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2 2022

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An Investigation to Estimate the Maximum Yielding Capability of Power for Mini Venturi Wind Turbine

100%

Sunil Kumar K. , Muniamuthu S. , Tharanisrisakthi B. T.

tom Vol. 23, iss. 3

72--78

The present research work deals with the design and fabrication of windmill using venturi effect. The venturi effect is achieved such a way that the propeller rotation is increased about four times for the wind velocity in the surroundings. For any direction of wind flow, the propeller is rotated. The wind velocity required for power production in our research area is very less when compared with the existing systems. There are no effects on the birds and also there is reduction in noise level when compared with existing conventional wind mills. The wind enters the nozzle where its velocity is increased slightly. Hence the proposed idea is to overcome the difficulties in exisisting wind mills. From this experimental analysis it was understood that the maximum yield of power was increased by 12% nearly (800 to 1000 W) compared to conventional windmills, which can be used essentially for domestic applications. The design in terms of cost and life was to be increased by 6% as compared to VAWT and HAWT. By the utilization of venturi wind turbines; the possibilities of facing real time problems such as resonance and sound intensity was decresed by 10% as compared to conventional wind turbines.

Effect of Charging and Discharging Process of PCM with Paraffin and Al2O3 Additive Subjected to Three Point Temperature Locations

88%

Kumar S. K. , Muniamuthu S. , Mohan A. , Amirthalingam P. , Anbu Muthuraja M.

Journal of Ecological Engineering

2022

tom Vol. 23, nr 2

34--42

This analysis focused on investigating thermal storage behaviour on phase change material along with Al2O3 as an additive. The experimental investigation was performed by three set temperature points, i.e. 40 °C, 50 °C and 60 °C with the mass circulation rate through the tank of 5 kg/min, 3 kg/min and 2 kg/min. The forced circulation method was used to circulate the liquid, water was used as a working medium and Al2O3 as nano particle. Paraffin acts a phase change material to conduct the experimental procedure. The combination of paraffin with Al2O3 improves the latent heat storage of the material. The performance, with respect to charging and discharging of the material, was investigated and it was observed that the temperature location point of 50 °C shows the best results in terms of charging and discharging phenomena, compared to other two temperature location points. During the process of charging, the maximum rate of heat transfer can be achieved by Al2O3 nanofluids. Paraffin along with Al2O3 are characterized by the best thermal storage behaviour during the latent heat storage at charging process and dissipation of heat during discharge process. The rapid cooling comparison for three set location points has been studied and best solidification was achieved at the point of 60 °C; this is due to the rapid cooling at higher elevation temperatures. The energy that was stored in thermal form is to be transferred with the aid of heat exchanger, a special type heat exchanger employed in this analysis to transfer the heat. From this analysis it is concluded that paraffin with Al2O3 are characterized by the best performance in terms of the charging and discharging phenomenon.