Organic Rankine Cycle Articles

  • 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 ...


    By Wolf Power Systems GmbH

  • Case study - green machine in Romania running off geothermal brine

    Gross Power Output Avg: 50kWe Thermal Heat Input: 700kWt Hot Water Input Range: 105°C Hot Water Flow: 10.1 l/s Average Ambient Temp: 12°C The Green Machine was commissioned at a geothermal well in Romania. The machine produces 50kW (gross) of electricity from the geothermal hot water (216°F/102°C) without any fuel or emissions. To further increase the ...


    By ElectraTherm

  • 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 ...


    By Inderscience Publishers

  • 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 ...


    By Inderscience Publishers

  • 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 ...


    By Wolf Power Systems GmbH

  • 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 ...


    By Inderscience Publishers

  • 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 ...


    By Inderscience Publishers

  • 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 ...


    By Inderscience Publishers

  • 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 ...


    By Inderscience Publishers

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