Is there a way to force HAP to supply a constant air flow through a "system"
(this includes specifying return air and outside air requirements) and
calculate the cost of providing the cooling and heating water to the "system"
and "zone" reheats? Any explanations would be helpful.
Thanks,
Matthew Kimball
**LEED Green Associate
Piping Designer II
Jacobs Engineering Raleigh
110 Corning Rd. Suite 2500
Cary, NC 27518
919-859-5019 office
574-265-3193 cell
919-859-5151 fax
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Dear Kimball,
I guess you can force HAP to supply constant flow in the system by changing the cooling coil setting to supply l/s instead of supply temp. as attached below:
[cid:image001.jpg at 01CAC536.13AF4580]
Regards,
Toufic
You can specify a constant volume system under your "general" tap. Make sure if you are using chilled water select "Chilled Water Air Handling Units" under Equipment Type. Then select CAV single zone or terminal reheat (dependant on your situation) in the Air System Type. Under the "sizing data" tap you can select "user define", then specify your supply air and ventilation CFM's.
In order to determine cost for heating and cooling water you will need to construct a building to be simulated. Thus you will need to create a chiller and boiler plant and specify all pump requirements. Then implement these into your building.
Brendan
Anyone care to analyze what I am doing below and tell me why I'm not getting
a terminal heating coil load when I run a simulation on the system? Thanks,
Matt.
HAP will not size your reheat coil because you specified "user-
defined" sizing. Use computer sizing and it will size it.
Regards,
Craig J. Gann, P.E.; LEED AP
www.EnergySimulators.com
Sent from my iPhone
I am not looking for HAP to size, I just want to know the btu output from the
coils. It gave me preheat coil btu's and cooling coil btu's, but not reheat
btu's.
-----Original Message-----
Matt,
Am not sure what kind of system you are sizing, CAV reheat or VAV,
however HAP will size the reheat coil to provide reheat of the supply
air at your min setting (2 ACH) which you have set to 55F plus any
additional heat needed to warm the zone to 57F (60-3), which is
heating Tstat - throttling range. The "zone sizing summary" report
will indicate the reheat coil load. Given that you have such low Tstat
setpoint there may be very little zone heat required. Hope this helps.
BTW, you should just call Carrier software support with questions as
this is free provided you have a license. 800-253-1794.
-Craig
Sent from my iPhone