ORIGINAL_ARTICLE
An experimental investigation on the energy storage in a shape-memory-polymer system
In this paper, the effect of thermomechanical loading on the behavior of deflection-based harvested energies from a shape memory polymer system is experimentally investigated. Samples are created with honeycomb cells from poly-lactic acid using additive manufacturing techniques. The shape memory effect in shape recovery and force recovery paths are studied under thermomechanical tests in bending and tensile modes. The maximum recoverable strain energy is computed as well. According to the conducted thermomechanical tests, it is shown that the thermal expansion coefficient is much more dominant in the tensile mode. Some procedures are proposed to reduce the thermal expansion effect on the force recovery and arrive at higher energy harvested from a shape memory system.
https://www.energyequipsys.com/article_37668_24c64380c1a8cad781c8128d4f5b1efa.pdf
2019-12-01
309
316
10.22059/ees.2019.37668
Shape Memory Polymer
4D Printing
Energy Storage
Thermal Expansion
Nima
Roudbarian
roudbariannima@yahoo.com
1
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
AUTHOR
Mostafa
Baghani
2
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
LEAD_AUTHOR
Mahdi
Baniasadi
3
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
AUTHOR
Daniel
George
georged@unistra.fr
4
University of Strasbourg, CNRS, ICube Laboratory, 67000 Strasbourg, France
AUTHOR
Arman
Mohammadi
armanmohammadi7394@gmail.com
5
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
AUTHOR
[1] Leo, D.J., et al., Vehicular applications of smart material systems., in Smart Structures and Materials 1998: Industrial and Commercial Applications of Smart Structures Technologies. 1998. International Society for Optics and Photonics.
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[2] Butera, F., et al., Shape memory actuators for automotive applications. Nanotec IT newsletter. Roma: AIRI/nanotech IT, 2007: p. 12-6.
2
[3] Bil, C., K. Massey, and E.J. Abdullah, Wing morphing control with shape memory alloy actuators. Journal of Intelligent Material Systems and Structures, 2013. 24(7): p. 879-898.
3
[4] Van Langenhove, L. and C. Hertleer, Smart clothing: a new life. International journal of clothing science and technology, 2004. 16(1/2): p. 63-72.
4
[5] Sreekumar, M., et al., Critical review of current trends in shape memory alloy actuators for intelligent robots. Industrial Robot: An International Journal, 2007. 34(4): p. 285-294.
5
[6] Kheirikhah, M.M., S. Rabiee, and M.E. Edalat. A review of shape memory alloy actuators in robotics. in Robot Soccer World Cup. 2010. Springer.
6
[7] Chaterji, S., I.K. Kwon, and K. Park, Smart polymeric gels: redefining the limits of biomedical devices. Progress in polymer science, 2007. 32(8-9): p. 1083-1122.
7
[8] Mather, P.T., X. Luo, and I.A. Rousseau, Shape memory polymer research. Annual Review of Materials Research, 2009. 39: p. 445-471.
8
[9] Ebrahim, Y., B. Majid, and B. Mostafa, Numerical homogenization of coiled carbon nanotube reinforced shape memory polymer nanocomposites. Smart Materials and Structures, 2019.
9
[10] Balk, M., et al. Recent advances in degradable lactide-based shape-memory polymers. Advanced drug delivery reviews, 2016. 107: p. 136-152.
10
[11] Belmonte, A., et al., Epoxy-Based Shape-Memory Actuators Obtained via Dual-Curing of Off-Stoichiometric “Thiol–Epoxy” Mixtures. Polymers, 2017. 9(3): p. 113.
11
[12] Dogan, S., et al., Thermally induced shape memory behavior, enzymatic degradation and biocompatibility of PLA/TPU blends:“Effects of compatibilization.” Journal of the mechanical behavior of biomedical materials, 2017. 71: p. 349-361.
12
[13] Gong, X., et al., Variable stiffness corrugated composite structure with shape memory polymer for morphing skin applications. Smart Materials and Structures, 2017. 26(3): p. 035052.
13
[14] Baghani, M., R. Naghdabadi, and J. Arghavani, A semi-analytical study on helical springs made of shape memory polymer. Smart Materials and Structures, 2012. 21(4): p. 045014.
14
[15] Pei, E., 4D printing–revolution or fad? Assembly Automation, 2014. 34(2): p. 123-127.
