Hello,
I am currently working on a model of a greenhouse in TRNSYS. I have
gotten as far as crating the 3D model in Google Sketchup and importing
it into TRNBuild Type 56. The temperature and humidity control for the
greenhouse will be handled by an external
liquid desiccant unit that I am still in the process of creating.
I am more concerned about the internal characteristics of the
greenhouse. I have created a structure with mostly windows and although I
have not yet been able to apply a double polyethylene type to them this
shouldn't pose too much of a problem. I read
somewhere that the Type 56 does not account for radiation that crosses
through parallel windows and back out of the greenhouse, has anyone
found a solution for this?
Another puzzling process is the transpiration and respiration of
the plant vegetation. I am aware of the equations that model these
factors but do not know how to apply them to the system. One possibility
might be to create an external type for the vegetation
and use the necessary outputs as input variables into the Type 56
Building. Or possibly adding a "Gain" in TRNBuild that might account for
the added humidification and CO2 levels, although I am not sure how
this would work.
I was hoping someone might be able to shed some light on these
issues and if there are any working models around I would very much
appreciate taking a look at one.
Sincerely,
Tammo Bruinsma