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No module named " No module named 'hvac.heat_exchanger.recuperator'" #9
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I've tried to reproduce your problem, but I haven't encountered any problem. Below are the steps that I took. You need the program Poetry installed on your computer to set up the project's virtual environment. The Python IDE I use, is PyCharm Professional (version 2024.2).
Another possibility (after unzipping), that doesn't need Poetry (or PyCharm), could be to only copy the wheel-file "python_hvac-0.1.2-py3-none-any.whl" (i.e. the most recent version) from the "dist" folder. Create your own new project folder with an associated virtual environment and then copy-paste the wheel-file into this project folder. After activating the associated virtual environment, run "pip install python_hvac-0.1.2-py3-none-any.whl" in this folder. This will install all the dependencies in the virtual environment. After that, you can copy-paste the examples into your project folder. Normally, they should run (at least they do on my computer). |
Hi, Tom:
Thank you so much for your response. I don't have Pycharm, but I was able
to upgrade Anaconda and use Spyder to install the package. I was able to
run the example without any hitches. I really appreciated the feedback you
provided.
A few follow up questions on the example itself:
1. The use case in "air_cooling_coil_01.ipynb" is focused on using water
to cool air. For my use case, I also want to use air to cool water. I tried
to simply update the water inlet temperature to be higher (40C) than the
air inlet temperature (27C). but that did not work. The script gave me this
error: "ValueError: Humid air state cannot be determined: parameter h is
NaN or None." It seems this is because the script is using "humid air",
whereas in a case where the water temperature is higher than the air
temperature, the air would essentially be dry. Any suggestions on how to
make the reverse case work?
2. For my use case, I know the heat load as an input, along with the water
inlet and outlet temperature. My unknowns are the mass flowrate and the
corresponding air temperature. Do you have a script that does this version?
If not, I can use your script iteratively to make it do the analysis.
Regards,
Mudasir
…On Fri, Aug 16, 2024 at 3:14 AM Tom Christiaens ***@***.***> wrote:
I've tried to reproduce your problem, but I haven't encountered any
problem. Below are the steps that I took. You need the program Poetry
installed on your computer to set up the project's virtual environment. The
Python IDE I use, is PyCharm Professional (version 2024.2).
1. From the project main page on GitHub, download the project in a ZIP
file on your computer (see the green button "<> Code"). The ZIP file will
be named "python-hvac-master.zip".
2. Unzip the ZIP-file "python-hvac-master.zip" on your computer. This
should create a folder "python-hvac-master" on your computer, within it
another folder which is also called "python-hvac-master".
3. Copy (or cut) this last folder into your own projects directory.
4. Open the project folder "python-hvac-master" in your projects
directory with PyCharm. Normally, PyCharm will automatically detect that
there is a "pyproject.toml" file present in the project folder and it will
propose to setup the Poetry virtual environment for you.
5. Accept this and when PyCharm is ready, you should be able to run
the Python scripts and Jupyter notebooks in the projects
docs/examples-folder.
Another possibility (after unzipping), that doesn't need Poetry (or
PyCharm), could be to only copy the wheel-file
"python_hvac-0.1.2-py3-none-any.whl" (i.e. the most recent version) from
the "dist" folder. Create your own new project folder with an associated
virtual environment and then copy-paste the wheel-file into this project
folder. After activating the associated virtual environment, run "pip
install python_hvac-0.1.2-py3-none-any.whl" in this folder. This will
install all the dependencies in the virtual environment. After that, you
can copy-paste the examples into your project folder. Normally, they should
run (at least they do on my computer).
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Great library, thank you for sharing! I was able to install the python package, but when I can the example code from air cooling coil example 1, I get the error about the heat_exchanger.recuperator module not being available.
Could you please help?
Code snippet below:
import warnings
from hvac import Quantity
from hvac.fluids import HumidAir, Fluid, CoolPropWarning
from hvac.heat_exchanger.recuperator.fintube.continuous_fin import (
PlainFinTubeAirToWaterCounterFlowHeatExchanger
)
warnings.filterwarnings('ignore', category=CoolPropWarning)
Q_ = Quantity
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