15
[16] Tant, M., J. Henderson, and C. Boyer, Measurement and modeling of the thermochemical expansion of polymer composites. Composites, 1985. 16(2): p. 121-126.
16
[17] Gunes, I.S., F. Cao, and S.C. Jana, Effect of thermal expansion on shape memory behavior of polyurethane and its nanocomposites. Journal of Polymer Science Part B: Polymer Physics, 2008. 46(14): p. 1437-1449.
17
[18] Lasprilla, A.J., et al., Poly-lactic acid synthesis for application in biomedical devices—A review. Biotechnology advances, 2012. 30(1): p. 321-328.
18
[19] Zhang, Q., K. Zhang, and G. Hu, Smart three-dimensional lightweight structure triggered from a thin composite sheet via 3D printing technique. Scientific reports, 2016. 6: p. 22431.
19
[20] Arrieta, J.S., J. Diani, and P. Gilormini, Cyclic and monotonic testing of free and constrained recovery properties of a chemically cross-linked acrylate. Journal of Applied Polymer Science, 2014. 131(2).
20
[21] Abbasi-Shirsavar, M., M., Baghani, M. Taghavimehr, M. Golzar, M. Nikzad, M.Ansari, and D.George, An experimental-numerical study on shape memory behavior of PU/PCL/ZnO temary blend. Journal of Intelligent Material Systems and Structures, 2019. 30(1): p.116-126.
21
[22] Ansari, M., M. Golzar, M. Baghani, M. Abbasishirsavar, and M.Taghavimehr, Force recovery evaluation of thermo-induced shape-memory polymer stent: Material, process and thermo-viscoelastic characterization. Smart Materials and structures, 2019. 28(9).
22
[23] Baghani, M., R. Dolatabadi, and M., Baniassadi, Developing a finite element beam theory for nanocomposite shape-memory polymers with application to sustained release of drugs. Scientia Iranica, 2017. 24(1): p.249-259.
23
ORIGINAL_ARTICLE
Techno-Econo-Environmental study on the use of domestic-scale wind turbines in Iran
Existing fossil fuels do not meet the needs of modern societies and are almost coming to an end. Hence, governments can respond both to the needs of the people and the industry, by investing in the use of renewable energies. As well as saving fossil fuels, natural gas and even water. According to the research, renewable energy, especially wind energy, has been used in recent years and are able to satisfy some of the existing needs. The purpose of present study is to investigate the techno-econo-enviro use of domestic-scale wind turbines in Iran in order to select the optimal turbine according to the geographic location of each station in the country. At the present study, five types of wind turbines, including Generic 1kW, Generic 3kW, Generic 10kW, BWC XL 1.25kW and WES Tulipo 2.5kW have been used at all stations in the country to provide the most suitable type of turbine with the help of HOMER software and based on the geographic location of each station. The results showed that among all stations and types of wind turbines, the highest and lowest total net present cost (NPC) with 49131 $ and 11622 $ respectively are related to Zanjan and Alvand stations and Generic 1kW wind turbines. Also, the cost per kWh of produced wind electricity is 2.847 $ and 0.674 $ respectively at these stations. Also in the case of using hybrid wind-diesel system by Generic 1kW, Generic 3kW, BWC XL. 1.25kW, WES 2.5kW and Generic 10kW wind turbines at the all under study stations, annually generate a total of 246409, 213951, 212826, 122460 and 152030 Kg CO2 respectievely. Another point is that at Alvand, Arak, Babolsar, Iranshahr, Kashan, Khoy and Orumieh Generic 1kW wind turbine, at Anzali, Hamedan, Ramsar and Torbate Heydarie BWC XL. 1.25kW wind turbine, and at the 91 remaining stations WES 2.5kW wind turbine are the most economically feasible options.
https://www.energyequipsys.com/article_37669_64bb4147cd088c822b648d46ebc3da19.pdf
2019-12-01
317
338
10.22059/ees.2019.37669
Power Curve
Cost of Electricity
Diesel Fuel
CO2 emission
Total NPC
Tahmineh
Abdali
tahminea98@gmail.com
1
Department of Architecture, Sepehr institute of Higher Educational, Isfahan, Iran
AUTHOR
Somayeh
Pahlavan
somayehp1366@gmail.com
2
Department of Architecture, Sepehr institute of Higher Educational, Isfahan, Iran
AUTHOR
Mehdi
Jahangiri
jahangiri.m@iaushk.ac.ir
3
Department of Mechanical Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
LEAD_AUTHOR
Akbar
Alidadi Shamsabadi
a.alidadi@drbiau.ac.ir
4
Young Researchers and Elite Club, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
AUTHOR
Fahimeh
Sayadi
sayadi.f2009@gmail.com
5
Department of Electrical Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
AUTHOR
[1] Alamdari, P., Nematollahi, O., Mirhosseini, M., Assessment of wind energy in Iran: a review, Renewable and Sustainable Energy Reviews (2012) 16(1): 836-860.
