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RE: [EnergyPlus_Support] cooling load

Tek
Since the building you are modelling is in a hot climate (equator) and there are no heating loads , only airconditioning through out the year , The insulation would have negative effect. Infact your building would be heating up all day and will not be able to lose the heat due to insulation. This approach is suitable for cold climates. The explaination given by Rohini in email earlier justifies it well.
 

Thanks

Rahul Chillar

Grad Research Assistant

Building Systems Lab

University of Illinois UC



Rohini Brahme <rbrahme@xxxxxxxx> wrote:
The reason could be that the heat from inside the building now has more difficulty in going out by conduction. This usually happens in office buildings which are dominated by internal loads and solar loads through windows. One way to check if this is true is to compare the internal temperatures without the system in the two cases. My guess is that the internal temperatures would be higher with insulation, and that these temperatures are higher than outside temperature on average. If you have enough air exchange with the outside (either by infiltration, or natural ventilation) then these numbers will be closer to the outside temperature. Also, make sure that the heating load is decreasing.



Rohini

      -----Original Message----- 
      From: teklay Weldeabzgi [mailto:teklay1979@xxxxxxxxx] 
      Sent: Mon 7/5/2004 6:16 AM 
      To: EnergyPlus_Support@xxxxxxxxxxxxxxx 
      Cc: 
      Subject: [EnergyPlus_Support] cooling load
      
      
      
      when i simulate a ground plus one office building i
      gokt some confusing result due to insulation in the
      roofs. the roof in the upper floor is corregated iron
      sheet and a chip wood ceiling with an air space b/n
      them. when i see the annual cooling load for this base
      case and inserting an insulation just below the iron
      sheet the cooling load with insulation is greater than
      the cooling load with out insulation. but i doubt this
      result is correct b/c using insulation is to reduce
      the cooling load, but in my case it increases.
      can any one what will the possible reason. i have
      checked my idf file but i can't find any error.
      
      thanks
      tek 
      
      
                  
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Thanks 
Rahul Chillar 
Grad Student 
Building Systems lab
Univ Of Illinois Urbana Champaign

		
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