Organic mixed working medium of steam turbine

Abstract

The invention belongs to the technical field of organic working mediums and in particular relates to an organic mixed working medium of a steam turbine. The sum of the mass percentage of the components is 100%; the working medium consists of R245fa and R123; the mass percentage of the R245fa to the R123 is (60-70) : (30-40). The working medium has different-temperature thermodynamic characteristics in a constant-pressure evaporation or condensation process. The working medium is optimally matched with cold / heat source temperature in evaporation equipment or condensation equipment by selecting the components of the mixed organic working medium and optically selecting the proportion of the components. Bubbles generated by the low-boiling-point organic working medium in the pipe generates perturbation action on the mixed organic working medium by utilizing the non-azeotropic characteristic of the mixed working medium, so that a heat transfer enhancement effect is achieved, the boiling heat transfer coefficient is increased, the optimal region of the heat transfer coefficient is enlarged, the heat transfer coefficient is increased by 6 to 10% through experimental test, and the area of heat transfer equipment is reduced.

Description

technical field [0001] The invention relates to an organic mixed working medium of a steam turbine, which belongs to the technical field of organic working medium. Background technique [0002] At present, the single organic working fluid organic Rankine cycle has been practically applied in the field of power generation, but the optimization problem of the single organic working medium Rankine cycle power generation system is the organic working medium Rankine cycle power generation, in the structure optimization of low temperature waste heat power generation system, Issues to be faced in reducing the cost of waste heat power generation systems. Although mixed organic working fluids have been applied in air-conditioning refrigeration and heat pump equipment, they have not been practically applied in organic Rankine cycle technology for low-temperature waste heat power generation. Contents of the invention [0003] Based on the above deficiencies in the prior art, the tec...

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Problems solved by technology

[0002] At present, the single organic working fluid organic Rankine cycle has been practically applied in the field of power generation, but the optimization problem of the single organic working medium Rankine cycle power generation system is the organic working medium Rankine cycle power generation, in the structure optimization of low temperature waste heat power generation system, Problems to be faced in reducing the cost of waste heat power generation system

Although mixed organic working fluids have been applied in air-conditioning refrigeration and heat pump equipment, they have not been practically applied in organic Rankine cycle technology for low-temperature waste heat power generation.