centrifugal chiller calculations

[bsna]

Hi! I am a software developer.
I have a task to calculate Flow Rate, Velocity of flow, Temperature, Pressure Loss of evaporator and condenser in centrifugal chiller.
I have Entering Temp., Leaving fluid temp, Fouling Factor, number of passes.
Please, can you give me some formulas to calculate this values or some helpful links.

[US Iceman]

You need some instruments such as: flow meters, pressure transducers, and RTD's or thermocouples for this.

What velocity are you interested in? The tubes of the chiller & condenser or the pipes providing water to these two heat exchangers?

Fouling factor will not provide any useful information.

[Tesla]

Hi Bsna
You need to provide more data like fluid type and one flow parameter, there are many formulas with variables area, density, velocity, height, pressure, power. OEM's would be a good source to provide this type of data and formulae.

[krratheeshnair]

u can use the general formula for Heat exchangers

Q=mCpdT

Q=pV Cp dT ,simplified for water as

Q=500 V dT

Q= BTU/hr
p= Density of Fluid
v= Volumetric Flow in GPM
dt=Temperature difference in F,(Tenetering -Tleaving)

And Veleocity
V=A*v

V= Volumetric Flow in M3/s
A= Area of coil section in M2
v= Velocity in m/s.

Pressure drop dp across each coil,

V=k root of dP
or
V & dp

V= Volumetric flow rate in GPM
k= Constant
dp in Psi