scholarly journals Experimental Study of a Lab-Scale Organic Rankine Cycle System for Heat and Water Recovery from Flue Gas in Thermal Power Plants

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4328
Author(s):  
Young-Min Kim ◽  
Assmelash Negash ◽  
Syed Safeer Mehdi Shamsi ◽  
Dong-Gil Shin ◽  
Gyubaek Cho
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Power Plants ◽  
Thermal Power ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Water Recovery ◽  
Cycle System ◽  
Fossil Fuel Power Plants

Fossil fuel power plants can cause numerous environmental issues, owing to exhaust emissions and substantial water consumption. In a thermal power plant, heat and water recovery from flue gas can reduce CO2 emissions and water demand. High-humidity flue gas averts the diffusion of pollutants, enhances the secondary transformation of air pollutants, and leads to smog weather; hence, water recovery from flue gas can also help to lessen the incidence of white plumes and smog near and around the power plant. In this study, a lab-scale system for heat and water recovery from flue gas was tested. The flue gas was initially cooled by an organic Rankine cycle (ORC) system to produce power. This gas was further cooled by an aftercooler, using the same working fluid to condense the water and condensable particulate matter in the flue gas. The ORC system can produce approximately 220 W of additional power from flue gas at 140 °C, with a thermal efficiency of 10%. By cooling the flue gas below 30–40 °C, the aftercooler can recover 60% of the water in it.

Organic Rankine Cycle as Bottoming Cycle to a Combined Brayton and Clausius - Rankine Cycle

2013 ◽  
Vol 597 ◽  
pp. 87-98
Author(s):  
Dariusz Mikielewicz ◽  
Jan Wajs ◽  
Elżbieta Żmuda
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Large Scale ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Working Fluid ◽  
Preliminary Evaluation ◽  
Organic Fluids ◽  
Steam Cycle

A preliminary evaluation has been made of a possibility of bottoming of a conventional Brayton cycle cooperating with the CHP power plant with the organic Rankine cycle installation. Such solution contributes to the possibility of annual operation of that power plant, except of operation only in periods when there is a demand for the heat. Additional benefit would be the fact that an optimized backpressure steam cycle has the advantage of a smaller pressure ratio and therefore a less complex turbine design with smaller final diameter. In addition, a lower superheating temperature is required compared to a condensing steam cycle with the same evaporation pressure. Bottoming ORCs have previously been considered by Chacartegui et al. for combined cycle power plants [ Their main conclusion was that challenges are for the development of this technology in medium and large scale power generation are the development of reliable axial vapour turbines for organic fluids. Another study was made by Angelino et al. to improve the performance of steam power stations [. This paper presents an enhanced approach, as it will be considered here that the ORC installation could be extra-heated with the bleed steam, a concept presented by the authors in [. In such way the efficiency of the bottoming cycle can be increased and an amount of electricity generated increases. A thermodynamic analysis and a comparative study of the cycle efficiency for a simplified steam cycle cooperating with ORC cycle will be presented. The most commonly used organic fluids will be considered, namely R245fa, R134a, toluene, and 2 silicone oils (MM and MDM). Working fluid selection and its application area is being discussed based on fluid properties. The thermal efficiency is mainly determined by the temperature level of the heat source and the condenser conditions. The influence of several process parameters such as turbine inlet and condenser temperature, turbine isentropic efficiency, vapour quality and pressure, use of a regenerator (ORC) will be presented. Finally, some general and economic considerations related to the choice between a steam cycle and ORC are discussed.

scholarly journals Selected aspects of operation of supercritical (transcritical) organic Rankine cycle

2015 ◽  
Vol 36 (2) ◽  
pp. 85-103 ◽  
Author(s):  
Szymon Mocarsk ◽  
Aleksandra Borsukiewicz-Gozdur
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Organic Rankine Cycle ◽  
Thermodynamic Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Two Phase ◽  
Medium Temperature ◽  
Water Steam ◽  
Supercritical Parameters

AbstractThe paper presents a literature review on the topic of vapour power plants working according to the two-phase thermodynamic cycle with supercritical parameters. The main attention was focused on a review of articles and papers on the vapour power plants working using organic circulation fluids powered with low- and medium-temperature heat sources. Power plants with water-steam cycle supplied with a high-temperature sources have also been shown, however, it has been done mainly to show fundamental differences in the efficiency of the power plant and applications of organic and water-steam cycles. Based on a review of available literature references a comparative analysis of the parameters generated by power plants was conducted, depending on the working fluid used, the type and parameters of the heat source, with particular attention to the needs of power plant internal load.

