scholarly journals Phase Change Material Coating on Autoclaved Aerated Lightweight Concrete for Cooling Load Reduction

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
Chantana PUNLEK ◽  
Somchai MANEEWAN ◽  
Atthakorn THONGTHA
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Lightweight Concrete ◽  
Load Reduction ◽  
Cooling Load ◽  
Change Material

Quantitative Assessment of Phase Change Material Utilization for Building Cooling Load Abatement in Composite Climatic Condition

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Rajat Saxena ◽  
Kumar Biplab ◽  
Dibakar Rakshit
Keyword(s):  
Mathematical Modeling ◽  
Phase Change ◽  
Data Sheet ◽  
New Delhi ◽  
Load Reduction ◽  
Cooling Load ◽  
Solidification Temperature ◽  
Technical Data ◽  
Advanced Technologies ◽  
Change Material

The global trend of energy consumption shows that buildings consume around 48% of the total energy, of which, over 50% is for heating and cooling applications. This study elucidates on cooling load reduction with phase change material (PCM) incorporation in a building envelope. PCM provides thermal shielding due to isothermal heat storage during phase change. PCM selection depends upon its phase change temperature, thermal capacity, and thermal conductivity, as they play a vital role in assessing their impact on energy conservation in buildings. The uniqueness of this study underlies in the fact that it focuses on the utilization of PCM for New Delhi (28.54°N, 77.19°E) climatic conditions and adjudges the suitability of three commercially available PCMs, based on the overall heat load reduction and their characteristic charging/discharging. The study aims at finding an optimum melting and solidification temperature of the PCM such that it may be discharged during the night by releasing the heat gained during the day and mark its suitability. The results of mathematical modeling indicate that as per the design conditions, the melting/solidification temperature of 34 °C is suitable for New Delhi to absorb the peak intensity of solar irradiation during summer. Based on the thermophysical properties in literature (Pluss Advanced Technologies Pvt. Ltd., 2015, “Technical Data Sheet of savE® HS29, PLUSS-TDS-DOC-304 Version R0,” Pluss Advanced Technologies Pvt. Ltd., Gurgaon, India. Pluss Advanced Technologies Pvt. Ltd., 2015, “Technical Data Sheet of savE® OM32, PLUSS-TDS-DOC-394 Version R0,” Pluss Advanced Technologies Pvt. Ltd., Gurgaon, India. Pluss Advanced Technologies Pvt. Ltd., 2012, “Technical Data Sheet - savEVR HS34, Doc:305,” Pluss Advanced Technologies Pvt. Ltd., Gurgaon, India), mathematical modeling showed HS34 to be suitable for New Delhi among the three PCMs. To ratify this, characteristic charging and discharging of HS34 is tested experimentally, using differential scanning calorimeter (DSC). The results showed that HS34 is a heterogeneous mixture of hydrated salts having super-cooling of 6 °C, reducing its peak solidification temperature to 30.52 °C during the cooling cycle also making it unsuitable for peak summers in New Delhi.

The Effects of Thermal Mass and Phase Change Material on a Buildings’ Thermal Load

2009 ◽  
Author(s):  
Robert B. Gilbert
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Thermal Load ◽  
Thermal Mass ◽  
Load Reduction ◽  
Difference Model ◽  
Maximum Reduction ◽  
Material Equations ◽  
Change Material ◽  
Sinusoidal Function

A finite-difference model is used to simulate the effects of thermal mass and phase change material on thermal transmission through a building’s envelope wall. The exterior temperature is simulated by a sinusoidal function. The inside temperature is held constant. A comparison is given between the effects of thermal mass and phase change material. The maximum reduction in thermal load and required conditions is given for both thermal mass and phase change material. Equations are given for the maximum thermal load reduction as a function of the inside and outside temperature. Equations are also given which treat the thermal mass as a lumped capacitance and the expected error as a function of the amount of thermal mass. The conditions under which the addition of thermal mass and/or phase change material will result in a reduction of thermal load is given.

Optimizing mix proportion and properties of lightweight concrete incorporated phase change material paraffin/recycled concrete block composite

2016 ◽  
Vol 127 ◽  
pp. 475-483 ◽  
Author(s):  
Pattaraporn Suttaphakdee ◽  
Nattakan Dulsang ◽  
Narubeth Lorwanishpaisarn ◽  
Pornnapa Kasemsiri ◽  
Patcharapol Posi ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Lightweight Concrete ◽  
Concrete Block ◽  
Recycled Concrete ◽  
Mix Proportion ◽  
Change Material

Effectiveness of the phase change material-based thermal energy storage integrated with the conventional cooling systems of the buildings – A review

2018 ◽  
Vol 232 (6) ◽  
pp. 735-766 ◽  
Author(s):  
Adeel Waqas ◽  
Jie Ji ◽  
Majid Ali ◽  
Jahan Zeb Alvi
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Cooling System ◽  
Peak Time ◽  
Cooling Load ◽  
Cooling Systems ◽  
Active Cooling ◽  
Conventional Cooling ◽  
Change Material

A significant portion of energy is consumed by the buildings to provide thermal comfort for its occupants. Energy consumed by the conventional cooling machines is expected to increase substantially around the globe. Cooling systems coupled with phase change materials offer a high potential to minimize the cooling energy demand and shifting peak time cooling load to off-peak time period without compromising the indoor comfort conditions. The interest in phase change material utilization for cooling applications has been increasing significantly over the last decade because of their energy saving benefits in building sector. Therefore, in this work, effectiveness of the phase change material storage coupled with free cooling, evaporative cooling, and compressor-based cooling techniques in reducing the energy consumption or shifting the peak cooling load have been discussed and analyzed in detail. Different types of phase change materials used for active cooling systems along with their selection criteria for a particular application have been elaborated and discussed. Techniques to estimate the thermophysical properties of phase change material have also been explained. Phase change material capsulation techniques along with their merits and demerits are also described. Challenges and issues that may arise during integrating of phase change material storage with the active cooling system have also been explained. Finally, this review also presents some current problems that needed further research in this area. Current review will be a useful guide for the research community working or intending to work in the field of phase change material-based cooling system.

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