[esp-r] Re: cooling

Fri Feb 28 18:57:35 GMT 2014

Hi, Adriana. You are welcome. Convection opaque surface ptn means the
convection heat transfer through the partition wall. it means the
temperature of  living room inner surface which is in contact with other
zone(zones) increases, if we assume the convective heat transfer coefficent
the same. This means the solar gain, is getting through your living
room "more easily" in respect when the doors closed.

Instead of having the year cooling and heating, I suggest you should check
for each time step, one hour or ten minutes, depenting on your presetting,
the energy balance. Is that for every time step ventilation load is
increased or only in very hot summer ?   it happens only in the afternoon
or all the day? also some other parameters are important to understand the
whole situation.

Regards,

Hua

2014-02-27 19:49 GMT+01:00 Arianna Sdei <A.Sdei at brighton.ac.uk>:

>  Hi Hua,
>
>
>
> thank you very much. I have checked and it looks like with the doors open
> the ventilation load reduces while the convection through opaque surfaces
> ptn (which I don’t know what it means) increases. Does that make any sense?
>
>
>
> Achim,
>
>
>
> The absolute cooling increases from 340 kWh/year to 421 kWh/year when the
> doors are closed.
>
>
>
> Can anyone help to clarify why?
>
>
>
> Thank you,
>
>
>
> Regards,
>
>
>
> Arianna
>
>
>
>
>
>
>
> *From:* 索华 [mailto:suohua1505 at gmail.com]
> *Sent:* 27 February 2014 12:57
> *To:* Arianna Sdei
> *Subject:* Re: [esp-r] Re: cooling
>
>
>
> Dear Adriana, I suggest use RESULT ANALYSIS to check the energy balance of
> the zone, ESP-r will split , in every time step, into infiltration,
> ventilation, storage, convection etc. Just check one tipical heating or
> cooling time step. In this way, you can check which parameter
> increases which does not, it may be helpful for you furture analysis.
>
>
>
> Regards,
>
>
>
> Hua
>
> 2014-02-27 13:28 GMT+01:00 Arianna Sdei <A.Sdei at brighton.ac.uk>:
>
> Dear Achim,
>
>
>
> Thank you for your comment. I do have an afn defined and I am only
> imposing a cooling set point temperature on the control file for the living
> room during the day and the bedroom at night. There is no night time
> cooling at the moment. The cooling load seems to increase slightly in his
> absolute value while the heating reduces quite a lot . I will send you more
> detailed figures shortly,
>
>
>
> regards
>
> Arianna
>
>
>
> *From:* esp-r-bounces at lists.strath.ac.uk [mailto:
> esp-r-bounces at lists.strath.ac.uk] *On Behalf Of *Achim Geissler
> *Sent:* 25 February 2014 19:31
> *To:* esp-r at lists.strath.ac.uk Club
> *Subject:* [esp-r] Re: cooling
>
>
>
> Dear Arianna,
>
>
>
> the information about the model is a bit scarce.
>
> - do you have an afn defined?
>
> - how is this affected by closing doors?
>
> - could closing doors reduce night time cooling (if any)?
>
> - how is the AC modelled? Do ducts run through zones that may become
> warmer by closing doors?
>
> - how do surface temperatures of the living room change after closing
> doors (i.e., does the bedroom become hot and what is the construction
> between these zones)?
>
> - is the cooling load absolutely higher or relatively?
>
>
>
> … and maybe a few more I am not thinking about, right now.
>
>
>
> Cheers,
>
> Achim
>
>
>
>
>
>
>
> On Feb 25, 2014, at 6:23 PM, Arianna Sdei <A.Sdei at brighton.ac.uk> wrote:
>
>
>
> Dear All,
>
>
>
> I am running some simulations in a multizone model of a single storey
> house with one bedroom and one living room. I am controlling some air
> conditioning in the living room only from May to September. So, I thought
> that by closing the door of the living room I would get a lower cooling
> load. But actually if I close all doors in the house I get a slightly
> higher cooling load and a lower heating load. Do you know why? Let me know,
>
>
>
> Regards,
>
>
>
> *Arianna Sdei*
>
>
>
> Research Fellow IFORE (Innovation For Renewal)
>
>
>
> UNIVERSITY OF BRIGHTON
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> --
>
> *Suo Hua*
>
>
>
> *Ph.D Student in Tecnologia e Progetto per l'Ambiente Costruito/Technology
> and Design for Environment and Building*
>
>
>
> *Il Dipartimento B.E.S.T.Dipartimento di Scienza e Tecnologie
> dell’Ambiente Costruito/ The Department of Building Environment Science &
> Technology*
>
>
>
> *Politecnico Di Milano*
>
>
> *Email:hua.suo at mail.polimi.it <Email%3Ahua.suo at mail.polimi.it>*
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> *Tele:3890994652*
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-- 
*Suo Hua*

*Ph.D Student in Tecnologia e Progetto per l'Ambiente Costruito/Technology
and Design for Environment and Building*

*Il Dipartimento B.E.S.T.Dipartimento di Scienza e Tecnologie dell’Ambiente
Costruito/ The Department of Building Environment Science & Technology*

*Politecnico Di Milano*

*Email:hua.suo at mail.polimi.it <Email%3Ahua.suo at mail.polimi.it>*

*Tele:3890994652*
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