In this paper, the determination of convective heat transfer coefficient under actual convection processes is proposed by using thermoelectric modules. The thermoelectric modules are positioned where cooling/heating processes take place. Based on the Seebeck effect and energy balance, voltage signals are mathematically related to the convective heat transfer coefficient in real time. In experiments, convective heat transfer coefficients of airflow in a wind tunnel are determined under heating/cooling processes at various wind speeds. The relative mean difference of the convective heat transfer coefficients between the proposed methodology and empirical formula is 2.31%. For real-time implementation, convective heat transfer coefficients of a copper plate, which is exposed to outdoor conditions during a whole day, are determined to predict copper plate temperatures from a governing equation. The performance of temperature prediction is confirmed by a coefficient of determination R2 of 0.9992. Analytical and experimental results show the effectiveness of the proposed thermoelectric modules in determining the convective heat transfer coefficient for air under actual cooling/heating conditions, in time.

References

References
1.
Bairi
,
A.
,
2016
, “
Quantification of the Natural Convective Heat Transfer for the Tilted and Wire-Bonded QFN32b-PCB Electronic Assembly
,”
Int. Commun. Heat Mass Transfer
,
72
, pp.
84
89
.
2.
Mavromatidis
,
L. E.
,
2016
, “
Study of Coupled Transient Radiation-Natural Convention Heat Transfer Across Rectangular Cavities in the Vicinity of Low Emissivity Thin Films for Innovative Building Envelope Applications
,”
Energy Build.
,
120
, pp.
114
134
.
3.
Incropera
,
F. P.
, and
DeWitt
,
D. P.
,
2007
,
Fundamentals of Heat and Mass Transfer
,
6th ed.
,
Wiley
,
Hoboken, NJ
.
4.
McAdams, W. H., 1958, Heat Transmission, 3rd ed., McGraw-Hill, New York.
5.
Zhang
,
J.
, and
Delichatsios
,
M. A.
,
2009
, “
Determination of the Convective Heat Transfer Coefficient in Three-Dimensional Inverse Heat Conduction Problems
,”
Fire Saf. J.
,
44
(
5
), pp.
681
690
.
6.
de Lieto Vollaro
,
A.
,
Galli
,
G.
, and
Vallati
,
A.
,
2015
, “
CFD Analysis of Convective Heat Transfer Coefficient on External Surfaces of Buildings
,”
Sustainability
,
7
(
7
), pp.
9088
9099
.
7.
Leephakpreeda
,
T.
,
2012
, “
Applications of Thermoelectric Modules on Heat Flow Detection
,”
ISA Trans.
,
51
(
2
), pp.
345
350
.
8.
Sippawit
,
N.
, and
Leephakpreeda
,
T.
,
2015
, “
A Study of Sensing Heat Flow Through Thermal Walls by Using Thermoelectric Module
,”
Therm. Sci.
,
19
(
5
), pp.
1497
1505
.
9.
Leephakpreeda
,
T.
,
2012
, “
Experimental Determination of Thermoelectric-Module Parameters and Modeling for Cooling/Heating Control Design
,”
Exp. Tech.
,
36
(
6
), pp.
13
20
.
10.
Korprasertsak
,
N.
, and
Leephakpreeda
,
T.
,
2016
, “
Mathematical Modeling and Validation of Cooling/Heating Effects in Thermoelectric Module Coupled With Heat Sinks
,”
Seventh International Conference on Mechanical and Aerospace Engineering
(
ICMAE
), London, UK, July 18–22, pp.
95
99
.
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