1
[2] Jahangiri, M., Alidadi Shamsabadi A., Designing a horizontal-axis wind turbine for South Khorasan province: A case study, International Journal of Precision Engineering and Manufacturing (2017) 18(10): 1463-1473.
2
[3] Global wind energy council (GWEC), Global wind statistics 2017, (2018). http://gwec.net/wp-content/uploads/vip/GWEC_PRstats2017_EN-003_FINAL.pdf. Available: 07.05.2018.
3
[4] Ghorbani, N., Aghahosseini, A., Breyer, C., Transition towards a 100% renewable energy system and the role of storage technologies: a case study of Iran, Energy Procedia (2017) 135: 23-36.
4
[5] SATBA (Renewable Energy and Energy Efficiency Organization), Renewable Power Plants Geographical Map. http://www.satba.gov.ir, Available: 12.07.2018.
5
[6] Global wind atlas, https://globalwindatlas.info, Available: 12.07.2018.
6
[7] Syarifah A.R., Abdullah A.G., Hakim D.L., Nandiyanto A.B.D., Design of Hybrid Power System for Remote Area. In IOP Conference Series: Materials Science and Engineering (2018) 288 (1): 012010.
7
[8] Bulut F., Murat L.Ü.Y., Ertugrul Ç.A.M., The effects of incentives on renewable energy resources for home users, International Journal of Energy Applications and Technologies (2017) 4(2): 94-100.
8
[9] Usman, R., Gidado, A., Feasibility analysis of a grid connected PV/wind options for rural healthcare centre using homer, European Journal of Engineering and Technology (2017) 5(3): 12-20.
9
[10] Srivastava R., Giri V.K., Optimization of hybrid renewable resources using HOMER, International Journal of Renewable Energy Research (IJRER) (2016) 6(1): 157-163.
10
[11] Jahangiri M., Khosravi A., Raiesi H.A., Mostafaeipour A., Analysis of Standalone PV-Based Hybrid Systems for Power Generation in Rural Area, International Conference on Fundamental Research in Electrical Engineering, (2017) Jul.1-2, 1:1-10.
11
[12] Global petrol prices, Gasoline prices, liter,
12
https://www.globalpetrolprices.com/gasoline_prices, Available: 07.05.2018.
13
[13] Trading economics, Iran Interest Rate. https://tradingeconomics.com/iran/interest-rate, Available: 12.07.2018.
14
[14] Li C., Ge X., Zheng Y., Xu C., Ren Y., Song C., Yang C., Techno-economic feasibility study of autonomous hybrid wind/PV/battery power system for a household in Urumqi, China. Energy (2013) 55: 263-272.
15
[15] Jahangiri M., Nematollahi O., Sedaghat A., Saghafian, M., Techno-economical assessment of renewable energies integrated with fuel cell for off grid electrification: A case study for developing countries. Journal of Renewable and Sustainable Energy (2015) 7(2): 023123.
16
[16] Jahangiri M., Rizi R.A., Alidadi Shamsabadi A., Feasibility study on simultaneous generation of electricity and heat using renewable energies in Zarrin Shahr, Iran, Sustainable Cities and Society (2018) 38: 647-661.
17
[17] Abad M.R.A.A., Taraghdari M.B., Ali M.S., Mohagheghzadeh, F., Development of wind energy in Iran, International journal of advanced scientific and technical research (2012) 2(1): 228-234.
18
[18] IRENA (International Renewable Energy Agency), Renewable Energy and Jobs Annual Review 2018, Key facts (2018) 2-28, ISBN: 978-92-9260-062-4.
19
[19] Alidadi Shamsabadi A., Jahangiri M., Karimzadeh Bardei F., Raeisi H.A., Investigation of Sensitivity Analysis in the Generation of Renewable Electricity for a Hybrid System in Iran, The 12th international Energy Conference (IEC 2018), (2018) June 19-20, 12:1-14.
