Preparation technology of phase change perlite and performance research of phase change and temperature control mortar

2014 ◽  
Vol 85 ◽  
pp. 506-514 ◽  
Author(s):  
Yan He ◽  
Xiong Zhang ◽  
Yongjuan Zhang
Keyword(s):  
Phase Change ◽  
Temperature Control ◽  
Preparation Technology ◽  
And Performance ◽  
Performance Research

scholarly journals Preparation and Performance Research of Gypsum Based Phase Change Materials

2014 ◽  
Vol 26 (5) ◽  
pp. 1513-1516
Author(s):  
Daosheng Sun ◽  
Wenbin Ge ◽  
Aiguo Wang ◽  
Peng Sun ◽  
Lin Guo
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
And Performance ◽  
Performance Research

Preparation and Performance of Gypsum Matrix Phase Change Energy-Storage Material

2012 ◽  
Vol 476-478 ◽  
pp. 1829-1832
Author(s):  
Qi Jin Li ◽  
Guo Zhong Li
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Water Absorption ◽  
Temperature Control ◽  
Matrix Phase ◽  
Expanded Perlite ◽  
Storage Material ◽  
Control Effect ◽  
Energy Storage Material ◽  
And Performance

Paraffin/expanded perlite composite phase change energy-storage material (PPCM) was prepared with expanded perlite as adsorption material and paraffin as phase change energy-storage material (PCM). The DSC and SEM results showed that the internal micropores of expanded perlite were filled with paraffin; the phase change temperature of PPCM was basically similar with that of paraffin and the latent heat of PPCM was corresponded with that of paraffin based on mass ratio among PPCM. PPCM was incorporated into gypsum to prepare gypsum matrix phase change energy-storage material (GPCM), and its mechanical properties, water absorption and temperature control effect were determined. The results showed that with the increase of PPCM’s content, the 2h compressive strength, flexure Strength and water absorption of GPCM continuously declined and its temperature control effect significantly enhanced.

Human Morphometrics, Motion, and Performance Research.

1994 ◽  
Author(s):  
Bruce Bradtmiller ◽  
Sherri Upchurch-Blackwell ◽  
Henry W. Case ◽  
Thomas D. Churchhill ◽  
Daniel N. Mountjoy
Keyword(s):  
And Performance ◽  
Performance Research

scholarly journals Energy Saving and Charging Discharging Characteristics of Multiple PCMs Subjected to Internal Air Flow

Fluids ◽  
2021 ◽  
Vol 6 (8) ◽  
pp. 275
Author(s):  
Ahmed J. Hamad
Keyword(s):  
Phase Change ◽  
Energy Saving ◽  
Air Temperature ◽  
Temperature Control ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Heating System ◽  
Air Heating ◽  
Room Model ◽  
Model Temperature

One essential utilization of phase change materials as energy storage materials is energy saving and temperature control in air conditioning and indirect solar air drying systems. This study presents an experimental investigation evaluating the characteristics and energy savings of multiple phase change materials subjected to internal flow in an air heating system during charging and discharging cycles. The experimental tests were conducted using a test rig consisting of two main parts, an air supply duct and a room model equipped with phase change materials (PCMs) placed in rectangular aluminum panels. Analysis of the results was based on three test cases: PCM1 (Paraffin wax) placed in the air duct was used alone in the first case; PCM2 (RT–42) placed in the room model was used alone in the second case; and in the third case, the two PCMs (PCM1 and PCM2) were used at the same time. The results revealed a significant improvement in the energy savings and room model temperature control for the air heating system incorporated with multiple PCMs compared with that of a single PCM. Complete melting during the charging cycle occurred at temperatures in the range of 57–60 °C for PCM1 and 38–43 °C for PCM2, respectively, thereby validating the reported PCMs’ melting–solidification results. Multiple PCMs maintained the room air temperature at the desired range of 35–45.2 °C in the air heating applications by minimizing the air temperature fluctuations. The augmentation in discharging time and improvement in the room model temperature using multiple PCMs were about 28.4% higher than those without the use of PCMs. The total energy saving using two PCMs was higher by about 29.5% and 46.7% compared with the use of PCM1 and PCM2, respectively. It can be concluded that multiple PCMs have revealed higher energy savings and thermal stability for the air heating system considered in the current study.

scholarly journals Design and Performance Study for Electrothermally Deep-Sea Drive Microunits Using a Paraffin Phase Change Material

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 415
Author(s):  
Dayong Ning ◽  
Zihao Li ◽  
Gangda Liang ◽  
Qibo Wang ◽  
Weifeng Zou ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Deep Sea ◽  
Hydraulic System ◽  
Functional Verification ◽  
Performance Study ◽  
Micro Electro Mechanical Systems ◽  
Pressure Compensation ◽  
And Performance ◽  
Change Material

Considering the further exploration of the ocean, the requirements for deep-sea operation equipment have increased. Many problems existing in the widely used deep-sea hydraulic system have become increasingly prominent. Compared with the traditional deep-sea hydraulic system, actuators using a paraffin phase change material (PCM) have incomparable advantages, including lightweight structure, low energy consumption, high adaptability to the deep sea, and good biocompatibility. Thus, a deep-sea drive microunit (DDM) based on paraffin PCM is proposed in this paper. The device adopts a flexible shell, adapting to the high-pressure environment of the deep-sea based on the principle of pressure compensation. The device realizes the output of displacement and force through the electrothermal drive, which can be used as actuator or power source of other underwater operation equipment. The microunit successfully completes the functional verification experiments in air, shallow water, and hydrostatic pressure of 110 MPa. In accordance with experimental results, a reasonable control curve is fitted, highlighting its potential application in deep-sea micro electro mechanical systems, especially in underwater soft robot.

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