Experimental study on hybrid natural circulation type solar air heater with paraffin wax based thermal storage

The performance of a double pass solar air heater was experimentally investigated using four different configurations. First configuration contained only absorber plate whereas copper tubes filled with thermal storage medium (paraffin wax) were added on the absorber plate in the second configuration. Aluminum and steel rods as thermal enhancer were inserted in the middle of paraffin wax of each tube for configurations three and four respectively. Second configuration provided useful heat for about 1.5 hours after the sunset compared to first configuration. Configurations three and four provided useful heat for about 2 hours after the sunset. The maximum efficiency of about 96% was achieved using configuration three (i.e. using Aluminum rods in the middle of copper tubes filled with paraffin wax).

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Experimental Study on Double-Pass Solar Air Heater with and without using Phase Change Material

Journal of Engineering ◽

10.31026/j.eng.2019.02.01 ◽

2019 ◽

Vol 25 (2) ◽

pp. 1-17 ◽

Cited By ~ 2

Author(s):

Abdulrahman Shakir Mahmood

Keyword(s):

Experimental Study ◽

Phase Change ◽

Phase Change Material ◽

Air Temperature ◽

Thermal Performance ◽

Thermal Storage ◽

Solar Air Heater ◽

Double Pass ◽

Air Heater ◽

Change Material

In this paper, an experimental study was conducted to enhance the thermal performance of a double-pass solar air heater (SAH) using phase change material (PCM) for thermal storage at climatic conditions of Baghdad city - Iraq. The double-pass solar air heater integrated with thermal storage system was manufactured and tested to ensure that the air heating reserved after the absence of the sun. The rectangular cavity filled with paraffin wax was used as a latent heat storage and incorporated into the lower channel of solar air heater. Experiments were carried out to evaluate the charging and discharging characteristics of two similar designed solar air collectors with and without using phase change material at a constant air mass flow rate of (0.0375 kg/sec). The parameters that affect the thermal performance of the SAH with and without the PCMs presented by solar radiation, the difference in air temperature, outlet air temperature, instantaneous thermal efficiency, and daily efficiency are evaluated. The experimental results show that when using the PCM, the temperature of the outlet air was enhanced and increased over the ambient temperature by (1.5 - 6.5 C) after sunset for 5 hours period. It was found that the instantaneous thermal efficiency of the heater using thermal storage exceeds 100% after sunset, this is due to a large amount of heat stored in the paraffin wax that has been released during the discharge process. Also, it was found that the daily efficiency of the double pass SAH integrated with and without thermal energy storage unit was (56, 47%) respectively.

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Enhancement of Integrated Solar Collector with Spherical Capsules PCM Affected by Additive Aluminum Powder

Journal of Thermodynamics ◽

10.1155/2016/1604782 ◽

2016 ◽

Vol 2016 ◽

pp. 1-7 ◽

Cited By ~ 2

Author(s):

Fatah O. Al Ghuol ◽

K. Sopian ◽

Shahrir Abdullah

Keyword(s):

Mass Flow Rate ◽

Mass Flow ◽

Flow Rate ◽

Solar Collector ◽

Thermal Storage ◽

Paraffin Wax ◽

Solar Air Heater ◽

Storage Efficiency ◽

Aluminum Composite ◽

Air Heater

This research aims to study, analyze, design, and construct a solar air heater combined with an appropriate phase-change material (PCM) unit. This solar air heater is analogous to a collector integrating a thermal storage unit and a solar thermal collector. In this study, such single-pass solar air heater in amalgamation with PCM was constructed, and several tests were conducted on this device. During the experiments for the solar collector with PCM (spherical capsules), the temperature varied between 30°C and 35°C, and the air mass flow rate ranged between 0.03 and 0.09 kg/s. Results confirmed the predicted experimental findings. With the use of paraffin wax-aluminum composite, the thermal storage efficiency of the constructed solar air heater reached a maximum value of 71% at 0.05 kg/s mass flow rate, its charging time decreased by almost 70%, and its cooling rate increased. The thermal storage efficiency of the compound composite was 76.8% at 0.07 kg/s mass flow rate. The results also indicated that the time of charging decreased by almost 60% with the use of paraffin wax-aluminum composite.

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Thermo-hydraulic and exergetic performance of a cost-effective solar air heater: CFD and experimental study

Renewable Energy ◽

10.1016/j.renene.2021.11.111 ◽

2022 ◽

Vol 184 ◽

pp. 627-641

Author(s):

Kottayat Nidhul ◽

Ajay Kumar Yadav ◽

S. Anish ◽

U.C. Arunachala

Keyword(s):

Experimental Study ◽

Cost Effective ◽

Solar Air Heater ◽

Air Heater

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Experimental study on triple pass solar air heater with thermal energy storage for drying mint leaves

International Journal of Energy Technology and Policy ◽

10.1504/ijetp.2018.088276 ◽

2018 ◽

Vol 14 (1) ◽

pp. 34 ◽

Cited By ~ 1

Author(s):

S. Kesavan ◽

T.V. Arjunan

Keyword(s):

Experimental Study ◽

Energy Storage ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Solar Air Heater ◽

Air Heater

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EXPERIMENTAL STUDY OF SOLAR AIR HEATER USING OF PHOTOVOLTAIC CELLS

International Journal of Engineering Technologies and Management Research ◽

10.29121/ijetmr.v4.i12.2017.139 ◽

2020 ◽

Vol 4 (12) ◽

pp. 103-106

Author(s):

Deeksha Vishwakarma ◽

Jyoti Kale

Keyword(s):

Experimental Study ◽

Forced Convection ◽

Flow Rate ◽

Storage System ◽

Flat Glass ◽

Photovoltaic Cells ◽

Solar Air Heater ◽

Outlet Temperature ◽

Air Flow Rate ◽

Air Heater

In this paper, we are studying about solar air heater. The solar air heater are consisting the several component such as flat glass, collector, D.C. fan, photovoltaic cells and electrical storage system. In this study we are achieving the various type of outlet temperature with the help of D.C. fan and various Mass air flow rate using of simple absorber trays forced convection.

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