20
[20] Alamdari P., Nematollahi O., Jahangiri M., Feasibility study of wind energy for generate electricity in Province of Sistan and Baluchistan, case study: Nosrat Abad, The 3rd International Scientific Conference of Iranian Students in Belarus, Minsk, (2012) June 22–26.
21
[21] Jahangiri M., Nematollahi O., Sedaghat A., Saghafian M., Techno-economical assessment of renewable energies integrated with fuel cell for off grid electrification: A case study for developing countries, Journal of Renewable and Sustainable Energy (2015) 7(2): 023123.
22
[22] Riahi Zaniani J., Heydarian Dehkordi R., Bibak A., Bayat P., Jahangiri M., Examining the Possibility of Using Solar Energy to Provide Warm Water Using Retscreen4 Software (Case Study: Nasr Primary School of Pirbalut), Current World Environment (2015) 10(1): 1-7.
23
[23] Alidadi Shamsabadi A., Jahangiri M., Koohi Faeghm A., Raeisi Dehkordi A., Biogas production in a dairy cow unit to provide a sustainable solution for reducing the environmental pollutions and pathogens, The 11th international Energy Conference (IEC 2016), (2016) May 30-31, 11:1-9.
24
[24] Pahlavan S., Jahangiri M., Shamsabadi A., Khechekhouche A., Feasibility Study of Solar Water Heaters in Algeria, a Review, Journal of Solar Energy Research (2018) 3(2): 135-146.
25
ORIGINAL_ARTICLE
Towards sustainable machining of 17-4 PH stainless steel using hybrid MQL-hot turning process
The use of a minimum quantity of lubrication (MQL) with extremely low consumption of lubricant in machining processes has been reported as a technologically and environmentally feasible alternative to conventional flood cooling. In hot machining, the external heat source is applied during machining that will assist to increase machining performance. Many external heating techniques are available and each type has advantages/disadvantages. 17-4 PH stainless steel (AISI630) is martensitic stainless steel, which is widely used in energy equipment, aerospace and petrochemical industries. The objective of the present paper is to integrate MQL technique, for the first time, with a hot turning process for finding an optimum possible hybrid technique for a particular machining process. The effects of different machining parameters on MQL turning of 17-4 PH stainless steel have been investigated in comparison with dry and wet machining processes. Experiments were also designed for machining using MQL and dry techniques to evaluate surface roughness, tool wear, machined surface morphology, chip morphology as well as chip formation mechanism under different pre-heating temperatures. The results show that applying MQL technique with online thermally enhanced turning (MQL-hot turning) increases the efficiency of machining of 17-4 PH stainless steel. The cutting parameters and pre-heating temperature are important parameters and should be selected carefully when using hybrid MQL-hot turning. In addition, machining with MQL is beneficial to the environment and machine tool operator health as lubricant consumption during operation with MQL is 7-fold lower than in the conventional system.
https://www.energyequipsys.com/article_37670_a37ae6406a3356ad9ff70f2262a44cee.pdf
2019-12-01
339
352
10.22059/ees.2019.37670
Hybrid Machining
Hot Turning
Minimum Quantity Lubricant (MQL)
Surface roughness
17-4 PH Stainless Steel
Amirhossein
Moghadasi
moghadasii@ut.ac.ir
1
School of Mechanical Engineering, College of Engineering, University of Tehran, P.O. Box 11155/4563, Tehran, Iran
AUTHOR
Mohammadjafar
Hadad
m_j_hadad@yahoo.com
2
School of Mechanical Engineering, College of Engineering, University of Tehran, P.O. Box 11155/4563, Tehran, Iran
LEAD_AUTHOR
[1] Lauwers B, Klocke F, Klink A, Tekkaya AE, Neugebauer R, Mcintosh D (2014) Hybrid processes in manufacturing, CIRP Annals-Manufacturing Technology 63:561–583.
1
[2] Gupta K, Jain NK, Laubscher RF (2016) Hybrid Machining Processes; Perspectives on Machining and Finishing, Springer International Publishing AG Switzerland.
2
[3] Davim JP (2008) Machining: fundamentals and recent advances. Springer-Verlag, London, UK.
3
[4] Shaw MC (1996) Metal Cutting Principles. Oxford University Press, New York, USA.
