Adkadam Cfd Fire

8/3/2019 Adkadam Cfd Fire

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CFD: Ventilation and Fire Scenario

Ashish Kadam


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1. Building, as one of the largest industries, has significant impacts on theenvironment and natural resources.

.

all the electricity consumption.


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Poor design of buildings and systems

not only wastes resources and energy

and causes adverse impacts to the

environment, but also creates

uncomfortable and unhealthy indoor

environments.

Smoky View of Pune city


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Thermal

comfort

Ventilation

Energy

ConsumptionFire & Smoke


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Predicts HeatTransfer

Avoid

Over sizing &

Under sizing

Improved

Thermal Comfort

Improved Work

ene s o

CFD Predicts Airflow

Contaminant

Transportation

Avoids all Post

Commissioning

Embarrassments!!

Saves

Environment

!!Green Design!!


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Client

Consultants


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CFD is study of fluid systems that could be static or

dynamically changing in time and space.

The physical characteristics of a fluid in motion, described

usually in the partial differential form.

These equations are discretized using high end computer

algorithms.


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Applications of CFD

1. Site Planning

2. Natural Ventilation Study

3. HVAC System Design

4. Pollution Dispersion and Control5. Fire and Smoke Evacuation Studies

6. Simulation of Emergency Situations


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Site Planning: First Stage of Building Design

Predicts

Distribution of air velocity,

Temperature, Moisture, Turbulence intensity & Contaminant concentration

Benefits

Improves Pediatrician comfort Increase energy efficiency of buildings Plan: natural ventilation for summer Plan: wind break for winter


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Natural Ventilation System


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Fire and Smoke Simulation

Kitchen exhaust


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Limits for Critical Parameters


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CFD examines

1. Locations and Types: Supply and Return

Grills/Diffusers etc.

.

3. System control schedules

4. Active & Passive heating/cooling/ventilation

strategies


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Boundary Conditions: Free Standing Fire


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Case Study: Fire Simulation

Test room of size:

10.78 m x 7 m x 3.8 m


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Tenability Criteria in Fire Scenario

Room becomes untenable if any of the following occurs


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Visible Smoke Spreading after 30 sec


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Flashover after 60 sec in ignition


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Visibility lost after 90 sec


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Comparison: Experimental vs FDS Model


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Temperature at 1.5 m above the floor after 90 sec


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Oxygen volume fraction at 1.5 m above floor after 90 sec


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Thank you

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Adkadam Cfd Fire