COMPUTERIZED FLUID DYNAMICS (CFD) CAPABILITIES OFrbs-engineers.com/COMPANY PROFILE 2019/RBSANCHEZ INC CFD... · 2020-03-06 · computerized fluid dynamics (cfd) capabilities of rbsanchez

COMPUTERIZED FLUID DYNAMICS (CFD)CAPABILITIES OF

RBSANCHEZ PME CONSULTANTS

& ASSOCIATES, INC.

3/6/2020www.rbs-engineers.com

PRESENTED BY:

ENGR. ROSEN B. SANCHEZU.P. BSME 1980, PME, ASEAN, ACPE PSME ENGR

CFD is not yet COMMONLY USED in the Philippines.

But it is already a common,useful and PROVEN technologyabroad.

i.e. RBS CFD on BURJ KHALIFA TOWER

2

PHILIPPINE SITUATIONER

Actual CFD Simulations

by

RBSANCHEZ PME CONSULTANTS & ASSOCIATES, INC.

RBSanchez PME Consultants and Associates Inc.36th Flr. Makati Executive Tower 2 Cor. Dela Rosa St. Makati. Website: www.rbs-engineers.com

CFD Simulation and Analysis of

Sedimentation Basin Channels 1

and 2 of Balara Treatment Plant 1

Preliminary Report Discussion

January 29, 2020

CFD Simulation and Analysis of Sedimentation Basin Channels 1 and

2 of Balara Treatment Plant 1

BACKGROUND

CFD CASE SETUP - SIMULATION

Solids Fraction

Run until 14400 seconds*

CFD CASE SETUP – 3D FULL SCALE SIMULATION

Sludge concentration (solids fraction)

An operational issue is observed as accumulation takes place along the

entire basin.

- A concentration and compression gradient will form as the sludge bed

develops.

- The earlier settled sludge would increase and compress becoming

more rigid as the sludge bed progresses along the basin floor.

If sludge removal is operated after a considerable settling time, similar

results of stagnation from rigid sludge bed would be expected making the

removal system more difficult.

CFD CASE SETUP - SIMULATION

Solids Fraction

Run until 7200 seconds*

Sludge removal started after

7200s accumulation time

Solids Fraction

Similar problems are observed

even at reduced slopes and

shortened distance from sump

pit. Although steeper slopes

have been observed to cause

sludge transport to improve,

the problem of sludge

stagnation remains.

(3D full scale simulation to

verify)

*to avoid sludge increased

rigidity

Actual CFD Simulations performed to date

FESTIVAL EXPANSION

SUPERMALLAlabang, Muntinlupa

A 5,400 CTonCOOLING TOWER

NEW FESTIVAL SUPER MALL

FESTIVAL EXPANSION

SUPERMALL

5,400 TON COOLING TOWERS OPTION 1 – SINGLE LINE TOWERS

ORIENTATION – 90 deg against the WIND

WIND DIRECTON

5,400 TON COOLING TOWERS OPTION 2 – SEPARATED TOWERS

ORIENTATION – 90 deg against the WIND

WIND DIRECTON


ORIENTATION – 0 deg to the WIND

WIND DIRECTON


ORIENTATION – 90 deg with the WIND

FESTIVAL EXPANSION

SUPERMALL

“AS DESIGNED” CFD RUN ON COOLING TOWERS


Presentation of Results SEPARATED TOWERS






Presentation of Results COMBINED / SINGLE FILE TOWERS




RESULTS: OPTION 3 IS THE BEST!

WIND DIRECTON

Presentation of Resul

Design and consultancy services for the redesign of all eleven (11) MSSC offices occupied at RCBC Plaza.

DESIGN AND CONSULTANCY FOR CHEVRON MSSC HVAC UPGRADE & REHABILITATION

RCBC Plaza, Makati, Manila

System rectifications and rebalancing to attain comfortable space conditions. Redesign of all floors include the improvement in operations and utilization of current resources.

Resolve the hot and cold spots over the floors, temperature gradient.

Computerized Fluid Dynamics(CFD) Studies Of Zama Precision

Die-casting Lines

by

RBSANCHEZ PME CONSULTANTS & ASSOCIATES, INC.

