Radiation energy conversion and cooling of concrete box beam based on liquid-gas phase change material

2021 ◽  
Author(s):  
Min Wu ◽  
Xinlin Li
Keyword(s):  
Phase Change ◽  
Energy Conversion ◽  
Gas Phase ◽  
Phase Change Material ◽  
Radiation Energy ◽  
Box Beam ◽  
Change Material

scholarly journals Pengaruh Penambahan Phase Change Material (PCM) Pada Pemanas Air Kolektor Tabung Dilengkapi Dengan Reflektor Double - U

2019 ◽  
Vol 12 (2) ◽  
pp. 58
Author(s):  
Veni Dwi Sulastri ◽  
Hary Sutjahjono ◽  
Ahmad Syuhri
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Mass Flow ◽  
Radiation Energy ◽  
Heat Energy ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Flat Plate Collector ◽  
Change Material

Pemanas air energi surya merupakan suatu sistem pemanas air dengan cara kerja menyerap energi radiasi matahari yang kemudian diubah menjadi energi panas dan ditransfer menuju fluida kerja melalui pipa air. Pemanas air ini dibagi menjadi dua yaitu pemanas air kolektor tabung dan pemanas air kolektor plat datar. Dilakukan penelitian dengan menambahkan bahan Phase Change Material (PCM) yaitu sebuah material yang dapat menyimpan energi panas pada pemanas air kolektor tabung dilengkapi dengan reflektor double-U. Variabel pada penelitian ini yaitu pemanas air kolektor tabung tanpa menggunakan PCM dan menggunakan PCM, serta variasi laju aliran massa 0,008 kg/s, 0,010 kg/s, dan 0,030 kg/s. Bahan PCM yang digunakan yaitu campuran parafin 70% dan minyak goreng 30%. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh penambahan PCM terhadap temperatur air dan efisiensi dari pemanas air kolektor tabung. Hasil dari penelitian menunjukkan bahwa efisiensi tertinggi terjadi pada pemanas air kolektor tabung menggunakan PCM dengan laju aliran massa 0,030 kg/s yaitu sebesar 53,11%.   Solar water heater is a system that can absorb solar radiation energy and converted it into heat energy and transferred to the fluid of water pipe. Solar water heaters are divided into two types, that are tube collector water heater and flat plate collector water heater. The study was conducted by adding Phase Change Material (PCM), a material that can store heat energy in the tube collector water heater equipped with a double-U reflector. The variables in this study were tube collector water heaters without using PCM and tube collector water heaters using PCM, as well as variations in mass flow rates of 0.008 kg / s, 0.010 kg / s, and 0.030 kg / s. The PCM material used is 70% of paraffin and 30% of cooking oil. The purpose of this study is to determine the effect of adding PCM to water temperature and efficiency of tube collector water heaters. The results of the study showed that the highest efficiency occurred in tube collector water heaters using PCM with a mass flow rate of 0.030 kg / s which was equal to 53.11%.

Fe3O4-functionalized graphene nanosheet embedded phase change material composites: efficient magnetic- and sunlight-driven energy conversion and storage

2017 ◽  
Vol 5 (3) ◽  
pp. 958-968 ◽  
Author(s):  
Wentao Wang ◽  
Bingtao Tang ◽  
Benzhi Ju ◽  
Zhanming Gao ◽  
Jinghai Xiu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Change ◽  
Energy Conversion ◽  
Phase Change Material ◽  
Alternating Magnetic Field ◽  
Functionalized Graphene ◽  
Graphene Nanosheet ◽  
Energy Conversion And Storage ◽  
And Storage ◽  
Change Material

Magnetic- and sunlight-driven energy conversion and storage can be realized by using Fe3O4–GNS/PCM under an alternating magnetic field or solar illumination.

scholarly journals Crystallization of Ge2Sb2Te5 nanometric phase change material clusters made by gas-phase condensation

2012 ◽  
Vol 101 (23) ◽  
pp. 233113 ◽  
Author(s):  
G. E. Ghezzi ◽  
R. Morel ◽  
A. Brenac ◽  
N. Boudet ◽  
M. Audier ◽  
...  
Keyword(s):  
Phase Change ◽  
Gas Phase ◽  
Phase Change Material ◽  
Change Material

scholarly journals The Influence of Glazing on the Functioning of a Trombe Wall Containing a Phase Change Material

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5243
Author(s):  
Lech Lichołai ◽  
Aleksander Starakiewicz ◽  
Joanna Krasoń ◽  
Przemysław Miąsik
Keyword(s):  
Solar Radiation ◽  
Phase Change ◽  
Phase Change Material ◽  
Experimental Studies ◽  
Experimental Tests ◽  
Radiation Energy ◽  
Small Scale ◽  
Trombe Wall ◽  
High Dynamics ◽  
Change Material

Among the technological solutions for external walls, the Trombe wall is an interesting proposition for obtaining solar radiation energy. The aim of the presented research is to determine the influence of glazing parameters on the thermal performance of the Trombe wall containing a phase change material (PCM). In the experimental tests, three glazing (G1, G2, and G3) with different heat transfer coefficient (Ug) and total solar energy transmittance factor (g) were used. The tests were carried out under laboratory conditions in a small-scale simulation chamber. The thermal energy of absorbed solar radiation was simulated with a heating panel. All of the walls are characterized by high dynamics of operation in the first two days. From the moment of heating, the walls achieve the minimum value of the heat flux after 16–18 h. In practice, this means the highest thermal efficiency of the wall during the night of the next day. A noticeable influence of the type of glazing on the operation of the barrier was found. The obtained results suggest that the most effective barrier for “sunny days” is the B1 barrier. The B2 barrier is suitable for alternating days in the cycle: “sunny day”, “cloudy day”. However, the B3 barrier is the most advantageous in periods with a predominance of “cloudy days”. In addition to the experimental studies, a numerical model of the B1 barrier was developed and simulation was carried out using the finite element method. The simulation results were consistent with the experimental tests. The second numerical simulation confirmed the rightness of using the heating panel in experimental tests.

Experimental Study on the Thermal Performance of the Shape-Stabilized Phase Change Material Floor Used in Passive Solar Buildings

2005 ◽  
Vol 128 (2) ◽  
pp. 255-257 ◽  
Author(s):  
Yinping Zhang ◽  
Xu Xu ◽  
Hongfa Di ◽  
Kunping Lin ◽  
Rui Yang
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Thermal Performance ◽  
Radiation Energy ◽  
Indoor Temperature ◽  
Simulation Research ◽  
Floor Systems ◽  
Apparent Specific Heat ◽  
Heating Energy Consumption ◽  
Change Material

The novel shape-stabilized phase change material (PCM) has the following salient features: large apparent specific heat for the phase change temperature region, suitable thermal conductivity, and the ability to keep the shape stabilized when it undergoes a phase change. In this technical brief, we put forward a kind of shape-stabilized PCM floor that is able to absorb solar radiation energy in the daytime and to release the heat at night in winter. The thermal performance of a prototype room using such a floor was studied. The experiments show that the mean indoor temperature of a room with the PCM floor is about 2°C higher than that of the room without a PCM floor, and the indoor temperature swing range is obviously minimized. Therefore, installing shape-stabilized PCM in a room may increase the degree of thermal comfort and reduce space heating energy consumption in winter. In addition, the experimental results provide data for modeling and simulation research for such PCM floor systems.

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