Sorching summer, believes that many factories are in cold water for industry machine selection, how to choose to form a complete set of equipment of industrial cold water machine with yourself.
Under the following simple teaching people about cold quantity calculation methods of industrial cold water machine:
the relevant index to calculate water system
1.
Known frozen water flow and calculate the refrigerating capacity in and out of the water temperature difference
machine = frozen water cooling capacity & times;
Density & times;
Specific heat & times;
Temperature difference / 3600
Q (
千瓦)
= G（
m3 / h)
×
1000kg/m3×
4.
2kJ/kg.
k×
Δ
t /3600
2.
Known fever material production, in and out of the water temperature difference and the material performance parameter calculation of the capacity
refrigerator cold quantity = material production & times;
Specific heat & times;
Temperature
Q (
千瓦)
= G(
kg/s)
×
c (
kJ/kg.
K)
×
Δ
t
3.
Mould the calculation formula of the water energy for the
Q = C * delta T * W * S
note: Q for the required water energy kcal/h;
W as the plastic raw material weight kg/h.
C for plastic heat kcal/kg.
℃
delta T as the melt temperature and products form a complete set of temperature difference experience of demoulding by delta T = 200 ℃;
S for factor of safety (
Typically take 1.
35 ~ 2.
0)
When the single machine matching, generally choose a small value, when a cold water machine fit with many sets of mould take great value, such as choosing cold water unit, air cooled S also appropriate to choose a bit bigger accordingly.
selection estimate: cold quantity (
千卡/小时)
Plasticizing capacity (=
Production of kg/h)
×
△t(
Take 200 ℃)
original articles:
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