06/03/202024RBSanchez PME Consultants

CFD SIMULATION

CFD PRESENTATION OF CFD PRESENTATION OF


ADDITIONAL UPPER VENTSENLARGE LOWER VENTSTO FOLLOWNATURAL BOUYANCY LAWS

CFD PRESENTATION OF CFD PRESENTATION OF

PROPOSED

SETUP


TAKE ADVANTAGE OF NATURAL WIND DRIVEN CROSS VENTILATION


We recommend “CROSS FLOW AIR VENTILATION” at the faciltyto take advantage of natural wind power


2.0 NO “CROSS FLOW AIR VENTILATION” AT THE NORTHERN SIDE OF THE FACILITY. Current velocity measurements show that the air is ony recirculating“plan-wise” (and not exhausting) across the building in the northern side of the building near the furnaces.

All lower intake louvers including doors also have air inflows only and NEVER cross-ventilates.


READINGS OF LOCAL VENTILATION PM2.5 PARTICLE CONCENTRATIONS

NO “CROSS FLOW AIR VENTILATION”


Current “FORCED FLOW AIR VENTILATION” at the facilityuses Mechanical power to exhaust only 103,000 cfm


We recommend “CROSS FLOW AIR VENTILATION” at the faciltyto take advantage of natural wind power @ 322,900 cfm.


3.0 PARTICLE ACCUMULATION ALSO OCCURS AT GROUND LEVEL OUTSIDE THE BUILDING AT THE NORTHEASTERN SIDE.Outside the building, the gaseous particles on the rooftop tends to fall due to layout of the fans relative to the roof and the gooseneck exhaust design. Exhaust and particles must be vented to the atmosphere and thrown at high levels for proper dispersion. Particle readings show higher levels of PM2.5 matter in this area(705 ug/m3) in the ground level especially when exhaust of furnaces are working compared to other surrounding areas.



LOCAL EXHAUSTS VENTILATION SCHEMES w/ CFD RUNS

PUSH-PULL

LOCAL

OPTION


LOCAL EXHAUSTS VENTILATION SCHEMES w/ CFD RUNS

PUSH-PULL

LOCAL

OPTION


5.0 COMMENT ON THE PROPOSAL TO COMPLETELY INSULATE THE FACILITY TO REDUCE INTERNAL TEMPERATURES. We were told to comment on the proposed insulation of the facility. We don’t recommend these altogether if it is for forlowering of the internal temperatures. It will only cost money, time, and space and increase the internal temperatures.

We don’t recommend using 150mm thermal insulation to reduce internal working temperatures.

We recommend high “solar reflectance” radiant barriers coupled with “air/ insulation” technologies.

OTHER CASE STUDIES:

❖ Naturally Ventilated Building

❖ A kitchen Comfort and Hood Exhaust Design (Jollibee Samples)

❖ CarPark Natural Ventilation

CASE STUDIES and CFD to be shown:

❖ An Underground Road Tunnel design for oxygen, CAR fire scenario, and CO and CO2 levels.

TAGAYTAY HIGHLANDSSAMPLE FOR “GREEN”NATURAL VENTILATION

TAGAYTAY HIGHLANDS

TAGAYTAY HIGHLANDSCFD FOR NATURAL VENTILATION

TAGAYTAY HIGHLANDSMETROPOLIS MALL

CFD FOR NATURAL VENTILATION

TAGAYTAY HIGHLANDSNATURAL VENTILATION

UNDER ROOF SOLAR SHIELD

13MM HOT AIR GAP

HUGE SOLAR CAP COVER

CROSS FLOW OF AIR

HIGH RIDGE VENTS

SUPERMALL – UNDERGROUNDCARPARK TUNNEL

THESE CASES WE SHALL SHOW and PERFORM on actual software:

❖ Naturally Ventilated Building

❖ A kitchen Comfort and Hood Exhaust Design

❖ CarPark Natural Ventilation

Presentation of Results

CFD is a tool to even a better design!

ADDITIONAL CASE:A CFD Simulation

STARMALL ALABANGAlabang, Muntinlupa

A Special Request by our Chairman Mon Aguilos:

STARMALL ALABANG

A 3,600 Ton MallAlabang, Muntinlupa

METROPOLIS CFD APPROACH: PRINCIPLES OF

NATURAL VENTILATION

The Opening up on the Glass facade of Building to accommodate and act as a wind catcher intake.

A 3,600 Ton METROPOLIS MALL

AIR CAVERN CATCHERCFD FOR NATURAL VENTILATION

ACTUAL MAPCFD FOR NATURAL VENTILATION

PRINCIPLES OFNATURAL VENTILATION



The use of spent cool air from the three lower floors to be released upward to assist in cooling the natural ventilation of the 4th and 5th floors.