4
[5] Ganta V, Chakradhar D (2014) Multi objective optimization of hot machining of 15-5PH stainless steel using grey relation analysis. Procedia Materials Science 5:1810-1818.
5
[6] Lajis MA, Nurul Amin A, Karim ANM, Radzi H, Ginta TL (2009) Hot Machining of Hardened Steels with Coated Carbide Inserts. American J. of Engineering and Applied Sciences 2:421-442.
6
[7] Wang ZY, Rajurkar KP, Fan J, Lei S, Shin YC, Petrescu G (2003) Hybrid machining of Inconel 718. International Journal of Machine Tools & Manufacture 43:1391–1396.
7
[8] Bermingham MJ, Palanisamy S, Dargusch MS (2012) Understanding the tool wear mechanism during thermally assisted machining Ti-6Al-4V. International Journal of Machine Tools & Manufacture 62(1):76-87.
8
[9] Masoudi S, Vafadar A, Hadad MJ, Jafarian F (2018) Experimental investigation into the effects of nozzle position, workpiece hardness, and tool type in MQL turning of AISI 1045 steel. Materials and Manufacturing Processes 33(9):1011–1019.
9
[10] Germain G, DalSanto P, Lebrun JL (2011) Comprehension of chip formation in laser assisted machining. International Journal of Machine Tools & Manufacture 51:230–238.
10
[11] Chien WT, Tsai CS (2003) The investigation on the prediction of tool wear and the determination of optimum cutting conditions in machining 17-4PH stainless steel. Journal of Materials Processing Technology 140:340–345.
11
[12] Rabiei F, Rahimi AR, Hadad MJ, Saberi A (2017) Experimental evaluation of coolant-lubricant properties of nanofluids in ultrasonic assistant MQL grinding. Int J Adv Manuf Technol 93:3935–3953.
12
[13] Khani S, Farahnakian M, Razfar MR (2015) Experimental study on Hybrid Cryogenic and Plasma-Enhaced Turning of 17-4PH Stainless Steel. Materials and Manufacturing Processes 30:868–874.
13
[14] Bermingham MJ, Kent D, Dargusch MS (2015) A new understanding of the wear processes during laser assisted milling 17-4 precipitation hardened stainless steel. Wear 328-329:518-530.
14
[15] Tawakoli T, Hadad MJ, Sadeghi MH (2010) Investigation on minimum quantity lubricant-MQL grinding of 100Cr6 hardened steel using different abrasive and coolant-lubricant types. International Journal of Machine Tools & Manufacture 50:698-708.
15
[16] Tawakoli T, Hadad MJ, Sadeghi MH, Daneshi A, Sadeghi B (2011) Minimum quantity lubrication in grinding: effects of abrasive and coolant-lubricant types. Journal of Cleaner Production 19:2088-2099.
16
[17] Sadeghi MH, Hadad MJ, Tawakoli T, Vesali A, Emami M (2010) An investigation on surface grinding of AISI 4140 hardened steel using minimum quantity lubrication-MQL technique. International Journal of Material Forming 3:241-251.
17
[18] Tawakoli T, Hadad MJ, Daneshi A, Sadeghi MH, Sadeghi B (2011) Study on the effects of abrasive and coolant-lubricant types on minimum quantity lubrication-MQL grinding. Advanced Materials Research 325:231-237.
18
[19] Hadad MJ, Tawakoli T, Sadeghi MJ, Sadeghi B (2012) Temperature and energy partition in minimum quantity lubrication-MQL grinding process. International Journal of Machine Tools & Manufacture 54-55:10-17.
19
[20] Rabiei F, Rahimi AR, Hadad MJ, Ashrafijou M (2015) Performance improvement of minimum quantity lubrication (MQL) technique in surface grinding by modeling and optimization. Journal of Cleaner Production 86:447-460.
20
[21] Hadad MJ, Sharbati A (2017) Analysis of the effects of dressing and wheel topography on grinding process under different coolant-lubricant conditions. Int J Adv Manuf Technol 90:3727-3738.
21
[22] Rabiei F, Rahimi AR, Hadad MJ (2017) Performance improvement of eco-friendly MQL technique by using hybrid nanofluid and ultrasonic-assisted grinding. Int J Adv Manuf Technol 93:1001-1015.
22
[23] Tawakoli T, Hadad MJ, Sadeghi MH (2010) Influence of oil mist parameters on minimum quantity lubrication-MQL grinding process. International Journal of Machine Tools & Manufacture 50:521-531.
