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Any equivalent data with Annual peak cooling load in hourly data

asked 2020-03-05 20:03:41 -0600

katsuya.obara gravatar image

updated 2020-03-05 20:20:00 -0600

I ran simulation with HVACTemplate:Zone:IdealLoadsAirSystem.
When I checked peak cooling load in html output, it is around 2100kW(pic1).
I wanted to check this cooling load to whole building in hourly data.
I checked hourly data for Zone Ideal Loads Zone Total Cooling Rate summing up for all zones.(pic2)
However, value is much smaller than 2100kW.
I wonder are there any hourly data item which is equivalent to annual peak cooling load in pic1?

pic1
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pic2
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Comments

Hi Katsuya. Have you tried only running the annual simulation and excluding the sizing periods from your run period? I could be wrong, but I would then expect the Cooling Maximum Value to be pulled from your annual simulation (and match the peak from your plot) instead of from the design day.

jbatt gravatar image jbatt  ( 2020-03-06 13:21:06 -0600 )edit

I agree with @jbatt. We know that the way of E+ to calculate is in dynamical way which means it will start from your running period. And the temp. internal load will affect the real states of the building when it calculate till your short running period. How can you get the annual/peak cooling value? From report? I did E+V8.7, but it does not have.

Lantonshen gravatar image Lantonshen  ( 2020-08-25 13:12:47 -0600 )edit

Will DistrictCooling include latent cooing load?

Lantonshen gravatar image Lantonshen  ( 2020-08-25 13:17:06 -0600 )edit

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answered 2020-03-06 09:19:07 -0600

Your result of 2100 kW is during the design day. Normally, weather and schedules are different than the conditions during your yearly EPW RunPeriod. While such a drastic difference should not be expected, I would check the difference in schedules for your internal gains for the design day and the run period. Normally internal gains are scheduled to be 100% during the design day, but less than 100% during normal operation.

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Asked: 2020-03-05 20:03:41 -0600

Seen: 81 times

Last updated: Mar 06 '20