Optimum insulation thickness for external walls on different orientations considering the speed and direction of the wind

Axaopoulos, Ioannis; Axaopoulos, Petros J.; Gelegenis, John

doi:10.1016/j.apenergy.2013.12.008

Cited by 57 publications

(22 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the cases with different insulation thicknesses for the different orientated surfaces, the south wall is the one with the minimum thickness. The north wall is the one presenting the largest insulation thickness in [30] and in our analysis (for the optimal economic solution), while in other studies this is not the case. In [27,84] the north wall is the one presenting the thinnest thickness, probably because in these locations (Tunis and Riyadh) the temperatures during the summer months are extremely hot.…”

Section: Discussioncontrasting

confidence: 52%

“…Previous approaches for optimizing the insulation thickness considered only cooling loads [18][19][20], heating loads [21][22][23][24][25] or both cooling and heating loads [26][27][28][29][30], but neglected the impact of the construction materials. In addition, to find the energy loads, most of these studies applied the degreedays methodology [18,23,[31][32][33], a heuristic approach that due to its narrow scope might lead to suboptimal alternatives.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-objective optimization of thermal modelled cubicles considering the total cost and life cycle environmental impact

Carreras

Boer

Guillén‐Gosálbez

et al. 2015

Energy and Buildings

View full text Add to dashboard Cite

Energy efficiency strategies, such as building insulation, improve the building performance without compromising comfort. This study presents a methodology for determining the optimal insulation thickness for external building surfaces. Our approach is based on a multi-objective optimization model that minimizes simultaneously the cost and environmental impact associated with both the energy consumption over the operational phase and the generation of the construction materials (including the waste produced during the disposal phase). The thermal loads of the modelled cubicles were calculated using EnergyPlus, a widely used simulation program for buildings. The environmental impact was quantified following the life cycle assessment (LCA) methodology. This methodology was applied to a case study of a house-like cubicle located in Lleida (northeast Spain). Taking as a basis a standard cubicle without insulation, our approach identifies solutions that reduce around 40% both, the 2 cost and environmental impact. Optimal solutions show also important economic and environmental improvements compared to cubicles constructed with the Spanish legislation requirements. Our method is intended to assist decision-makers in the design of buildings.

show abstract

Section: Discussioncontrasting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of thermal modelled cubicles considering the total cost and life cycle environmental impact

Carreras

Boer

Guillén‐Gosálbez

et al. 2015

Energy and Buildings

View full text Add to dashboard Cite

show abstract

“…A literature review of building envelope design can be found in [12]. Some authors optimised the thermo-physical properties [13,14] or insulation thickness [15][16][17][18][19] of the opaque envelope. Other researches studied optimal Window-to-Wall Ratio (WWR) configurations [20,21] or combined an optimisation of thermo-physical properties and WWR [12,[22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

The early design stage of a building envelope: Multi-objective search through heating, cooling and lighting energy performance analysis

et al. 2015

View full text Add to dashboard Cite

“…As a result, the north façade was designated as the most economical among the others. Taking the speed and direction of the wind into account, Axaopoulos et al [5] conducted a study to determine the optimum insulation thickness according to the directions and building materials during the heating and cooling seasons. As a result of calculations based on three different building materials and different directions, they observed that the optimum isolation thickness varies between 7.10 and 10.10 cm.…”

Section: Introductionmentioning

confidence: 99%

Analysis of optimum insulation thickness for external walls at different orientations based on real-time measurements

et al. 2020

View full text Add to dashboard Cite

In this study, the optimum insulation thickness was calculated for the heating season for external walls in the different directions of a building. For this reason, a building used for housing in Istanbul, Turkey was taken as model. The indoor and outdoor temperatures, along with the interior and exterior surface temperatures of the building's external walls, were continuously measured using thermocouples and recorded in four different directions throughout the year. The effects of solar radiation, which vary based on the direction, were assessed for the heat transfer through the external walls. The results of this study indicate that the optimum insulation thickness for the north, south, west, and east facing walls should be 6.47, 2.87, 6.97, and 6.98 cm, respectively, based on the differences in the amount of solar radiation exposure of the walls in the different directions. The optimum insulation thickness of the building's external wall was calculated as 5.25 cm, regardless of its direction. An economic analysis of the thermal insulation cost was conducted using the P 1-P 2 method, and then the payback periods were calculated. The heating energy consumption of the building designed using the optimum insulation thicknesses, as identified separately based on the direction, decreased by 17%, compared to the present building with 3 cm of thermal insulation.

show abstract

Optimum insulation thickness for external walls on different orientations considering the speed and direction of the wind

Cited by 57 publications

References 33 publications

Multi-objective optimization of thermal modelled cubicles considering the total cost and life cycle environmental impact

Multi-objective optimization of thermal modelled cubicles considering the total cost and life cycle environmental impact

The early design stage of a building envelope: Multi-objective search through heating, cooling and lighting energy performance analysis

Analysis of optimum insulation thickness for external walls at different orientations based on real-time measurements

Contact Info

Product

Resources

About