expansion valve for evaporator

[ah fai]

hello everyone
how can i select the correct expansion valve for the water cooling tank evaporator

system 1
lenght for each steel pipe 6m
thickness 3mm
OD 1 1/4''
total pipe in parallel 30

system 2
lenght for each stainless steel 316L pipe 6m
thickness 1.5mm
OD 1''
total pipe in parallel 20

thanks in advance....

[Sandro Baptista]

First you need to know the refrigerant capacity and the operating conditions. The capacity depends on the temperatures of the fluids, mass flows,...give me thermodynamic data.

[ah fai]

actually i am electrical engineer but new to refrigeration industry, what is mean by thermodynamic data. Could u pls explain?

i need to cool down the acid in aluminium industry,

acid tank 4ft wide, 25ft lenght, 9ft deep
acid temperature 30dec
i need to cool down to 20dec

if for the 6m, 1 inch, 1.5 thickness stainless steel 316L pipe

1.how long that i need for the evaporator design
2.the expansion valve and the total cooling capacity?

thanks for reply.

[Sandro Baptista]

First at all I need the sensible specific heat (cp) kJ/kg.K on SI units is needed or in another units, then I make the conversion. Also I need to know the time you need yo cool from 30 to 20ºC.

[mad fridgie]

I would suggest that you employ a refrigeration engineer, to design and build the system.

[shooter]

get yourself coolpack from denmark.