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

[Mehdi Shahrestani]

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 at cae.wisc.edu
[mailto:trnsys-users-bounces at cae.wisc.edu] On Behalf Of Matias Garcia
Sent: 01 February 2011 09:17
To: trnsys-users at 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 at 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

 

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