Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 71 for “"Rankine Cycle"”.
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ANALYSIS OF A ROTATING SPOOL EXPANDER FOR ORGANIC RANKINE CYCLE APPLICATIONS
Increasing interest in recovering or utilizing low-grade heat for power generation
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Dynamic Model and Adaptive Control of a Transcritical Organic Rankine Cycle
The Transcritical Organic Rankine Cycle (TORC) is a non-linear time-varying heat recovery system for small-scale power generation. It is similar to a boiler-turbine system but uses organic fluid as the primary heat carrier instead of H2O and works in both subcritical and supercritical regions. The …
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Dynamic modeling of a steam Rankine Cycle for Concentrated Solar Power applications
… thesis aims at developing a model of a steam Rankine Cycle coupled to a field of parabolic troughs. The modeled system does not correspond to an existing plant, but its characteristics are defined as realistically as possible with information coming from different sources. Simplified but also …
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Design And Optimization Of Organic Rankine Cycle For Low Temperature Geothermal Power Plant
… for commercial power generation. Organic Rankine Cycle (ORC) technology makes it feasible to use low temperature resources to generate power by using low boiling temperature organic liquids. The first hypothesis for this research is that using ORC is technologically and economically …
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Conversion of a scroll compressor to an expander for organic Rankine cycle: modeling and analysis
… a scroll compressor to an expander for organic Rankine Cycle: modeling and analysis
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Charge-sensitive methods for the off-design performance characterization of organic Rankine cycle (ORC) power systems
The organic Rankine cycle (ORC) is among the most suited technologies to convert low-grade and low-capacity heat sources into useful work. For many reasons - including predictive control, optimal sizing or performance forecast - a proper understanding and characterization of the ORC behaviour under …
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A study of organic Rankine cycle systems with the expansion process performed by twin screw machines
… work was to study, model and analyse an Organic Rankine cycle (ORC) system using a twin screw expander to generate the power output, with HFC-245fa, as the working fluid. A software package (Power Plant Performance Prediction Program), simulating ORC system performance was therefore prepared for …
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Investigation of a heat pump reversible in an organic Rankine cycle and its application in the building sector
… the concept of reversible heat pump / organic Rankine cycle (HP/ORC) and its application in the building sector. Chapter one describes this HP/ORC system and its possible applications. A tool based on operating maps is developed to determine the feasibility of such a system depending on the …
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A comparison of fluid and heat control concepts for a binary Rankine cycle solar dynamic space power system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Dynamic modeling and control strategies for a micro-CSP plant with thermal storage powered by the Organic Rankine cycle
Organic Rankine cycle (ORC) systems are gaining ground as a means of effectively providing sustainable energy. Coupling small-scale ORCs powered by scroll expander- generators with solar thermal collectors and storage can provide combined heat and power to underserved rural communities. Simulation …
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A Unified Theory Characterising the Spontaneous Condensation Tendency of Working Fluids in Organic Rankine Cycle Expansion: Key Difference from Steam and its Implications
… various working fluids during a typical Organic Rankine Cycle (ORC) expansion from slightly superheated condition or dry-saturated condition directly into the saturation dome, in the context of an ORC expander. Traditional wisdom on steam Rankine cycles dictates that the expansion process be …
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Conceptual development and analysis of multiple integrated hydrogen production plants with Cu-Cl cycle
… and thermochemical water decomposition cycle, based on the chemical couple Cu-Cl. The first system consists of coal gasifier, membrane shift reactor, hydrogen fueled combined cycle, cryogenic air separation unit, compression system and five-step Cu-Cl cycle. The second system consists of …
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Design of a sodium-cooled epithermal long-term exploration nuclear engine
… more detailed design work. The boiling sodium Rankine cycle was selected for the power conversion unit, and the reactor core is an ultra high power density core with highly enriched uranium fuel. The sodium Rankine cycle has many advantages, lending to a highly efficient radiator and compact …
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Modeling and multi-objective optimization of a photovoltaic-thermal based multigeneration system
… This heat is being transferred to an organic Rankine cycle which not only produces electricity but also produces hot water for domestic applications. The organic Rankine cycle is also coupled with quadruple ammonia water absorption chiller. A part of the net electricity is used a PEM …
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Waste heat recovery from aluminum production
… production. Three scenarios, including organic Rankine cycle (ORC) system for electric power production, heat supply system and combined heat and power (CHP) system, were proposed to recover waste heat from the exhaust gas. The electric power generation potential is estimated by ORC models. The …
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Design of organic Rankine cycles for conversion of waste heat in a polygeneration plant
Organic Rankine cycles provide an alternative to traditional steam Rankine cycles for the conversion of low grade heat sources, where steam cycles are known to be less efficient and more expensive. This work examines organic Rankine cycles for use in a polygeneration plant that converts coal …
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Increasing Isentropic Efficiency with Hydrostatic Head and Venturi Ejection in a Rankine Power Cycle
… is commonly used to increase efficiency in a Rankine cycle the methods prove unfeasible in a small scale project. For this reason, a mathematical model and proof of concept design using hydrostatic head generated by elevation and venturi ejection for use by the condenser is developed along …
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Experimental investigation and mathematical modelling of dynamic equilibrium of novel thermo-fluids for renewable technology applications
… thermal system which consists of solar organic Rankine cycle and heat recovery units was designed, commissioned and tested experimentally. In the experiments, HFE 7000 refrigerant that has zero ozone depletion potential (ODP) and low global warming potential (GWP) was employed. The performance …
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LOW-EMISSIONS HYDROGEN FROM MCH DEHYDROGENATION: INTEGRATION WITH LNG REGASIFICATION
… separation, and generates power in an organic Rankine cycle to reduce/eliminate external electricity demand for hydrogen compression to the high (end use) pressure. A rigorous simulation-based optimization was performed to minimize external energy inputs. A case study with 100 tph MCH and 100 …
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Thermal management of the thermochemical Cu-Cl cycle linked with industrial processes for hydrogen production
… hydrogen production via copper-chlorine (Cu-Cl) cycle. The first system consists of single- and multi-stage reheat Rankine cycles, a four-step thermochemical Cu-Cl cycle, and a hydrogen compression system. Systems 2 consists of a thermochemical four-step hydrogen production Cu-Cl cycle, a …
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