2011 International Conference on Alternative Energy in Developing Countries and Emerging Economies
- 302 -
Fig. 1. Variable primary pumping system operating points.
Numerical calculation is introduced which is divided
into two (2) loops to determine the system pressure drop
and their corresponding maximum and minimum flow
rates denoted as BEP2 and BEP3, respectively. The
results of calculation are listed in Tab. III.
TABLE
III
S
YSTEM PRESSURE DROP AND COOLING FLOW RATE OF PIPING NETWORK
Description
Head (ft)
Flow rate (gpm)
BEP1
330
26,667
BEP2
76
74,333
BEP3
26
33,869
VI.
C
ONCLUSION
Numerical method can be used to predict the
theoretical system pressure drop and required flow rate of
the distribution network considering that the pumps are
modulated at its best efficiency point.
A
CKNOWLEDGMENT
The authors would like to thank Mr. Mustafa Al
Yousuf, Chief Operation Officer of Emirates Central
Cooling System Corporation for invaluable support
during his tenure in Dubai, UAE.
R
EFERENCES
[1]
Terrence J. Akai:
Applied Numerical Methods for
Engineers
, (Singapore) - John Wiley & Sons, 1994.
[2]
Brian D. Hahn:
Fortran 90 for Scientists and Engineers
,
(Great Britain)
–
Hodder, 1996.
[3]
Erwin Kreyszig:
Advanced Engineering Mathematics
, 6
th
ed, New York (U.S.A.) - John Wiley & Sons, 1998.
[4]
McQuiston, F.; Parker, J.; Spitler, J.:
Heating, Ventilating
and Air Conditioning Analysis and Design,
(U.S.A.) - John
Wiley & Sons, 2000.
[5]
Wilbert F. Stoecker:
Design of Thermal Systems
, 3
rd
ed,
(Malaysia)
–
McGraw Hill, 1989.
