[TRNSYS-users] problem about type 121b auxiliary heating

[Jay Zhu]

Dear Mr Duffy :
Sorry to make you misunderstanding.
i intend to make the heating not working, then i set the heating point as a
low level instead of a normal 20 C.
because i wanna see the comparison and differences between the case with
type 121 and without type 121, as i said i made the heating not running,
So i meaned the results for the two cases should be the same, the type 121
which is added for heating doesnt running.

However, cooling consumption of the case with type 121(but i set it not work
at all ) is lower than the case wihout it, and the plot for the room
temperature is also different.

Thank you !
On Tue, Mar 29, 2011 at 9:13 AM, Matt Duffy <duffy at tess-inc.com> wrote:

> Dear Jay Zhu,
>
> "but i set heating point of the thermostat  as low as 5 C, it means the
> heating will still not running based on the Tampa, Fl weather condition. "
>
> Tampa, FL is a moderately warm climate - I don't think the ambient
> temperature would ever drop below 5 C. Thus, that is probably why the
> control signal to your furnace is not going on.
>
> When we teach TRNSYS to new users, we always stress to take their
> simulation one component at a time. Using the online plotter, dynamically
> watch what is going into the component (outputs of other components) and
> what is going out of the component. Thus, watching the control signals, flow
> rates, and temperatures into/out of your component of interest with the
> Type65 online plotter, will shed some light on what is happening in your
> system.
>
> Best regards,
>
> Matt Duffy
>
>
> *----- Original Message -----*
> *From:* "Jay Zhu" <zhujiang1124 at gmail.com>
> *Sent:* Mon, March 28, 2011 22:35
> *Subject:* [TRNSYS-users] problem about type 121b auxiliary heating
>
>   Hey There:
> I tried to use unitary air conditioner type 651 (for cooling) and type 121
> auxiliary heating  (for heating) to connect with type 56 house controlled by
> thermostat type 108 , i found a very curious result after testing these
> types by adding and deleting them
>
> First time, When i totally delete the type 121, make the system runs, the
> simulation obvious will show the cooling only.
> Second time, when i add the type 121 auxiliary heating, but i set heating
> point of the thermostat  as low as 5 C, it means the heating will still not
> running based on the Tampa, Fl weather condition.  So the result will shows
> the cooling only also without heating.
>
> it is supposed the plot for these two cases should be exactly same in my
> opinion. However, cooling consumption of the second case with type 121(but i
> set it not work at all ) is lower than the first case, and the plot for the
> room temperature is also different.
>
> Am i wrong somewhere ? i am so confused for this problem. Thank you in
> advance
>
> I changed my simulation to air source heat pump now, but i still wanna know
> what the exactly problem is for the two simulation cases
>
>
> ------------------------------
>
> _______________________________________________
> TRNSYS-users mailing listTRNSYS-users at cae.wisc.eduhttps://mailman.cae.wisc.edu/listinfo/trnsys-users
>
>
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