METROPOLIS MALLCFD FOR NATURAL VENTILATION

SPENT AIR


The use of the now shuttered / open up the main hallways and corridors to serve as exit and entry of wind driven air.


The design and provision (for occasional use during humid months:) of swimming pool fountain as a chilled water curtain AIR DEHUMIDIFIER during hot and humid days to dry incoming air of Building in the

wind catcher intake.


Estiamnted in Two (2) to 3 Months (3) of a year, the wind will be too hot and humid, and we need cooling assistance from chilled water.



The design of the Roof Apex or topmost Roof Ridge as Wind-driven cross ventilation , where natural wind will push and suck out the roof level hot air.



The Design of the side ridge vents on both sides of roof as cool air intake and air exhaust from wind driven air and natural forces to cool the roof.



The use and application of a thin film specially specified for 99% solar reflection from the roof.

To minimize heat energy as it was observed by our engineers that radiant heat from underside of roofs is very high.


The strategic design and use of Spent Air and/or transfer air from cinemas to assist in cooling the natural ventilation of the 4th and 5th floors.


TO USE the very hot south front wall as a SOLAR CHIMNEY as the MAIN EXHAUST of hot air from the building

NATURAL VENTILATION is GREEN and SUSAINABLE!

The above approaches were discussed in the meetings held.

All these components were to work SYNERGISTICALLY as a NATURAL VENTILATION SYSTEM to give a cooler building WITHOUT USING ANY AIRCON EQUIPMENT

NATURAL VENTILATION is GREEN and SUSAINABLE!

TO PROVE THIS SYSTEM, YOU HAVE TO RUN THE CFDS FOR THE WIND-DRIVEN DESIGN.

HAVE TO GET SITE WIND DATA, AND FINALLY VERIFY THE CFD MODEL BY TAKING MEASUREMENTS.



DEMO OF CFD WIND DRIVEN MODEL





Actual CFD Simulations

CFD FOR FLUE GAS MODELLING

OF

SHELL REFINERY IN TABANGAO, BATANGAS

Done by RBS ASSOCIATE

ENGR FRANCISCO AMARRA

CFD FOR REFINERY GAS EMISSIONS

SO2 & NOx Ground LevelConcentrations from Stack Emissions

In Shell Tabangao Refinery

Objectives of Study:

1. Determine ground level concentrations at Shell

Tabangao Refinery from September 2001 to

August 2002.

2. Study availability and quality of raw data

3. Develop methodology to be able to apply

AERMOD using local data

4. Assess applicability of AERMOD for the

Philippines using available data

Importance of Study:

• EMB – appreciation of the benefits that can be derived

at from AERMOD

• PAGASA – adapt and make available the surface and

upper air climate data format required for the successful

application of AERMOD

• NAMRIA – make available terrain data in USGS-DEM

format

• Model Users – awareness in the benefits and pitfalls in

the application of AERMOD for the Philippines

• Other readers – appreciation on the benefits of air

dispersion modeling, in general, and how this can help in

the proper management of our environment

Review of Literature:

• Philippine Clean Air Act

• Pollutants from Stack Emissions

o Effects of SO2

o Effects of NOx

• Meteorological Effects on Air Dispersion

• Terrain Effects on Air Dispersion

• AERMOD Program

o Meteorological Pre-processor

o Terrain Pre-processor

• Other recommended models

Study Area:

• Shell Tabangao Refinery

• Location

• Background history

• Process Description

• Emission Sources

• Combustion Fuels

Downloaded DOS version

program.

Studied the AERMOD

Program together with

AERMET

Deciphered the data

formats used in AERMET

Sourced surface

climatological data

from PAGASA

Reformatted

climatological data

from PAGASA

Tested validity of format by

running AERMET pre-

processor

Sourced upper air

data from PAGASA

Sourced terrain data from

UP-NIGS

Converted terrain data to

USGS-DEM format.

Run AERMAP to validate

terrain data

Run AERMOD with inputs

from AERMET and

AERMAP.

Applied to both SO2 and

NOx pollutants

Overlaid aerial map to show

contours of pollution spread

in large scale perspective

Overlaid aerial map to show

contours of pollution spread

in small scale perspective.

