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Introducing a dimensionless number as tank selector in hybrid solar thermal energy storage systems
Zaeem Moosavi Mohamadi,Hassan Zohoor 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.4
Using hybrid energy storage system is a method for increasing the storage capability of solar thermal energy. If multiple energy storage devices with complementary performance characteristics are used together, the resulting system will be a ‘Hybrid Energy Storage System’. In other words, a Hybrid Energy Storage System (HESS) has several media available for storage at any time. In this way, increase in storable energy is obtained without increasing collectors’ area. When there are more than one storage mediums, the system should be able to choose the best medium for storing energy according to the conditions. In the previous works, an optimizer program was used to find the proper medium along time. But running a computer optimizer program is almost time consuming. So, in this work, a recognition parameter is introduced which helps to select the proper tank in different conditions. Using this dimensionless parameter, the hybrid storage system won’t be always dependent to the optimizer. The results have been checked theoretically and experimentally.
Double Whammy: Concomitant Acute Type B Aortic Dissection and Acute Pulmonary Embolism
Amirkhosro Gouran,Hassan Safdari,Hamidreza Pouraliakbar,Omid Shafe,Jamal Moosavi,Bahram Mohebbi,Parham Sadeghipour 대한혈관외과학회 2020 Vascular Specialist International Vol.36 No.3
The concomitant occurrence of acute type B aortic dissection (TBAD) and acute pulmonary embolism (PE) is a rare but challenging condition. Although anticoagulation therapy is essential in the treatment of PE, it may increase the risk of aortic rupture and bleeding complications. We herein describe a patient with acute TBAD complicated by PE, which was successfully treated with early thoracic endovascular aortic repair (TEVAR) followed by anticoagulation. The present case report demonstrates that early TEVAR not only treats the aortic pathology but also allows the safe initiation of anticoagulation therapy.
Benyamin Anafjeh,Hassan Moosavi,Mohammad Danesh 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.4
Active tilting control is now one of the technologies utilized widely in high-speed railway vehicles. This paper tries to decrease the lateral acceleration on passengers (caused by high-speed motion in a curve) using an electrical anti-roll bar (ARB) that provides a limited amount of carbody tilt. A dynamic model is employed for a modern railway vehicle with its active anti-roll bar (AARB). Moreover, an attempt is made to design three control approaches of Kalman filter-based Model Predictive Control, Linear Quadratic Gaussian servo control, and proportional-integral regulator in such a way to be robust against noise and simultaneously improve ride comfort and vehicle dynamic performance. The active anti-roll bar acts as an actuator with a brushless DC (BLDC) motor, permitting active tilt control. Finally, the performance of the tilting vehicle and electric actuation system employing different control structures is assessed based on numerical simulations. Furthermore, a helpful comparison is drawn between the optimal and other simulated control approaches concerning ride comfort. The simulation results reveal better competency of Kalman filter-based Model Predictive Control in achieving the reference pursuit plus noise canceling and improving ride comfort.
Hamed Ziaei Poor,Hossain Ghorbani Menghari,Ricardo J. Alves De Sousa,Hassan Moosavi,Mahboubeh Parastarfeizabadi,Mahmoud Farzin,Hamed Sanei 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
Optimization of operating conditions is one of the most signicant issues concerning hydroforming the tubular components, includingstepped tubes, conical tubes, box shape tubes, and etc. Obtaining a sharp corner without any defects such as thinning and rupturingis one of the main goals in the production of these components. In order to manufacture tubes with filled corners, it is common toincrease the imposed pressure to the tubes. However, it may result in rupturing and thinning at the die corner radius, especially whenit is too small. In this paper, a new multistage die has been proposed for producing two stepped tubes. Numerical modeling has beenconducted using Abaqus/Explicit code. The results of simulation were afterwards checked against experiments in which it is shownthat a better thickness distribution could be obtained employing the proposed die set. There is no thinning in the final workpiece,particularly at the copper tube corners. Moreover, it could be possible to produce two stepped tubes with complete filled corners. Finally, comparing to other well-established methods, a lower pressure profile is required and a better thickness distribution can beachieved.