Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   FEBRUARY 2017 , Volume 16 , Number 11 #F0072; Page(s) 23 To 34.
 
Paper: 

STUDY THE IMPACT OF CAULKING MODERN WINDOWS ON AIR INFILTRATION RATE AND INDOOR AIR QUALITY

 
 
Author(s):  HAKIMIRAD DANIAL, MOHAMMAD KARI BEHROUZ, MAEREFAT MEHDI*
 
* DEPARTMENT OF MECHANICAL ENGINEERING, TARBIAT MODARES UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

Nowadays, modern windows with standard caulking are used in most buildings. Study of air infiltration and caulking these windows in several ways such as energy, indoor air quality, thermal comfort and pollution entering in the building is important. This study consists of two parts, first the airtight performance of various window gaskets is experimentally investigated. For this purpose, 8 different types of gaskets are used and modern window gap is simulated, and air infiltration rates are measured at different pressure differences. The results show that the airtight performance of various gaskets is different. Also, experimental results are fitted by power law equation, and relations and coefficients are used to calculate air infiltration rate of modern windows (sealed windows), respectively. In the second section due to the very low air infiltration rate of the experimental results, indoor air quality is assessed by numerical modeling methods. In the sample model, air infiltration of modern windows as ventilation and human breathing as a source of CO2 is simulated. Indoor air quality is weighed by the CO2 concentration in the interior space. The results show that the air infiltration of window gaps to ensure air quality during the 8 hours is insufficient. Then, assuming uniform distribution of CO2 in the sample space, and solving the transfer species equation for the problem situation, analytical equation for evaluating indoor air quality were achieved. Analytical results match numerical simulation results exactly. The results of this study can be very useful for HVAC engineers.

 
Keyword(s): AIR INFILTRATION, MODERN WINDOWS, AIR SEALING, INDOOR AIR QUALITY IAQ, CO2 CONCENTRATION
 
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