Deciphered the data

formats used in AERMAP

Methodology:

Input Data Required for AERMOD:

• Control Pathway

–Averaging Time, Pollutant type

• Source Pathway

–Point Sources ID and Location (x, y, z)

–Dimensions: stack height, diameter

• Emission Data

–Emission rate, stack gas temperature, gas velocity

• Receptor

–Large scale and small scale networks (locations)

Input Data Required for AERMOD:

•Meteorological Pathways–Site data for surface climate & upper air stations–Study site data

•Surface Parameters–Albedo, Bowen ratio, surface roughness

•AERMAP–Terrain files converted to USGS-DEM format

•AERMET–Raw data: Surface Climate Surface File–Raw data: Upper Air Profile File

Results: SO2 Concentrations

Se

p-0

1

No

v-0

1

De

c-0

1

Ja

n-0

2

Fe

b-0

2

Ma

r-0

2

Ap

r-0

2

Ma

y-0

2

Ju

n-0

2

Ju

l-0

2

Au

g-0

2

Ye

ar

Ave

.

Re

g. L

imit

Monthly

24-hour

0

20

40

60

80

100

120

140

160

180

ug

/NC

M

Emission

Sources:

Gas Turbines

CDU/STAR

Platformer

Months

Results: NOx Concentrations

Sep-0

1

Nov-0

1

Dec-0

1

Jan-0

2

Feb-0

2

Mar-

02

Apr-

02

May-0

2

Jun-0

2

Jul-02

Aug-0

2

Year

Ave.

Reg. Lim

it

Monthly

24-hour

0

20

40

60

80

100

120

140

160

ug

/NC

M

Emission

Sources:

Gas Turbines

CDU/STAR

Platformer

Months

Conclusion:

1. Shell Tabangao Refinery emission

concentrations were below the regulatory

limits for the period September 2001 to

August 2002.

2. Problems were encountered during acquisition of

raw data

– Surface climate data not in the required format

– Upper air climate data not always available

due to budget limitations

– Terrain data is not readily available and

expensive to produce

CONCLUSION

3. Conversion of raw data was successful.

AERMOD Program is applicable in the

Philippines and it was successfully

applied using Shell Tabangao Refinery

data

Recommendations:

• Air Dispersion Models – EMB should focus on

encouraging industries to make use of air modeling

programs;

• Surface and Upper Air Climatological Data – bring up-

to-date all encoding requirements for surface data and

convert to CD-144 format; include encoding of upper air

data into the CLICOM system and convert to TD-6201

format;

• Terrain Data – NAMRIA should develop digitized maps

in USGS-DEM format.

PollutantsShort Terma Long Termb

μg/NCM ppmAveraging Time

μg/NCM ppmAveraging Time

Suspended particulate Matterc –

TSPPM-10

230d

150f

24 hours24 hours

9060

1 yeare

1 yeare

Sulfur Dioxidec 180 0.0724

hours80 0.03 1 year

Nitrogen Dioxide 150 0.0824

hours

Photochemical Oxidants as Ozone

14060

0.070.03

1 hour8 hours

Carbon Monoxide35 mg/NCM10 mg/NCM

309

1 hour8 hours

Leadg 1.53

monthsg 1.0 1 year

Sea Breeze

WARM AIR

COOL AIR

DAYTIME

CONDITIONS

Land Breeze

COOLER AIR

WARMER AIR

NIGHTTIME

CONDITIONS

(Land cools faster)

Surface

Climate

Data

AERMAP

PreprocessorDEM File

Profile

File

AERMOD

Surface

File

AERMET

Preprocessor

On-Site

Upper Air

Data

Data

Output

From US-

NWS

From US-

NWS

From

USGS

Column Element

1-5 Surface Station Number

6-7 Year

8-9 Month

10-11 Day

12-13 Hour

14-16 Ceiling Height (Hundreds of Feet)

17-18 Wind Direction (Tens of Degrees)

19-21 Wind Speed (Knots)

22-24 Dry Bulb Temperature (Degrees Centigrade)

25-26 Total Cloud Cover

27-28 Opaque Cloud Cover

SurfaceDataFormatDescription

Column Element

1-8 Station Identification

9-12 Latitude

13 Latitude Code N/S

14-18 Longitude

19 Longitude Code E/W

20-29 Date and Time (Yr/Mo/Dy/Hr)

30-32 Number of Data Portion Groups thatFollow

33 Level Quality Indicator

34-37 Time (elapsed time since release)

38-42 Pressure

43-48 Height

49-52 Temperature

53-55 Relative Humidity

56-58 Wind Direction

59-61 Wind Speed

62-67 Flag Field (Quality Flags)

