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VIRTUAL LABwww.iitg.vlab.co.inoverviewVirtual lab is a series of hands-on experiments and demonstrations using a simulated laboratory based on the software lab view.

In other words it refers to a category of software solutions to automate our general labs using virtualization technology.

Our aim here is to provide remote-access to some of the general Chemical Engineering labs for catering the needs of students at the undergraduate level, post graduate level as well as to research scholars. We with our experts try to dispel some common virtualization misconceptions, including the idea that virtualization guarantees improved understanding.

Through it we can also share or have a feel of costly equipment and resources, which are otherwise available to limited number of users due to constraints on time and geographical distances.

It allows the user to select their own input values and manipulate them in a manner that resembles that of a real lab .Real lab overviewLearn standard practicesFamiliarity with the equipmentPractice with concepts taught in lectureApply the scientific method

But it requires :Money ManpowerTime Resources

Real experiments can be done for limited no. of time due to money and manpower constraints.

Advantages of Virtual LabVirtual lab gives us more ability to be creative without being restricted by resources or safety concerns.

Virtual lab syllabus can be designed to meet the needs of the class.

Users can repeat virtual experiments for practice or developing conceptual understanding.

Users can carry out experiments virtually when equipments are not available and understand their basic operation and performance characteristics.

To carry out experiments on setups that are costly to fabricate and that are not existent in the regular chemical engineering practice.

Various approaches comprise of a single module:

Simulations Using measurement data from experimentsInteractive animationsExciting quizzesAdditional web-resourcesExperimental Video-lectures Labview VideosSelf evaluation.

Presently we have 9 modules in running mode:

Column tray efficiencyFlow through porous mediaWater cooling towerForced draft tray dryerMass transfer with or without chemical reactionVapor in air diffusionBinary vapor liquid equilibriumDesign of binary distillation columnRotary dryerExperiment no. 1

AIMTo study the operation of a batch rectification column under constant or total reflux conditions.

Experimental setupTHEORYIn a batch rectification setup vapors generated in the kettle pass up the column counter currently to the liquid that is passing down the column .

The column packing provides a good contact between the liquid and the vapor.

As liquid passes up the column , it comes in contact with thin film of liquid formed around the packing surface.Animation SHOWING A SINGLE TRAY OF A DISTILLATION COLUMNAnimation SHOWING THE SETUP

VIRTUAL EXPERIMENT

CoNCLUSIONS & RESULTS

Experiment no. 2

THEORYA membrane is a layer of material that serves as a selective barrier between two phases and remains impermeable to specific particles , molecules or substances when exposed to the action of driving force.

Knudsen Diffusion and Solution diffusion are prominent mechanisms.

Knudsen diffusion is a means of diffusion that occurs in a long pore with a narrow diameter (250nm) because molecules frequently collide with the pore wall.

The transport of gases through dense (nonporous) polymer membrane occurs by a solution diffusion mechanism.Animation SHOWING THE SETUPProcedure 1

Procedure 2

CoNCLUSIONS & RESULTS

Experiment no. 3

ObjectiveTo study the heat & mass transfer operation in Water Cooling Tower for different flow & thermodynamic conditions.aimTo determine the overall heat transfer coefficient in a forced draft counter current cooling tower.

2. To measure Tower Characteristic parameter KV/L for various liquid and air flow rates (L/G) in a counter-current Forced draft Cooling Tower.ANIMATION SHOWING THE COOLING TOWERCoNCLUSIONS & RESULTS

Where H - enthalpy , Q - volumetric flow rate , KV/L tower characteristic parameter Experiment no. 4

INTRODUCTIONDrying of solids is considered to occur in two stages ,

a constant rate period a falling rate period.

In the constant rate period the rate of drying corresponds to the removal of water from the surface of solid.

The falling rate period corresponds to the removal of water from the interior of the solid.

The rate in either case is dependent on flow rate of air, the solid characteristics, tray material. ANIMATION DESCRIBING THE PROCESSVirtual experiment

CoNCLUSIONS & RESULTS

Experiment no. 5

OBJECTIVE1.To Study the dissolution of benzoic acid in aqueous NaOH solution.

2.To Compare the observed enhancement factor for mass transfer with those predicted by film and boundary layer model.

ANIMATION DESCRIBING THE PROCESS

CoNCLUSIONS & RESULTS

Experiment no. 6

Objective Determination of the diffusion co-efficient of an organic vapor of carbon tetrachloride in air.

To study the effect of temperature on the diffusion co- efficient.

ANIMATION DESCRIBING THE PROCESSVirtual experiment

CoNCLUSIONS & RESULTS

Experiment no. 7

INTRODUCTIONVapor liquid Equilibrium is a condition where a liquid and its vapor are in equilibrium with each other.

A condition or state where the rate of evaporation is equal to the rate of condensation one a molecular level such that there is no overall vapor liquid inter-conversion.

Relative volatility (a) is a measure of comparing the vapor pressures of the components in a liquid mixture of chemicals.41Animation describing the setupCoNCLUSIONS & RESULTS

CoNCLUSIONS & RESULTS

Conclusions & RESULTS

Experiment no. 8

Animation of a distillation columnOBJECTIVE Design is the planning that lays the basis for the making of every system.

To determine the no. of equilibrium stages and their equilibrium compositions using McCabe Thiele Procedure.

To determine the diameter and cost calculations.Graphical PROCEDURE

Where x and y represents the equilibrium compositionDIAMETER CALCULATIONS

Experiment no. 9

AimTo determine the drying characteristic for rotary dryer.

Experimental setupANIMATION DESCRIBING THE PROCESSPROCEDURE

RESULTS

CONCLUSION

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