[Equest-users] Evaporative cooler modelling

[Sharad Kumar via Equest-users]

Hi Wani,


I believe that the HVAC system has to meet the cooling load as per the
weather condition mainly.

Supposedly the weather conditions are hot in the month of April to July,
henceforth more energy consumption in cooling to meet the demand as per the
requirements.


The fan is constant volume hence constant energy consumption for all the
months.


The cooling consumption mainly depends on the following factors:

1. Type of HVAC system.

2. Fan conditions

3. Weather conditions.

4. Building envelope u values and SHGC.

5. Various Air-side HVAC Cooling inputs.


Thanks,

Sharad.Kumar.

India.



*From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] *On
Behalf Of *Prasad Wani via Equest-users

*Sent:* Thursday, June 15, 2017 8:15 AM
*To:* equest-users at lists.onebuilding.org
*Subject:* [Equest-users] Evaporative cooler modelling



Dear All,



I am modelling Indirect-Direct Evaporating cooling system with *constant
volume *and *continuous *setting. The minimum and maximum supply flow ratio
is *1. *The OA fraction is also 1.



The pump & secondary kW value is *0.00015 kW / cfm. *This parameter is used
for space cooling.



With the above settings, energy consumption for *ventilation fan* is
constant. However, the *space cooling energy consumption *is *different *for
each month. The screenshot is as follows:



[image: Inline image 1]





Why the space cooling energy consumption is *not same for all months *even
when constant value of 0.00015 kW / cfm is given as input?



Kindly guide about this.



Thank you



Regards,



Prasad S Wani


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