The temperature of cooled water is high when using the
traditional water cooling method in freezing construction. Therefore, in this
study, a secondary water cooling system is designed and developed for the
freezing construction of long tunnels. This system comprises a secondary water
refrigerator and medium and hightemperature
water pumps. The primary cooled water is transferred to the secondary water
refrigerator through a mediumtemperature water pump,
and the cooled water is reproduced. During the secondary water cooling process,
the highpressure liquid refrigerant cools again, and
the entropy of the refrigerant and cooling capacity per unit mass increase,
whereas the compression work remains unchanged. The engineering practice
reveals the superiority of this system over the conventional water cooling
method, including a higher cooling efficiency of brine that can reduce the
crossing time of the freezing wall, a lower temperature of brine, a higher
strength of the frozen curtain, a better freezing effect, and lower energy
consumption.
ZHOU Kefa
,
HUANG Baolong
. Design of Secondary Water Cooling System for Freezing Construction
of Long Tunnels[J]. Tunnel Construction, 2024
, 44(1)
: 109
-115
.
DOI: 10.3973/j.issn.2096-4498.2024.01.009
