[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [EnergyPlus_Support] The effect of window curtain on heat loss/gain





Sean,
The folks at Transolar (whilst I was doing a training on TrnSys) told us of research that suggested using internal blinds was close to useless in repelling solar heat gain. Whilst I've not read a paper on this, it makes sense intuatively. I would assume a curtain is similar if deployed on the inside.

Mit freundlichen GrüÃ?en- Sent from my iPhone (excuse the brevity)

i. A.
Jean Marais
b.i.g. bechtold
Tel.   +49 30 6706662-23

On 23.01.2014, at 15:34, <seanking.1970@xxxxxxxxxxx> wrote:

 

Hi,

I would like to explore the effect of applying night window curtain on heating loads comparing to the one without night curtain.
Could anybody advise if this is a reasonable practice by using E+? What is the principle if it does generates difference? In my understanding, the blocking of radiation to the sky would be the primary effect (reduce internal air temperature and cool the inside thermal mass as a result), and of course in practical, the curtain will add extra thermal resistance to the window assembly, together with retarding heat convection maybe?
Therefore, I would like to make clear, when adding curtain (I mean applying curtain), does E+ add extra thermal resistance to window assembly and is there any definition/calculation of reducing heat convection effect?
I am sure there won't be a very big change for heating loads, especially when window to wall ratio is small and internal thermal mass is light.
Any comments on above are welcomed.
Sean



__._,_.___


Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.




Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___