MCAC-ATSM-2011-12 Air-cooled modular chiller unit 50Hz
127
Item
Water flow rate(m3/h)
Model Minimum Maximum
MGB-D25W/RN1
3.96 4.84
MGB-F25W/RN1
MGB-D30W/RN1
4.68 5.72
MGB-F30W/RN1
MGCSL-F30W/RN1 4.68
5.72
MGCSL-D30W/RN1 4.68
5.72
MGB-F55W/RN1 8.46 10.4
MGB-F60W/RN1 9.28 11.35
MGB-F65W/RN1 10.08 12.32
MGB-D65W/RN1 10.08 12.32
MGB-F120W/RN1 18.54 22.66
MGB-F185W/RN1 27.9 34.1
MGBT-F250W/RN1 38.7 47.3
12.2.10 Design of the store tank in the system
a. kW is the unit for cooling capacity, L is the unit for (G) minimum water flow volume in the formula.
Comfortable type air conditioner
G= cooling capacity×2.6L
Process type cooling
G= cooling capacity×7.4L
b. In certain occasion (especially in manufacture cooling process), for conforming the system water content
requirement, it’s necessary to mount a tank equipping with a cut-off baffle at the system to avoid water
short-circuit, Please see the following schemes:
Error
R
e
c
o
m
m
e
n
d
a
t
i
o
n
Error
Recommendation
12.2.11Design of expansion tank
If a closed expansion tank with its filled volume of air is too small, the system pressure will easily exceed the
maximum allowable pressure and cause water to discharge from the pressure relief valve, thus wasting
water.If the closed tank is too large,when the water temperature drops, the system pressure may decrease
to a level below the minimum allowable value and cause trouble in the aire vent. Therefore, accurate sizing
of a closed expansion tank is essential.
For diaphragm expansion tanks, the minimum volume of the water tank, Vt, gal(m3),can be calculated by the
following formula, recommended by ASHRAE Handbook 1996, HVAC Systems and Equipment:
V
t
=V
s
v
2
/v
1
-1-3α(T
2
-T
1
)
1-p
1
/p
2
T
1
=lower temperature,
o
F (℃)
To Next Page
Loading...