Tuesday, June 23, 2009

VBA for MEP Calculations

Application ေတြထ မာ Programming အမးမး သးလ႔ ရပါတယ။ ဒအထ မာ သးတတရင အခနကန သကသာေစတ VBA (VisualBasics for Application) ကသးၿပး Engineering Formula Functions ေတြ ေရးတာ က မတဆကေပး ဘ႔ ရညရြယထားပါတယ။အဓက သးမ ေနရာ က ေတာ spread sheet (Microsoft Excel) အတြက ပါ။ တကယေတာ VBA က MS Offices ေတြ၊ WebScript ေတြ အတြက သာ မက AutoCad ® မာလညး အသးျပလ႔ ေကာငးတ programming တစခပါ။ AutoCad ® ကသးတသေတြ အတြက AutoLisp, vBA, Diesel, Script စတ programming အခ႕က နားလညရင ထပတလလ လပရတ process ေတြက အခနကန သကသာစြာ န႔ လပေဆာင ႏငပါတယ။ ရႈတရႈတေထြးေထြး တြကခကဘ႔ လအပတာေတြ၊ Trial and error Loopန႔တြကရတာေတြ အတြကလညး တစႀကမ စနစတက ေခါငးရႈတခ လကရင ေနာကတစခါ သးဘ႔ အဆငသင ျဖစေစပါမယ။

ContentsI. Basic of Programming

II. VBA for ExcelIII. Developing Programming Flowcharts for HVAC Air-Side Circular Duct Sizing Calculations (SI

Units)IV. VBA Codes for Air Duct (SI Units)V. Screenshots: Adding VBA Codes in Excel

VI. Screenshots: Use of VBA Functions in Excel WorksheetVII. Html Color Coding by VBA

VIII. References

I. Basic of ProgrammingProgramming Languages အလက Detail အမးမး ျဖစႏငေပမ basic instructions အခ႕ ကေတာ Languagesတငးလလ မာပါဝငေနတာ ေတြ႕ရပါမယ။

input: Get data from the keyboard, a file, or some other device.output: Display data on the screen or send data to a file or other device.Math / Operation : Perform basic mathematical operations like addition and multiplication.conditional execution: Check for certain conditions and execute the appropriate sequence ofstatements.repetition: Perform some action repeatedly, usually with some variation.

ဒါေတြရ အေျခခ ေတြ က Algorithm (or) Pseudocode and Program Flow Chart ေတြန႔ ျပလ႔ ရပါတယ။ Modularprogramming လ႔ေခၚတ Program အေသးေလး ေတြ အပငးလက အကန႔လက အစတစတ သးျခားခြ ေရးၿပး မ ေပါငးစပသးတ အခါ ေရးရတာေရာ၊ debug လပရတာေရာ လြယကလာပါတယ။Program ေရးတ အခါ စနစ တက Planning လပထားခဘ႔ လအပပါတယ။ မဟတရင အမားရာရ ျပငရ စတ Debuggingလပရတာ က ေရးရတာထက အဆေပါငး မားစြာ ပခကေစရ သာမက Crush ျဖစတ ျပနာ ေတြကပါ ထပရငး ေနရပါလမအးမယ။

Programming Flowchart န႔ ပတသကၿပး http://www.nos.org/htm/basic2.htm မာ သြား ေရာက ေလလာႏငပါတယ။ အဓက သသငတာ ကေတာ

Start / End : အစ န႔ အဆး (Programming တငးမာ အစ (Start) န႔ အဆး (End) ပါဝငရပါမယ။) သ႕ရ ပကေထာငက လးထားတ စတဂ ပပါ။Process : Computational steps or processing function of a program၊ ပက ရးရး စတဂပပါ။Decision Making and Branching၊ ႐ြမးဗတ ပ။

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II. VBA for ExcelExcel အတြက VBA Application ကေလလာတ အခါ သသငတာေတြ ကေတာ၊

