AHU Chilled water coil temperature details ...

This depends on your geographical location . For office or laboratory . Your question is too broad .

there will be depend on the humidity you are looking for and the air volume passed the cooling coil,

location of AHU IS IN LAGOS-NIGERIA & AHU is for PHARMA HVAC CLEAN ROOM of 100k.

I require inside AHU conditon of WET & DRY bulb temp.

from chiller if it is chilled water flowing in cooling coil 7Deg.C coming out of AHUI cooling coil is 12Deg.C, then what will be the inside AHU before & after cooling coil wet & dry bulb temp.

humidity in the room is RH-less then or equal to 55%. and air volume acroos different AHU 4500cfm to 12000cfm flowing across coil.

location of AHU IS IN LAGOS-NIGERIA & AHU is for PHARMA HVAC CLEAN ROOM of 100k.

I require inside AHU conditon of WET & DRY bulb temp.

from chiller if it is chilled water flowing in cooling coil 7Deg.C coming out of AHUI cooling coil is 12Deg.C, then what will be the inside AHU before & after cooling coil wet & dry bulb temp.

Do you have any idea what your question is?

It makes no difference where in the world you are!

It makes no difference what in the world you are trying to cool!

LAT can not be calculated without proper data!

If you have an AHU than give us the specifications for it.

If you have a water cooling coil give us its specifications.

Do you know the ΔT ( Delta-T) of the chilled water is 5º C? Or is that some kind of fabrication?

Do you know the flow rate of the chilled water?

With the data you have provided I could provide any answer the shows some cooling and I would be right.

EAT is a start. DB & WB

AHU air volume is needed.

Rajuas, the others are correct, you have not submitted enough data for anyone to provide an answer, however here is a partial answer.

Cooling capacity matches the building heat load, not the airflow. However, since you know the temperature rise of the water (7C to 12C) you can calculate the heat load if you know the quantity (water flow) of the water.

Coils are custom made to remove a certain amount of sensible heat (temperature) and latent heat (moisture). Thus a coil for a dry desert would be constructed differently than a coil for a humid tropic area.

You stated the relative humidity of the space, but not the temperature. Also, you did not mention if there was any outside air that would increase both the temperature and humidity of the air across the coil.

However, for a very rough answer, assume that the air entering the coil is about 23C and 55% RH. The air leaving the coil might be about 13C and 99% RH. Good luck with your calculations.