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OpenStudio Simulation Went Wrong. Help, Please!

asked 2018-12-08 01:18:45 -0500

wendigoZ's avatar

updated 2018-12-27 10:13:48 -0500

Dear all,

I have been trying to use OpenStudio to do a simulation for my academic project. So far I have followed the step by step tutorial on youtube channel of NRELOpenStudio. I created my model and set my building envelope, construction and so on. The building is 19,075 ft^2 community center in North Territories.

First run, I used ASHRAE 2009 building envelope for a small hotel, and I got a huge total site energy value of 7,605,800 kBtu.

Second run, I modified the building envelope to have higher (much higher) R-value, and I only got a slightly smaller number of 7,605,000 kBtu.

The result also shows that 91% of the energy is used for heating the building. I have no idea what went wrong with the model and other parameters. I have attached my testing model in this post if you would like to take a look. I will appreciate that you can leave any advice or help me out with this.

my testing model:

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answered 2019-01-07 14:54:41 -0500

A quick review of the HVAC system shows a single duct VAV system with reheat with a fixed supply temperature year-round of 12.8C (55F), with the fan operating 24/7 year-round, delivering the design outdoor air flow rate 24/7. My guess is that the outdoor air controls should be scheduled or perhaps you intended to set the Controller:MechanicalVentilation to use demand-controlled ventilation?

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Asked: 2018-12-08 01:17:13 -0500

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Last updated: Jan 07 '19