VB for ApplicationVB for Excel Application

Download Zawgyi-One Font

Content (မာတကာ)CAD & Design Tools

Singapore: M&E and AutoCADRevit MEP 2010

MEP SystemsM&E Systems vs BuildingsM&E Systems ဆတာ ဘာေတြလ။Scope of M&E SystemsM&E: ေနရာ လာထားသတမတျခငးM&E န႔ Architectural ဒဇငးM&E န႔ ကနကစရတM&E Design: High-Rise BuildingsTesting & Commissioning Process

HVACHVAC: Introduction to DesignHVAC: Building in Hot & Humid ClimateM&E Basics: Pipe & Duct SizingHVAC: Duct Sizing with VBAHVAC: Duct Sizing

Automatic Control SystemsHVAC Control (01) : FCU

PlumbingSanitary Plumbing: Introduction

Domestic Water Supply: Introduction

Water Tanks ( ေရကန မား )

Swimming PoolsSwimming Pools (ေရကးကန မား)

Fire ProtectionFire Protection : IntroductionSmoke Control: Pressurization SystemsFire Sprinkler (Wet) System, S'poreျမနမာျပည ၿမေတာ ေစးမား န႔ မး ေဘးကာကြယေရး။

ElectricalElectrical Power Distribution

Sustainable, Green and EnvironmentGreen Buildings: USGBC's LEED/

   S'pore GreenMarkUnderstanding LEEDGreen EnergyClean Air: ေလေကာငးေလသန႕Clean Water: ေရေကာငးေရသန႔

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Files (personal.xls or add-in ".xla", Newer version ".xlsx")Excel VBA Object Model: Excel, Word, AutoCad ® သာမက VBA သးႏငတ Applications ေတြ မာ ObjectModel ေတြရပါတယ။ ဒါမ VBA ကေန လပေဆာငရမ၊ လပေဆာငႏငတ နညးလမးေတြ က ရာေဖြ ႏငဘ႔ပါ။Macro SecurityFunction and Sub: Sub ဆတာ ကေတာ macro အေနန႔ တကရက run လ႔ရတ processes ေတြပါ။ ပါဝငတ နညးလမးအခ႕ က modify လပဘ႔ လတ အခါ macro record လပၿပး မျငမးေလလာႏငပါတယ။ Form ေတြပါ ဒဇငးလပၿပးGraphical User Interface န႔ သးစြႏငပါတယ။ အခတငျပမာ ကေတာ ဒ Sub အေၾကာငး မဟတပါဘး။ Excel SpreadSheet ထမာ Function အေနန႔ တကရက Insert လပ သးႏငမ Function ေတြအေၾကာငးပါ။

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III. Developing Programming Flowcharts for HVAC Air-Side Circular Duct Sizing Calculations (SI Units)Cold Air Standard အတြက သးရမ Duct အရြယအစား ေရြးခယတ နညးပါ။ ဒနညး န႔ Pressure Loss က တြကထတ ရငရမ Duct Pressure Loss အေျဖက ± 5% အတြငးမာ ရပါတယ။ သ႕က သးႏငတ Conditions ေတြကေတာ။

Temperature: 5 to 35 °CElevation: 0 to 500mDuct Pressure: -5 to 5 kPa relative to ambient pressure

ဒ အေျခအေန ေတြ က ပမန HVAC အတြက လေလာကပါတယ။အမားအားျဖင Constraints ႏစခရပါတယ။ Velocity န႔ Friction Loss ပါ။ ဒါေၾကာင Duct Size လပတ အခါ Velocityကပ သးရင မားတတပါတယ။Velocity Limits ေတြ န႔ပတသကၿပး Basic Duct Sizing Consideration ေတြက M&E Basics: Pipe & Duct Sizingမာေလလာပါ။ (မတခက၊ ၊ Ducting န႔ Piping က သးသန႔ျပနခြ ဘ႔ စစဥေနပါတယ။)ပထမဆး Circular Duct Size က တြကဘ႔ Function ကေရးရပါမယ။အသးျပမ Calculation Formulae ေတြက ေတာ ASHRAE Handbook: Fundamental ထကေန မျငမးထားပါတယ။

