[TRNSYS-users] Type 10

[Ali Shahrouzian]

Mukhtar,

It is not mandatory to use Type 670, however I need a component in which the air outlet temperature of HX can remain unchanged.
I just used another Type (Type 753), but it has the same problem. Would you be able to suggest a component that would be suitable in this case?

Thanks in advance,
Ali

From: TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org> On Behalf Of Mukhtar Abeid via TRNSYS-users
Sent: August 29, 2021 7:31 AM
To: TRNSYS users mailing list at OneBuilding.org <trnsys-users at lists.onebuilding.org>
Cc: Mukhtar Abeid <mukhtarabeid at gmail.com>
Subject: Re: [TRNSYS-users] Type 10

[External Email]
Ali

Type 670 is a bit complex where a bypass fluid is modelled.
Is it significant to model the bypass fluid? If not, try to use another component.

Mukhtar

في السبت، ٢٨ أغسطس ٢٠٢١ ٢٣:٢٣ Ali Shahrouzian via TRNSYS-users <trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>> كتب:
Dear TRNSYS users,

I am modelling a closed loop containing of Type 670 (water to air HX), Type 10 (thermal storage) and Type 642 (Fan). In fact, I am going to charge the thermal storage by using hot air exiting from Type 670.
You can imagine, cold air after passing through the Type 670 and exchanging heat with hot water (90 C) , becomes hot (75 C) and then enters the Type 10 (rock bed thermal storage). In this stage, hot air transfers its energy to storage. Finally, cold air enters the type 670 fan and returns to it.

By passing the time, the thermal storage becomes gradually charged, so the outlet and inlet temperatures are approximately equal. Therefore, the inlet and outlet temperatures of the Type 670 (HX) must also be the same. However, after charging the thermal storage, the HX outlet temperature increases continuously (It reaches a temperature of 105 degrees Celsius, which is higher than the temperature of water as its heat source) until an error message is displayed.

I would appreciate it if anyone could assist me in this case.

Best Regards,
Ali

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