TABLE OF CONTENTS
Objectives
Theories and Principles
List of Apparatus
Procedure
Set-up of Apparatus
Final Data Sheet
Sample Computations
Test Data Analysis
Questions and Answers
Conclusion
Recommendation
References
Preliminary Data Sheet
OBJECTIVE:
• To be able to determine the heating surface area of the
Mapua University Fire Tube Boiler
THEORY AND PRINCIPLE:
List of Apparatus:
1. Inside caliper
2. Outside caliper
3. Digital caliper
4. Steel tape
5. Aluminum rod
6. Chalk
7. Boiler
Procedure:
1. Open the back cover of the boiler.
2. Count the number of tubes for each pass.
3. Using a long aluminum rod, mark the length of the tube for each pass
by inserting the rod through the end side of the tube.
4. With the use of steel tape, measure the length of the tube marked on
the rod using the chalk.
5. Using a caliper, measure the inside and outside diameter of the tube.
6. Using steel tape, measure the diameter of the crown sheet cover.
7. Calculate the total heating surface area of the boiler.
SET-UP OF APPARATUS
Fig. 1 Measurement of the tube
diameter
Fig. 2 Measurement of the crown
sheet diameter
Lateral Surface Area:
1st Pass (Flue tube)
2nd Pass
3rd Pass
A1 = πdmL1N1
A2 = πd2L2N2
A3 = πd3L3N3
Cross-section Area:
Crown Sheet:
ACS = π/2 [dCS² - d1²N1 – d2²N2 – d3²N3]
H.S.TOTAL = A1 + A2 + A3 + ACS
--- Experimental value
% Error = (True value – Experimental value) / True value
Inside
Outside
Diameter Diameter
Length
1 st
1
56 cm 62 cm
2 nd
38
58 mm 64 mm
3 rd
30
58 mm 64 mm
150 cm
Crown Sheet Cover
273 cm
298 cm
304 cm
----------
Pass
Number
of Tubes
True Value = 503 ft²
Experimental Value =
Per Cent Error =
Heating
Surface
Inside
Outside
Diameter Diameter
Length
1 st
1
56 cm 62 cm
2 nd
38
58 mm 64 mm
3 rd
30
58 mm 64 mm
102 cm
Crown Sheet Cover
273 cm
298 cm
304 cm
----------
Pass
Number
of Tubes
True Value = 503 ft²
Experimental Value =
Per Cent Error =
Heating
Surface