တြကနညး အဆငဆင ကေတာ၊သတမတထားတ Velocity အတြငးဝငတ Duct Size ကတြကမယ။ဒ Duct Size န႔ တြကရင ရမ Pressure Loss ကတြကၿပး သတမတထားတ Limit အတြငးရမရ ၾကညမယ။ဝငေနတယ ဆရင အေျဖရပါၿပ။Limit အတြငး မဟတေသး ရငေတာ သတမတထားတ Pressure Loss Limit အတြငး မဝငမခငး Duct Sizeကျပနေရြး၊ ျပနတြက လပရပါမယ။

ဒ Function ကေရးတ အခါ တြကရ ပၿပးလြယ ကေအာင အက Functions ခြႏစခ ပါ ထညေရးထားပါတယ။ ဒ Functionsသးခ ေပါငးမ အလပ လပပါလမမယ။

i. DuctSize_Cir_mm : Circular Duct Size က တြကထတဘ႔ပါ။ii. DuctFrictionLoss_Pa: Circular Duct Frictioin Loss က တြကထတဘ႔ပါ။iii. f_Colebrook: Colebrook's Friction Factor က တြကထတဘ႔ပါ။

Flowcharts ေတြ က ေရးမယဆရင ဒလေတြ႕ရပါမယ။i. DuctSize_Cir_mm

Engineering ExamsUSA: EIT and FE Exam

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HVAC: Duct Sizing with VBASwimming Pools (ေရကးကန မား)

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ii. DuctFrictionLoss_Pa

iii. f_Colebrook

Circular Duct မဟတတ အျခား Duct ေတြ က သးတ အခါ အသငေတာဆး ကေတာ Equivalent Circular Duct ကရာၿပး

တြကတ နညးပါ။ HVAC Air-Side မာသးေလ ရတ Air Duct အမးအစား သးခ န႔ သကဆငတ Conversion Formula ေတြ က ေအာကမာေဖာျပထားပါတယ။

ဒ Conversion Formula ေတြ က အသးခထားတ VBA Code ေတြကပါ ထညသြငး ေဖာျပေပးမာ ျဖစပါတယ။ဒ တြကနညး ေတြ က Numerical Programming န႔တြကဘ႔ VBA Code က ေရးရပါတယ။ Excel ထက Visual BasicEditor ေအာကမာပါ။ သးသန႔ ".xla" အျဖစန႔ ထားၿပး Excel အစမာ တကဘ႔ ထားထားတ XLStart ဆတ Folder ကရာၿပးထညခငထည၊ “personal.xls” ဆတ File ထမာပ ျဖစျဖစ ထားလ႔ရပါတယ။ VBA က Macro Security Level ေပၚမတည ၿပး အလပလပခြင ေပးရပါတယ။ Powerful Operation ေတြမ႔ MacroSecurity အေၾကာငးက ေသေသခာခာ ေလလာ သရထားဘ႔ လအပပါတယ။"personal.xls" ဆတာ မရေသးရငေတာ ပထမ Record New Macro လပ၊ စာတစလး ႏစလးရက၊ ဟႏပဒႏပ လပၿပးStop Macro ကႏပ၊ ၿပးလ႔ Visual Basic Editor က ဖြငလကရင "personal.xls" တကလာတာ ေတြ႕ရပါလမမယ။

ေအာကဆး ပငး မာ Excel 2003 န႔ Excel 2007 က Screenshots အခ႕က ထညသြငး ေပးထားပါတယ။

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IV. VBA Codes for Air Duct (SI Units)Air Duct Sizing တြကခကရမာ သးနငဘ႔ အတြက VBA Functions ေတြ က ေရးထား ေပးပါတယ။ ေရးထားတFunctions ေတြ ကေတာ။

