Abstract
Building envelope in houses is accountable for the enormous heat gain. This numerical study focuses on the influence of lightweight aggregate in the concrete for the heat gain in the building due to the sun’s radiation. Four lightweight aggregates, such as gravel, stalite, lytag, leca and argex were selected for inclusion in concrete and silica fume where it was added to the mortar. Transient thermal characteristics subjected to regular thermal excitation were solved using the admittance method through a computer simulation program. From the result, it is observed that argex concrete wall showed a better thermal performance with a higher time lag (6.218 h) and a lower decrement factor (0.5051). Mortar with silica fume showed a better thermal performance than a mortar with a higher time lag (0.60 h) and a lower decrement factor (0.991).
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Abbreviations
- w :
-
Admittance
- U :
-
Transmittance
- k :
-
Thermal conductivity
- C p :
-
Specific heat
- δ :
-
Decrement factor
- \(\xi\) :
-
Thermal heat capacity
- ρ :
-
Density
- τ :
-
Time lag
- φ :
-
Temperature
- AC:
-
Argex concrete
- ACW:
-
Argex concrete wall
- CP:
-
Cement plaster
- LC:
-
Lytag concrete
- LCW:
-
Lytag concrete wall
- LEC:
-
Leca concrete
- LECW:
-
Leca concrete wall
- M:
-
Mortar
- NGC:
-
Normal gravel concrete
- NGCW:
-
Normal gravel concrete wall
- SC:
-
Stalite concrete
- SCW:
-
Stalite concrete wall
- SFCP:
-
Silica fume cement plaster
- SFM:
-
Silica fume mortar
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Chelliah, A., Saboor, S. (2021). Numerical Investigation of Unsteady Thermal Characteristics of Lightweight Concrete for Energy-Efficient Buildings. In: Ramgopal, M., Rout, S.K., Sarangi, S.K. (eds) Advances in Air Conditioning and Refrigeration. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-6360-7_27
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