Welcome to the TRNSYS Users Forum.
The forum is a place where people can interact and have discussions about different topics involving the use of the TRNSYS software package. Here you can post topics for discussion or questions on using TRNSYS and get advice from other users or TRNSYS experts. This forum is not intended for detailed technical support. Users should contact their distributor’s hotline for such assistance.
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i am unable to understad how this heat pump 927 actually works even in the most basic circuit using thermal collector.......it increases the temp at output side (load side) but the source side output is not decreasing compared to source in..........and even in some points this source side temperature falls below 0 that is in negative region.....can anyone explain me how to actually connect heat pump with thermal collector. just a s basic model would be fine
There is an example 'Type927_v2a' in the Tess Models/Examples/HVAC Library folder of your main TRNSYS directory that shows the temperature on the source side decreasing when the heating control signal is on and temperature on the load side is increasing. Maybe using that example as a starting point will help you find the issue in your own system.
TRNSYS is a highly flexible software that places relatively few restrictions on how components are connected to create systems. One consequence of this flexibility is that it places a lot of responsibility on the user to be intentional about their parameter and input connection choices (even the defaults). I am glad you recognize that the outlet source temperature does not match your expectation, but there are too many variables at play to understand why from screenshots alone. Likewise, asking "how to do it" is too open-ended a question. You need to understand what decisions in your system led to the unexpected result, then decide what changes you will make to correct it.
The online plotter is an excellent diagnostic tool. Plot the source side flow rate into and out of the heat pump, the control signals to your heat pump, and the 'heat transfer from source', 'energy absorbed from source', 'heat pump power' and 'coefficient of performance (COP)' outputs of the heat pump. You can also print outputs to a printer component (which prints to a text file in scientific notation) to see more degrees of precision in the results. The flow rate on the source side in your project may be too high, or maybe the heat transfer from the source is too small. Find the input or another output inconsistent with the expectations, and keep tracing the problem back. Or start from an example like 'Type927_v2a' and make incremental changes, plotting and observing the results after each change, until you find a problem. These are the best ways to understand the problem and find the right solution.
You should also read the full documentation of Type 927 in the HVACLibraryMathematicalReference.pdf, which is the Tess Models/Documentation folder of your main TRNSYS directory.