1. DuctSize_Cir_mm(Air_cmh, Optional dP_Pa = 1, Optional V_mps = 8, Optional e_mm = 0.09)Circular Duct Size က တြကထတဘ႔ပါ။

2. DuctFrictionLoss_Pa(Air_cmh, DuctDia_mm, Optional e_mm = 0.09)Circular Duct Frictioin Loss က တြကထတဘ႔ပါ။

3. f_Colebrook(e_by_D, Re)Colebrook's Friction Factor က တြကထတဘ႔ပါ။

4. DuctR2C(dH, dW)Rectangular Duct ရ Equivalent Circular Duct Diameter က ရာေပးမ Function ျဖစပါတယ။

5. DuctO2C(dH, dW)Oval Duct ရ Equivalent Circular Duct Diameter က ရာေပးမ Function ျဖစပါတယ။

6. DuctC2R(dD, Optional dH = 0)Circular Duct တစခ ရ Equivalent Rectangular Duct Dimension က ရာေပးမ Function ျဖစပါတယ။dH=0 ထားရင Square Duct က ရာေပးပါလမမယ။

7. DuctC2O_Width(dD, Optional dH = 0)Circular Duct တစခ ရ Equivalent Oval Duct Dimension က ရာေပးမ Function ျဖစပါတယ။ dH=0

ထားရငေတာ Square duct က round Duct ရထားတ အရြယအစား က ရရပါမယ။ ( ie, a = 2 * b )

8. Function DuctAirFlow_Cir_cmh(dD_mm, Optional dP_Pa = 1, Optional dV_mps = 9, Optionale_mm = 0.09)Circular Duct တစခရ Allowable Air Flow (cmh) က တြကထတဘ႔ ျဖစပါတယ။

9. DuctAirFlow_Rec_cmh(dW_mm, dH_mm, Optional dP_Pa = 1, Optional dV_mps = 9, Optionale_mm = 0.09)Rectangular Duct တစခရ Allowable Air Flow (cmh) က တြကထတဘ႔ ျဖစပါတယ။

10. DuctAirFlow_Oval_cmh(dW_mm, dH_mm, Optional dP_Pa = 1, Optional dV_mps = 9, Optionale_mm = 0.09)Oval Duct တစခရ Allowable Air Flow (cmh) က တြကထတဘ႔ ျဖစပါတယ။

Visual Basic Editor ကဖြငၿပးတ အခါ VBAProject(PERSONAL.XLS) ေအာကမာ Module တစခ က ထညသြငးၿပးကယႏစသကသလ နာမညေပး ရပါမယ။ e.g. AirDuct ၿပးရင Code ေနရာမာ ေအာကက VBA Codes ေတြက Copy &Paste လပဘ႔ပါ။ (Screenshots: No.2 က မျငမး ၾကညပါ။)

'General Section DeclarationOption Base 0 'array baseOption Compare Text Private Const atm As Double = 101.325 ' Atmospheric pressure in kPAPublic Const pi As Double = 3.14159265358979

'Function No. 01: to calculate Circular Duct SizeFunction DuctSize_Cir_mm(Air_cmh, Optional dP_Pa = 1, Optional V_mps = 8, Optional e_mm = 0.09)'Calculate Circular Duct Size, Default for 1Pa/m, 8 m/s and Medium Surface Roughness 0.09mm    Dim dV As Double, dD As Double, dA As Double    Dim dP As Double

    'calc Area which satisfy the velocity limits    dV = V_mps    dA = Air_cmh / (3600# * dV)    dD = (4 * dA / pi) ^ 0.5 * 1000

    'call function for Friction Loss    dP = DuctFrictionLoss_Pa(Air_cmh, dD, e_mm)

    If dP > dP_Pa Then        Do            'Use Power rule estimation for iteration            dD = dD * (dP / dP_Pa) ^ 0.25            dP = DuctFrictionLoss_Pa(Air_cmh, dD, e_mm)            'exit error 1%            If Abs((dP - dP_Pa) / dP_Pa) < 0.01 Then Exit Do        Loop    End If    DuctSize_Cir_mm = dDEnd Function

