This paper presents the design and performances of double pipe heat exchanger embedded straight rectangular fins in the annulus are presented. Solar water heating systems use heat exchangers to transfer solar energy absorbed in solar collectors to the working fluid used to heat the water or a space. An experimental investigation is conducted for different set values of mass flow rate and varying the number of rectangular fins. The experimental results are validated with plain double pipe heat exchanger. The results of rectangular fins in the annulus side causes increased rate of heat transfer and pressured drop compared to plain double pipe heat exchanger. The experimental study is performed by varying mass flow rate of 0.01 kg/s, 0.02 kg/s and 0.03 kg/s of cold fluid in the annulus side and the mass flow rate of hot fluid in the inner pipe is kept constant. The performance and increased pressure drop is a function of number of fins and mass flow rate.

1.
Yang
D
,
Guo
Y
,
Zhang
J
,“
Evaluation of the thermal performance of an earth to air heat exchanger (EAHE) in a harmonic thermal environment
”.
Energy Conversion and Management
, Vol.
109
, pp.
184
94
(
2016
)
2.
Akpinar
EK
, “
Evaluation of heat transfer and exergy loss in a concentric double pipe exchanger equipped with helical wires
”,
Energy Conversion and Management
; Volume
47
, Issues
18–19
, pp.
3473
3486
(
2006
)
3.
Ma
T
,
Li
L
,
Xu
X-Y
,
Chen
Y-T
,
Wang
Q-W
, “
Study on local thermal–hydraulic performance and optimization of zigzag-type printed circuit heat exchanger at high temperature
”,
Energy Conversion and Management
, Volume
104
, pp.
55
66
(
2015
).
4.
Pourahmad
S
,
Pesteei
S M
, “
Effectiveness-NTU analyses in a double tube heat exchanger equipped with wavy strip considering various angles
”,
Energy Conversion and Management
, Volume
123
, pp.
462
469
(
2016
).
5.
Ibrahim
E Z
, “
Augmentation of laminar flow and heat transfer in flat tubes by means of helical screw-tape inserts
”,
Energy Conversion and Management
, Volume
52
, Issue
1
, pp.
250
257
(
2011
).
6.
Targui
N
,
Kahalerras
H
, “
Analysis of a double pipe heat exchanger performance by use of porous baffles and pulsating flow
”,
Energy Conversion and Management
, Volume
76
, pp.
43
54
(
2013
).
7.
Sheikholeslami
M
,
Gorji-Bandpy
M
,
Ganji
D D
, “
Effect of discontinuous helical turbulators on heat transfer characteristics of double pipe water to air heat exchanger
”,
Energy Conversion and Management
, Vol.
118
, pp.
75
87
(
2016
).
8.
Du
YP
,
Qu
ZG
,
Zhao
CY
,
Tao
WQ
, “
Numerical study of conjugated heat transfer in metal foam filled double-pipe
”,
International Journal Heat and Mass Transfer
, Volume
53
, Issues
21–22
, pp.
4899
4907
(
2010
).
9.
Rennie
T J
,
Raghavan
V G S
, “
Numerical analysis of the lethality and processing uniformity in a double-pipe helical heat exchanger
”.
Chem Eng Process
, volume
49
Issue
7
, pp.
672
679
(
2010
).
10.
Gorman
J M
,
Krautbauer
K R
,
Sparrow
E M
, “
Thermal and fluid flow first principles numerical design of an enhanced double pipe heat exchanger
”,
Applied Thermal Engineering
, Volume
107
, pp.
194
206
(
2016
).
11.
Sayed Ahmed
E
,
Mesalhy
O M
,
Abdelatief
M A
,“
Flow and heat transfer enhancement in tube heat exchangers
,
Heat and Mass Transfer
, Volume
51
, Issue
11
, pp.
1607
1630
(
2015
).
12.
Ibrahim
E
,
Moawed
M
, “
Forced convection and entropy generation from elliptic tubes with longitudinal fins
Energy Conversion and Management
, Volume
50
, Issue
8
, pp.
1946
1954
(
2009
).
13.
Sayed
Ahmed
E,
Ahmed
Sayed
,
Mesalhy Osama
M
,
Abdelatief Mohamed
A
, “
Effect of longitudinal-external-fins on fluid flow characteristics for wingshaped tubes bundle in crossflow
”,
Journal Thermodynamics
,
16
. (
2015
)
14.
Syed
KS
,
Ishaq
M
,
Iqbal
Z
,
Hassan
A
, “
Numerical study of an innovative design of a finned double-pipe heat exchanger with variable fin-tip thickness
”,
Energy Conversion and Management
, Volume
98
, pp.
69
80
(
2015
).
15.
Zohir
A E
,
Habib
M A
,
Nemitallah
M A
, “
Heat transfer characteristics in a doublepipe heat exchanger equipped with coiled circular wires
”,
Exp Heat Transfer, Pages
531
545
(
2015
).
16.
Eiamsa-ard
S
,
Thianpong
C
,
Promvonge
P
, “
Experimental investigation of heat transfer and flow friction in a circular tube fitted with regularly spaced twisted tape elements
”.
Int Commun Heat Mass Transfer
2006
;
17.
Sheikholeslami
M
,
Gorji-Bandpy
M
,
Ganji
D D
, “
Experimental study of the influence of perforated circularring on pressure loss and heat transfer enhancement using sensitivity analysis
”,
Appl Therm Eng
, pp.
739
748
(
2015
).
18.
Agrawal
AK
,
Sengupta
S
,
1993
. “
Laminar fluid flow and heat transfer in an annulus with an externally enhanced inner tube
”,
Int J Heat Fluid Flow
, vol.
4
, pp.
54
63
(1993)
19.
Jaisankar
S
,
Radhakrishnan
T K
,
Sheeba
K N
, “
Experimental studies on heat transfer and thermal performance characteristics of thermo siphon solar waterheating system with helical and Left-Right twisted tapes
”,
Energy Conversion and Management
, Volume
52
, Issue
5
, pp.
2048
2055
(
2011
).
20.
Kahalerras
H
,
Targui
N
, “
Numerical analysis of heat transfer enhancement in a double pipe heat exchanger with porous fins
”,
International Journal of Numerical Methods for Heat & Fluid Flow
, Vol.
18
Issue:
5
, pp.
593
617
(
2008
).
21.
Yildiz
C
,
Bíçer
Y
,
Pehlívan
D
,
1996
. “
Influence of fluid rotation on the heat transfer and pressure drop in double-pipe heat exchangers
”,
Appl Energy
,
54
:
49–56
.
5
(1996).
22.
El Maakoul
A
,
Laknizi
A
,
Saadeddine
S
,
El Metoui
M
,
Zaite
A
,
Meziane
M
,
2016
. “
Numerical comparison of shell-side performance for shell and tube heat exchangers with trefoil-hole, helical and segmental baffles
”,
Appl. Thermal Eng.
(2016);
23.
F.
Inc
.,
FLUENT User’s Guide
;
2006
.
24.
Eduardo
C
, “
Heat transfer in process engineering
”,
McGraw-Hill Education
,
2010
;
25.
Bergman
TL
,
Incropera
FP
,
De Witt
DP
,
Lavine
AS
.
Fundamentals of heat and mass transfer
.
John Wiley & Sons
; (
2011
).
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