Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


24681.pdf (1.46 MB)

ETD Abstract Container

Abstract Header

Dynamic Modeling of Rankine Cycle using Arbitrary Lagrangian Eulerian Method

Ranade, Vishakhdutt
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491562460235764

Abstract Details

2017, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
Thermoelectric power plants are often based on Rankine cycle where the steam is cooled using water from a lake or a river. This water is recirculated in a cooling tower where a portion of the cooling water is lost to evaporation. To reduce water consumption in thermoelectric power plants, there is an urgent need to develop efficient air-cooled condensers for Rankine cycles. To this end, understanding how the Rankine cycle performance changes with diurnal temperature variation is essential. In the present study, a computational model was developed to simulate the transient behavior of a Rankine cycle and its response to changing ambient air temperature. The computation model is based on the Arbitrary Lagrangian Eulerian method incorporating the merits of Lagrangian and Eulerian techniques aiming towards a higher computational efficiency while accurately tracking the H2O mass moving through the boiler, turbine, condenser, and the pump. The model was developed using MATLAB and validated using available data. The model was first applied to simulate transient dynamics of a vapor compression cycle for which data were readily available in the literature. The validated model was then used to simulate a Rankine cycle. Parameters of interest for the computation included the delivery conditions for boiler, turbine, condenser and the resulting power output. Simulations were run with varying ambient temperature throughout the day. The maximum ambient temperature was varied to represent four locations in different regions of the United States. These results were compared to cycle operation under air pre-cooling which maintains a fixed maximum air temperature reaching the condenser. When the ambient air temperature increases, the condenser temperature and consequently its pressure increases. This results in a decrease in the turbine power output. This reduction in power output can be mitigated by maintaining the temperature of the air going to the condenser at the design condition. The increase in cycle efficiency obtained with air pre-cooling is plotted for four different locations. The developed computational model based on the Arbitrary-Lagrangian-Eulerian method is able to accurately capture the transient variation in Rankine cycle performance with varying ambient conditions.
Milind Jog, Ph.D. (Committee Chair)
Michael Kazmierczak, Ph.D. (Committee Member)
David Thompson, Ph.D. (Committee Member)
83 p.
Mechanical Engineering
Rankine Cycle; Arbitrary Lagrangian Eulerian; ALE; Lagrangian

Recommended Citations

Citations

  • Ranade, V. (2017). Dynamic Modeling of Rankine Cycle using Arbitrary Lagrangian Eulerian Method [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491562460235764

    APA Style (7th edition)

  • Ranade, Vishakhdutt. Dynamic Modeling of Rankine Cycle using Arbitrary Lagrangian Eulerian Method. 2017. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491562460235764.

    MLA Style (8th edition)

  • Ranade, Vishakhdutt. "Dynamic Modeling of Rankine Cycle using Arbitrary Lagrangian Eulerian Method." Master's thesis, University of Cincinnati, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491562460235764

    Chicago Manual of Style (17th edition)

ucin1491562460235764
180
© 2017, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.