Re: [TRNSYS-users] type 927 outlet source temperature

[Emre Arpaci <emrearpaci10@gmail.com>]

I just realised that my heat pump outlet source temperature is changing between 4 and -1.2 degree as you see in the new clear picture.
When I do not use the control system, the output source temperature remained as -1.2 degree(heat pump always turn on) . When I use the control system, the output temperature varied. I think everything is normal.

I m sorry to hurry up and sent the mail.
Regards

Jeff Thornton via TRNSYS-users <trnsys-users@lists.onebuilding.org>, 5 Eyl 2019 Per, 04:43 tarihinde şunu yazdı:

Emre,

No it's not normal for the outlet temperature to be the inlet temperature - unless there is no heat transfer going on.  Did you turn the heat pump and the pump on?  Did you plot the energy flows from the heat pump to see what they show?  It's hard to see your plot but if the pump temperature in pink is being plotted, and it's the same temperature as the outlet temperature in red, then the pink line would totally cover the red line - which doesn't look like it's happening....

 

Jeff

 

---
Jeff Thornton
President - TESS LLC
3 N. Pinckney Street, Suite 202, Madison WI USA 53703
Office: (608) 274-2577  Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com

On 09/04/2019 1:13 pm, Emre Arpaci via TRNSYS-users wrote:

hello trnsys users

I m heating a greenhouse with water source heat pump as you see in the figure.

I m using a lake as the heat source ( open loop system)

my heat pump values are there

 

Rated heating capacity : 58120 kj/hr

rated heating power : 15120     kj/hr 

inlet source flowrate : 1700 kg/hr

inlet load flowrate : 2600 kg/hr

 

and my lake montly temperatures

january : 4 santigrad degree

february :5

march : 6 ...etc.

 

so my question is that my heat pump output source temperature and the inlet source temperature are same,   is this normal ? 

 

I thınk the output source temperature should be less than inlet source temperature( 4 degrees and changing montly ). because the source energy is absorbed in heating mode.

 

thanks 

 

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