This paper describes an experimental investigation of the thermal performance of four Australian domestic walling systems(cavity brick,insulated cavity brick,insulated brick veneer and insulated reverse brick veneer)h...This paper describes an experimental investigation of the thermal performance of four Australian domestic walling systems(cavity brick,insulated cavity brick,insulated brick veneer and insulated reverse brick veneer)having various combinations of thermal insulation and of thermal mass location within the wall.This experimental analysis extends further the previous studies of the benefits of thermal mass on the overall thermal performance of building enclosures(Gregory et al.2008,Luo at al.2008,Alashaary et al.2009).The comparison is based on the time required to maintain thermal comfort for free-floating internal conditions.The results clearly show that internal comfort levels are influenced by both the thermal resistance of the walls as well as the extent and location of the thermal mass,with neither parameter being the sole predictor.The best thermal performance is therefore obtained by an appropriate combination of thermal mass and resistance,rather than focussing on the overall wall thermal resistance(R-value)alone.A new approach of density temperature plots for comparison of temperature variation is also used in the assessment of module thermal performance.展开更多
The determination of internal building air temperature has an impact on the design and performance of a building in measuring thermal comfort and heating and cooling loads.There is software to assist with measuring in...The determination of internal building air temperature has an impact on the design and performance of a building in measuring thermal comfort and heating and cooling loads.There is software to assist with measuring internal building air tem-perature such as Autodesk CFD simulation.However,the use of Autodesk CFD simulation for the analysis appears to have an issue with simulations extending over a long term(i.e.months or years)as the internal air temperature in a building keeps rising with time.This paper addresses the challenges encountered using CFD simu-lation in the modelling of a building for long term performance.A new method to overcome the issue of the progressive rising of internal air temperature using two external air boundaries,one for the external volume(sky boundary)and the other surrounding the building,is suggested in the paper.展开更多
基金supported by the Australian Research Council(LP 120100064)。
文摘This paper describes an experimental investigation of the thermal performance of four Australian domestic walling systems(cavity brick,insulated cavity brick,insulated brick veneer and insulated reverse brick veneer)having various combinations of thermal insulation and of thermal mass location within the wall.This experimental analysis extends further the previous studies of the benefits of thermal mass on the overall thermal performance of building enclosures(Gregory et al.2008,Luo at al.2008,Alashaary et al.2009).The comparison is based on the time required to maintain thermal comfort for free-floating internal conditions.The results clearly show that internal comfort levels are influenced by both the thermal resistance of the walls as well as the extent and location of the thermal mass,with neither parameter being the sole predictor.The best thermal performance is therefore obtained by an appropriate combination of thermal mass and resistance,rather than focussing on the overall wall thermal resistance(R-value)alone.A new approach of density temperature plots for comparison of temperature variation is also used in the assessment of module thermal performance.
基金supported by the Australian Research Council(LP 120100064)Think Brick Australia and their support is gratefully acknowledged.
文摘The determination of internal building air temperature has an impact on the design and performance of a building in measuring thermal comfort and heating and cooling loads.There is software to assist with measuring internal building air tem-perature such as Autodesk CFD simulation.However,the use of Autodesk CFD simulation for the analysis appears to have an issue with simulations extending over a long term(i.e.months or years)as the internal air temperature in a building keeps rising with time.This paper addresses the challenges encountered using CFD simu-lation in the modelling of a building for long term performance.A new method to overcome the issue of the progressive rising of internal air temperature using two external air boundaries,one for the external volume(sky boundary)and the other surrounding the building,is suggested in the paper.
