Estimation of the specific enthalpy–temperature functions for plastering mortars containing hybrid mixes of phase change materials

The use of phase change materials (PCMs) for the building sector is increasingly attracting attention from researchers and practitioners. Several research studies forwarded the possibility of incorporating microencapsulated PCM in plastering mortars for building façades, in pursuit of increased energy efficiency associated with the heat storage capacity of PCM. However, most of these studies are centred in the use of a single type of PCM, which is bound to be more adequate for a given season of the year (e.g. winter or summer) than for all the seasons. The study proposed in this work regards the evaluation of the possibility of using more than one kind of PCM, with distinct melting ranges, here termed as hybrid PCMs, in plastering mortars, to achieve adequately advantageous performance in all seasons of the year. To characterize the PCM, the specific enthalpy and phase change temperature should be adequately measured. The main purpose of this study was to show the conceptual feasibility of combining PCMs in mortars and to evaluate the behaviour of the resulting mortars with differential scanning calorimeter. The results showed that the behaviour of the mortar that contains more than one type of PCM can be predicted through the superposition of effects of the independent PCMs and no interaction occurs between them. The knowledge obtained from the experimental testing established bases for a framework of numerical simulation of real-scale applications, which can be used to ascertain the feasibility of the hybrid PCM concept for decreases in energy consumption of heating/cooling demands in the buildings.

[1]  M. Hawlader,et al.  Microencapsulated PCM thermal-energy storage system , 2003 .

[2]  L. Cabeza,et al.  Study on differential scanning calorimetry analysis with two operation modes and organic and inorganic phase change material (PCM) , 2013 .

[3]  Joseph Virgone,et al.  Energetic efficiency of room wall containing PCM wallboard: A full-scale experimental investigation , 2008 .

[4]  Sevastianos Mirasgedis,et al.  European residential buildings and empirical assessment of the Hellenic building stock, energy consumption, emissions and potential energy savings , 2007 .

[5]  Zhu Neng,et al.  Experimental study and evaluation of latent heat storage in phase change materials wallboards , 2007 .

[6]  Miguel Azenha,et al.  THERMAL ENHANCEMENT OF PLASTERING MORTARS WITH PHASE CHANGE MATERIALS: EXPERIMENTAL AND NUMERICAL APPROACH , 2012 .

[7]  Arild Gustavsen,et al.  Phase Change Materials for Building Applications: A State-of-the-Art Review , 2010 .

[8]  DETERMINATION OF THE HEAT STORAGE CAPACITY OF PCM AND PCM-OBJECTS AS A FUNCTION OF TEMPERATURE , 2006 .

[9]  Savvas A. Tassou,et al.  Effectiveness of CFD simulation for the performance prediction of phase change building boards in the thermal environment control of indoor spaces , 2013 .

[10]  F. Kuznik,et al.  Experimental assessment of a phase change material for wall building use , 2009 .

[11]  Dong Zhang,et al.  Experimental study on the phase change behavior of phase change material confined in pores , 2007 .

[12]  S. C. Kaushik,et al.  DEVELOPMENT OF PHASE CHANGE MATERIALS BASED MICROENCAPSULATED TECHNOLOGY FOR BUILDINGS: A REVIEW , 2011 .

[13]  A. Sari,et al.  Thermal properties and thermal reliability of eutectic mixtures of some fatty acids as latent heat storage materials , 2004 .

[14]  Harald Mehling,et al.  Enthalpy of Phase Change Materials as a Function of Temperature: Required Accuracy and Suitable Measurement Methods , 2009 .

[15]  Qunli Zhang,et al.  Performance of a hybrid heating system with thermal storage using shape-stabilized phase-change material plates , 2007 .

[16]  Luisa F. Cabeza,et al.  Materials used as PCM in thermal energy storage in buildings: A review , 2011 .

[17]  L. Cabeza,et al.  Heat and cold storage with PCM: An up to date introduction into basics and applications , 2008 .

[18]  André Bontemps,et al.  Thermal testing and numerical simulation of a prototype cell using light wallboards coupling vacuum isolation panels and phase change material , 2006 .

[19]  Luisa F. Cabeza,et al.  Determination of the enthalpy of PCM as a function of temperature using a heat‐flux DSC—A study of different measurement procedures and their accuracy , 2008 .

[20]  Luisa F. Cabeza,et al.  Experimental study of using PCM in brick constructive solutions for passive cooling , 2010 .

[21]  Changying Zhao,et al.  Review on microencapsulated phase change materials (MEPCMs): Fabrication, characterization and applications , 2011 .