Re: [EnergyPlus_Support] Purchased Air & Humidity

["Richard J. Liesen" <r-liesen@xxxxxxxx>]

Hello,
To answer your question quickly, it is no.  Purchased Air does not have the 
capability to control the humidity ratio at its exit and the exiting 
humidity ratio is specified in the input file.  Purchased Air adjusts the 
capacity of either its heating or cooling at a given leaving humidity 
ratio.  Purchased Air was intended to be a sizing component.

To attain humidity control you would have to specify a system such as the 
"Desiccant Constant Volume Reheat System".  This is DesiccantCVRh.idf in 
our test suite.

Thanks
Dr. Richard Liesen
Associate Director, Building Systems Laboratory
Department of Mechanical and Industrial Engineering
University of Illinois at Urbana-Champaign


At 10:55 AM 1/22/2003, you wrote:
>Hi All;
>
>Can anyone tell me if its possible to specify humidity conditions to be
>attained within a zone, as well as temperature, using the PURCHASED AIR
>ventilation model. So far I've specified a room humidistat but it doesn't
>seem to interact, or is overwritten by the temperature control set point.
>
>Any help would be useful.
>
>Thanks
>
>Dr Umesh Patel
>Consultant
>Buro Happold
>Brodricks Building
>51 Cookridge St
>Leeds, LS2 3AW
>T: 0113 204 2215 (direct line)
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