[TRNSYS-users] Energy removed Tank Type 60

David BRADLEY d.bradley at tess-inc.com
Mon May 5 09:13:38 PDT 2014

   One convenient way of defining the solar fraction is:

qDelivered/(qAux + qParasitics)

qDelivered would come from your adsorption chiller model, qAux would be 
the amount of energy delivered by the aux heater, and qParasitics would 
primarily be your pumping energy and the electricity required by the 
adsorption chiller. This method avoids having to worry at all about what 
is happening in the tank.
Kind regards,

On 5/3/2014 05:23, Martin Berov wrote:
> Hi to all,
> I need opinion about a calculation: I have a tank Type 60 which is 
> heated with solar collectors(heat exchanger) and it's outlet is in 
> serial connected to auxiliary heater used to drive adsorption chiller. 
> The return of the chiller is sent either in the tank or  again 
> directly to the aux.heater depending from the temperature etc...
> Since I want to calculate the solar fraction I need the amount of 
> energy removed from the tank so do you think than I only need the 
> output "Energy removed from the outlet" or I need the difference 
> between the "Energy removed from the outlet - Energy supplied from the 
> inlet" - since if I use this difference I never reach the required 
> heat energy - For example having adsorption chiller with 5 kW cooling 
> power even with aux heater of 30 kW and flow rate of 5000 kg/h I have 
> hot energy lower than the required?
> I also use the heat, cooling and chilled energy in the control strategy
> What do you think?
> Kind regards
> Martin
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users

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

d.bradley at tess-inc.com


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20140505/bd4af881/attachment-0001.htm>

More information about the TRNSYS-users mailing list