Validation of an Organic Rankine Cycle Simulation Tool against European Stationary Cycle Test Modes

2017 ◽  
Author(s):  
Richard Merrett ◽  
John Murray ◽  
Doug Kolak
Keyword(s):  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Simulation Tool ◽  
Cycle Simulation ◽  
European Stationary Cycle

Organic Rankine Cycle Simulation Based on Aspen Plus

2014 ◽  
Vol 1070-1072 ◽  
pp. 1808-1811 ◽  
Author(s):  
Han Lv ◽  
Wei Ting Jiang ◽  
Qun Zhi Zhu
Keyword(s):  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Aspen Plus ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Low Grade ◽  
Evaporation Temperature ◽  
Cycle Simulation ◽  
Simulation Based ◽  
Low Grade Heat

Organic Rankine cycle is an effective way to recover low-grade heat energy. In order to improve system performance, for low-temperature waste heat of 120°C and R245fa,R600a,R227ea organic working fluid, using Aspen Plus software conducted simulation by changing the evaporation temperature. Results from these analyses show that decreasing the evaporation temperature, increasing thermal and exergy efficiencies, evaporating pressure, at the same time reduce steam consumption rate.

scholarly journals Ecotechnical Analysis of Gas Turbines Heat Recycling Using Organic Rankine Cycle (ORC) in Gas Pressure Amplification Facilities

2020 ◽  
Vol 4 (1) ◽  
pp. 1-10
Author(s):  
Chang Li ◽  
Yuchao Huang
Keyword(s):  
Gas Turbines ◽  
Power Efficiency ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Work Conditions ◽  
Simple Cycle ◽  
Joint Production ◽  
Cycle Simulation ◽  
Capital Return

Since the output temperature of the turbine in gas amplification stations is very high, there is the potential of using the joint production of heat and electricity. Organic Rankine Cycle (ORC), for recovering the waste heat of gas turbines, is being used around the world as a reliable and economical technology. This cycle has technical, economic and performance advantages comparing to the classic Rankine cycle. ORC cycle simulation using ASPEN HYSYS software was such that the simplest ORC cycle works with a single fluid and has the least efficiency among more advanced and common processes, is chosen to apply the choices and the work conditions of the sample station in. Since the executer companies of ORC cycle don’t use the simple cycle because of its low efficiency, we have used the simple process only to start simulating the more complicated cycles. If we assume pentane fluid to be the fluid of the simple cycle, we can get the pure output power, efficiency and capital return per different environment temperatures, turbo compressor’s other output discharges and also its different temperature, in various temperatures and different discharges. If the number of facilities which are equipped with the heat recovery system increases, the cost of each megawatt of produced power will significantly decrease and capital return decreases to two years or even less. Using the ORC cycle to return the capital under seven years is also justifiable economically.

scholarly journals Development and a Validation of a Charge Sensitive Organic Rankine Cycle (ORC) Simulation Tool

Energies ◽  
2016 ◽  
Vol 9 (6) ◽  
pp. 389 ◽  
Author(s):  
Davide Ziviani ◽  
Brandon Woodland ◽  
Emeline Georges ◽  
Eckhard Groll ◽  
James Braun ◽  
...  
Keyword(s):  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Simulation Tool ◽  
A Charge

scholarly journals Thermodynamic analysis of design and part-load operation of a novel waste heat recovery unit

2018 ◽  
Vol 245 ◽  
pp. 04010 ◽  
Author(s):  
Aleksandr Sebelev ◽  
Aleksandr Kirillov ◽  
Gennadii Porshnev ◽  
Kirill Lapshin ◽  
Aleksandr Laskin
Keyword(s):  
Gas Turbines ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Internal Combustion Engines ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Plant Performance ◽  
Part Load ◽  
Cycle Simulation

Organic Rankine Cycle (ORC) thermodynamic optimization is of critical importance while developing new plants. Optimization procedures may be imed at the highest efficiency as well as cost or sizing minimization. Optimization process is generally carried out for plant nominal rating. At the same time, part-load operation has to be carefully considered in case of waste heat recovery from flue gases coming from internal combustion engines or gas turbines. Gas mass flow and temperature variations are specific to this application, significantly influencing ORC plant performance. Secure prediction of part-load operation is of particular importance for assessment of plant power output, providing stability and safety and utilizing proper control strategy. In this paper design and off-design cycle simulation model is proposed. Off-design performance of the ORC cycle recovering waste heat from gas turbine unit installed at gas compressor station is considered. Major factors affecting system performance are outlined.

