IES-VE User Forum

Hi,

I am facing an issue with electrical & mechanical spaces when using PRM simulation. In the current project, I have three types of electrical/mechanical spaces which are:

1. Electrical (Thermal Heat Dissipation 25 W/m²)
2. IT Rooms (Thermal Heat Dissipation 500 W/m²)
3. Mechanical Spaces (Thermal Heat Dissipation 0 W/m²)

All three spaces have different thermal heat dissipation (vary more than 31.2 W/m²) but the PRM simulation have one category for all them which is SPACE: Electrical/Mechanical. This leads to do weighted average calculation and results in some spaces having higher heat dissipation than mechanical equipment can handle and vice versa. Is it better to do the following things:

1. Create custom type spaces for three spaces so that baseline/proposed will have space receptacle load and avoid unmet load hours? OR
2. Is there another to way model receptacle loads?

Hello,

You can manually edit the internal heat gains of any zone through the tabular room data menu.

I would create a custom grouping with needed space types, then in Apache, select the desired space type and open up the tabular room data, then in the internal gains tab change the gains as required.

However, if you are going through the ASHRAE 90.1 navigator, make sure that you do the above AFTER you have gone through the Room/Thermal Zone Template data workflow steps, otherwise the data you inputted will be overwritten by the navigator inputs.

Hope this helps.