23
[24] Hadad MJ (2015) An experimental investigation of the effects of machining parameters on environmentally friendly grinding process. Journal of Cleaner Production 108:217-231.
24
[25] Hadad MJ, Sadeghi B (2013) Minimum quantity lubrication-MQL turning of AISI 4140 steel alloy. Journal of Cleaner Production 54:332-343.
25
[26] Tawakoli T, Hadad MJ, Sadeghi MH, Daneshi A, Stöckert S, Rasifard A (2009) An experimental investigation of the effects of workpiece and grinding parameters on minimum quantity lubrication-MQL grinding. International Journal of Machine Tools & Manufacture 49:924-932.
26
[27] Hadad MJ (2010) Minimum Quantity Lubrication-MQL grinding process & investigation of surface quality. Ph.D. Thesis, Manufacturing Engineering Division, School of Engineering, Tarbiat Modares University, Tehran, Iran.
27
[28] Hadad MJ, Tawakoli T, Sadeghi MH, Sadeghi B (2012) Temperature and energy partition in minimum quantity lubrication-MQL grinding process. International Journal of Machine Tools & Manufacture 54:10-17.
28
[29] Hadad MJ, Sadeghi B (2012) Thermal analysis of minimum quantity lubrication-MQL grinding process. International Journal of Machine Tools & Manufacture 63:1–15.
29
[30] Sadeghi MH, Haddad MJ, Tawakoli T, Emami M (2009) Minimal quantity lubrication-MQL in grinding of Ti-6Al-4V titanium alloy. International Journal of Advanced Manufacturing Technology 44:487-500.
30
[31] Sivaiah P, Chakradhar D (2017) Experimental investigation on feasibility of cryogenic, MQL, wet and dry machining environments in turning of 17-4 PH stainless steel. Materials and Manufacturing Processes 32(15): 1775-1788.
31
[32] Toenshoff HK, Denkena B (2013) Basics of Cutting and Abrasive Processes. Springer-Verlag, London, UK.
32
[33] Klocke F (2011) Manufacturing Processes 1; Cutting. Springer-Verlag, London, UK.
33
ORIGINAL_ARTICLE
Experimental investigation of bubble growth and detachment in stagnant liquid column using image – based analysis
An experimental study has been carried out to characterize bubble formation, growth, and detachment mechanisms in a stagnant liquid column. Both bubble frequency and bubble detachment size were measured in different gas flow rates, injector diameters and orientations, submergence height, and liquid properties. Experiments were performed for air injection flow rate ranges between 200 mlph and 1200 mlph using needle diameters of 1.6, 1.19, 1.07, and 0.84 mm submerged in liquids with viscosities of 0.001, 0.1, 0.35, and 1 Pa.s. The data for bubble formation was obtained using a high-speed imaging technique. The results show that the bubble diameter at the departure increases as the needle diameter, liquid viscosity, and gas flow rate increase. In addition, the decrease in the submergence height results in a larger bubble at the departure. In order to analyze the changes in bubble detachment characteristics, a force modelling on a growing bubble was proposed. The experimental data were utilized for training a feed-forward back propagation neural network system to estimate the bubble detachment diameter. They were also used to propose a correlation to predict bubble diameter at the departure. The proposed correlation is found to be in the range of ± 8% of the obtained experimental data.
https://www.energyequipsys.com/article_37711_87d3b6c8cab308563d4f9483f198eb38.pdf
2019-12-01
353
375
10.22059/ees.2019.37711
Bubble growth
Bubble Detachment Characteristics
Bubble Diameter Correlation
Neural network
Erfan
Kosari
erfan.kosari@gmail.com
1
Department of Mechanical Engineering, University of California, Riverside, CA 92521, USA
LEAD_AUTHOR
Javad
Eshrgahi
2
Center of Excellence in Design and Optimization of Energy Systems, School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
AUTHOR
Wael H.
Ahmed
3
School of Engineering, University of Guelph, Guelph, Ontario, Canada
AUTHOR
Pedram
Hanafizadeh
hanafizadeh@ut.ac.ir
4
Center of Excellence in Design and Optimization of Energy Systems, School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
AUTHOR
[1] Ghofrani, Ali, Seyyed Danial Nazemi, and Mohsen A. Jafari. "HVAC load synchronization in smart building communities." Sustainable Cities and Society 51 (2019): 101741.
