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Cyclic parameter design method for supercritical carbon dioxide power generation system

A carbon dioxide, power generation system technology, applied in electrical digital data processing, computer-aided design, design optimization/simulation, etc., can solve the problems of cycle parameter optimization results that are not very helpful, difficult to implement, and heavy computational workload, etc. To achieve the effect of fast and simple optimized design, simple and easy-to-use methods, and simple logic

Pending Publication Date: 2021-08-24
SHANGHAI MICROPOWERS
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Problems solved by technology

[0006] However, when these methods are used to calculate system cycle parameters, there are problems such as large computational workload and high difficulty in implementation.
And for a simple cycle including only one compressor and most application scenarios, considering too many factors does not help much in optimizing the cycle parameters

Method used

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  • Cyclic parameter design method for supercritical carbon dioxide power generation system

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Embodiment 1

[0035] Embodiment 1: A method for designing cycle parameters of a supercritical carbon dioxide power generation system.

[0036] Such as figure 1 As shown, this embodiment is used to determine the design value of the cycle parameters of the supercritical carbon dioxide power generation system. The power generation system adopts a simple Brayton cycle including a compressor, including the cycle maximum pressure design value Pmax, cycle maximum temperature design value Tmax , design value of cycle minimum pressure Pmin, cycle minimum temperature design value Tmin, the steps are as follows:

[0037] S10. First, according to the system design level and design strategy, taking into account the difficulty and cost of implementation, determine the upper limit of the maximum pressure PH, the upper limit of the maximum temperature TH, the lower limit of the minimum pressure PL and the lower limit of the minimum temperature TL. In this embodiment, a 5MW power level system is taken as a...

Embodiment 2

[0046] Embodiment 2: A method for designing cycle parameters of a supercritical carbon dioxide power generation system.

[0047] In this embodiment, different input parameters are used to further illustrate the specific implementation manner of the present application. The flow chart of the method for designing cycle parameters of the supercritical carbon dioxide power generation system in this embodiment is the same as that in Embodiment 1, and will not be described again. The calculation steps and calculation results of this embodiment are as follows:

[0048] S10. In this embodiment, the 10MW power level system is taken as an example, determined after evaluation according to the design level and implementation level above the middle level: PH=24Mpa, PL=7.8Mpa, TH=600°C, TL=33°C; the equipment performance is set as follows: compression The upper limit of machine efficiency = 88%, the upper limit of turbine efficiency = 92%, the minimum heat transfer temperature difference o...

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Abstract

The invention provides a cyclic parameter design method for a supercritical carbon dioxide power generation system. The method comprises the following steps: setting the maximum cycle design pressure Pmax and the maximum cycle design temperature Tmax as upper limit values PH and TH, and taking the maximum value of equipment performance; calculating a quasi-critical temperature Tcr corresponding to the lower limit PL of the cyclic minimum pressure value; then, temporarily setting the circulation minimum design pressure Pmin to be PL, and calculating the system circulation performance eta 1 and eta 2 according to set data when the circulation minimum design temperature Tmin is Tcr + 0.5 DEG C and Tcr-0. 5 DEG C respectively; if eta 1 > = eta 2, taking the following relations: Pmin = PL, max (Tcr, TL) < = Tmin < = max (Tcr + 3 DEG C, TL); if eta 1 < eta 2, taking the following relations: Tmin = TL, Pmin = Pcr + / -160kPa, wherein Pcr is the quasi-critical pressure corresponding to Tmin. The method is simple, easy to use and small in calculation amount.

Description

technical field [0001] The present application relates to the technical field of supercritical carbon dioxide power generation, in particular to a method for designing cycle parameters of a supercritical carbon dioxide power generation system. Background technique [0002] Supercritical carbon dioxide power generation technology is a closed Brayton cycle technology with supercritical carbon dioxide as the working medium. Compared with the traditional steam Rankine cycle, it has the advantages of high efficiency, small size, and wide range of heat sources. Emerging power generation technologies with great potential in the fields of nuclear power generation, solar power generation, geothermal power generation, fossil fuel power generation, waste heat utilization and ship power. [0003] A supercritical carbon dioxide power generation system generally includes at least a set of coaxial or split-shaft compressors and turbines, a regenerator, and a cooler. The supercritical carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28F01K25/10F01K7/32F01D15/10G06F113/08G06F119/08G06F119/14
CPCG06F30/28F01K25/103F01K7/32F01D15/10G06F2113/08G06F2119/08G06F2119/14
Inventor 李新宇林志民秦政刘惠民董克用杜柯江王锋虞翔宇
Owner SHANGHAI MICROPOWERS
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