[TRNSYS-users] Cooling Load Calculations

[Matt Duffy]

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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