[TRNSYS-users] R: water-water heat pump simulation

[Jacopo Valente]

Thank you for your suggestion. I understand the idea to have a lump capacitance to represent the zone and then control its temperature. However, I only know the type 690 which input refers to an air flow rate. Is there a corresponding type to use in a water-water heat pump, so with a water flow rate?
Thank you again.

kind regards,

Jacopo

Da: David BRADLEY<mailto:d.bradley at tess-inc.com>
Inviato: lunedì 16 maggio 2022 20:00
A: TRNSYS users mailing list at OneBuilding.org<mailto:trnsys-users at lists.onebuilding.org>
Cc: Jacopo Valente<mailto:jacopovalente at LIVE.IT>
Oggetto: Re: [TRNSYS-users] water-water heat pump simulation


Jacopo,

 This is a little bit tricky; the problem is that the loads you have are presumably instantaneous heating and cooling loads. If your delivery device were something without a lot of thermal mass (like zonal heat pumps or some fan coils) then I would recommend that you impose the loads directly onto the liquid stream. However, the radiant floor has a lot of thermal mass of its own. I think the best approach would be to impose your loads on a lumped capacitance that is tuned to mimic the zone. Then you can define a radiant floor using Type653 in order to control the temperature of the lumped capacitance that has your original building loads imposed upon it.

kind regards,

 David


On 05/16/2022 09:16, Jacopo Valente via TRNSYS-users wrote:
Dear trnsys users,
I’m simulating a ground water source heat pump for residential conditioning system. I have the hourly load profile of the building and i’m not using the type56. However my system has radiant floor as emmiter and i see that it’s possible to use type653 only with building type56. I’m looking for a way to simulate this kind of implant, i try with type 690 but i’m not sure it’s right for a water system. Any suggestions to simulate my implant without type56?

Thank you every all

Best regards,
Jacopo Valente



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