[TRNSYS-users] geothermal pump strange behavior when connected to asimple heat exchanger

[Matt Duffy]

Dear Ordoumpozanis Konstantinos,

Perhaps a fan and coil would work better than a typical heat exchanger. 
Also make sure the input ventilation flow rate to Type 56 is in ACH and
not kg/hr.


Best regards,

Matt Duffy


----- Original Message -----
From: ordoumpoz at uowm.gr
Sent: Fri, September 19, 2008 15:05
Subject:[TRNSYS-users] geothermal pump strange behavior when connected to
asimple heat exchanger


Hi



I have modeled a simple geothermal heat pump according to the example of
Geothermal Application of Tess Library. The only changes that I have  made
is that I have a water to water geothermal heat pump (type 668). The system
seems to work correctly. The load loop seam to augment 4 C and the ground
loop reduce 18 C when the system is On in heating mode.



I tried to connect this system to building56 as a ventilation system so I
apply in between a heat exchanger of  any type ( type 91, 5g, 5e, 5a, 5e),
so the system gets 75% of fresh air and 25% of recycled air heated in the
water to air heat exchanger and go ventilation system of building.  The
results that I get is absolutely wrong. After the connection of the
geothermal heat pump with the building the ground loop of the G.H.P. reached
the 100-300 C.  and the air to the building seem to be cooled.



I checked the ghp system alone and seem to work

I checked the heat exchanger alone and seem to work

I checked the building alone and seem to work



But the connection is absolutely wrong



Could someone suggest me anything that might be wrong. ?



Thank you













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----- End of original message -----