Exp. 2 Heat Transfer Study on Shell and Tube Heat Exchanger

8/10/2019 Exp. 2 Heat Transfer Study on Shell and Tube Heat Exchanger

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Mass & Heat Transfer Lab BKF3721

Faculty of Chemical & Natural Resources Engineering

Experiment 2

HEAT TRANSFER STUDY ON SHELL AND TUBE HEAT

EXCHANGER

Name

Matric No.

Group

Program

Section

Date

Semester II - Session 2013/2014


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EXPERIMENT 2: HEAT TRANSFER STUDY ON SHELL AND TUBE HEAT

EXCHANGER

OBJECTIVE

1.

To calculate and analyze the heat transfer process at steady state in a counter current mode.

2. To determine the effect of liquid flow rate on the heat transfer coefficient.

3. To compare the effectiveness heat transfer based on flow stream (manipulation of the hot

water and cold water flow rate).

EQUIPMENT/APPARATUS/MATERIAL

1. SOLTEQ Shell & Tube Heat Exchanger (Model: HE 667)SHE No. 1.


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EXPERIMENTAL PROCEDURES

General Start Up Procedure

1. Fill at least of water in the hot and cold water tank by opening the HV2 and/or HV5

valve(s), respectively.

2. Switch ON the power supply at the electrical header and equipment panel.

3. The equipment is now ready to be run.

Table 1:Valve arrangements for Shell & Tube Heat Exchanger in counter current flow

OPEN CLOSE OPEN LEAVE ALONE

HV3, HV8, HV10,

HV12

HV2, HV7, HV11,

HV13

HV4, HV9 HV5, HV15

Counter Current Shell & Tube Heat Exchanger

1.

Set the valves to counter current process as in Table 1.

2. Switch ON the heater and set the temperature to 500C. When the temperature become constant at

500C, switch ON the pumps (P1 and P2) and the air cooler. Release the air trap in shell side by

opening the HV14 valve (Close back this valve after air trap released).

3. To study the effect of hot water stream,

i. Adjust HV5 valve to obtain the desired flow rate for hot water, and at the same time fix

the flow rate for the cold water stream using HV15 valve (please set one value of flow

rate).

ii. Allow the system to reach steady state.

iii.

Record all the related data.

iv.

Repeat steps (i) to (iii) for FOURdifferent setting of the hot water flow rate (Hot water

flow rate range: 5 -20 LPM)

4. To study the effect of the cold water stream,

i. Adjust HV15 valve to obtain the desired flow rate for the cold water and at the same time

fix the flow rate for hot water using HV5 valve (please set one value of flowrate).

ii. Allow the system to reach steady state.

iii. Record all the related data.

iv.

Repeat steps (i) to (iii) for FOURdifferent setting of the cold water flowrate (cold water

flowrate range: 5 -20 LPM)

5. Switch OFF pumps (P1 and P2).


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RESULT

Table 2: Counter Current Shell & Tube Heat Exchanger Data Analysis

Effect of Hot Water Stream

Flow Rate (FT2 or FI2):

Flow Rate

(FT1 or FI1)

LPM

Hot Water Inlet

(TT1 or TI1)

(oC)

Hot Water Outlet

(TT2 or TI2)

(oC)

Cold Water Inlet

(TT3 or TI3)

(oC)

Cold Water Outlet

(TT4 or TI4)

(oC)

Effect of Cold Water Stream

Flow Rate (FT2 or FI2):

Flow Rate

(FT1 or FI1)

LPM

Hot Water Inlet

(TT1 or TI1)

(oC)

Hot Water Outlet

(TT2 or TI2)

(oC)

Cold Water Inlet

(TT3 or TI3)

(oC)

Cold Water Outlet

(TT4 or TI4)

(oC)


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Heat Exchanger Layout:

Type : 1-1

Length of tube : 1.42 m

Tube ID : 11 mm

Tube OD : 14 mm

Tube surface area : 0.0491 m2

Number of tubes : 37

Shell diameter : 150 mm

Baffle length : 284 mm

DISCUSSIONS

Discuss all your results. The questions below only serve as a guideline. Your discussion should not

only limit to these questions.

1. Calculate the heat load, heat absorb, heat loss and efficiency.

2.

Calculate the log mean temperature, Tlm.

3. Calculate the Reynolds number, heat transfer coefficient at tube and shell sides and the overall

heat transfer coefficient.

4.

Plot the graphs for the overall heat transfer coefficient vs. water flow rate (hot and cold streams)

and graphs efficiency vs. water flowrate (hot and cold streams). Discuss thoroughly all the

graphs.

Documents

Exp. 2 Heat Transfer Study on Shell and Tube Heat Exchanger