Direct Incorporation of Butyl Stearate as Phase Change Material into Concrete for Energy Saving in Buildings

Cellat, Kemal; Beyhan, Beyza; Kazanci, Berk; Konuklu, Yeliz; Paksoy, Halime

doi:10.18178/jocet.2017.5.1.345

Cited by 37 publications

(19 citation statements)

References 12 publications

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“…Incorporation of microencapsulated PCM in gypsum boards [22] resulted in a 4K reduction in the indoor room temperature [23]. Micro-encapsulation of PCM as metallic/polymeric containers in building materials is costly and may influence the mechanical quality of the structure material when get harmed during blending [24,25]. Butyl stearate as PCM and stabilized silica sol as an economically friendly silica source (ss).…”

Section: Introductionmentioning

confidence: 99%

Improving Thermal and Mechanical Property of Lightweight Concrete Using N-Butyl Stearate/Expanded Clay Aggregate with Alccofine1203

Kulkarni

Muthadhi

2020

IJE

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energy is increased by 2.4 to 3.2% per year from 2015 to 2040 [1]. Energy savings in the residential or commercial sector using different materials for thermal energyefficient buildings has given a new scope for research. A general idea amidst the energy-efficient building design strategies is to increase the thermal mass of the building materials which can store the thermal energy during day time and release the energy at night. This can ultimately save energy consumption in building sectors and reduce

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Section: Introductionmentioning

confidence: 99%

Improving Thermal and Mechanical Property of Lightweight Concrete Using N-Butyl Stearate/Expanded Clay Aggregate with Alccofine1203

Kulkarni

Muthadhi

2020

IJE

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“…The mechanical strength was measured as 40 MPa for 5 wt% BS dosage. 9 For up to 5 wt% BS dosage in concrete mixture, the mechanical strength result of 40 MPa was within the allowable limits of recommended structural classification. 30 The corrosion behaviour of steel embedded in concrete with (5 wt%) BS additive was tested in 3.5 wt% NaCl solution for the application of building structure.…”

Section: Electrochemical Measurementsmentioning

confidence: 53%

“…Optimal dosage of BS as PCM was found as 5 wt% according to compressive strength measurements. The mechanical strength was measured as 40 MPa for 5 wt% BS dosage . For up to 5 wt% BS dosage in concrete mixture, the mechanical strength result of 40 MPa was within the allowable limits of recommended structural classification .…”

Section: Resultsmentioning

confidence: 77%

“…These results show that multiple benefits can be expected from adding BS to concrete mixes. In addition to corrosion retarding behaviour of BS, it can also provide low water permeability due to its hydrophobicity and enhance the thermal performance of concrete with a high latent heat …”

Section: Resultsmentioning

confidence: 99%

“…In addition to corrosion retarding behaviour of BS, it can also provide low water permeability due to its hydrophobicity 8 and enhance the thermal performance of concrete with a high latent heat. 9 The amount of Fe 2+ in electrolyte from rebar-Ref and rebar-BS was calculated by ICP-OES. i corr value was calculated based on the amount of Fe 2+ ions in electrolyte by applying the Faraday law.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

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Comprehensive investigation of butyl stearate as a multifunctional smart concrete additive for energy‐efficient buildings

et al. 2019

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Summary Using of phase change materials (PCM) for increasing energy savings in sustainable buildings is receiving a lot of interest in commercial applications. Butyl stearate (BS), as PCM, can be used to maintain ambient temperature in the human comfort zone and prevent temperature fluctuations by enhancing the thermal properties of concrete. The long‐term effects of BS on concrete are not well known. In this study, the applicability of BS, as a smart concrete additive, by direct incorporation in the concrete structure was investigated comprehensively including thermal, rheological, and corrosion behaviour. The thermal characterization of PCM was achieved using DSC, TGA, thermal conductivity, and thermal buffering experiments. Thermal storage capacity of BS was measured to be 134.2 J/g, which is high enough to be used for passive solar energy storage in buildings. The fresh concrete experiments revealed that workability and flowability of fresh concrete mixes were improved. The maximum hydration temperature was reduced, and a retarding effect was observed by the addition of BS. Moreover, the corrosion behaviour of steel embedded in concrete with BS as PCM was studied in a solution of NaCl (3.5 wt%) representing an aggressive environment by utilizing electrochemical impedance spectroscopy (EIS) for long‐term corrosion tests that lasted for 1 year. The open circuit potential of steel in concrete with BS showed noble potential indicating low corrosion probability. The FESEM images and polarization resistance (Rp) values showed that the addition of BS in concrete decreases corrosion of the rebar in comparison with concrete without BS. Addition of BS not only enhances thermal capacity but also exhibits corrosion protection of rebar by hindering penetration of chloride ions into the concrete.

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Isopropyl palmitate integrated with plasterboard for low temperature latent heat thermal energy storage

Alkhazaleh

2021

Int J Energy Res

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Summary In recent years, the latent heat thermal energy storage using phase change materials (PCMs) has become a hot topic; it has attracted much attention in the utilization of renewable energy sources to improve the energy efficiency of buildings. Isopropyl palmitate (ISOP) with phase transition temperature of 10°C to 13°C and heat of fusion of ~113 J/g was selected to be used as a PCM in building applications. ISOP, 15%, was mixed with plasterboard (PB) as a building material in two techniques, immersion and direct incorporation, in order to retain the ISOP into the porous structure of PB. Scanning electron microscope (SEM) demonstrated that the layer structure of the PB particles was uniformly absorbed by ISOP. Phase transition temperature of ISOP in both techniques determined using differential scanning calorimeter (DSC) is still similar to that of ISOP accompanied with much reduction in the latent heat, particularly in the direct incorporation technique. TCA 300 thermal conductivity analyzer addressed that the thermal conductivity of the PB has been slightly increased with the addition of ISOP. The stored thermal energy performance in a small test room is experimentally investigated. These results indicated that applying ISOP to the south wall of the testing room had the potential to reduce the fluctuation of the indoor air temperature. The effect of ISOP on the mechanical properties of PB has been investigated in the flexural mode using three‐point bending test. Moreover, the fire risk of ISOP has been assessed using cone calorimetric. The results confirmed that the novel composite ISOP has a significant opportunity in building applications for thermal energy storage.

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Direct Incorporation of Butyl Stearate as Phase Change Material into Concrete for Energy Saving in Buildings

Cited by 37 publications

References 12 publications

Improving Thermal and Mechanical Property of Lightweight Concrete Using N-Butyl Stearate/Expanded Clay Aggregate with Alccofine1203

Improving Thermal and Mechanical Property of Lightweight Concrete Using N-Butyl Stearate/Expanded Clay Aggregate with Alccofine1203

Comprehensive investigation of butyl stearate as a multifunctional smart concrete additive for energy‐efficient buildings

Isopropyl palmitate integrated with plasterboard for low temperature latent heat thermal energy storage

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