1
[2] Kosari, Erfan, Ali Rahnama, Mahyar Momen, Pedram Hanafizadeh, and Mohammad Mahdi Rastegardoost. "Drag coefficient and Strouhal number analysis of a rectangular probe in a two-phase cross-flow." Energy Equipment and Systems 6, no. 1 (2018): 7-15.
2
[3] Baniassadi, Amir, Mahyar Momen, Mehrdad Shirinbakhsh, and Majid Amidpour. "Application of R-curve analysis in evaluating the effect of integrating renewable energies in cogeneration systems." Applied thermal engineering 93 (2016): 297-307.
3
[4] Rollbusch, Philipp, Marc Becker, Martina Ludwig, Andrè Bieberle, Marcus Grünewald, Uwe Hampel, and Robert Franke. "Experimental investigation of the influence of column scale, gas density, and liquid properties on gas holdup in bubble columns." International Journal of Multiphase Flow 75 (2015): 88-106.
4
[5] Besagni, Giorgio, Pietro Brazzale, Alberto Fiocca, and Fabio Inzoli. "Estimation of bubble size distributions and shapes in a two-phase bubble column using image analysis and optical probes." Flow Measurement and Instrumentation 52 (2016): 190-207.
5
[6] Adetunji, Olubode, and Randhir Rawatlal. "Estimation of bubble column hydrodynamics: Image-based measurement method." Flow Measurement and Instrumentation 53 (2017): 4-17.
6
[7] Tate, Thomas. "XXX. On the magnitude of a drop of liquid formed under different circumstances." The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science 27, no. 181, (1864): 176-180.
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[8] Satyanarayan, A., R. Kumar, and N. R. Kuloor. "Studies in bubble formation—II bubble formation under constant pressure conditions." Chemical Engineering Science 24, no. 4 (1969): 749-761.
8
[9] Gerlach, D., G. Biswas, F. Durst, and V. Kolobaric. "Quasi-static bubble formation on submerged orifices." International Journal of Heat and Mass Transfer 48, no. 2 (2005): 425-438.
9
[10] Zhang, Lei, and Masahiro Shoji. "Aperiodic bubble formation from a submerged orifice." Chemical Engineering Science 56, no. 18 (2001): 5371-5381.
10
[11] Sada, Eizo, Akira Yasunishi, Shigeo Katoh, and Masashi Nishioka. "Bubble formation in flowing liquid." The Canadian Journal of Chemical Engineering 56, no. 6 (1978): 669-672.
11
[12] Prosperetti, A., and A. Lezzi. "Bubble dynamics in a compressible liquid. Part 1. First-order theory." Journal of Fluid Mechanics 168 (1986): 457-478.
12
[13] Georgoulas, Anastasios, P. Koukouvinis, Manolis Gavaises, and Marco Marengo. "Numerical investigation of quasi-static bubble growth and detachment from submerged orifices in isothermal liquid pools: The effect of varying fluid properties and gravity levels." International Journal of Multiphase Flow 74 (2015): 59-78.
13
[14] Oguz, Hasan N., and Andrea Prosperetti. "Dynamics of bubble growth and detachment from a needle." Journal of Fluid Mechanics 257 (1993): 111-145.
14
[15] Leibson, Irving, Eugene G. Holcomb, Anthony G. Cacoso, and John J. Jacmic. "Rate of flow and mechanics of bubble formation from single submerged orifices. I. Rate of flow studies." AIChE Journal 2, no. 3 (1956): 296-300.
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39
ORIGINAL_ARTICLE
Parametric study of a novel oscillatory wind turbine
Clean energy harvesting and usage has gained considerable attention in the last few decades. While the horizontal axis wind turbines have been used extensively, they have certain defects and functional limitations. In the present paper, a novel oscillatory wind turbine is proposed. The conceptual design of the new turbine together with its configuration is explained. Dynamical equations of the turbine are derived and numerical analysis of these equations is performed using a developed computer code. The simulated behavior of the oscillatory turbine agrees well with the general behavior of the wind turbines, and the values for the power coefficient are acceptable for a micro-sized wind turbine.
