[TRNSYS-users] Cooling Load Calculations

[Kent Beason]

Regarding step 3, how could one monitor the real-time sum of the 8 zones
and then have it report the highest sum value during a simulation? I
believe this would yield a slightly different result than just adding
the max Qcool of each zone, correct? 


Kent E. Beason
Schlitterbahn Development Group
830-743-2464
-----Original Message-----
From: Matt Duffy [mailto:duffy at tess-inc.com] 
Sent: Thursday, December 18, 2008 11:07 AM
To: #TEO NGUAN TECK#; trnsys-users at cae.wisc.edu
Subject: Re: [TRNSYS-users] Cooling Load Calculations

Dear Nguan Teck,

That sounds like a good approach. Make sure you remember that the NTYPE
Output, QCOOL is a power in units kJ/hr. Also, for system sizing, make
sure you maintain a constant temperature in your zone(s). The reason for
this is if you have an instantaneous temperature step in TRNBUILD, it
requires more instantaneous energy or power to bring the air temperature
to setpoint. To clarify, please see the attached *.jpg that I made for a
client.


Best regards,

Matt Duffy

----- Original Message -----
From: "#TEO NGUAN TECK#" <z050128 at ntu.edu.sg>
Sent: Thu, December 18, 2008 2:35
Subject:[TRNSYS-users] Cooling Load Calculations


Hi ALL,



I would like to use TRNSYS to calculate the cooling load of my building
model
(altogether 8 zones), instead of traditional methods. I have carried out
the
following steps and would like to know if I am correct:



1)      I used the cooling available in TRNBuild and set the Room
Temperature
Control to 25 deg C (unlimited power).

2)      I retrieved the data (QCOOL) and determine the max QCool
required
for each
zone (by sorting the data using excel).

3)      I subsequently summed all the maximum QCool from the 8 zones.



The final value (ie from step 3) will be used to determine the cooling
capacity of
my equipment (which is a chilled water cooling system).



Are my steps correct? Or can anyone provide me a better approach?



Any help is deeply appreciated!



Nguan Teck

Undergrad

Nanyang Technological University, Singapore

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