Investigation of thermal characteristics effects on exergoeconomic performance of the combined cycle of gas turbine modular Helium reactor with organic Rankine cycle
Naser
Shokati
دانشجوی دکتری، دانشکده مهندسی مکانیک، دانشگاه تبریز
author
Farzad
Mohammadkhani
دانشجوی دکتری، دانشکده مهندسی مکانیک، دانشگاه تبریز
author
Morteza
Yari
دانشیار، دانشکده مهندسی مکانیک، دانشگاه تبریز
author
Seyed Mohammad
Seyed Mahmoodi
دانشیار، دانشکده مهندسی مکانیک، دانشگاه تبریز
author
Seyed Faramarz
Ranjbar
استادیار، دانشکده مهندسی مکانیک، دانشگاه تبریز
author
text
article
2015
per
In the present work, the Gas Turbine Modular Helium Reactor (GT/MHR) combined with Organic Rankine Cycle (ORC) is simulated from the viewpoints of first and second laws of thermodynamics as well as the exergoeconomics. Temperature, pressure and exergetic cost of all streams are calculated and exergoeconomic performance of combined cycle is investigated. Attention is paid to the effects of the evaporator temperature, the pinch point temperature difference in the evaporator and the superheat degree of the organic fluid on the exergoeconomic performance of the combined cycle. The results of parametric study showed that as the evaporator temperature, Te, and pinch point temperature difference in the evaporator, ∆TE, increase, the unit cost of electricity produced by gas turbine is decreased. Furthermore, the exergy destruction cost rate is minimized at Tev=109 0C while the exergoeconomic factor is maximized at Tev=102 0C.
Iranian Journal of Mechanical Engineering Transactions of ISME
ISME
2538-4775
16
v.
4
no.
2015
6
24
https://jmep.isme.ir/article_27213_6ae19b05f7a5658797d77a8e2d37f792.pdf
Numerical study of change of length and non-uniform potential power of Zeta in micro-channels with branches are assessed by electroosmotic flow
Mohammadreza
Moavenian
کارشناسی ارشد مهندسی مکانیک، موسسه آموزش عالی اقبال لاهوری، مشهد
author
M.H.
Djavareshkian
Mech. Engg. Dept. Ferdowsi University of mashhad
author
text
article
2015
per
In this study, the fluid flow in multi micro-channel is simulated by the numerical method and length and non-uniform potential power of Zeta in micro-channel with branches are assessed with electroosmotic flow. In this process there are two types of electric field is defined, the first electric field, an external electric field is generated by the load on the anode and cathode electrodes and the second electric field due to the electric distribution network load in EDL occurs. The effect of electric fields are entered in the source term of momentum equations. Continuity and momentum equations are disceretized and solved. At first we tried to control the flow in the micro-channel by the electric field inside the micho-channel. Next we tried a local congestion at the branching point of the simulation. Eclipse is applied with two form, study of the power eclipse and the eclipse area length are considered. , In order to resolve eclipse in channel, try to change the electric field.
Iranian Journal of Mechanical Engineering Transactions of ISME
ISME
2538-4775
16
v.
4
no.
2015
25
54
https://jmep.isme.ir/article_27214_3b16ffd59d5c92332f22b2fe58b45ba8.pdf
Numerical simulation of direct injection homogenous charge combustion ignition engines with natural gas and diesel fuel
Alireza
Saatchi Nowbari
دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک، دانشگاه آزاد اسلامی، واحد تهران جنوب
author
Korosh
Atarian
دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک، دانشگاه آزاد اسلامی، واحد تهران جنوب
author
Masood
Yahyaei
دانشجوی کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران
author
Amin
Mirzamohammad
دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک، دانشگاه آزاد اسلامی، واحد تهران جنوب
author
Hosein
Ghomashi
استادیار، عضو هیات علمی گروه مهندسی مکانیک، دانشگاه آزاد اسلامی، واحد تهران جنوب
author
text
article
2015
per
Homogenous Charge Compression Ignition (HCCI) engines are new ideas for decreasing the fuel consumption in Compression Ignition engines. Due to regulations imposed on products regarding pollutants, numerous researches have been done on aforementioned engines as alternative engines to the routine diesel engines. Having utilized 3D CFD modeling, we have considered primarily combustion of homogenous diesel charge and then dual fuel combustion has been taken into account, noting that Diesel fuel is directly injected. In dual fuel, Methane is sucked in the cylinder as a mixed charge with air while diesel fuel is injected as said before. Results suggest that inlet temperature has a crucial role in vaporizing the liquid fuel and improvements in combustion. Meanwhile, in dual fuel combustion by reducing the inlet temperature and charging more Gas fuel inside the cylinder, not only the efficiency and the power increases but also pollutants stay at an acceptable level concerning the regulations and standards.
