دانلود رایگان مقاله تولید برق از طریق واحد تولید برق نوع ورقی از حوضچه خورشیدی

Abstract

Solar pond (SP) has been a reliable supply of heat source for heating process that requires temperature <100 °C. In this work, the capability of solar pond in generating electricity has been explored experimentally using a plate type power generation unit (PTPGU). The open channel PTPGU was designed and fabricated in order to accommodate the TECs. The heat stored in the lower convective zone (LCZ) is used as the heat source needed for generating electricity by utilising thermoelectric cells (TECs) and thus a combined SP-PTPGU system is proposed. The PTPGU was tested with different hot water temperatures and flow rates. Also, the possibility of performance enhancement utilising copper mesh as insertion is presented. From the testing conducted, the PTPGU is able to generate 35.9 W of electricity at the flow rate as low as 5.1 LPM (litre per minute) at the hot water temperature of 81 °C. Besides coupling with solar pond, the PTPGU designed can also be coupled with other type of hot water source, such as hot spring.

5. Conclusion

This paper has presented a proof of concept on the electric power generation by TECs with solar ponds experimentally, operated under different conditions. The PTPGU proposed is subjected to an open channel flow. The study started by addressing the design issues of PTPGU, followed by the theoretical modelling on heat transfer of PTPGU before estimating the electric output using the performance curve of single TEC. The PTPGU fabricated was then tested after ensuring a good flow distribution via visualisation. From the testing conducted, electrical power output of 35.9 W was generated under the condition of V_ c ¼ 18:5 LPM and V_ h ¼ 5:1 LPM at the temperature of Tc;in ¼ 25
C and Th;in ¼ 81
C. It has been shown that the theoretical model proposed is adequate to predict the performance of the PTPGU after comparing the performance of the PTPGU obtained experimentally with the theatrical prediction. Furthermore, it has been shown in this work that, small degree in performance enhancement of the PTPGU is possible through copper mesh insertion.