How to calculate duty on the compressor

[Bogadala]

Hi All

I have a requirement to install new deep freezer, which intends to freeze around 300/400kgs of curries, canopies, other food stuff etc from room temperature to -18c in atleast 12 hrs. The size of the proposed room is 3mtrs x 2.6 mtrs by 2.1 mtrs H.

When considering the above requirement, what should be the condensor Duty in KW.

Can someone help me please.

Many Thanks

Ganesh

[chemi-cool]

Hi Ganesh,

Start from a COPELAND 301 DLL and work your way up to TEV, evaporator and condenser.

Good luck

Chemi

[Bones74]

Use the modern refrigeration book, it has a section on sizing the system that you are mentioning.

[Youssef]

you could try calling some coldstore companies for 'quotes' they'll be helpful in giving you a calc to size some equipment for you as an option if you run through the details over the phone.

[Samarjit Sen]

Hello Ganesh,

First you have to assess the heat load of the system for your application. There are many softwares available. You may calculate the same from Cool Pack or other softwares which the companies provide.

Once you know the load, you select the refrigeration compressor load, Evaporator loads etc. The Condenser should be equivalent to the heat rejection of the system which will depend on the compressor load, condensing temperature , evaporating temperature and the refrigerant.

In case you have a problem, please feel free to get back.

[samiam]

Hi Ganesh

I agree with Samarjit Sen,

Calculate the heat load based on the max temperature conditions (externally), room size, building materials, etc.

Thereafter - a compressor, evaporator and condenser can be selected.

[donrtc]

wats up gan, i 2 hv è same problem as my freezer is suppose 2 reach -18 in summer bt it cn only gt 2 -10 max and reach -18 in winter.

[nike123]

wats up gan, i 2 hv è same problem as my freezer is suppose 2 reach -18 in summer bt it cn only gt 2 -10 max and reach -18 in winter.

Could you translate that in serious English and post your own thread?