I always get a little suspicious when ventilation is based on so many air changes, but if you are sure you need that much fresh air you could look at reducing the ventilation load with an energy recovery ventilator, maybe it cuts the vent load in half.
You could talk to someone like Engineered Air or (choke cough) Addison and get either an AHU with the reheat or even a 100% outside air unit.
Here is sometyhing I used for a night club-- lots of outside air and large internal latent load. This was custom built by Engineered Air.
An 8 row dx coil with 4 compressors pulled the humid mixed air down to about 52F. The brown is heresite corrosion protection
In the first picture you will see a smaller compressor, its evaporator and condenser are downstream of the main cooling coil. If humidity began to rise this smaller compressor would engage, it would pull down the air temperature 2 more degrees then its heat of rejection would warm the entire air stream up. With the fan and motor heat on top of this reheat it could blow out 65F air that was bone dry.
The reheat can be in many forms, the most sinfuil is electric reheat. I prefer hot gas reheat where it uses condenser heat.
York makes a DR series of roof top units. They are dual circuit. They can be configured to run in what they call the 'alternative reheat mode' Basically on a call to dehumidify, they run both compressors. One compressor will reject its heat outside, the second compressor's heat of rejection reheats the air. You end up with a supply air condition with a similar dry bulb to what enters the unit, just that it is fairly dry. If the space needs temperature control, both compressors dump their heat outside and the unit blows cold air.
You could also do a moisture balance on the space. You size a cooling system to provide your temperature control. You see how much moisture it will remove. You then look at how much additional moisture needs to be removed and size a dehumidifier accordingly. maybe look at the BKP series dehumidifiers (cha-ching) by heat pipe technology.
You will be conservative with the above approach.
You can even get the BKP-AC unit which has a remote condenser, they will work like first stage cooling even, blow cold air as long as the space stat requires cooling and then reject the heat outside if the space is cool yet the indoor humidity is high.
Munters is making some dehumidifiers now, desicant based with DX. The condenser heat from the DX is what drives the moisture out of the desiccant wheel.
As others are hinting, this sure sounds like a lot of outside air just for a warehouse.
I am on a small tropical island and see dewpoints like that. I get a litttle suspcious when people from the mainland face humidity like that. I deal with high humidity and the real secret to controlling it is to control how outside air moves inside the building and to precondition it, before the humidity gets into the space. It is like wearing a condom as opposed to going for a shot of penecillin after the fact.
Zesti, I am always amazed how the non-english speaking world still can communicate effectively in English yet when some of us english speakers go abraod we feel that if we talk real slow and loud in english people will understand us.
Take the "V" out of HVAC and you are left with a HAC(k) job.
