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Re: [TRNSYS-users] Ahu coupled with a secondary heating / coolingsystem



Matias

 

There are some points which should be considered.

You did not mention which cooling/heating load you are monitoring. 1-Cooling/heating load of type 56 or 2-cooling/heating load of type 56 plus cooling/heating load of external coil (in AHU).

 

If you are monitoring the first one and your supply air temp is equal to room set point definitely you could not see any difference.

If you are monitoring the second one you should see difference.

 

Apart from that it seems that you are supposing to have supply air equal to room temp. If I am right I should say that this assumption is not true and supply air should be roughly in 10 difference from room temp.

 

Hope it helps

Regards

Mehdi

 

 


From: trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu] On Behalf Of Matias Garcia
Sent: 01 February 2011 09:17
To: trnsys-users@cae.wisc.edu
Subject: Re: [TRNSYS-users] Ahu coupled with a secondary heating / coolingsystem

 

Dear Trnsyws users,

I forgott to say that the supply air temperatures from the AHU are 20°C for winter and 18°C for summer. i could understand that there is no change in winter as my set point is 20°, but in summer with a set point temperature between 24-28°C there should be a difference on the cooling load when sending more or less air

2011/2/1 Matias Garcia <matias.garcia0@gmail.com>

Dear Trnsys users,

I am simulaitng an AHU coupled with a secondary system for heating and cooling. For the secondary system I am using the heating and cooling type manager from Type 56. What I obtain is independtly from the air change rate imposed by the mechanical ventilation, the cooling and heating loads of the type manager remain the same. Are the heating and cooling type managers not adequate to simulate this or I am doing something wrong?

Thanks in advance!

Matias