Thermal Mass Cooling

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Yi Li

October 30, 2019 22:55

Hi all, 

 

I am a bit confused while reading the ASC. I understand how thermal mass works for absorbing the heat during the day and releasing it at night too warm up the space. (passive solar heating) However, I dont quite get how this strategy work for thermal mass heating. so we need night time ventilation to cool down the thermal mass - but how is this cooling down the room? 

 

Can anyone please help me with this?

 

Thanks in advance, 

 

 

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  Mitulkumar Patel October 31, 2019 00:48

  you are assuming the temperature will drop at night and because heat always moves from hot to cold, the mass that has been collecting heat all day will radiate heat out to the cooler room thus heating it. hope it helps.

   

  -Mitul

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  Yi Li October 31, 2019 04:18

  Thanks. But isn’t this a system for heating instead of cooling ?

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  Mitulkumar Patel November 14, 2019 02:22

  Yi, sorry I miss understood your question. If you look at page 229, They are placing thermal mass in the ceiling to collect the heat and then they are moving cold air across a mass to cool the room and chimney affect to move the hot air out.

  To be honest in my opinion the system would work more efficiently without the thermal mass. By blowing air directly into the room you can remove voc along with heat.

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