'Function No. 02: to calculate duct friction lossFunction DuctFrictionLoss_Pa(Air_cmh, DuctDia_mm, Optional e_mm = 0.09)    'Calculate Friction Loss    Dim dQ As Double, dD As Double 'flowrate (m3/s), diameter(mm)    Dim dV As Double, dF As Double 'velocity (m/s), friction factor    Dim dM As Double, dE As Double 'density (kg/m3), surface roughness    Dim Re As Double, dA As Double

    'For Cold Air Standard at density=1.2kg/m3    If Air_cmh * DuctDia_mm > 0 Then

        dQ = Air_cmh / 3600# 'convert air flowrate to m3/s        dD = DuctDia_mm        dM = 1.2 'kg/m3 for cold air std        dA = 0.25 * pi * (dD / 1000#) ^ 2        dV = dQ / dA 'v=Q/A        Re = 66.4 * dD * dV 'Ref ASHRAE: or use Re = V * d / nu        dF = f_Colebrook(e_mm / dD, Re)        DuctFrictionLoss_Pa = 500 * dF * dM * dV * dV / dD    Else        DuctFrictionLoss_Pa = 0    End IfEnd Function

'Function No. 03: to calculate Colebrook Friction FactorFunction f_Colebrook(e_by_D, Re) 'e_by_D Relative roughness; Dh: Hydraulic Dia, Re: Reynold number    'Calculate Colebrook friction Factor

    Dim f As Double, root_f As Double, root_f1 As Double

    'Start with Tsal's estimation    f = 0.11 * (e_by_D + 68 / Re) ^ 0.25    If f < 0.018 Then        f = 0.85 * f + 0.0028    End If

    root_f = f ^ 0.5    Do        root_f1 = -0.5 * Log(10) / Log(e_by_D / 3.7 + 2.51 / (root_f * Re))        'check if error is less than 0.5%        If Abs((root_f1 - root_f) / root_f) < 0.005 Then Exit Do        root_f = 0.5 * (root_f + root_f1) 'Use binary approach iteration    Loop    f_Colebrook = root_f ^ 2End Function

'Function No. 04: Equivalent Circular Duct Size of a Rectangular DuctFunction DuctR2C(dH, dW) As Double    'Rectangular Duct to Circular Duct    If dW * dH > 0 Then        DuctR2C = 1.3 * ((dH * dW) ^ 0.625) / ((dH + dW) ^ 0.25)    Else        DuctR2C = 0    End IfEnd Function

'Function No. 05: Equivalent Circular Duct Size of an Oval DuctFunction DuctO2C(dH, dW) As Double    'Oval Duct to Circular Duct    Dim dA As Double, P As Double    If dW * dH > 0 Then        dA = (pi * dH ^ 2 / 4) + dH * (dW - dH)        P = pi * dH + 2 * (dW - dH)        DuctO2C = 1.55 * (dA ^ 0.625) / (P ^ 0.25)    Else        DuctO2C = 0    End IfEnd Function

'Function No. 06: Equivalent Rectangular Duct Dimension of a Circular Duct

Function DuctC2R(dD, Optional dH = 0) As Double    'Circular Duct to Rectangular Duct    'if Dimension (dH) is zero, square duct    'dH could be either dimension: "Width" or "Height"    Dim dW As Double, dW1 As Double    Dim dD1 As Double

    If dH > 0 Then        'Estimate dH        dW = 0.25 * pi * dD * dD / dH        Do            dD1 = 1.3 * ((dH * dW) ^ 0.625) / ((dH + dW) ^ 0.25)            dW = dW * (dD / dD1) ^ 2            If Abs((dD1 - dD) / dD) < 0.005 Then Exit Do        Loop    Else        dW = dD * 0.9148    End If    DuctC2R = dWEnd Function

'Function No. 07: Equivalent Oval Duct Dimension of a Circular Duct Function DuctC2O_Width(dD, Optional dH = 0) As Double    'Circular Duct to Rectangular Duct    'if Dimension (dH) is zero, square duct + round, ie, a = 2 * b    'dH is dimension b for "Height", dW is dimension a for "Width"    'As nature, dH < dD    Dim dW As Double, dW1 As Double    Dim dD1 As Double    Dim dA As Double, P As Double