Iranian Journal of Mechanical Engineering Transactions of ISME
ISME
2538-4775
16
v.
4
no.
2015
55
80
https://jmep.isme.ir/article_27215_26a352333070e1007d46ffc5f802aad8.pdf
Field study of guide vane effect on inlet airflow pattern through radiator of Heller dry cooling tower
Mohammad Ali
Ranjbar
دانشجوی دکترای هوافضا، پژوهشکده مهندسی مکانیک، سازمان پژوهشهای علمی و صنعتی ایران
author
Mohammadali
Ardakani
Associate professor, Department of Mechanical Engineering, Iranian research organization for science and technology
author
Mohsen
Mazidi
دانشجوی دکترای مکانیک، پژوهشکده مهندسی مکانیک، سازمان پژوهشهای علمی و صنعتی ایران
author
text
article
2015
per
Wind is one of the environmental factors affecting the performance of the dry cooling tower. Given the identified adverse effects of wind on the dry cooling towers, Researchers have presented several ways to solve this problem which include the use of wind break wall, changing the geometry of the tower, and the gas injected into the tower. In this study, the use of guide vanes proposed as a new work and by using a structure with four vanes and install it in the weakest delta, The air flow pattern around the bottom of the tower and the tower deltas of Montazarghaem plant power has been checked in the field. The results of using guide vanes at the side sectors of tower shows that, Inflow to the sector, exited from the vortex mode and converted to a radial mode. Also, with increasing reference wind speed, Inflow velocity of side deltas of the tower with guide vanes increases linearly up to about 35 percent, while with no vanes decreases about 40 percent. Temperature distribution on delta located at the back of the vane also shows that the uniform temperature distribution on the surface of the radiator and the average rate decreased about of 1/9 °c and this value can be considered proportional to reduction in radiator temperature.
Iranian Journal of Mechanical Engineering Transactions of ISME
ISME
2538-4775
16
v.
4
no.
2015
81
97
https://jmep.isme.ir/article_27216_afda385ffa78f9bb0f7cf62162042b68.pdf
Energy conversion modelling of municipal waste applying hybrid gasifier-molten carbonate fuel cell system
Payam
Hooshmand
دانشجوی دکتری، دانشکده مهندسی مکانیک، دانشگاه صنعتی شریف
author
Farid
Sidin
کارشناسی ارشد، دانشکده مهندسی انرژی، دانشگاه صنعتی شریف
author
Ramin
Roshandel
مدیر گروه سیستم های انرژی، دانشگاه صنعتی شریف
author
text
article
2015
per
Biomass is one of the most commonly used renewable energy sources. Using synthesis gas that is generated from gasification of municipal solid waste in a high temperature fuel cell system can lead to an increase in the contribution of biomass in the future global energy supply. In addition it can cause a significant reduction in waste disposal costs and adverse environmental effects. In this paper municipal solid waste of Tehran is considered as the main feed of the proposed system. The proposed system can be considered as a new idea for using the municipal waste of Tehran. In this study, a thermodynamic equilibrium model was developed based on hybrid gasifier-molten carbonate fuel cell to evaluate the effect of waste moisture content on synthesis gas composition. In addition, equilibrium temperature and heating value of synthesized gas have been analyzed. Then, a thermodynamic model is presented for MCFC. The modeling results showed reasonable agreement with the experiment. The results showed a promising performance based on the heating value of synthesized gas, power production and economic analysis for gasification-MCFC power plant in Iran. Finally, an economic analysis for gasification-MCFC power plant with a capacity of 14 MW and 20 MW is presented.
Iranian Journal of Mechanical Engineering Transactions of ISME
ISME
2538-4775
16
v.
4
no.
2015
98
122
https://jmep.isme.ir/article_27217_5982fede0805fc3b2d405a96eb12045c.pdf