[esp-r] Yan: Re: negatif energy saving

[Gül Nihal Güğül]

Hi Lars,
 
My building is located in a cold climate. winter temperature is between -10 and 10 oC. And I just have energy demand for heating the building, there is no cooling. 
 
In insulation schenario there is not too much negative values but when I change double glass with triple glass there are too much negative values, that is 5% of the hours energy demand in triple glass is more than in double glass, during one year.
 
In fact I also tried this in a very simple model with one room, in order to see if I have something wrong with my model, I also had some negative values in triple glass schenario.
 
Thanks for your help
iyi çalışmalar 
Best wishes
 
Gul
 
21 Nis 2014 18:29 Pazartesi tarihinde Lars O. Grobe <grobe at gmx.net> şöyle yazdı:
  
Hi Gül,

where is the building located, and what kind of energy demand do you
observe? If you have an actively-cooled building in a climate with high
temperatures during the day and low temperatures during the night,
increasing the insulation without air exchange during night hours might
actually lead to an increase in energy demand. So a controlled
ventilation should drastically improve this...

Cheers, iyi çalışmalar,
Lars.


> 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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