   If dH > 0 Then        'Estimate dH        dW = 0.25 * pi * (dD * dD - dH * dH) / dH        Do            dA = (pi * dH ^ 2 / 4) + dH * (dW - dH)            P = pi * dH + 2 * (dW - dH)            dD1 = 1.55 * (dA ^ 0.625) / (P ^ 0.25)            dW = dW * (dD / dD1) ^ 2            If Abs((dD1 - dD) / dD) < 0.005 Then Exit Do        Loop    Else        dW = dD / 1.5234    End If    DuctC2O_Width = dWEnd Function

'Function No. 08: To Calculate Allowable Air Flow from a Circular Duct.Function DuctAirFlow_Cir_cmh(dD_mm, Optional dP_Pa = 1, Optional dV_mps = 9, Optional e_mm = 0.09)    Dim cmh As Double, dP As Double    Dim dD As Double, dV As Double

    dV = dV_mps    dD = dD_mm    cmh = 0.0009 * pi * dD * dD * dV '0.0009 <- 0.25*3600/1000000    dP = DuctFrictionLoss_Pa(cmh, dD, e_mm)    If dP > dP_Pa Then        Do            dV = dV * (dP_Pa / dP) ^ 0.5            cmh = 0.0009 * pi * dD * dD * dV            dP = DuctFrictionLoss_Pa(cmh, dD, e_mm)

            If Abs(dP - dP_Pa) / dP_Pa < 0.01 Then Exit Do        Loop    End If    DuctAirFlow_Cir_cmh = cmhEnd Function

'Function No. 09: To Calculate Allowable Air Flow from a Rectangular Duct.Function DuctAirFlow_Rec_cmh(dW_mm, dH_mm, Optional dP_Pa = 1, Optional dV_mps = 9, Optionale_mm = 0.09)    Dim dD As Double, dV As Double    dV = dV_mps    dD = DuctR2C(dW_mm, dH_mm)    DuctAirFlow_Rec_cmh = DuctAirFlow_Cir_cmh(dD, dP_Pa, dV_mps, e_mm)End Function

'Function No. 10: To Calculate Allowable Air Flow from an Oval Duct.Function DuctAirFlow_Oval_cmh(dW_mm, dH_mm, Optional dP_Pa = 1, Optional dV_mps = 9, Optionale_mm = 0.09)    Dim dD As Double, dV As Double    dV = dV_mps    dD = DuctO2C(dW_mm, dH_mm)    DuctAirFlow_Oval_cmh = DuctAirFlow_Cir_cmh(dD, dP_Pa, dV_mps, e_mm)End Function

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V. Screenshots: Adding VBA Codes in Excel Excel 2002-2003 (or Earlier)

Screenshot No. 1: နမနာ အေနန႔ Microsoft Excel 2002-2003 မာဆရငေတာ ဒလေတြ႕ရပါလမမယ။

Screenshot No. 2: Visual Basic Editor ဆတာ က ႏပလကရင ေအာကက ပစ ေပၚလာပါလမမယ။ အထမာ VBACode ေတြ က ကးယၿပးရင ဒလ ေတြ႔ႏငပါတယ။

Excel 2007Screenshot No. 3: 2007 အထက ဆရငေတာ Tools အစား Developer Tab အေနန႔ ဝငလာပါတယ။

Screenshot No. 4: တစခါတစရ Developer Tab က ေဖာက ထားတတပါေသးတယ။ ဒါဆရင ေတာ excel optionေအာကကေန သြားရာ ရပါလမမယ။ (မေသခာ ရင Help မာ ရာၾကညပါ။)

Screenshot No. 5:

အထကမာ ေျပာခတ အတငး VBA က Macro Security Level ေပၚမတည ၿပး အလပလပခြင ေပးရပါတယ။ PowerfulOperation ေတြမ႔ Macro Security အေၾကာငးက ေသေသခာခာ ေလလာ သရထားဘ႔ လအပပါတယ။ Screenshot No.6:

