Investigation of solar air heater with phase change materials using packed bed absorber plate

2020 ◽  
Author(s):  
R. Karthikeyan ◽  
R. Arul Kumar ◽  
P. Manikandan ◽  
A.K. Senthilnathan
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Packed Bed ◽  
Solar Air Heater ◽  
Absorber Plate ◽  
Air Heater

scholarly journals Experimental analysis of solar air heater using polygonal ribs in absorber plate integrated with phase change material

2021 ◽  
pp. 345-345
Author(s):  
Kumar Varun ◽  
G. Manikandan ◽  
Kanna Rajesh ◽  
Venkata Poluru
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Heat Transfer Enhancement ◽  
Phase Change Material ◽  
Mass Flow ◽  
Solar Air Heater ◽  
Transfer Enhancement ◽  
Absorber Plate ◽  
Air Heater ◽  
Change Material

Heat transfer enhancement in Solar Air Heater (SAH) has been investigated by implementing rough surfaces in the absorber plate. We use paraffin wax is used as Phase Change Material (PCM) integrated with SAH as a Thermal Energy Storage (TES) system. A maximum convective heat transfer is attained during the daytime and retained as latent heat (LH) to discharge heat during OFF radiation. In this investigation, two types of absorber plates were employed such as flat & polygonal-shaped ribs at the test section. Further to investigate the heat transfer enhancement, the research was conducted with and without PCM. The study was carried out at the mass flow rates of 0.062 kg/s, 0.028 kg/s, and 0.01 kg/s to ascertain the enhancement of thermal efficiency and heat discharge duration. The temperatures of absorber plate Tp, ambient Tamb, outlet Tout and PCM along with Solar Intensity I (W/m-2) were taken as the main parameters. The research reveals that the absorber plate with polygonal ribs tested with PCM yields a higher temperature of 77?C with a mass flow rate of 0.062 kg/s during peak radiation. And discharged heat energy from PCM to absorber plate for 3.5 hours with a maximum temperature of 7.1?C.

scholarly journals Flat solar air heater collector with phase change materials for domestic purposes in Iraqi climate

2020 ◽  
Vol 928 ◽  
pp. 022099
Author(s):  
Bashar K Mahmoud ◽  
Sulafa I Ibrahim ◽  
Khaleel I Abass ◽  
Ali J Ali ◽  
Miqdam T Chaichan
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Solar Air Heater ◽  
Air Heater

Experimental investigations of a solar dryer with and without multiple phase change materials (PCM’s)

2016 ◽  
Vol 13 (3) ◽  
pp. 210-217 ◽  
Author(s):  
T.S. Sreerag ◽  
K.S. Jithish
Keyword(s):  
Energy Storage ◽  
Melting Point ◽  
Phase Change ◽  
Phase Change Materials ◽  
Drying Process ◽  
Absorber Plate ◽  
Content Type ◽  
Air Heater ◽  
Multiple Phase ◽  
Solar Dryer

Purpose This paper aims to present a comparative study of a solar dryer with and without multiple phase change materials (PCMs). It also involves designing and fabricating the experimental model of an indirect solar dryer which uses PCMs for thermal energy storage. Design/methodology/approach A corrugated aluminium sheet is used as an absorber plate. Aluminium pipes of 0.75 inch are welded under the corrugated sheet to store the PCM. Here, multiple PCMs are used – one with a high melting point and the other with a low melting point for the purpose of improving efficiency. A single air pass model in which air moves over the absorber plate is used for the study. Air is heated in an air heater section which also contains thermal energy storage. The energy obtained in the air heater section is first used to heat and melt the PCM. Findings Thus, heat energy is stored into the PCM and then the heated air moves into the drying chamber in which drying take place. When the sun’s insolation reduces, discharging from the PCM takes place. Thus, it reduces the fluctuation in the energy and provides continuous energy to the system. Glass wool is used as an insulation material. Different parameters for this air heater-dryer have been calculated. Originality/value The current study enhances the understanding of solar drying process and the developed model with and without multiple phase change materials can be used for optimising the drying process.

scholarly journals Eco-Friendly and Economical Solar Heater Design Using Internal Structure and Phase Change Materials

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7423
Author(s):  
Jihu Lee ◽  
Sung-Hun Son ◽  
Kibum Kim
Keyword(s):  
Phase Change ◽  
Internal Structure ◽  
Air Temperature ◽  
Phase Change Materials ◽  
Operating Conditions ◽  
Internal Space ◽  
Solar Air Heater ◽  
Air Heater ◽  
Solar Heater ◽  
Heater Design

Indoor heating systems currently used are highly dependent on fossil fuels; hence, it is urgent to develop a new heating system to achieve carbon zero-emission. A solar air heater is eco-friendly because it generates nearly zero greenhouse gases. In this study, a parametric study was conducted for optimizing solar air heater design applicable to indoor heating. Installing the internal structure in the solar heater changes the interior flow characteristic, resulting in the air temperature increased by about 14.2 K on average compared to the heater without the internal structure. An additional case study was carried out to optimize the ideal quantity of phase change materials (PCM) in terms of mass fraction and heat capacity for various operating conditions. An excessive amount of PCM (e.g., 66% of the storage space filled with PCM) deteriorates the performance of the air heater unless the entire PCM could be melted during the daytime. After heating, the air temperature was maintained the longest when only 33% of the internal space was filled with PCM. The solar air heater can fully replace or partly assist a conventional heater for indoor heating, and it could reduce approximately 0.6 tCO2 per year.

Thermal Performance Analysis of a Rectangular Longitudinal Finned Solar Air Heater With Semicircular Absorber Plate

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Satyender Singh ◽  
Prashant Dhiman
Keyword(s):  
Thermal Performance ◽  
Numerical Solutions ◽  
Solar Air Heater ◽  
Duct Flow ◽  
Balance Equations ◽  
Absorber Plate ◽  
Ansys Fluent ◽  
Air Heater ◽  
Glass Cover ◽  
Good Agreement

Thermal performance of a single-pass single-glass cover solar air heater consisting of semicircular absorber plate finned with rectangular longitudinal fins is investigated. The analysis is carried out for different hydraulic diameters, which were obtained by varying the diameter of the duct from 0.3–0.5 m. One to five numbers of fins are considered. Reynolds number ranges from 1600–4300. Analytical solutions for energy balance equations of different elements and duct flow of the solar air heater are presented; results are compared with finite-volume methodology based numerical solutions obtained from ansys fluent commercial software, and a fairly good agreement is achieved. Moreover, analysis is extended to check the effect of double-glass cover and the recycle of the exiting air. Results revealed that the use of double-glass cover and recycle operation improves the thermal performance of solar air heater.

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