This project developed a computer-integrated heat exchanger test apparatus for use in a thermodynamics laboratory. A team of three students designed, fabricated, and tested the apparatus under the supervision of faculty members. Key aspects included integrating temperature sensors, pumps, and a microcontroller to the double pipe heat exchanger design. Performance testing was conducted and results were analyzed using a LabView interface created to control the system and log data from the integrated sensors. Further planned work involves modifying the design to study both parallel and counterflow configurations and improving insulation to reduce heat losses.

1. COMPUTER INTERGRATED HEAT
EXCHANGER LABORATORY APPARATUS
FOR THERMODYNAMIC LABORATORY
UGP NUMBER 14

2. PROJECT MEMBERS
Wimukthi K.A.H EG/2012/2123
Rajasinghe R.A.D.P.M EG/2012/2044
Maitipe P.C EG/2012/1992
Dr. Chaminda Karunasena – Supervisor
Mrs. Kalpani Pathmasiri – Co supervisor
PROJECT SUPERVISORS
Presented by : Wimukthi K.A.H
2/19

3. PRESENTATION OUTLINE
 INTRODUCTION
 ACHIVEMENTS
 CONCEPTUAL DESIGNS
 PERFORMANCE AND TESTING
 FABRICATION STAGE
 FURTHER MODIFICATIONS
 SUMMERY OF WORKS
Presented by : Wimukthi K.A.H
3/19

4. What is our project ?
Developmentofa computerintegratedheat exchangertestapparatus forthe thermodynamics laboratoryof the DMME
Presented by : Wimukthi K.A.H
In the laboratory experiment,
- Measure temperature values in particular inlet and outlet water ports
- Control water flow rates
INTRODUCTION
4/19
Manually

5. Armfield ht30x - Computer Controlled Heat Exchanger Service Module
- Small-scale
- benchtop equipment
- Fast response
- All functions computer controlled
- Standard USB interface
- Full educational software with data logging,
control, graph plotting
- Suitable for project work.
Presented by : Wimukthi K.A.H
5/19

6. AIMAND OBJECTIVES
- Test different type of heat exchangers at one unit.
- Read values and control apparatus with computer integrated controller
system.
- The market cost of this type of apparatus is expensive. But, hope to made it
in low cost with same functions.
Presented by : Wimukthi K.A.H
6/19

7. ACHIVEMENTS
 Tested thermocouples with Arduino module.
 Fabricated test apparatus with counter flow-double pipe heat exchanger
 Developed the controlling interface by using Lab-View software.
 Connected model apparatus with Lab-view software and testing.
 Driven test apparatus, control flow rates and measured temperature values via
Software interface.
Presented by : Wimukthi K.A.H
7/19

8. Computer
integrated heat
exchanger unit
Heat exchangers
1.Double pipe
2.Shell and tube
3.Plate type
Double pipe
Pumps
230 ac pump
12v dc pump
Wind shield pump
12V dc pump
12V dc wind
shielded pump
Sensors
Thermocouple
LM 35
Ds18b20
DS18b20 sensor
Micro controller
Arduino
PIC
Arduino mega
Flow controller
VFD drive
L 298N
L298N
Software
Lab View
Visual basic
LabView
Module
NI 9211
Max 6675
CONCEPTUAL DESIGNS
Presented by : Rajasinghe R.A.D.P.M
8/19

9. PERFORMANCE AND TESTING
Presented by : Rajasinghe R.A.D.P.M
9/19

10. SIMULATION OF MODEL
Presented by : Rajasinghe R.A.D.P.M
10/19

11. LAB VIEW INTERFACE
Presented by : Rajasinghe R.A.D.P.M
11/19

12. Main components
• Arduino mega
• Five temperature sensors (ds18b20)
• L298N motor controller
• Two motor pumps (f hot and cold water)
• Five 4.7k Resistors
• Five channel selector switch
Presented by : Rajasinghe R.A.D.P.M
12/19

13. LAB VIEW PROGRAMME
Presented by : Rajasinghe R.A.D.P.M
13/19

14. DS18B20
Temperature
sensor
Windshield pump
FABRICATION STAGE
Presented by : Maitipe P.C
14/19

15. LAB SHEET
Presented by : Maitipe P.C
15/19

16. LAB SHEET Cont…
 Main part of this lab experiment is find out overall heat transfer coefficient of copper & water.
 To determine overall heat transfer coefficient, there are lot of method. But in here use Logarithmic
Mean Temperature Difference (LMTD) method.
𝑄ℎ = 𝑚ℎ 𝐶ℎ(𝑇3 − 𝑇4)
𝑈 =
𝑄ℎ
𝐴 ∆𝑇𝑙𝑚
∆𝑇𝑙𝑚 =
∆𝑇1 − ∆𝑇2
ln(
∆𝑇1
∆𝑇2
)
Presented by : Maitipe P.C
16/19

17.  Modify this apparatus to get both parallel & counter flow.
 Insulate heat exchanger part to reduce losses.
 Design android application to calculation part.
FURTHER MODIFICATIONS
Presented by : Maitipe P.C
17/19

18.  Defined suitable sensor.
 Choose and calibrate the pump.
 Identify the suitable material to fabricate heat exchanger.
 Optimized hot and cold water reservoir.
 Design wiring network and construct computer control interface.
SUMMERY OFWORKS
Presented by : Maitipe P.C
18/19

19. THANK YOU
19/19