https://www.energyequipsys.com/article_37713_0e76bfd082c611b846f998854982408d.pdf
2019-12-01
377
387
10.22059/ees.2019.37713
Oscillatory Wind Turbine
Dynamical Governing Equations
Clean Energy Harvesting
parametric study
Radmarz
Hosseini
radmarzz@gmail.com
1
Department of Mechanical Engineering, College of Engineering, Fasa University, 74617-81189 Fasa, Iran
LEAD_AUTHOR
Reza
Roohi
re.roohi@gmail.com
2
Department of Mechanical Engineering, College of Engineering, Fasa University, 74617-81189 Fasa, Iran
AUTHOR
Goodarz
Ahmadi
goahmadi@clarkson.edu
3
Department of Mechanical & Aeronautical Engineering, Clarkson University, Potsdam, NY 13699-5725, USA
AUTHOR
[1] Hau, E., Wind Turbines: Fundamentals, Technologies, Applications, Economics. (2006) 2nd Ed, Springer – Verlag Berlin Heidelberg.
1
[2] EWEA (October 2009). "Wind Energy – the Facts, a Guide to the Technology, Economy, and Future of Wind Power," European Wind Energy Association. October 2009.
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3
[4] EWEA (February 2014). "Wind in power: 2013 European statistics", European Wind Energy Association. Retrieved 2014-11-05.
4
[5] Fraunhofer Institute (January 2015). "Electricity production from solar and wind in Germany in 2014 (German version)". Fraunhofer ISE website. Fraunhofer Institute, Germany. 5 January 2015. pp. 2, 3. Retrieved 5 January 2015.
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[6] EWEA (February 2017) "Wind in power: 2016 European statistics", European Wind Energy Association. February 2017.
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[8] Musial, W., Butterfield, S., and McNiff, B., Improving Wind Turbine Gearbox Reliability, an NREL Publication, NREL/CP-500-41548, May 2007.
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[10] NREL (2015). “NWTC Collaborative Increases Gearbox Reliability and Helps Reduce Cost of Wind Energy,” a National Renewable Energy Laboratory fact sheet, 2015.
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[11] Xavier Ortiz, David Rival, and David Wood, Forces and Moments on Flat Plates of Small Aspect ratio with Application to PV Wind Loads and Small Wind Turbine Blades, Energies 2015, 8, 2438-2453.
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[12] Steven C. Chapra, Raymond P. Canale, Numerical Methods for Engineers, 6th ed. Published by McGraw-Hill, New York, 2010.
12
[13] Iran Meteorological Organization (2015). “Wind Atlas of Fasa Meteorological Node.” (in Farsi)
13
ORIGINAL_ARTICLE
Effect of a ring type barrier and rotational speed on leakage flow of gas turbine brush seal
This paper investigates the effect of inserting a ring type barrier on leakage flow of brush seals with different bristles clearances (the distance between bristle pack tip and rotor surface). The ring is placed on both upstream and downstream sides of the bristles. An axisymmetric CFD model is employed to calculate radial pressure distribution along backing plate, axial pressure variation on rotor surface, and leakage mass flow rate of the brush seal. Reynolds-Averaged-Navier-Stokes (RANS) together with non-Darcian porous medium approach is performed to solve the flow field. The accuracy and reliability of the model are evaluated through comparison of the numerical results and experimental data. The results show that inserting the ring is not effective for the brush seal with zero clearance, neither at upstream nor at downstream. In other cases, the downstream ring is considerably more effective than the upstream one, when the ring is tangent to the back of bristles. The greater the distance between the bristles and the ring, the less reduction in leakage flow. Also, the best performance is obtained for the ring height equal to clearance size. Moreover, the effect of rotor rotation on leakage flow is investigated. The results show a negligible decrease in brush seal leakage flow with increasing the rotational speed.
https://www.energyequipsys.com/article_37843_edba83e3ae22494e8938663acb0db190.pdf
2019-12-01
389
399
10.22059/ees.2019.37843
Brush Seal
Leakage
Ring
CFD
barrier
Rotational Speed
Mohammad
Bahadori
bahadorimohammad93@gmail.com
1
Mechanical Engineering Department, Semnan University, Semnan, Iran
AUTHOR
Saadat
Zirak
s_zirak@semnan.ac.ir
2
Mechanical Engineering Department, Semnan University, Semnan, Iran
LEAD_AUTHOR
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[18] Bahadori, M., Zirak, S., Numerical investigation on effect of geometrical parameters and rotor speed on leakage flow of gas turbine brush seal, JOURNAL OF MECHANICAL ENGINEERING (University of Tabriz), (2019) 49(4): 37-45.
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