Selection of Working Fluids for Different Temperature Heat Source Organic Rankine Cycle

2012 ◽  
Vol 614-615 ◽  
pp. 195-199
Author(s):  
Guang Lin Liu ◽  
Jin Liang Xu ◽  
Bing Zhang
Keyword(s):  
Power Generation ◽  
Heat Source ◽  
Flue Gas ◽  
Thermal Power ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Source Power ◽  
Working Fluids ◽  
Cycle System ◽  
Temperature Heat

In the current paper, under the condition of different flue gas temperatures and constant flue gas thermal power, the influence of different organic working fluids on the efficiency of sub-critical organic Rankine cycle system were studied. The efficiency and other parameters of the simple system were calculated. The results show that the efficiency of sub-critical organic Rankine cycle system could reach maximum when the parameters of the working fluids in the expander inlet are dry-saturation. Flammability, toxicity, ozone depletion and other factors of the working fluids should be considered in the organic Rankine cycles. R245fa is considered a better choice for low-temperature heat source power generation, and the efficiency of the system is about 10.2%; for the high-temperature heat source, R601a can be considered; however, due to its high flammability, novel working fluids should be further discovered for power generation.

scholarly journals Perancangan Siklus Rankine Organik Untuk Pemanfaatan Gas Buang Pada PLTU di Indonesia

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Mohammad Azis M
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Alternative Energy ◽  
Waste Heat ◽  
Human Life ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Coal Power Plant ◽  
Coal Power

ABSTRAKEnergi merupakan kebutuhan pada kehidupan manusia. Sumber energi fossil yang digunakan untuk memenuhi kebutuhan energi semakin lama semakin menipis. Sehingga diperlukan sumber energi alternatif atau peningkatan efisiensi dalam pemanfaatan energi. Panas buang merupakan salah satu sumber energi alternatif. Pemanfaatan panas buang salah satunya adalah dengan menggunakan siklus rankine organik. PLTU memiliki panas buang yang berpotensi untuk dimanfaatkan. Temperatur gas buang pada PLTU yang rata-rata sebesar 150 oC. Proses perancangan dilakukan untuk memanfaatkan panas buang hasil pembakaran. Hasil perancangan sistem siklus rankine organik mampu menghasilkan daya sebesar 6053 kW (R142b), 5705 kW (R123), dan 5502 (Isopentane) serta efisiensi sebesar 18.54%, 18.51%, dan 17.85% untuk fluida kerja R142b, R123, dan Isopentane.Kata kunci: siklus rankine organik, gas buang, panas sisa ABSTRACTEnergy is needeed for human life. Fossil energy which used to fulfill our needs is diminished. So, alternative energy source is used. Waste heat are one of a kind energy alternative source. Organic rankine cycle can be used to utilitze waste heat. Coal power plant which have flue gas to utilized. Average flue gas temperature in coal power plant are 150 oC. Design process to utilize waste heat has been conducted. The power produced in the system are 6053 kW, 5705 kW, and 5502 kWalso the efficiency are 18.54%, 18,51%, and 17,85% for working fluid R142b, R123, and Isopentane respectively.Keyword: organic rankine cycle, waste heat, flue gas 

Thermodynamic Optimization of the Organic Rankine Cycle in a Concentrating Photovoltaic/Thermal Power Generation System

2013 ◽  
Vol 448-453 ◽  
pp. 1514-1518 ◽  
Author(s):  
Guo Chang Zhao ◽  
Li Ping Song ◽  
Xiao Chen Hou ◽  
Yong Wang
Keyword(s):  
Thermal Power ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Solar Photovoltaic ◽  
Solar Panels ◽  
Generation System ◽  
Evaporation Temperature ◽  
Cycle System ◽  
Power Generation System

The selection criteria of working fluids for solar thermal organic Rankine cycle and the features of R245fa as a working fluid are analyzed. A thermodynamic analysis of photovoltaic / thermal organic Rankine cycle system and the influence of evaporation temperature of working fluid in the evaporator coupled with solar panels are conducted. The results show that the performance of the solar photovoltaic/thermal organic Rankine cycle can be improved by optimizing the evaporation temperature, and 130°C is an appropriate evaporation temperature.