Screenshot No. 7:Developer Tab ေအာက က Code ေနရာ မာ လညး Macro Security ဆတာ ရပါတယ။ ထြကလာမScreen ကေတာ။

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VI. Screenshots: Use of VBA Functions in Excel Worksheetၿပးရငေတာ ဒ Function ေတြက Excel Spreadsheet မာ အသငသးႏငပါၿပ။ပထမ Insert function ကသြားၿပး select a category မာ User Defined ကေရြးလကရင ဒ Function ေတြေပၚလာပါလမမယ။

ၿပးရငေတာ Excel Formula သးေနက အတငးသးရပါပ။

ဒအထ မာ Air_cmh ဆတ ကြကလပကေတာ ျဖညက ျဖညရပါမယ။ အျခား ကြကလပေတြ က Function မာထ ကOptional အေနန႔ ေရြးၿပး Assign လပထားတာမ႔ မျဖညလညး ရပါတယ။ Assigned လပခတ value ေတြကေတာအသးမားတ

dP_Pa = 1V_mps = 8E_mm = 0.09

ၿပး Excel Style: Drag-Coppy လပလကရင ရမ အေျဖကေတာ၊

ဒကရတ အေျဖက Chart ကေနၾကညလ႔ ရတ အေျဖန႔ အတတေလာကပါပ။ တကယ အေသးစတ တြကလ႔ ရမ အေျဖရ ±1% အတြငးမာ ရတာမ႔ safety factor ထညယေလရတ အငဂငနယာ ေတြအတြက လေလာကပါတယ။မတခက။ ။ Excel Calculation Sheet File ေတြ က အျခားသေတြ ဆ ပ႔ေပးရတ အခါမာေတာ ဒ Function VBA Codesေတြ အဒ file ထမာ မပါရင အလပလပ မာ မဟတပါဘး။ အရငးဆး နညးလမးကေတာ Function VBA Codes ေတြထညမေပး ပ Function ေတြ န႔တြက ၿပး ရလာတ အေျဖ ရတ Cell ေတြက အေျဖ က Copy ကး၊ ၿပး Paste Special မာvalues က ေရြးၿပး ျပနထညလကပါ။ Chart ၾကညၿပး Manually ရကထည ထားသလ မးေပါ။

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VII. Html Color Coding by VBAအေပၚက VBA code ေတြမာ အေရာငေတြ ခြေပးထားတာ က လညး VBA က သးၿပး html format က ေပးထားလ႔ပါ။ဒါကေတာ MS Word ေအာကမာ ေရးၿပးသးပါတယ။ အပ သပမပါပ ရငးရငးလငးလငး ျမငရေအာင format လပဘ႔က htmlမာ သပ မလြယက လပါဘး။ အခနလညး အရမးကနပါတယ။ သ႕ရ VBA Code ကေတာ ရႈတေထြးတာ မ႔ မေဖာျပေတာပါဘး။

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VIII. References1. "Duct Design", Chapter 21, ASHRAE Handbook: Fundamentals, 2009.2. Visual Basic for Applications 3. Using Flow Chart - Flowcharting[ http://www.nos.org/htm/basic2.htm ]4. HVAC Duct Sizing[ http://chawlwin.blogspot.com/2009/07/hvac-duct-sizing.html ]

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Disclaimer

Programming န႔ သးလ႔ရတယ ဆတာ က မတဆက ေပးခင လ႔ပါ။ ၿပးေတာ အခနကန သကသာ ေစခငတာလညး ပါပါတယ။ အတတႏငဆး ႀကးစားထားေပမ အမား လးဝကငးပါတယ လ႔ အာမ မခႏငပါဘး။ စာဖတသ ကယတင သးစြၿပး ၾကညၿပး အေျဖမန ေပးႏငေၾကာငး ေသခာမ သးစြပါလ႔ အသေပးလပါတယ။

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Posted by Ko Chaw - ကေခာ at 9:53 PM

Labels: HVAC, MEP Design, VBA

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