scholarly journals PHASE CHANGE MATERIALS USED IN BUILDING ENVELOPES

2019 ◽  
Vol 86 (6) ◽  
pp. 66-85
Author(s):  
R.A. NAZIROV ◽  
◽  
A.V. TAKHTOBIN ◽  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Building Envelopes ◽  
Materials Used

The Effect of Phase Change Materials on the Physical, Thermal and Mechanical Properties of Cement

Sci ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 27 ◽  
Author(s):  
Zakaria Dakhli ◽  
Khaled Chaffar ◽  
Zoubeir Lafhaj
Keyword(s):  
Phase Change ◽  
Development Strategy ◽  
Phase Change Materials ◽  
Materials Science ◽  
Current Trend ◽  
Building Construction ◽  
Concrete Mixtures ◽  
Materials Used ◽  
Save Energy ◽  
Change Material

When focusing on materials science in civil engineering, the current trend is to investigate the use of innovative solutions in order to enhance thermal and energy performances. This trend is amplified with the need for a sustainable development strategy for the construction sector. This paper assesses the integration of a Phase Change Material (PCM) in cement intended for building construction. The key characteristic of PCMs is their capacity to absorb energy and restore it. In building construction, this feature could be harnessed to save energy by incorporating PCMs in the materials used. In this study, passive integration of PCM in cement was tested and thermal properties of such an integration was assessed. The results provide insights into how PCMs affect cement as part of the concrete mixture, thus identifying the contribution of PCM-based cements in concrete mixtures.

Design of an Initialization Circuit Used in Phase Change Memory Chip

2014 ◽  
Vol 543-547 ◽  
pp. 471-474
Author(s):  
Qian Wang ◽  
Hou Peng Chen ◽  
Yi Yun Zhang ◽  
Xi Fan ◽  
Xi Li ◽  
...  
Keyword(s):  
Phase Change ◽  
High Resistance ◽  
Phase Change Materials ◽  
Phase Change Memory ◽  
Memory Cells ◽  
Memory Chip ◽  
Grain Sizes ◽  
Reset Operation ◽  
Materials Used ◽  
Change Memory

Design of a novel initialization circuit is presented in this paper. The initialization circuit is used to supply initialization current to the first test of phase change memory chip after delivery. Inhomogeneous crystalline grain sizes appear in phase change materials used in memory cells during manufacturing process. The crystalline phase with low resistance will convert to amorphous phase with high resistance after initialization, which is called RESET the memory cells to 0. Normal RESET operation current is not high enough to RESET great grain, which deteriorates bit yield of phase change memory chip. In comparison, the higher initialization current will increase bit yield observably.

An Economic Analysis and Calculation for Selecting of the Phase-Change Heat Storage Materials Used in the Roof with a Solar Energy Storage Ventilation Systems

2012 ◽  
Vol 479-481 ◽  
pp. 578-585
Author(s):  
Juan Zhao ◽  
Jun Lu ◽  
Peng Chen ◽  
Ya Qin Zhang ◽  
Liao Liao
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Economic Analysis ◽  
Phase Change ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Solar Energy Storage ◽  
Heat Storage Materials ◽  
Materials Used ◽  
Set Up

the experiments set up a roof model with a solar energy heat storage ventilation. According to the actual demands of experiments, through an economic analysis it results the preliminary investment of the solar energy storage ventilationthe system is between 307~367Yuan/m2 by calculating a energy balance in some way and choosing some type of heat storage phase change materials with a suitable quantity to fit for the model.

Thermal Performance Optimization of Shape Stabilized Phase Change Material Used in Building Envelopes

2017 ◽  
Vol 744 ◽  
pp. 201-206
Author(s):  
Yin Zhang ◽  
Ming Shan Zhang
Keyword(s):  
Thermal Comfort ◽  
Phase Change ◽  
Performance Optimization ◽  
Optimization Design ◽  
Phase Change Materials ◽  
Transfer Model ◽  
Building Envelopes ◽  
Practical Applications ◽  
Indoor Thermal Comfort ◽  
Heating Loads

Integrating phase change materials (PCM) with building envelopes is an effective way to reduce the cooling or heating loads, improve indoor thermal comfort and save building energy consumptions. In this paper, the heat transfer model of building envelopes with shape stabilized PCM is established and the optimal phase change temperature and enthalpy of PCM for internal walls are determined. Moreover, different PCM locations in external walls are compared based on the evaluation index of integrated uncomfortable degree. The results shows that to improve indoor thermal comfort, it is preferable to put the PCM in the middle of external wall. It also indicates that the overall integrated uncomfortable degree in a whole year decreases with increasing thickness of the inserted shape stabilized PCM plate. This work is of great significance in guiding the optimization design of building envelopes with PCM for practical applications.

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