[esp-r] Re: negativ energy saving

[Jon Hand]

There are several reports in the results analysis tool which can help.

ESP-r provides an energy balance report at the zone air point so you can find
out all of the gains and losses over a period of time. And the same can be
done for each surface in the model over a period of time. 

And what also helps is to have a base case model which is the same
except for the the better glazing or insulated walls.  Then you can do
a side-by-side comparison of performance (if you have a big monitor
you can run res on both sets of results file simultaneously). Hints on
how to use res are in a chapter of the ESP-r Cookbook.

-Jon Hand
________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] on behalf of Achim Geissler [achim.geissler at intergga.ch]
Sent: 21 April 2014 16:28
To: esp-r at lists.strath.ac.uk Club
Subject: [esp-r] Re: negativ energy saving

Dear Gul,

as always, some questions in regard to your model: are you heating and cooling? Is the overall consumption (for the whole year) as expected? What type of climate (heating, cooling, "neutral") are you considering?

Some ideas: the triple glazing will have a lower g-value (SHGC), thus it may be possible that (for low overall loads) due to reduced solar gain slightly (?) higher heating loads can result. Also, due to higher level of insulation, there may be hours in which again due to solar loads a higher cooling load can result. Do you have solar control (blinds) active?

Best
Achim

On Apr 21, 2014, at 10:19 AM, Gül Nihal Güğül <gulgugul at yahoo.com.tr<mailto:gulgugul at yahoo.com.tr>> wrote:

Dear All,

My question is about enegy saving when changing the glass or insulation material in a model house.

I have done some schenarios. For example, the model house has 12 mm air filled double glass, and I changed this material with 12 mm air filled triple glass. And in another schenario I changed the thickness of insulation material. The model house has 80 mm insulation and I changed this with 120 mm insulation, also I changed the "k" value of insulation material.

I compared the hourly simulation results. In some hours,

-energy consumption of the model in triple glass was more than the energy consumption in double glass
-energy consumption of the model in 120 mm insulation was more than the energy consumption in 80 mm insulation.

Is it possible? or does it mean that there is something wrong in the model?

Thank you so much for your help.

Best

Gul


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