Aerodynamic Considerations in the Thermodynamic Analysis of Organic Rankine Cycles

2014 ◽  
Author(s):  
Maria E. Mondejar ◽  
Marcus Thern ◽  
Magnus Genrup
Keyword(s):  
Thermodynamic Analysis ◽  
Equations Of State ◽  
Organic Rankine Cycle ◽  
Thermodynamic Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Working Fluids ◽  
Turbine Efficiency ◽  
Cycle Simulation ◽  
Organic Rankine Cycles

Due to the increasing interest of producing power from renewable and non-conventional resources, organic Rankine cycles are finding their place in today’s thermal energy mix. The main influencers on the efficiency of an organic Rankine cycle are the working fluid and the expander. Therefore most of the research done up to date turns around the selection of the best performance working media and the optimization of the expansion unit design. However, few studies consider the interaction of the working fluids in the turbine design, and how this fact can affect the overall thermodynamic cycle analysis. In this work we aim at including the aerodynamic behavior of the working fluids and their effect on the turbine efficiency in the thermodynamic analysis of an organic Rankine cycle. To that end, we proposed a method for the estimation of the characteristics of an axial in-flow turbine in an organic Rankine cycle simulation model. The code developed for the characterization of the turbine behavior under the working fluid properties evaluated the irreversibilities associated to the aerodynamic losses in the turbine. The organic Rankine cycle was analyzed by using IPSEpro process simulator. A set of candidate working fluids composed of selected organofluorines and organochlorines was chosen for the analysis. The thermophysical properties of the fluids were estimated with the equations of state implemented in Refprop. Results on the energy and exergy overall performances of the cycle were analyzed for a case study with standard source and sink temperatures. For each fluid the number of stages and geometry of the turbine were optimized. It was observed that some working fluids that could initially be considered as advantageous from a thermodynamic point of view, had an unfavorable impact on the turbine efficiency, thus increasing the irreversibilities of the cycle. We concluded that if the influence of the working fluid on the turbine performance is underestimated, the real performance of the organic Rankine cycle could show unexpected deviations from the theoretical results.

Model, simulation and experiments for a Buoyancy Organic Rankine Cycle

2020 ◽  
Vol 92 (1) ◽  
pp. 10906
Author(s):  
Jeroen Schoenmaker ◽  
Pâmella Gonçalves Martins ◽  
Guilherme Corsi Miranda da Silva ◽  
Julio Carlos Teixeira
Keyword(s):  
Model Simulation ◽  
Organic Rankine Cycle ◽  
Thermodynamic Cycle ◽  
Rankine Cycle ◽  
Test Body ◽  
Working Fluid ◽  
Proof Of Concept ◽  
Energy Scenario ◽  
New Type ◽  
Fluid Reservoir

Organic Rankine Cycle (ORC) systems are increasingly gaining relevance in the renewable and sustainable energy scenario. Recently our research group published a manuscript identifying a new type of thermodynamic cycle entitled Buoyancy Organic Rankine Cycle (BORC) [J. Schoenmaker, J.F.Q. Rey, K.R. Pirota, Renew. Energy 36, 999 (2011)]. In this work we present two main contributions. First, we propose a refined thermodynamic model for BORC systems accounting for the specific heat of the working fluid. Considering the refined model, the efficiencies for Pentane and Dichloromethane at temperatures up to 100 °C were estimated to be 17.2%. Second, we show a proof of concept BORC system using a 3 m tall, 0.062 m diameter polycarbonate tube as a column-fluid reservoir. We used water as a column fluid. The thermal stability and uniformity throughout the tube has been carefully simulated and verified experimentally. After the thermal parameters of the water column have been fully characterized, we developed a test body to allow an adequate assessment of the BORC-system's efficiency. We obtained 0.84% efficiency for 43.8 °C working temperature. This corresponds to 35% of the Carnot efficiency calculated for the same temperature difference. Limitations of the model and the apparatus are put into perspective, pointing directions for further developments of BORC systems.

EXPERIMENTAL STUDY ON PUMP APPLIED IN ORGANIC RANKINE CYCLE SYSTEM

2017 ◽  
Author(s):  
Weicong Xu ◽  
Li Zhao ◽  
Shuai Deng ◽  
Jianyuan Zhang ◽  
Wen Su
Keyword(s):  
Experimental Study ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Cycle System
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