[Hap-users] Time of Design Peak Load

[Khaled Fouda]

Hi Kate,

This isn't very odd, although the typical peak cooling load would occur in July but there are other factors that would affect this such as building rotation, envelope materials, ventilation type, infiltration rate, occupancy schedules (holidays)...etc

The sun path over the Fall faces the side walls of the building more than it would in the Summer when the sun path is more perpendicular to face the roof. For example; if you have a well-insulated roof and walls with bad U-value materials then you should expect a higher heat loss in the Fall due to heat loss by convection = Higher Cooling Load.

This also depend on the location of the project, in some hot areas the climate temperature doesn't differ much in Sept from July.

I hope this help.

Regards,
Khaled Fouda, LEED GA
Integrated Energy Concepts Engineering, P.C.

Rochester Office:
3445 Winton Place, Suite 240
Rochester, New York 14623
Phone:    585-272-4650 ext.29
Toll Free: 866-666-4626
eFax:      718-228-5154
kfouda at nrg-concepts.com<mailto:kfouda at nrg-concepts.com>
[linked in]<https://www.linkedin.com/company/integrated-energy-concepts-engineering-pc?trk=nav_account_sub_nav_company_admin>

From: Hap-users [mailto:hap-users-bounces at lists.onebuilding.org] On Behalf Of Kate Mayberry
Sent: Tuesday, March 22, 2016 8:35 AM
To: hap-users at lists.onebuilding.org
Subject: [Hap-users] Time of Design Peak Load

Hi,

I don't know if this has happened to anyone else in their HAP calculations. But I built a project in HAP, and the cooling design peak load is occurring at September (with small loads) when it normally should be occurring in July. I am not sure why the calculations are doing that. Has anyone else run into this problem?


Thanks and Regards,

Kate Mayberry

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/hap-users-onebuilding.org/attachments/20160322/53523197/attachment-0003.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.gif
Type: image/gif
Size: 1295 bytes
Desc: image001.gif
URL: <http://lists.onebuilding.org/pipermail/hap-users-onebuilding.org/attachments/20160322/53523197/attachment-0003.gif>