UNIQUE DOAS SYSTEM DESIGNED FOR INTEGRATION WITH RECIRCULATION AIR HANDLING SYSTEMS
An integrated air handling system having a make-up air system that treats outside air and a recirculating system that mixes the treated outside air with building return air. The make-up air system may include a filter, a dehumidifier, a humidifier, a combination of a dehumidifier and a humidifier, and/or an exhaust fan. The mixed air is supplied to a structure.
1 . An integrated air handling system comprising:
a make-up air system that treats a first air stream; and
a recirculating air system that mixes the treated first air stream and a building return air stream into a mixed air stream and supplies the mixed air stream to a structure.
2 . The integrated air handling system according to claim 1 , where in the make-up air system comprises a filter that filters the first air stream.
3 . The integrated air handling system according to claim 1 , wherein the make-up air system comprises a dehumidifier that dehumidifies the first air stream.
4 . The integrated air handling system according to claim 1 , wherein the make-up air system comprises a humidifier that humidifies the first air stream indirectly by humidification of a recirculation air side stream.
5 . The integrated air handling system according to claim 1 , wherein the make-up air system comprises a pre-filter and a final filter.
6 . The integrated air handling system according to claim 3 , wherein the dehumidifier dehumidifies the first air stream to a dew point that is sufficiently low so as to ensure that the return air is of a dew point not greater than 59° F.
7 . The integrated air handling system according to claim 3 , wherein the humidifier humidifies an appropriate volume flow of recirculation air to a dew point level such that the return air has a dew point that is not less than 41.9° F.
8 . The integrated air handling system according to claim 1 , wherein the make-up air system further comprises:
at least one compressor;
at least one evaporator coil; and
at least one condenser coil.
9 . The integrated air handling system according to claim 1 , further comprising at least two isolation dampers.
10 . The integrated air handling system according to claim 1 , wherein the structure includes a data center.
11 . A method for integrating a make-up air system with a recirculating air system, comprising:
introducing a first air stream into a make-up air system;
treating the first air stream in the make-up air system;
injecting the treated first air-stream into the recirculating air system;
mixing the treated first air stream with a building return air stream; and
supplying the mixed air stream to a structure.
12 . The method of claim 11 , wherein the make-up air system includes a filter.
13 . The method of claim 11 , wherein the make-up air system includes a dehumidifier.
14 . The method of claim 11 , wherein the make-up air system includes a humidifier.