iosr-JMCE   Volume-20 ~ Issue-5 ~ Sep. – Oct. 2023

Abstract: Researchers have extensively explored diverse methods to enhance heat transfer rates in conjunction with reducing the size and cost of heat exchanger systems. In pursuit of these objectives, passive heat transfer techniques have played a pivotal role, with the deployment of inserts being a prominent tool to augment turbulence within the flow. Prior research has conducted comprehensive investigations, both experimentally and numerically, into a variety of insert designs, encompassing twisted tape, wire coils, swirl flow generators, ribs, louvered strips, conical rings, and alterations in tube geometry, including the transition from plain tubes to conical configurations. These methodologies have aimed at improving several critical parameters within heat exchangers. Through an in....

Keywords: Heat Exchangers, conical tape inserts , Nanofluids

[1]. Smith Eiamsa ard and Pongjet Promvonge (2005), "Enhancement of heat transfer in a tube with regularly spaced helical tape swirl generators", Solar Energy 78(2005), pp: 483-494.
[2]. Smith Eiamsa ard, Chinaruk Thianpong and Pongjet Promvonge (2006), "Experimental Investigation of Heat Transfer and flow friction in a Circular Tube fitted with Regularly Spaced Twisted Tape Elements", International Communications in Heat and Mass Transfer 33(2006), pp: 1225-1233.
[3]. M. Raja a, R.M. Arunachalam b and S. Suresh, "Experimental studies on heat transfer of alumina /water nanofluid in a shell and tube heat exchanger with wire coil insert". International Journal of Mechanical and Materials Engineering (IJMME), Vol. 7 (2012), No.1, 16–23.
[4]. A.V.Gawandare, Prof. M.M.Dange, Prof.D.B.Nalawade, "Heat Transfers Enhancement with Different Square Jagged Twisted Tapes". International Journal of Engineering Research and Applications, ISSN: 2248-9622, Vol. 4, Issue 3(Version 1), March 2014, pp.619-624.
[5]. P. Promvonge, "Heat transfer behaviors in round tube with conical ring inserts". Energy Conversion and Management 49 (2008) 815.

Abstract: The integration of nanofluids and conical inserts has garnered significant attention in the pursuit of enhancing heat transfer within heat exchangers. This research delves into the cooperative influences of these two techniques aimed at augmenting heat transfer processes. Nanofluids, comprising base fluids infused with nanoparticles, bring forth improved thermal properties, while the incorporation of conical inserts modifies fluid flow patterns, thereby facilitating more efficient heat transfer mechanisms. The study systematically investigates the repercussions of diverse nanofluid categories and various conical insert configurations on the performance of heat exchangers. By methodically varying parameters such as nanofluids, insert designs, and alterations in flow conditions, the objective is to optimize heat transfer efficiency, all while taking into account the consequential pressure drop......

Keywords: Heat exchanger, Nano fluid, twist ratio, conical inserts

[1]. Fatma Oflaz , Orhan Keklikcioglu , Veysel Ozceyhan , "Investigating thermal performance of combined use of 𝑆𝑖𝑂2-water nanofluid and newly designed conical wire inserts, Case Studies in Thermal Engineering, 38 (2022) 102378".
[2]. Mohamed Iqbal Shajahan , Jee Joe Michael , M. Arulprakasajothi , Sivan Suresh , Emad Abouel Nasr and H. M. A. Hussein , " Effect of Conical Strip Inserts and ZrO2/DI-Water Nanofluid on Heat Transfer Augmentation: An Experimental Study" ,Energies 2020, 13, 4554.
[3]. Orhan Keklikcioglu, Veysel Ozceyhan," Thermohydraulic performance evaluation for horizontal tube by using combination of modified coiled wire inserts and graphene nanoplatelet-water nanofluids", International Communications in Heat and Mass Transfer 123 (2021) 105206.
[4]. H.A. Mohammed, Husam A. Hasan, M.A. Wahid," Heat transfer enhancement of nanofluids in a double pipe heat exchanger with louvered strip inserts, Int. Commun. Heat Mass Transf. (2012),
[5]. Bahiraei, M. Mazaheri, N. Alighardashi, M. Development of chaotic advection in laminar flow of a non-Newtonian nanofluid: A novel application for efficient use of energy. Appl. Therm. Eng. 2017, 124, 1213–1223.

Abstract: There is a growing concern with worldwide deterioration of traditional materials such as concrete and steel. Recently, attention has shifted to use fiber reinforced polymer composites (FRPs) as alternative materials. FRP materials used in many structural engineering applications, especially in the reinforcement and strengthening of various structural elements in concrete buildings and in view of the many advantages of these materials, such as, high tensile strength, high strength and modulus values compared to their density, low weight, thermal expansion, Non-corrosive nature material.......

