[TRNSYS-users] Type 56 building template for greenhouses

[David Bradley]

Knut-Erik,
 Not that I am aware of - when we have had to model greenhouses, they 
have just been normal Type56 zones with a lot of windows. I have even 
had pretty good luck getting Window5 to come up with window properties 
for some of the glazing materials that are used in greenhouses but not 
in buildings (celular plastic panels, etc.). There are some problems 
with treating the greenhouse as a typical Type56 zone in that Type56 
does not account for beam radiation that passes right through a zone as 
is the case when you get a large fraction of windows. I asked a similar 
question on this forum some time ago and got some useful help.... the 
thread is attached below:

*From Pierre HOLLMULLER*
I confirm that our monitoring data (18 month in 5 minute step, also 
available in 1 hour step) would be available for testing of such a 
greenhouse model. The data concerns 3 identical agricultural 
greenhouses, of which 2 were equipped with daily heat storage systems 
(water tank and air/soil heat exchanger).

For the standard greenhouse (without storage), the data concerns :
- solar radiation
- ambient temperature and humidity
- internal temperature and humidity at 1 and 2 m height
- temperature of internal shading device
- soil temperature at 40 and 70 cm depth
- auxiliary heating
- humidification system
- opening of windows and activation of shading device

A detailed report can be found on: 
http://www.unige.ch/cuepe/html/biblio/detail.php?id=20

It is in French, but going quickly through the figures will give you an 
idea of what was done and what is available (see in particular annex 1)

*From Ian BEAUSOLEIL-MORRISON*
I suggest you look at some of the work published by Jan Pieters et al. 
of Ghent University (Belgium).  They presented an interesting paper at 
the System Simulation in Buildings conference last December, but I am 
not sure whether there are proceedings available yet.


*From Michaël KUMMERT:*
You may find some information in a paper that was recently presented at 
the "Systems Simulation in Buildings" conference:

E. Mashonjowa, J. G.  Pieters, J. R. Milford1, F. Ronsse, S. Denys, R. 
Lemeur - THE USE OF A TRNSYS BASED DYNAMIC GREENHOUSE CLIMATE  MODEL TO 
SIMULATE THE MICROCLIMATE IN A TYPICAL ZIMBABWEAN GREENHOUSE ­ in proc. 
of the 7th International Conference on System Simulation in Buildings
(SSB), Liège, Belgium, December 11-13.

The authors use the so-called "Gembloux Dynamic Greenhouse Climate Model 
(GDGCM)" that was originally written for TRNSYS 13 and was adapted and 
validated in TRNSYS 16. Another reference is:

Pieters J. G. and Deltour J. M. 1997. Performances of greenhouses with 
the presence of condensation on cladding. J. Agric. Engng. Research. 
vol. 68: p. 125-137.

Kind regards,
 David



knut.erik.enerstvedt at niva.no wrote:
> Dear all,
>
> I wish to use Type 56 to model a greenhouse, and would like to know if
> there is an appropriate building template available from somewhere.
>
> Best regards,
> Knut Erik Enerstvedt
>
>
>
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