Bamgbopa, Musbaudeen O.
Uzgoren, Eray
This paper presents a solar Organic Rankine Cycle (ORC) for electricity generation; where a regression based approach is used for the working fluid. Models of the unit's sub-components (pump, evaporator, expander and condenser) are also presented. Heat supplied by the solar field can heat the water up to 80-95 degrees C at mass flow rates of 2-12 kg/s and deliver energy to the ORC's heat exchanger unit. Simulation results of steady state operation using the developed model shows a maximum power output of around 40 kWe. Both refrigerant and hot water mass flow rates in the system are identified as critical parameters to optimize the power production and the cycle efficiency.


Modelling and performance evaluation of an organic rankine cycle (ORC) with R245FA as working fluid
Bamgbopa, Musbaudeen Oladiran; Uzgören, Eray; Sustainable Environment and Energy Systems (2012-5)
This thesis presents numerical modelling and analysis of a solar Organic Rankine Cycle (ORC) for electricity generation. A regression based approach is used for the working fluid property calculations. Models of the unit’s sub-components (pump, evaporator, expander and condenser) are also established. Steady and transient models are developed and analyzed because the unit is considered to work with stable (i.e. solar + boiler) or variable (i.e. solar only) heat input. The unit’s heat exchangers (evapor...
Computational analysis of a solar energy induced vortex generator
Mohiuddin, Abdullah; Uzgoren, Eray (2016-04-05)
This study presents a computational analysis of a device that mimics dust devils in a controlled environment in order to explore its capacity as an energy conversion apparatus in solar energy applications. Concept is built upon the buoyancy effect over a heated plate surrounded by stationary vertical thin plates (vanes), which cause swirl in the raising air. The novelty of the paper is that it is the first parametric study that investigates effects of vane width, vane height, number of vanes, and vane angle...
Numerical analysis ofdopant-freeasymmetric silicon heterostructure solar cell withSiO(2)as passivation layer
Mehmood, Haris; Nasser, Hisham; Tauqeer, Tauseef; Turan, Raşit (Wiley, 2020-08-01)
Conventional silicon heterojunction solar cells employ defects-prone a-Si:H layers for junction formation and passivation purposes. Substituting these layers with hole-selective MoO(x)and electron-selective TiO(x)can reduce parasitic absorption and energy band offsets issues associated with doped silicon films. In this work, dopant-free asymmetric heterostructure Si solar cells are studied with and without SiO(2)passivation layer, and their performance has been compared. The inclusion of ultrathin SiO(2)ins...
Comparisons and critical assessment of global and diffuse solar irradiation estimation methodologies
Karaveli, Abdullah Bugrahan; Akınoğlu, Bülent Gültekin (Informa UK Limited, 2018-01-01)
Defining better methodologies of accurate predictions of the amount of monthly mean daily global and diffuse solar irradiation exposed is of utmost importance in order to determine the potential for utilizing the solar energy. This study compares and discusses the main methodologies, databases, and software that are used in estimating the solar irradiation to be used for the short- and long-term performances and feasibilities of solar energy systems, especially photovoltaic power plants in Turkey, and addre...
Evaluation of hybridsolar-wind-hydrogenenergy system based on methanol electrolyzer
Budak, Yagmur; DEVRİM, YILSER (Wiley, 2020-10-01)
In this study, it is aimed to meet the annual electricity and heating needs of a house without interruption with the photovoltaic panel, wind turbine, methanol electrolyzer, and high temperature proton exchange membrane fuel cell system. The system results show that the use of the 2 WT with 18 PV was enough to provide the need of the methanol electrolyzer, which provides requirements of the high temperature proton exchange membrane fuel cell. The produced heat by the fuel cell was used to meet the heat requ...
Citation Formats
M. O. Bamgbopa and E. Uzgoren, “NUMERICAL ANALYSIS OF A SOLAR ORGANIC RANKINE CYCLE (ORC) UNIT WITH R245FA AS WORKING FLUID,” 2012, p. 195, Accessed: 00, 2020. [Online]. Available: