer

In the shortcut calculation method presented in this page, the heat transfer coefficient by radiation is assumed to be hr = 1 BTU/h.ft2.F, as the temperature at the surface of the insulating material is expected to be low.

Convection in the presence of wind

If wind is present, there is a tremendous influence on the heat transfer coefficient which can be estimated the following way : hc = 0.11*c*G 0.6/D 0.4

With :

h c = convection heat transfer coefficient (BTU/h.ft ².F)
c = specific heat (BTU/lb/F) = 0.24 for air
G = mass velocity of air (lb/h.ft ²) = rho.v
rho = density (lb/ft ³) = 0.075 for air
v = wind speed (ft/h)
D o = pipe diameter (ft)

1.3 Total loss of heat through insulated pipe

The overall heat transfer coefficient can be calculated, then the heat loss through the insulation with : Q = U*A*(Ti-Ta)

With U calculated by substituting the heat transfer coefficient calculated above.

2. Example of heat loss calculation of insulated pipe : Step by Step guide

Considering a pipe a 66 mm external diameter and 10 m length that is transporting steam at 160c. What is the heat loss when the pipe is insulated by a 2 cm insulating material, while being located outside, in air at 20c and with wind at 10 km/h.

The pipe is in carbon steel, with a thermal conductivity of 142 W/m.K

The insulating material has a thermal conductivity of 0.086 W/m.K

It is assumed that the skin temperature of the pipe is equal to the temperature of the fluid, the resistance to heat transfer being on the outside of the pipe.

STEP 1 : Convert to US units

Di = 66 mm = 0.2165 ft
Do = 66mm+20*2 = 106 mm = 0.348 ft
L = 10 m = 32.8 ft
Ts = 160c = 320 F = 780 R
Ta = 20c = 68 F = 527.7 R
v = 10 km/h = 32808 ft/h
k1 = 142 W/m.K = 25 BTU/h.ft.F
k2 = 0.086 W/m.K = 0.05 BTU/h.ft.F

STEP 2 : Calculate the heat loss due to radiation

The heat loss due to radiation is expected to be low and estimated to 1 BTU/h.ft2.F

STEP 3 : Calculate the mass velocity of air

Considering G = mass velocity of air (lb/h.ft2) = rho.v

G = rho.v = 0.075*32808 = 2498.8 lb/h.ft2

STEP 4 : Calculate the heat transfer coefficient by convection

The heat transfer coefficient can be calculated from the correlation given in paragraph 1.3 above :

h = 0.11*c*G 0.6/Do 0.4 = 0.11*0.24*2498.8 0.6 / 0.348 0.4 = 4.4 BTU/h.ft2.F

STEP 5 : Calculate outside heat transfer coefficient

The outside heat transfer coefficient is the sum of :

ho = hc+hr = 1 + 4.4 = 5.4 BTU/h.ft2.F

STEP 6 : Calculate the overall heat transfer coefficient

U = 1/(0.174/(0.0985*1500) + 0.174*ln(0.10825/0.0985)/25 + 0.174*ln(0.174/0.10825)/0.05 + 1/5.4) = 0.5 BTU/h.ft2.F

STEP 7 : Calculate the total heat loss

Q = U*Ao*(Ts-Ta) =4937.9 BTU/h

3. Free Excel calculation tool for insulated pipe heat loss

The heat flux through a pipe or a pipe with insulation can be calculated thanks to this free pipe heat loss Excel calculator : Calculation Tool - heat loss through insulated pipe

Warning : this calculator is provided to illustrate the concepts mentioned in this webpage, it is not intended for detail design. It is not a commercial product, no guarantee is given on the results. Please consult a reputable designer for all detail design you may need.

Source

[Chopey] Handbook of Chemical Engineering calculations, Chopey et al, McGraw Hill, 2004

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Heat loss calculation of insulated pipe to air (with calculator Excel)

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Follow us on Twitter Question, remark ? Contact us atcontact@myengineeringtools.com Section summary 2. Example of heat loss calculation of insulated pipe : Step by Step guide 3. Free Excel calculation tool for insulated pipe heat loss : pipe heat loss calculator Excel In factories, pipes are typically routed outside.

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Chap 2 - Fundamentals of Unconstrained Optimization.pdf

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July 2021

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Solve the problems given.

DUE: WEEK 6 (9/5/2025 - Friday @5.00pm)

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1. Three phase separator

2. Distillation column

3. Absorber

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1. Introduce yourself in a short video (as in video resume) and post it in the next column.
2. Alternatively, post a photo of yourself (selfies are preferable) and state your name, origin and passion.

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Modelling and Optimisation of Oil and Gas Production Systems

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Modelling and Optimisation of Oil and Gas Production Systems

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https://drive.google.com/open?id=1RmZ4FEz_oLUy8SOk3Xn43RPm_aCFJbCl

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July 2020

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Dynamic Oil & Gas Production Systems Optimization via Explicit Reservoir & Well Multiphase Flow Simulation

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Dynamic Oil & Gas Production Systems Optimization via Explicit Reservoir & Well Multiphase Flow Simulation

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https://drive.google.com/open?id=1WghZqo6fK23QBrHgCN9VRdCHhmwLzaO9

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Matrix addition, multiplication, inversion, determinant and rank calculation, transposing, bringing to diagonal, row echelon form, exponentiation, LU Decomposition, QR-decomposition, Singular Value Decomposition (SVD), solving of systems of linear equations with solution steps

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https://docs.google.com/forms/d/e/1FAIpQLSexccf9UrznrMChiERT6RKV2VdY0-y6VFCONh-Ru4G-PkpQIw/viewform?usp=sf_link

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Access Google Forms with a personal Google account or Google Workspace account (for business use).

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Using Excel for tornado plot: https://www.youtube.com/watch?v=U3hTbYnTGGM

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https://drive.google.com/open?id=13R-e94fkT8qqGyOV-jxXcQUAmzrBueJr

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This is the updated version of your Group Asgmt. Pls register your groupings the the comment section i.e. Group 1A (list all 5 members), Group 2A etc.

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Development and Applications of Production Optimization Techniques For Petroleum Fields

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Development and Applications of Production Optimization Techniques For Petroleum Fields

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https://drive.google.com/open?id=1RHyVApWeWi87quDY1VM5oExvQdEbNJwN

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Formative Assessment 2 - Basics of Matrix Operation

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Formative Assessment 2 - Basics of Matrix Operation

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Chap 13 - Linear Programming-The Simplex Method.pdf

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June 2015

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Chap 14 - Linear Programming- Interior-Point Methods.pdf

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Optimization of Chemical Processes - Edgar Himmelblau and Lasdon 2nd ed.pdf

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Optimization of Chemical Processes - Edgar Himmelblau and Lasdon 2nd ed.pdf

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Note - Numerical Analysis for Chemical Engineers

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Note - Numerical Analysis for Chemical Engineers

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أدب المرء خير من ذهبه 

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أدب المرء خير من ذهبه

adab seseorang itu jauh lebih berharga daripada emas yang dimilikinya

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“Bukankah Dia mendapati engkau seorang yatim, lalu Dia melindungimu? Dan Dia mendapati engkau kebingungan lalu memberikan hidayah? Dan dia mendapati engkau kekurangan, lalu Dia memberikan kecukupan?”

(Surah ad-Dhuha: 6-8)

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No matter how intelligent you are, if you can't respect others and behave well with others, all is just in vain.

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"The strong person is not the one who wins in a fight, but the one who can control their anger."

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"When you feel lost, remember that God is always the best guide."

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indeed what is to come will be better for you than what has gone by (93:4)

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"slow down and enjoy the moment you're in and live in your life"

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عَنْ أبِى هُرَيْرَة (ر) أنَّ رَسُول الله .صَ. قَالَ: إذَا مَاتَ الإنسَانُ انْقَطَعَ عَمَلُهُ إلاَّ مِنْ ثَلاَثٍ:

(صَدَقَةٍ جَارِيَةٍ اَو عِلْمٍ يُنْتَفَعُ بِهِ, اَووَلَدٍ صَالِحٍ يَدْعُولَهُ (رواه المسلم

“Apabila anak Adam meninggal, maka amalnya terputus kecuali dari tiga perkara, sedekah jariah (wakaf), ilmu yang bermanfaat, dan anak shaleh yang berdoa kepadanya.” (HR Muslim)

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"All dreams are within reach. All you have to do is keep moving towards them."

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"It never hurts to help" Eek-the cat

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Rasulullah SAW bersabda:

إِنَّ لِلَّهِ عِنْدَ كُلِّ فِظْرٍ عُتَقَاءَ وَذَلِكَ فِي كُلِّ لَيْلَةٍ

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“Your good character will attract the hearts of others, even if they do not know you. Be a person with good morals, and others will be pleased with you.”

— Habib Ali Zainal Abidin Al Jufri —

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“Boleh jadi kamu membenci sesuatu, padahal ia amat baik bagimu, dan boleh jadi (pula) kamu menyukai sesuatu, padahal ia amat buruk bagimu. Allah mengetahui, sedang kamu tidak mengetahui.” [Al-Baqarah: 216]

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“One day, you will only have memories of your parents—cherish them while you still can.”

Be respectful, be polite and be humble to them.

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“the best among you are those who have the best manners and character.” - Prophet Muhammad

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hiduplah dengan tenang

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Never be afraid to fail but be afraid of feeling content with it

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Kelembutan dalam bertutur dan bertindak adalah tanda orang beradab.