It depends upon where your air conditioner is installed (nearer to sea or away from the sea)and what is the season you are studying this aspects. Normally high humidity in atmospheric air will produce more condensate and vice versa.

Dear Mr. Muduli,

Thank you for your answer. But Is there a way to quantify it, using humidity in atmosphere as input data?

As Mr. Muduli mentioned it will depend on atmospheric conditions and ambient air temperature. However you can estimate maximum possible condensate collection by latent heat of evaporation for water which is 970 BTU/lb at atmospheric pressure.

Therefore, (1/970) lb/BTU  * (1/2.2) kg/lb = 0.00047 kg = 0.47 g/BTU

This is the maximum amount of condensed water that can be collected. The actual amount will always be less than this value at atmospheric pressure. This is a simple estimation.

Dear Mr. Phalak,

Thank you very much for your answer. Is there a bibliographic reference for this formula  that I can use?

Yours,

Marcos

That was simple heat balance, but you can use this link for better estimation.

http://www.buildinggreen.com/calc/calc_condensate.cfm

Thank you again Mr. Phalak. I will send your material to my student immediately.

Yours,

Marcos

As mentioned above it depends on the initial condition( dry bulb temperature and relative humidity) of the air before entering the AC and the final condition of the air after leaving the air conditioner. If these conditions are fixed simply note the difference between  initial specific humidity and the final specific humidity from the Psychrometric chart and multiply this difference by the air mass flow to get the quantity of water that condensed.

Dear Me. Abdaĺla,

Thank you very much for yóur answer. With this procedure I am sure rhat my student willl certainly find this question.

However, AC equipment have their efficiences as heat exchangers. I wonder ir you have an Idea of their values, I mean, for comercial AC devices.

Yours,

Marcos