Heat Exchange Extravaganza
Building Blocks
Heroes and Villains
Design Duel
Miscellaneous
100

Tinker's Flow Model is divided into how many streams? Name them.

5

The streams are A, B, C, E, and F.

100

What is the function of tie-rods?

To support the baffles.

100

______________is the costliest type of shell and tube heat exchanger

Pull through floating head heat exchanger

100

What is the first step in the design of a shell and tube heat exchanger? Also give equation.

Calculation of heat duty.

Φ=ṁCpΔt

100

What is the SI unit of heat transfer coefficient?

Watts per square meter per kelvin (W/m².K).

200

Which is the costliest part of the heat exchanger?

Shell

200

____________make the removal of tube bundle from the shell easy.

Sealing Strips

200

Maintenance and cleaning of tube bundle is easier in:

1. U-tube and floating head heat exchanger

2. Fixed tube sheet heat exchanger 

U-tube and floating head heat exchanger

200

Give the equation to calculate tube bundle diameter.

Db= do(Nt/k1)1/n1

200

Prandtl number is given by, Pr= ?

Pr= Cpμ/k

300

In case of condensation with subcooling in a shell and tube heat exchanger, subcooling coefficient is higher with __________ position.

Vertical position

300

TRUE OR FALSE:

1. Baffles are used in shell to decrease the turbulence in shell side fluid.

2. Baffles indirectly support the tubes and thereby reduce the vibrations in tubes.  

1. FALSE

2. TRUE

300

In case of cooling or heating of shell side fluid (no phase change) heat transfer coefficients obtained are greater in:

1. U-tube and floating head heat exchangers

2. Fixed tube sheet heat exchangers  

Fixed tube sheet heat exchangers

300

Corrosive fluid is allocated on the tube side or the shell side?

Tube Side

300

For only filmwise condensation __________ position gives a higher condensation coefficient.

Horizontal position

400

The best value for ΔTmin in a heat exchanger network, balancing energy and fixed costs, typically falls between ___________oC

10 oC to 20 oC

400

____________are used to maintain the space between baffles.

Spacers

400

For a given heat duty, which of the following is costlier?

1. U-tube and floating head heat exchangers

2. Fixed tube sheet heat exchangers 

U-tube and floating head heat exchangers

400

Give equation of ΔTlm

ΔTlm = ΔT2 - ΔT1/ ln(ΔT2/ΔT1)

400

With respect to heat exchanger networking define “Hot streams”

“Hot streams” are the streams that need cooling.

500

Define:

Above the pinch and Below the pinch

  • Above the pinch: Only hot utility is required, and this region requires external heat.
  • Below the pinch: Only cold utility is required, and this region requires external cooling.
500

Tube side passes are provided to:

A. Increase the tube side flow area

B. Increase tube side fluid velocity

C. Improve the tube side heat transfer coefficient

All, A,B, and C.

500

U-tube heat exchanger is not recommended for tube side dirty fluid.

TRUE OR FALSE 

TRUE

500

If Re > 4000, tube side heat transfer coefficient is determined by which equation?

Dittus–Bolter equation

500

Define tube pitch. 

The shortest center-to-center distance between adjacent tubes

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