[TRNSYS-users] TYPE 927 Water to Water HP

[David BRADLEY via TRNSYS-users]

Khem,

   In the Type927 parameter list in your example project, the parameter 
that sets the number of source temperatures in the heating performance 
data file is set to 5 but in fact there are 6 values of source 
temperature in the data file. If you change the value of parameter 9 
from 5 to 6 then the Type will return the expected power consumption and 
COP.

kind regards,

  David



On 11/02/2016 14:57, bridjesh gautam via TRNSYS-users wrote:
> Dear TRNSYS Users,
>
> I am trying to use either TYPE 927 or 1221 in combination with 
> unglazed solar collectors and have some questions. If you have any 
> experience with W-W HP components, I would love to hear from you.
>
> *1. Calculation of COP and Power *
>
> For some reason, when I input load temperature ,source temperature and 
> flow rate exactly as listed in heating performance file, the COP and 
> power consumption calculated by the component is different than the 
> values entered in the data file.
> *
> *
> *Example *
> A line of  example heating data file reads: (pre-installed example) 
> (Heating capacity =30000, Heating power=6000)
>
> 0.90070.6731!Normalized Capacity and Normalized Power at 1, 1, 
> 15.556[C], -1.1111[C]
>
> But when I put input load temperature 15.556  , source -1.11, input 
> and output mass flow = 1440 ( 0.4 l/s ,rated) , the model calculates 
> Power and COP  as 5961 kJ/hr and 4.59, when clearly the input file 
> shows power to be (0.67*6000), which is not at all equal to what model 
> calculates. COP values are different too. For all these I just used 
> Type 927 with no change and the file is attached.
>
> *So my question is, am I understanding everything wrong or are there 
> some bugs in the code itself ? *
>
>
>
>
>
> I hope, someone will be kind enough to answer me.
>
> Your's
> Khem Gautam
> Masters student
> Aarhus University, Denmark.
>
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-- 
***************************
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

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