This work investigated the operation conditions of a rotary regenerator operating at low regeneration temperatures, which is widely used in solar desiccant air conditioning systems. A rigorous experimental rig that facilitates the measurement of axial, radial, and angular airflow temperature distribution is used. The measurements covered balanced flow at a wide range of rotational speeds (0–24 rpm), regeneration temperatures (4070°C), and airflow rates (160–530 kg/h). The influences of those parameters on the rotary regenerator effectiveness are presented. The results revealed that the critical effectiveness occurs at 5 rpm (equivalent to 4Cr13). This is lower than that for rotary regenerators operating at high regeneration temperatures and airflow rates. The results also concluded that the Kays and London correlation is sufficient for rotary regenerators operating at low regeneration temperatures. It predicted the experimental data with an average absolute percent deviation of 6.34.

1.
Shang
,
W.
, and
Besant
,
R. W.
, 2004, “
Measurement of the Pore Size Variation and Its Effect in Energy Wheel Performance
,”
ASHRAE Trans.
0001-2505,
110
(
1
), pp.
410
421
.
2.
Shah
,
R. K.
, 1981, “
Thermal Design Theory of Regenerators
,”
Heat Exchangers: Thermal-Hydraulic Fundamentals and Design
,
S.
Kakac
,
A. E.
Bergles
, and
F.
Mayinger
, eds.,
Hemisphere
,
New York
, pp.
721
763
.
3.
Kays
,
W. M.
, and
London
,
A. L.
, 1984,
Compact Heat Exchanger
,
McGraw-Hill
,
New York
.
4.
VDI, VDI-GVC
, 2007,
VDI-Wärmeatlas
,
10th ed.
,
Springer-Verlag
,
Berlin
.
5.
Lambertson
,
T. J.
, 1958, “
Performance of a Periodic Flow Heat Exchanger
,”
Trans. ASME
0097-6822,
80
, pp.
586
592
.
6.
Bahnke
,
G. D.
, and
Howard
,
C. P.
, 1964, “
The Effect of Longitudinal Heat Conduction on Periodic-Flow Heat Exchanger Performance
,”
ASME J. Eng. Power
0022-0825,
86
, pp.
105
120
.
7.
Büyükalaca
,
O.
, and
Yilmaz
,
T.
, 2002, “
Influence of Rotational Speed on Effectiveness of Rotary-Type Heat Exchanger
,”
Heat Mass Transfer
0947-7411,
38
, pp.
441
447
.
8.
Nahavandi
,
A. N.
, and
Weinstein
,
A. S.
, 1961, “
A Solution to the Periodic-Flow Regenerative Heat Exchanger Problem
,”
Applied Science Research
,
10
, pp.
335
348
.
9.
Skiepko
,
T.
, and
Shah
,
R. K.
, 1994, “
Some Additional Data on Longitudinal Wall Heat Conduction in Counter Flow Rotary Regenerators
,”
Heat Transfer 1994, Proceedings of the Tenth International Heat Transfer Conference
, Vol.
4
, pp.
429
434
.
10.
Das
,
S. K.
, and
Sahoo
,
R. K.
, 1999, “
Second Law Analysis of a Cyclic Regenerator in Presence of Longitudinal Heat Conduction in Matrix
,”
Heat Mass Transfer
0947-7411,
34
, pp.
395
403
.
11.
Porowski
,
M.
, 2005, “
Analytical Model of a Matrix Heat Exchanger With Longitudinal Heat Conduction in the Matrix in Application for the Exchanger Dynamics Research
,”
Heat Mass Transfer
0947-7411,
42
, pp.
12
29
.
12.
Worsøe-Schmidt
,
P.
, 1991, “
Effect of Fresh Air Purging on the Efficiency of the Energy Recovery From Exhaust Air in Rotary Regenerators
,”
International Journal of Refrigeration
,
14
(
4
), pp.
233
239
.
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