rankine cycle Articles
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Evaluation of a process simulator for modelling and analysis of Rankine cycle steam power plants
Applicability of the HYSYS process simulation package to thermodynamic modelling and analysis of Rankine cycle steam power plants, using first and second law analyses, has been evaluated. Theoretical Rankine cycles, and more realistic cycles based on power plants modelled in other studies, were simulated. Energy, exergy and efficiency values determined from the simulations were compared to those ...
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Extension of energy–utilisation diagram to power availability for exergy loss analysis
Energy–Utilisation Diagram (EUD) has been used to identify exergy loss in general process units, whereas Power Availability Diagram (PAD) provides the difference between exergy changes of two pressure exchangers. Two modifications of the original PAD are proposed for better exergy loss visualisation. Firstly, the energy donor curve is shifted to the location of energy acceptor. Secondly, arrows ...
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Performance analysis of the different Organic Rankine Cycles (ORCs) using dry fluids
This paper presents the first and second laws of thermodynamics analysis for organic Rankine cycles (ORCs), using dry organic fluids as the working fluids. The dry organic fluids for this study were R227ea, RC318, R236fa, Isobutane, R600a, R245fa, HFE7000, R123 and R113. Effects of the operating parameters such as turbine inlet temperature and pressure on the thermal efficiency, exergy ...
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A new Rankine cycle for hydrogen-fired power generation plants and its exergetic efficiency
A novel power generation cycle is proposed in this paper taking hydrogen as fuel and using steam generated by hydrogen firing as working fluid. The progress of the development work and side issues such as the application of hydrogen combustion turbines to environmentally clean fossil fuel power plants for early commercialisation of the system are reviewed. We propose the hydrogen-fired Rankine ...
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Improvement of regenerative Rankine cycle using absorption heat boosters
In the present work, a new technique is proposed for feedwater heating in Low Pressure (LP) turbine section of regenerative Rankine cycle. Main objective of this technique is to minimise exergy destruction in feedwater heating. The proposed technique comprised of using absorption heat boosters i.e. Absorption Heat Pump (AHP) and Absorption Heat Transformer (AHT) with LiBr–water as the working ...
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A necessary condition for optimum Rankine cycle power plants
Consumers pay more for electricity than necessary partly because commercial power plant operating criteria are not universally valid. Although such plants are commonly designed to provide electricity at least cost for given conditions, operating criteria lack a rigorous thermodynamic basis. The current empiricism alone costs US consumers billions of dollars per year. This dilemma exists because ...
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Study of available exhaust gas heat recovery technologies for HD diesel engine applications
Diesel engines reject a considerable amount of energy to the ambience through the exhaust gas. Significant reduction of engine brake-specific fuel consumption (bsfc) could be attained by recovering a significant part of exhaust gas heat. Various techniques have been proposed in the past to recover exhaust energy: mechanical, electrical turbocompounding and Rankine Bottoming Cycles. In the present ...
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Comparative exergy analysis of ammonia–water based Rankine cycles with and without regeneration
Power generation systems using an ammonia–water mixture instead of water as working fluid have attracted much research interest over the past 20 years, since they have a potential to convert more energy in low–grade heat source into power and to improve the power generating processes in several ways. In this work comparative exergy analysis based on the second law of thermodynamics is carried out ...
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Energy and exergy analysis of a novel multigeneration system producing cooling, heating, power and pure water
A novel multi–generation system producing power, pure water, cooling and heating is proposed and analysed in detail. The system comprises a hybrid generator-absorber heat exchanger (GAX), the Organic Rankine Cycle (ORC), the absorption heat transformer (AHT) and a desalination system. For comparison purposes, three working fluids, including R123, Isopentane and n–butane are considered in the ORC. ...
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Solarthermal parabolic trough power plants with integrated storage capacity
Parabolic trough power plants use concentrated direct insulation for steam generation in a Rankine cycle. The fundamentals for direct steam generation in parabolic troughs have been developed in recent years, the feasibility was successfully demonstrated at a solar powered test facility reaching steam temperatures of 400°C at a maximum pressure of 100 bar. Important components for the accelerated ...
