[TRNSYS-users] Thermal mass in type 56

[Chatchawan Chaichana]

Dear Matt Duffy
Thank you for the suggestion. However, in this case, the concrete slab is
inside the room. So it'll be a kind of sensible energy storage inside the
room. Anyway, I think I can get some idea out of your suggestion. By the
way, I followed the link but I saw no diagram. What should I do?

(I placed the concrete slab inside the room because I don't want to use
frozen foods for now. Until I have some idea about temperature swing, I'll
use real foods, too expensive.)

I was trying to manage the gains inside TYPE56 using TRNBuild. But I don't
think this is gonna work because the concrete slab will be either charge or
discharge stage all the time depending on the different between the concrete
temperature and the room air temperature.



Best regards,
Chat


On Wed, Dec 17, 2008 at 8:53 PM, Matt Duffy <duffy at tess-inc.com> wrote:

>
>
> Dear Dr. Chatchawan Chaichana,
>
> I recommend using one of Jeff's (TESS) slab models to simulate the heat
> transfer between the low temperature room and the ground - assuming that
> the concrete slab is coupled to the earth.
>
> Jeff sent a user some diagrams of temperature beneath a slab of a super
> market store that also had a low temperature room. You will notice the low
> temperature room in the top, right corner of the diagram.
>
> https://www-old.cae.wisc.edu/pipermail/trnsys-users/2008/003641.html
>
>
>
>
> Best regards,
>
> Matt Duffy
> ----- Original Message -----
> From: "Chatchawan Chaichana" <c.chaichana at gmail.com>
> Sent: Tue, December 16, 2008 12:19
> Subject:[TRNSYS-users] Thermal mass in type 56
>
>
> Hi there,
> I'm working on a very low temperature storage room project. I'd like to
> simulate the energy consumption of the refrigeration system that is used to
> remove heat gain to the room. The refrigeration system will be operated
> only
> during the night. There is a mass of concrete inside the room acting as
> thermal mass. At the end of the night, the concrete temperature  is to be
> -30C. During the day, the refrigeration system is off, leaving the concrete
> slap to supply cooling to the room. Yes, it is another demand side
> management.
>
> At the moment, I'm using Type 56 as the storage room with only one zone
> (may
> create other zones later). I'm wondering how can I model the concrete slab
> inside the room.
>
> Best regards,
> Chat
>
> --
> ----------------------------------------------------------------
> Asst. Prof. Dr. Chatchawan Chaichana
> Department of Mechanical Engineering
> Faculty of Engineering
> Chiang Mai University, 50200
> THAILAND
> URL: http://www.thaienergydata.in.th/chatchawan
> Tel: +66 5394 2009
> Fax: +66 5389 2375
> ----------------------------------------------------------------
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users
>
>
> ----- End of original message -----
>
>


-- 
----------------------------------------------------------------
Asst. Prof. Dr. Chatchawan Chaichana
Department of Mechanical Engineering
Faculty of Engineering
Chiang Mai University, 50200
THAILAND
URL: http://www.thaienergydata.in.th/chatchawan
Tel: +66 5394 2009
Fax: +66 5389 2375
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