Silica fume/capric acid-stearic acid PCM included-cementitious composite for thermal controlling of buildings: Thermal energy storage and mechanical properties

Gökhan Hekimoğlu, Memduh Nas, Mohammed Ouikhalfan, Ahmet Sarı, V.V. Tyagi, R.K. Sharma, Şirin Kurbetci and Tawfik A. Saleh

Energy, 2021, vol. 219, issue C

Abstract: In this paper, we produced new kind cement mortars with thermal energy storing/releasing properties, containing silica fume (SF)/capric acid-stearic acid eutectic mixture (CA-SA) as form-stable composite phase change material (FSC-PCM). The physicochemical compatibility between CA-SA eutectic PCM and SF was studied by fourier-transform infrared (FTIR), X-ray powder diffraction (XRD) and scanning electron microscope (SEM) techniques. The differential scanning calorimetry (DSC) results indicated that the FSC-PCM including 37 wt% CA-SA eutectic PCM has a phase change temperature and latent heat capacity of 23.28 °C and 65.6 J/g, respectively. Thermogravimetric (TG) measurements and thermal cycling examination demonstrated that FSC-PCM has great stability in terms of its chemical structure, thermal degradation and cycling reliability in LHTES properties. To achieve novel type cementations composite mortar, the FSC-PCM was replaced with ordinary cement mortar (OCM) in weight fraction of 10%, 15% and 20%. Thermoregulation performance test showed that the maximum indoor temperatures differences between the OCM and latent heat storage-cement mortar (LHS-CM) based rooms were found as 2.48 °C during the heating stage and 1.71 °C during the cooling stage. Mechanical test findings of the LHS-CMs showed acceptable mechanical properties and have suitable properties for regulation of indoor temperatures and reducing energy consumption in buildings.

Keywords: Capric acid; Stearic acid; Eutectic mixture; Silica fume; Cement; Composite PCM; Thermal energy storage; Thermoregulation; Building (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:219:y:2021:i:c:s0360544220326955

DOI: 10.1016/j.energy.2020.119588

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