Assessment method for leakage safety of mixed working medium in organic Rankine cycle system

A technology of mixed working fluid and circulation system, applied in the direction of climate sustainability, sustainable manufacturing/processing, energy industry, etc., can solve the safety assessment of flammable mixed working fluid, etc., to achieve strong practicability and improve safety performance Effect

Inactive Publication Date: 2017-10-27
TIANJIN UNIV
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Problems solved by technology

[0004] Therefore, there is no complete method to evaluate the safety of

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  • Assessment method for leakage safety of mixed working medium in organic Rankine cycle system
  • Assessment method for leakage safety of mixed working medium in organic Rankine cycle system
  • Assessment method for leakage safety of mixed working medium in organic Rankine cycle system

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Embodiment Construction

[0028] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the described specific embodiments are only for explaining the present invention, and are not intended to limit the present invention.

[0029] The present invention proposes a method for evaluating the safety of mixed working fluid leakage in an organic Rankine cycle system, wherein the mixed working fluid involved includes combustible components and flame retardants, such as figure 1 As shown, the method includes the following steps:

[0030] Step 1. According to the temperature and pressure at the inlet and outlet of each component of the evaluation target organic Rankine cycle, set the source of leakage of the working fluid, and calculate the leakage rate of the working fluid of the source of the leakage of the working fluid;

[0031] The organic Rankine cycle system for waste heat recovery from a labor...

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Abstract

The invention discloses an assessment method for leakage safety of a mixed working medium in an organic Rankine cycle system. The method comprises the steps of firstly, building a working medium leakage simulation model; performing numerical simulation on spatial distribution after leakage of the working medium by utilizing Fluent software, and exploring a diffusion law after leakage of the mixed working medium; based on a numerical simulation result, marking out a region in which combustion and explosion occur possibly in combination with an explosion limit of the working medium; by applying a TNT equivalent method and an overpressure criterion, quantitatively assessing the damage/harm degree of an explosion accident to buildings and indoor personnel; and through further numerical simulation, exploring proper risk avoidance measures. According to the method, the leakage risk of the mixed working medium is assessed based on a system operation level in combination with a CFD technology, the TNT equivalent method and the explosion limit of the working medium, and based on this, targeted risk prevention measures are proposed, so that the security performance of the system is improved, the risk assessment is more comprehensive and specific, and an accurate reference basis is provided for assessing the safety of the working medium applied by a waste heat recovery and thermal cycle system.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery thermodynamic cycle, and in particular relates to a method for evaluating the leakage safety of an organic Rankine cycle mixed working medium. Background technique [0002] With the increasingly prominent problems of energy shortage and environmental pollution, carrying out energy conservation and emission reduction is an effective way to alleviate these two problems. The recycling technology of waste heat (such as internal combustion engine waste heat and industrial waste heat, etc.) is of great significance for reducing energy consumption and greenhouse gas emissions. Among them, organic Rankine cycle waste heat recovery is an effective way to save energy and reduce emissions, but if the temperature of the waste heat source is too high, it will lead to the decomposition of traditional organic working fluid. In the field of medium-high temperature waste heat utilization (such as exha...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/02G06F17/50
CPCG06F30/20G06Q10/0635G06Q50/02Y02P80/15
Inventor 田华王雪颖舒歌群赵明如何俊南
Owner TIANJIN UNIV
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