scholarly journals Multi-objective analysis of an influence of a brine mineralization on an optimal evaporation temperature in ORC power plant

2018 ◽  
Vol 70 ◽  
pp. 01005 ◽  
Author(s):  
Marcin Jankowski ◽  
Sławomir Wiśniewski ◽  
Aleksandra Borsukiewicz
Keyword(s):  
Power Plant ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Electricity Production ◽  
Working Fluid ◽  
Low Grade ◽  
Multi Objective ◽  
Evaporation Temperature ◽  
Cycle System ◽  
Low Grade Heat

The fact that Organic Rankine cycle system is very promising technology in terms of electricity production using low grade heat sources, necessitates constant research in order to determine the best cycle configuration or choose the most suitable working fluid for certain application. In this paper, multi-objective optimization (MOO) approach has been applied in order to conduct an analysis that is to resolve if there is an influence of a mineralization of a geothermal water on an optimal evaporation temperature in ORC power plant with R1234yf as the working fluid.

Waste Heat Recovery from Fly Ash of 210 MW Coal Fired Power Plant using Organic Rankine Cycle

2021 ◽  
pp. 1-33
Author(s):  
Nitin Hanuman Rodge ◽  
Goutam Khankari ◽  
Sujit Karmakar
Keyword(s):  
Energy Efficiency ◽  
Fly Ash ◽  
Power Plant ◽  
Power Plants ◽  
Electrostatic Precipitator ◽  
Waste Heat ◽  
Thermal Power ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Ash Content

Abstract Combustion of coal in thermal power plants generates Ash as a residue, which depends on the quality of coal, specific to its ash content and calorific value. In a typical Indian scenario, a standard 210 MW thermal plant produces ~57 T hr−1total ash, which has 80:20 fly and bottom ash share, considering coal with 40% ash content. This study aims to harness the waste heat of fly ash collected at the bottom of the Electrostatic Precipitator (ESP) by coupling Organic Rankine Cycle (ORC) with 210 MW subcritical coal-fired thermal power plant works on R134a. Thermodynamic properties of R134a are taken from the PYroMAT library (PYTHON 3.6) to develop a computer-based program that estimates the variability of key parameters with respect to Log Mean Temperature Difference (LMTD). The main plant's efficiency was 28.714%, with main steam pressure, reheat pressure, and temperature being about 134.35 bar, 24.02 bar, and 540oC, respectively, and combustion of coal is about 141.5 T hr−1. The study shows additional generation from fly ash waste heat is about 30.5 kW with an increase in net power output (0.0145%) and net energy efficiency (0.0146%). The Optimum value of LMTD for the Evaporator, Condenser and Recuperator is 40, 7, and 16 K, which yields the optimum energy efficiency and developed cost-effective design. The proposed system is economically analyzed, considering 25 years of equipment life and 14% of loan interest. The study shows that the payback period and the generation cost of electricity of ORC is about 6.22 years and INR 3.14 per kWh, respectively.

Hybrid Solar-Geothermal Power Generation to Increase the Energy Production From a Binary Geothermal Plant

2011 ◽  
Author(s):  
Giovanni Manente ◽  
Randall Field ◽  
Ronald DiPippo ◽  
Jefferson W. Tester ◽  
Marco Paci ◽  
...  
Keyword(s):  
Power Plant ◽  
Power Output ◽  
Energy Production ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Solar Thermal Energy ◽  
Geothermal Fluid ◽  
Industrial Grade ◽  
Design Values

This article examines how hybridization using solar thermal energy can increase the power output of a geothermal binary power plant that is operating on geothermal fluid conditions that fall short of design values in temperature and flow rate. The power cycle consists of a subcritical organic Rankine cycle using industrial grade isobutane as the working fluid. Each of the power plant units includes two expanders, a vaporizer, a preheater and air-cooled condensers. Aspen Plus was used to model the plant; the model was validated and adjusted by comparing its predictions to data collected during the first year of operation. The model was then run to determine the best strategy for distributing the available geothermal fluid between the two units to optimize the plant for the existing degraded geofluid conditions. Two solar-geothermal hybrid designs were evaluated to assess their ability to increase the power output and the annual energy production relative to the geothermal-only case.

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