Keywords: Glass; Carbon; fiber reinforced polymer; Finite element analysis

[1]. El-Kasaby E.A, Awwad M, Roshdy M, Abo-Shark A.A. "Behavior of square footings reinforced with glass fiber bristles and biaxial geogrid''. European Journal of Engineering and Technology Research. June 2023.
[2]. El-Kasaby E.A, Awwad M, Roshdy M, BADAWI M. "Behavior of piles reinforced by geosynthetics under lateral load''. MSA Engineering Journal, Mar 2023.
[3]. Hadad H.S, Nooman M.T, Saleh K.A, "Behaviors of isolated footings reinforced with glass fiber bars''. Al-Azhar University Civil Engineering Research Magazin. 2021.
[4]. El-Kasaby E.S, and Ab-Elmeged M.F "Performance of isolated footings reinforced randomly by glass fiber". Journal of Engineering Research and Reports. June 2019.
[5]. Kakusha V., Kornev O., Kovalev M., Lapshinov A., & Litvinov, E. "GFRP- reinforced foundation slab design for 15 story residential building''. Durability and Sustainability of Concrete Structures. 2018.

Abstract: This article mainly introduces the structure and degree of freedom analysis of Delta parallel robot. Using space geometry and vector algebra methods to establish a simplified kinematics model of a parallel robot .Use geometric solution method to perform forward kinematic solution, the inverse solution is relatively simple, which is to calculate the joint angle based on the position of the end platform. Finally, the workspace is simulated and analyzed through Matlab software to verify that the parallel robot meets the needs of actual engineering applications..

Keywords: Delta parallel robot; Kinematics analysis; Workspace; Matlab

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[3]. Feng Lihang, Zhang Weigong, Gong Zongyang, etc. Research progress and current situation of Delta series parallel robots [J]. Robot, 2014, 36(03): 375-384.
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[6]. Chen X S, Chen Z L, Kong X M. Recent development and current status of Stewart platform research[J]. Robot, 2002, 24(5): 464-470..

Abstract: The blast load is the dynamic load that an engineer may face during the design procedure. This paper used the ABAQUS program to simulate reinforced concrete (RC)beams retrofitted with GFRP sheets subjected to blast loads. The experiment data is simulated in the ABAQUS program to validate the ABAQUS modeling, it was collected from a last experiment research. The deflection, reaction force, and damage mode of RC beams under blast loading are studied. The dimension models are 2500x 250 x 150 mm. The characteristic compressive strength of concrete.......

Keywords: Blast load, Explosion waves, RC beams, ABAQUS, GFRP, retrofitting techniques

[1]. Y. Temsah, A. Jahami, J. Khatib, and M. Sonebi, "Numerical analysis of a reinforced concrete beam under blast loading," MATEC Web Conf., vol. 149, p. 02063, 2018, doi: 10.1051/matecconf/201814902063.
[2]. A. Jahami, Y. Temsah, and J. Khatib, "The efficiency of using CFRP as a strengthening technique for reinforced concrete beams subjected to blast loading," Int. J. Adv. Struct. Eng., vol. 11, no. 4, pp. 411–420, Dec. 2019, doi: 10.1007/s40091-019-00242-w.
[3]. Housing and Building National Research Center, Egyptian specification for blast resistant buildings SPEC 905. Cairo, 2016.
[4]. American Concrete Institute (ACI) 370r-14, Report for the design of concrete structures for blast effects. 2014.
[5]. Unified Facilities Criteria (UFC) 3-340-02, structures to resist the effects of accidental explosions. U.S. Department of Defense (DoD), 2008. [Online]. Available: http://dod.wbdg.org/..

Abstract: Given the existing losses due to evaporation of any type of fuel as well as the pollution that goes into the environment that many diseases are found with, including the effects on the respiratory system as well as explosions, one of the most dangerous is natural gas, LP, which can be Use the same procedure to design a home or commercial one. This article addresses the problem of gasoline, one of the most dangerous because there is a very large vehicle fleet in our country, Mexico. The storage containers, as well as in its dispatch, produce polluting emissions because gasoline......

Keywords: Condensers, Refrigerants, Pollution, Explosion

[1]. Chemical Hazard Response Information System (CHRIS) Hazardous Chemical Data (Ref. 3-29) COMDTINST M16565.12C Is Available Online At Www.Chrismanual.Com. Reactivity Group, Water Reactivity, And Reactivity With Common Materials Are Given, As Well As Bulk Cargo Compatibility Matrix
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