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Re: [TRNSYS-users] Type91 hot/cold side
Dear Amandine,
'Hot' and 'Cold' are just labels for two streams. Perhaps, we should
just called them 'stream 1' and 'stream 2'. You can give a high
temperature to the stream labeled as 'cold' without problems. In this
type, the user specifies the effectiveness, so the type does not care
about the configuration of the heat exchanger (parallel flow, cross
flow, etc.).
The model is very simple, and is based only on energy balance. You have
to make sure that the temperatures of the outlet streams are reasonable,
i.e., the outlet temperature of the stream that had a higher inlet
temperature should be higher than the temperature of the other stream.
Best regards,
Diego
Amandine LE DENN wrote:
Dear TRNSYS users,
I am using Type91 as heat exchanger; I am afraid of misunderstanding
what are "Hot side" and "Cold Side".
Is it a matter of temperatures' levels ? then what happen when both
parts need same temperatures?
or is it a matter of primary system and secondary system (one is on
the left side, the other is on the right side) ?
Thank you for your answers,
Kind Regards,
Amandine LE DENN
INSA Toulouse
Mel: amandine.le-denn@tecsol.fr <mailto:amandine.le-denn@tecsol.fr>
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Diego A. Arias
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Solar Energy Laboratory
University of Wisconsin - Madison
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