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Renewable resource Trechwitz ORC - Case Study
This plant has an electrical output of 800 kW and a thermal power of 760 KW. At the biogas plant in Trechwitz, an unconventional heat utilisation model was installed. The waste heat from the CHP unit is used to generate power in an ORC unit (Organic Rankine Cycle). The heat goes into an evaporator, and the operating liquid is converted into pressurised steam. The steam is depressurised by a ...
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Exergy analysis of geothermal electricity using the Kalina cycle
The geothermal energy that is stored in the earth is so vast that could supply all the energy needed by humanity. The difficulty in tapping this energy lies in its diffusivity. The geothermal energy in regions near volcanoes is close to the surface and easy to use economically. In this paper a vapour dominated system will be examined. The electricity that is produced from such a system is ...
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Organic Rankine Cycle (ORC)
Biogas/Heat-to-Power Application using a Dreyer & Bosse CHP power unit Location: Trechwitz, Germany Site Gross Power Output Range 500Kwe + 30-35kWe from Electratherm ORC Thermal Heat Input Range: ?375-450kWt Hot Water Input Range:? 90-95°C (118-203°F) Hot Water Flow Range:? 39 m3/hour (172 GPM) Ambient Temperature: 0-15°C (32-59°F) ElectraTherm installed its first ...
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A solar thermal power system in the city of Thessalonica with the use of the Pinch method for entropy minimisation
The objective of this paper is to create a small power plant, (producing 2 MW annually), which will be using solar energy as a driving fuel. The system is made up of three sub-systems: a set of Solar Collectors (SCS), a Rankine power cycle and a Heat Exchanger Network (HEN). Two cases with variations in the operation of the solar collectors and the heat exchanger network will be examined. The ...
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South Tyrol 01 - ZE-50-LT - A Jenbacher Biogas-Fueled Genset - Case Study
Plant: 1 x ZE-50-LT Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 50 kWe Nominal output: 50 kWe Application: Heat recovery from engines (a Jenbacher biogas-fueled genset) Location: Province of Bozen, South Tyrol, Italy Manager: Private Italian firm The owner of this plant, a SME located near Bolzano/Bozen, Italy, decided to install a micro-thermolectric power plant on ...
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Veneto 01 - ZE-50-LT - Jenbacher Biogas-Fueled Genset - Case Study
Plant: 1 x ZE-50-LT Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 50 kWe Nominal output: 50 kWe Application: Heat recovery from engines (Jenbacher biogas-fueled genset) Location: Province of Venice, Veneto, Italy Manager: Private Italian firm The client who commissioned this plant is a livestock farm specializing in cattle and located in the province of Venice, Italy, ...
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Lombardy 01 - ZE-50-ULH - Two Jenbacher Biogas-Fueled Gensets - Case Study
Plant: 1 x ZE-50-LT Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 50 kWe Nominal output: 50 kWe Application: Heat recovery from engines (two Jenbacher biogas-fueled gensets) Location: Province of Mantua,Lombardy,Italy Manager: Private italian firm The client, located in the province of Mantua, Lombardy, Italy is a livestock farm specializing in pigs, which has decided to ...
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Lazio 01 - ZE-50-ULH - Heat Recovery from Processes and Engines - Case Study
Plant: 1 x ZE-50-ULH Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 50 kWe Nominal output: 50 KWe Application: Heat recovery from processes (pyrolitic gasification) and engines (syngas-fueled genset) Location: Province of Rome, Lazio, Italy Manager: Private italian firm The firm who commissioned this plant is the manager of a large cinema multiplex and related mall ...
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Korea 01 - ZE-40-ULH - Heavy Fuel Diesel Gensets - Case Study
Plant: 1 x customized ZE-40-ULH LT-ORC module, nominal output 30kWE, peak output 40kWE, max η= 9% Nominal output: 40kWE Application: Heat recovery from engines (Heavy fuel diesel gensets) Location: Yellow Sea, off the shores of South Korea Manager: Private Korean Firm This plant – our first installation in the Far East – is located in the main hamlet of a small island located ...
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Sicily 02 - ZE-50-ULH - Solar Concentrator Panels + Methane-Fueled Gas Boiler - Case Study
Plant: 1 x ZE-50-ULH Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 50 kWe Nominal output: 50kWe Application: Didactic hybrid plant (solar concentrator panels + methane-fueled gas boiler) Location: Province of Enna, Sicily, Italy Manager: Private Italian University The client who commissioned this plant is a recently-estabilished private university which has decided to ...
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