Air conditioning High Bay Warehouse
Air conditioning High Bay Warehouse
(OP)
I need some advice on HVAC system design of High bay warehouse. My queries are as follows.
Project background:
Finished good warehouse is an automated warehouse. As per project specifications, the commodities stored in warehouse are medicines packed in plastic bags enclosed in paper cartons and placed on racks with plastic/wooden pallets. This warehouse to be air conditioned with uniform temperature around the entire volume with 24 C +/- 2 F variations, 50% -60% RH.
1.The height of this warehouse is 28 m which is equal to 7 story building. I think we cannot use lighting heat gain as w/m² as normally we use for other project. This may undersize the cooling capacity.
2.The ventilation also to be considered in a different way as normal procedure of ventilation with 0.6 l/s/m² will not be sufficient.
3.What equipment heat gain can be assumed.
Please let me know if you have any other suggestions to be considered in the load calculation.
Project background:
Finished good warehouse is an automated warehouse. As per project specifications, the commodities stored in warehouse are medicines packed in plastic bags enclosed in paper cartons and placed on racks with plastic/wooden pallets. This warehouse to be air conditioned with uniform temperature around the entire volume with 24 C +/- 2 F variations, 50% -60% RH.
1.The height of this warehouse is 28 m which is equal to 7 story building. I think we cannot use lighting heat gain as w/m² as normally we use for other project. This may undersize the cooling capacity.
2.The ventilation also to be considered in a different way as normal procedure of ventilation with 0.6 l/s/m² will not be sufficient.
3.What equipment heat gain can be assumed.
Please let me know if you have any other suggestions to be considered in the load calculation.





RE: Air conditioning High Bay Warehouse
you cannot use any usual load calculation for such height, all common load calculations assume stationary state that you cannot achieve, thermal lift will be one of the major influencing factors in any setup.
RE: Air conditioning High Bay Warehouse
Thanks,
RE: Air conditioning High Bay Warehouse
RE: Air conditioning High Bay Warehouse
With only a 2 degree allowance in temperature and 28m high space, temperature stratification will become an issue.
As ZDR mentioned, type of equipment will affect your ventilation rates.
You will need to know where equipment and shelving is located so you can optimize air distribution.
If you haven't already, send the architect and owner a list of questions and request information on ALL equipment that will be in the warehouse. Get cut sheets if you can. Google and call manufacturers if needed. The more you know what will be in the facility and how it will be used, the better the systems you design can be.
RE: Air conditioning High Bay Warehouse
You'll need to coordinate with the building and equipment suppliers to determine internal heat loads.
You'll need lots of air, at high velocity (relative to typical comfort HVAC velocities) to prevent stratification.
CFD and someone who really knows how to use it well will be your friend for this project.
RE: Air conditioning High Bay Warehouse
so, it's guesstimate more or less. you cannot prevent thermal lift at 28 meter neither you can achieve uniform temperature in space, that would be against basic physical laws.
that you can do is designing some way of local conductive or radiant cooling at each and every pallet.
RE: Air conditioning High Bay Warehouse
You mentioned 28 m high. What are the other dimensions?