68 Type of Level

Upper AirFile FormatDescription

GAS &

LIQUID

TREATING

MIDDLE

DISTILLATE

HYDRODE-

SULPHURIZER

SULPHUR

RECOVERY

UNIT

THERMAL

CRACKER

CAT

REFORMER

LPG PLANTNAPTHA

HYDRO-

TREATER

CRUDE

DISTILLER

NAPHTHA

GASOLINE

COMPONENT

DIESEL

AVTUR/KEROSENE

FUEL OIL

SULPHUR

LPG

FUEL OIL

Daily Synopsis

(compiled monthly)

Climatological &

Agrometeorological

Branch (CAB)

Quality Control of

Data Input

Approved DataAverage Daily and

Monthly Report

Computer/CLICOM

Available for public

reference

Parameter From CAB Required by AERMOD/SCRAM

Conversion

Hour 3-hourly reading 1-hourly reading Copy missing hour data from the first hour

Ceiling Height Meters Hundred feet M x 3.28/100

Wind Direction Degrees Tens of Degrees Degrees/10

Wind Speed Meters/second Knots M/s x ___

Dry Bulb Temp. ºC ºC Not Applicable

Total Cloud Cover1 Okta % (x 10) Okta to %8 = “-“7 = “8”6 = “7”5 = “6”4 = “5”3 = “4”2 = “3”1 = “2”0 = “1”

Opaque Cloud Cover1 Okta % (x 10) Readings shall be less or equal to Total Cloud Cover depending on specific type(s) of clouds present.

Note: 1Total Cloud Cover = Opaque + Transparent [35].

SurfaceDataConversionGuidelines

120ºE 126ºE

UTM Coordinates: Zone 51N291300m East, 151700m North

Zone 51

ShellTabangaoRefinery

BatangasCity

CFD IN ACTION

3/6/2020WWW.RBS-ENGINEERS.COM 104

OPEN FORUM

QUESTION & ANSWER

Why USE CApplication of CFD in ACCUS

AIR COOLED CONDENSER STUDIES

RBSanchez PME Consultants and Associates Inc.36th Flr. Makati Executive Tower 2 Cor. Dela Rosa St. Makati. Website: www.rbs-engineers.com

RBS RESOURCES for

CFD Simulation

Personnel

Equipment

Servers

Instruments and tools

DREXLER G. DELA TORRE, ME

Bachelor of Science in Mechanical Engineering, BSME

St. Louis University, Baguio (2018)

Graduated “CUM LAUDE”

“3rd PLACER” - PRC Mechanical Board Exams 2018

MECHANICAL ENGINEER

NICK JOHNSONN B. FERNANDEZ, ME

Bachelor of Science in Mechanical Engineering, President Ramon Magsaysay State University – Iba Campus (2018)

PRC Mechanical Board Exams 2018

“12th PLACE”

MECHANICAL ENGINEER

JOSEPH RENE C. OMANDAC, ME

Bachelor of Science in Mechanical Engineering, Mapua University-

Cum Laude and Gold Medalist

PRC Mechanical Board Exams 2019

“6th PLACER” (August 2019)

MECHANICAL ENGINEER

RESOURCE/OFFICES:

With complete Personnel Support and resources for:

1. AutoCAD Drafting and Large format Plotting

2. Complete Engineering softwares (with license): Elite

Duct Size 3.0, PsychartHD 7.4, Flite FluidFlow Pipe and

Duct Ver 3.0., ASHRAE Fundamentals 2013, Trace 700

Cooling Load, CHVAC Heat Load, PipeSizer, AutoCAD

Suite 2013, Cloud computing, OpenFOAM, FDS,

COMSOL, ANSYS Fluent

3. Dedicated FTP site for large file transfer

SUPERCOMPUTERSHEWLETT PACKARD PROLIANT DL 380 SERVERS2 UNITS w/ XEON DOUBLE PROCESSORS32 CORES 3MHZ XEON

RBS EQUIPMENT USED: SAMPLE TESTING AND MEASUREMENT PRECISION INSTRUMENTS

THANK YOU!


REFERENCES


Documents

COMPUTERIZED FLUID DYNAMICS (CFD) CAPABILITIES OFrbs-engineers.com/COMPANY PROFILE 2019/RBSANCHEZ INC CFD... · 2020-03-06 · computerized fluid dynamics (cfd) capabilities of rbsanchez