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Method and turbine for expanding an organic operating fluid in a rankine cycle

A technology of working fluid and Rankine cycle, which is applied in the direction of machines/engines, mechanical equipment, steam engine devices, etc., and can solve problems such as technical difficulties

Active Publication Date: 2014-09-24
TURBODEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes an increase in production costs, as well as technical difficulties for starting, stopping and operating the equipment

Method used

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  • Method and turbine for expanding an organic operating fluid in a rankine cycle
  • Method and turbine for expanding an organic operating fluid in a rankine cycle
  • Method and turbine for expanding an organic operating fluid in a rankine cycle

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Embodiment Construction

[0060] figure 1 is a partial view in an axially symmetrical section of an expanded turbine 1 for organic working fluids according to the invention.

[0061] Preferably, the working fluid belongs to hydrocarbons, more preferably to cyclic hydrocarbons. For example, the working fluid is cyclopentane.

[0062] The turbomachine comprises a shaft 2 extending in an axial direction X, a casing 3 or volute, and a plurality of arrays S of stator blades alternating with each other 1 -S n and multiple rotor blade arrays R 1 -R n , that is, according to scheme S 1 -R 1 ;S 2 -R 2 ;S n -R n Wait.

[0063] Specifically, the turbine 1 is conceptually divided into a first section A and a subsequent section B according to the expansion direction of working fluid vapor. In the first section A (called the high-pressure section), the first expansion of the working fluid is provided in a substantially radial direction, that is to say in a direction orthogonal to the X-axis; in the secon...

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Abstract

It is described a method for expanding an organic operating fluid in a Rankine cycle, comprising the step of feeding the operating fluid to a turbine provided with a plurality of arrays of stator blades alternating with a plurality of arrays of rotor blades, to define corresponding turbine stages, constrained to a shaft which rotates on the respective rotation axis. Advantageously the method comprises the further steps of: a) causing a first expansion of the operating fluid in one or more radial stages of the turbine, b) diverting the operating fluid exiting from the radial stages in a direction axial and tangential with respect to the rotation axis, and c) causing a second fluid expansion in one or more axial stages of the turbine.; Step b) corresponds to an enthalpy change of the operating fluid equal to at least 50% of the average enthalpy change provided for completing the fluid expansion in the turbine. It is further described a turbine for expanding an organic operating fluid in a Rankine cycle, which allows to carry out the method above.

Description

technical field [0001] The invention relates to a method for expanding an organic working fluid in a Rankine cycle and to a turbine allowing such a method to be carried out. This application claims priority from Italian Patent Application No. BS2012A000008 filed on December 20, 2011. Background technique [0002] Thermodynamic cycles of the Rankine type are often identified by the acronym ORC "Organic Rankine Cycle" and are used in corresponding devices to generate electrical energy starting from thermal energy using an organic working fluid of high molecular mass . [0003] For example, ORC plants are used to co-generate electricity and heat starting from solid biomass, alternatively using waste heat from industrial processes, heat recovery from prime movers, or geothermal sources. [0004] For example, ORC facilities supplied with biomass typically include: [0005] - combustion chamber supplied with fuel biomass; [0006] - a heat exchanger provided to impart a portio...

Claims

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Application Information

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IPC IPC(8): F01K25/10F01D9/04F01D1/04F01D1/06F01D1/12
CPCF01K25/10F01K7/16F01K7/02F01D1/04F01D1/06F01D1/12Y02E20/14
Inventor 马里奥·盖亚罗伯特·比尼
Owner TURBODEN