Re: [TRNSYS-users] R: R: R: I: strange output for type 927

Chiara,

It looks like the data file that you supplied to Type 927 is horribly wrong...LOL Type 927 requires a specially formatted file that contains the NORMALIZED performance (ratio of capacity to design capacity and ration of power to design power) at a combination of source and load temperatures and flow rates. It looks like maybe the file you are using isn't normalized. Please send us your project and data files and we can verify.

Jeff

---
Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: (608) 274-2577  Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com

On 05/17/2018 11:28 am, chiara pinto via TRNSYS-users wrote:

Hi Jeff,

i took your advice and i saw the trace file .lst, that i sent you annexed to this e-mail. So the type 927 seems to be off but i don’t understand why. How can i turn it on? I know that this question seems to be stupid but is my firt project in trnsys and i can’t use very well yet.

Thanks for your help.

Best regards,

Chiara

Inviato da Posta per Windows 10

Da: TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org> per conto di chiara pinto via TRNSYS-users <trnsys-users@lists.onebuilding.org>
Inviato: Thursday, May 17, 2018 6:25:32 PM
A: Jeff Thornton; TRNSYS users mailing list at OneBuilding.org
Cc: chiara pinto
Oggetto: [TRNSYS-users] R: I: strange output for type 927

Hi Jeff,

i took your advice and i saw the trace file .lst, that i sent you annexed to this e-mail. So the type 927 seems to be off but i don’t understand why. How can i turn it on? I know that this question seems to be stupid but is my firt project in trnsys and i can’t use very well yet.

Thanks for your help.

Best regards,

Chiara

Inviato da Posta per Windows 10

Da: Jeff Thornton <thornton@tess-inc.com>
Inviato: Wednesday, May 16, 2018 2:59:02 AM
A: TRNSYS users mailing list at OneBuilding.org
Cc: chiara pinto
Oggetto: Re: [TRNSYS-users] I: strange output for type 927

Chiara,

If you have no heat transfer from the heat pump that means the device is off. And if the device is off then the outlet temperature is set to the inlet temperature. So if you’re seeing a large outlet temperature it means that you are giving the model a large inlet temperature. I suggest you review the TRACE command in TRNSYS and use it to figure out what may be going wrong with your simulation.

Jeff - TESS

Sent from my iPhone

On May 15, 2018, at 1:40 PM, chiara pinto via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:

Inviato da Posta per Windows 10

Da: chiara pinto via TRNSYS-users
Inviato: lunedì 14 maggio 2018 20:17
A: trnsys-users@lists.onebuilding.org
Cc: chiara pinto
Oggetto: [TRNSYS-users] strange output for type 927

Hi everyone,

i’m using type 927 to simulate a water to water heatpump. I have write the input file and i have modify the input schedule in trnsys, but ,when i run the simulation , i have strange value: for example my oulet load temperature= 1.6*10^8 and this is not normal. I have the same problem if i use the input file that trnsys give me as example with its default values.

One other problem is that the heat pump seems to be off because heat transfer to load end heat transfer from source are zero. There is a type to impose that heat pump had to be on from 8.00 am to 17.00 pm?

I really don’t understand where the problem is.

Has anyone a solution for this problem?

Thanks for your help,

Best regards,

Chiara

Inviato da Posta per Windows 10

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