pre-school simulation and a few basic questions

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Hi all,

My name is Noa and I'm just starting to get to know e-Quest.

I'm doing a research on Passive elements in pre-schools and I have a few
questions:

1. Is e-Quest taking into consideration the relative humidity and does it
have any effect on the results of the simulation?

2. When dose an air conditioner starts to work?

3. Can I insert only the R value of a wall and get good results?

4. is there a list of common values for pre-school air conditioner?

Thank you very much,

Noa Hakak

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Noa,

eQUEST uses the DOE-2.2 building energy simulation program as its simulation "engine".
DOE-2 takes into consideration humidity quite well, and in humid locations latent loads
can be as much as 40% of the total cooling loads. The air-conditioner is controlled with a
thermostat that turns it on when the indoor temperatures exceed the scheduled cooling
control temperature. You can also model natural ventilation (i.e., opening windows in a
residential building) or mechanical ventilation (i.e., an economizer in a commercial
building) when the outside conditions are suitable. In other words, you will be able to
model the building and its air-conditioning system in a very realistic way. As far as
changing the R-value of the walls, that's certainly easy to do, but keep in mind that DOE-2
models the building surfaces in a more detailed method that requires you to input the
thermal characteristics layer by layer (thickness, conductivity, and specific heat). As
for modeling the air-conditioner, DOE-2 allows input for the steady-state or design
efficiency that are then modified hour-by-hour using performance curves based on the
outside air conditions and part-load-ratio. If you don't have
this information, there are default efficiencies and performance curves.

Joe

Joe Huang

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