[TRNSYS-users] Type 1231 Radiator

[David BRADLEY]

Ilyas,

  If you have not already done so, it would be wise to look at the 
Type1231 documentation in ..\Tess 
Models\Documentation\06-HVACLibraryMathematicalReference.pdf


1- Does the temperature of the hot water inlet to the radiator (Twater, 
in) change or remain a fixed value for example 50C.
note that I have a system of regulation (on / off). when he finds a flow 
= 0 kg / h. he will change it automatically or I have to put a variable 
temperature. How to do it.

I am not sure that I understand this question. Yes, the temperature of 
the water entering the radiator can change. The entering water 
temperature is an input to the model as is the flow rate. The radiator 
model computes the amount of heat transfer to the room as a function of 
the input values so it internally handles the case when there is no 
water flow into the radiator.

2. I have a gas boiler with a yield of 0.94. I used this as the fuel 
power equation (water flow * 4.19 * (50-All)) / (3600 * 0.94) to find 
the power. is that correct?

Again, I am not sure I understand. I would recommend that you use a 
boiler model in which case you'll be asked to provide the efficiency as 
a parameter (or input depending on which model you choose). The boiler 
model will then compute the power that the boiler requires.
kind regards,
  David


On 07/09/2018 09:13, Ilyas KHELIFA KERFAH via TRNSYS-users wrote:
> Hello;
>
> I have questions about type 1231 (Radiator du chfage);
>
> 1- Does the temperature of the hot water inlet to the radiator 
> (Twater, in) change or remain a fixed value for example 50C.
> note that I have a system of regulation (on / off). when he finds a 
> flow = 0 kg / h. he will change it automatically or I have to put a 
> variable temperature. How to do it.
> 2. I have a gas boiler with a yield of 0.94. I used this as the fuel 
> power equation (water flow * 4.19 * (50-All)) / (3600 * 0.94) to find 
> the power. is that correct?
>
> Thank you.
>
> Have a good day.
>
>
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20180710/59f85bdf/attachment.html>