Browsing by Author "Youshanlouei, Mohammad Mehdizadeh"

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Citation Count: Ayed, Hamdi;...et.al. (2022). "Experimental investigation on the thermo-hydraulic performance of air–water two-phase flow inside a horizontal circumferentially corrugated tube", Alexandria Engineering Journal, Vol.61, No.9, pp.6769-6783.
Experimental investigation on the thermo-hydraulic performance of air–water two-phase flow inside a horizontal circumferentially corrugated tube
(2022) Ayed, Hamdi; Arsalanloo, Akbar; Khorasani, Saleh; Youshanlouei, Mohammad Mehdizadeh; Jafarmadar, Samad; Abbasalizadeh, Majid; Jarad, Fahd; Mahariq, Ibrahim; 234808
In this study, flow visualization, pressure drop and thermal characteristics of the corrugated tube with non-boiling air–water two-phase flow were experimentally studied. Glass tubes were used to visualize the flow patterns of two-phase flow. Furthermore, the thermal behavior of two phase flow was studied in the copper made tubes which was under constant heat flux. The total of 740 W thermal energy was applied on tubes. Superficial velocity of liquid was within the range of 0.42 m/s to 1.69 m/s. Also, the superficial velocity of air was within the range of 0.21 m/s to 1.06 m/s. The results revealed that the corrugations significantly affect the flow patterns which results in earlier transition. The flow patterns of bubbly, churn, wavy slug, wavy plug, wavy stratified and mist flow were observed inside corrugated tube. Also, it was found that the maximum Nusselt number increment in corrugated tube was 3%. Besides, formation of the mist flow in corrugated tube reduced the Nusselt number. Also, the pressure drop was significantly affected by the air–water two-phase flow presenting around 165 % in the pressure drop compared to the single phase flow.
Citation Count: Luo, Jie;...et.al. (2022). "Profit and efficiency enhancement of a cylindrical solar collector by structural modification of helical tube", Case Studies in Thermal Engineering, Vol.34.
Profit and efficiency enhancement of a cylindrical solar collector by structural modification of helical tube
(2022) Luo, Jie; Mansir, Ibrahim B.; Sharma, Kamal; Mahariq, Ibrahim; Jarad, Fahd; Youshanlouei, Mohammad Mehdizadeh; Moria, Hazim; Aldawi, Fayez; Reda, Shaker A.; 234808
Cylindrical solar collectors (CSCs) are getting attraction. Heat extraction part of these instruments consists of a helical tube which transfers thermal energy to working fluid. Enhancement of the heat transfer process within this part leads to enhancement of energy achievement. In this paper, influence of applying helical corrugation on helical absorber was evaluated. The number of corrugations and pitch and height of corrugations were considered as variant parameters. The system was evaluated from different viewpoints and performance of system was analyzed based on performance factor and economic viewpoints. The results revealed that the presence of helical Corrugation could increase heat transfer up to 19%. It was found that Dean number of 3000 could be considered as a critical Dean number from view point of performance factor. The application of the proposed system was more beneficial at Dean numbers below 3000. It was revealed that the application of helical corrugation could provide up to 24% enhancement in economic advantage of the system. Best economic performance was related to case with four starts which had corrugation height and corrugation pitch of 0.002 m and 0.103 m and occurred at Dean number of 2000.
Citation Count: Ayed, Hamdi...et all. (2021). "Thermal, efficiency and power output evaluation of pyramid, hexagonal and conical forms as solar panel", Case Studies in Thermal Engineering, Vol. 27.
Thermal, efficiency and power output evaluation of pyramid, hexagonal and conical forms as solar panel
(2021) Ayed, Hamdi; Moria, Hazim; Aldawi, Fayez; Farouk, Naeim; Sharma, Kamal; Youshanlouei, Mohammad Mehdizadeh; Mahariq, Ibrahim; Jarad, Fahd; 234808
Through the present investigation, the thermal and power output of novel-shaped solar panels are evaluated. For the cooling of the mentioned forms, forced air flow was utilized. Three novel shapes, of Pyramid, Hexagonal, and Conical which had the equal lateral surface were considered. For the simulation, an open source CFD software was utilized. The lateral surfaces were put under identical amount of heat flux. Air as the coolant fluid was injected with constant inlet temperature from the trapdoors at the bottom of different shaped structures. Three different values of heat flux and air injection rate were evaluated for each shape. The outcomes presented that the conical shaped solar panel exhibits better thermal performance than other geometries. Furthermore, conical form finds the least temperature that was about 10.5 °C less than that of the pyramid-shaped panel. Furthermore, it was revealed that the corners of pyramid and hexagonal-shaped solar panels have higher temperature. Also, it was found that the efficiency of conical shaped panel was up to 8.4% more than that of pyramid-shaped panel.