HAP: basement wall input

[wufi2004]

How to define basement walls in HAP(Hourly Analysis Program)?

I know how to input data for space above ground, but how to do it for basement walls?

 

[tofossi]

Basement walls are defined just like a wall next to an un-heated space. Define the thermal properties and the temperature differential. Since most ground temperatures are around 50 F. use this as the temp for the un-heated space.

 

[wufi2004]

Thank you!

But i will use winter heating in the basement. Then how to do it?

Can i define basement floor ? I found this. But i need to know which slab is slab-on-grade, which slab is slab-below-grade. How to differentiate them?

 

[wufi2004]

I know what you mean. Thanks!

 

[walkes]

To define the basement walls you have to use slab below grade. When you do that more options will be shown for both floor and wall r-values. The basement wall construction is not as detailed as the typical wall construction that you would input into the library section in the program.

 

[lilliput1]

See Carrier Handbook of Air Conditioning System Design, Chapter 5, Page 1-81.

 

[wufi2004]

My basement wall is like this:


_______________________________________ Ground Level
| Basement 1 |
|________________| <---- What is this slab floor called?
| Basement 2 |
|________________| <---- This is slab-on-grade or -below-?
+ +

Besides, I'm trying to find the Carrier Handbook. Thanks!

Please give me more hint.

 

[NNACons]

Using HAP i would deal with your scenario in the following manner.

Basement 1 - shares a common floor / ceiling with Basement 2 and common floor / ceiling with Ground level.

I would treat Basement 1 floor and ceilings as partions, in fact i would treat all walls this way too, just choosing for floor tab (above conditioned space).

Basement 2 - shares a common floor / ceilgin with Basement 1 but has a slab below grade.

I would treat all the walls and the ceiling to basement 2 as partitions and enter the slab below grade details for this level into the floor tab.

One way of dealing with your dilemma..