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Economic evaluation method of modification effects of heat supply technology of pure condensing steam turbine unit

An economic evaluation and steam turbine unit technology, which is applied in the field of economic evaluation, can solve the problems such as the inability to obtain the operating benefits of the heating unit or the pure condensing unit, and the inability to reflect the performance of the power plant or the heating unit.

Inactive Publication Date: 2014-07-23
STATE GRID CORP OF CHINA +2
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing index evaluation system of heating units or pure condensing units in China, the economic indicators of power generation or heating, such as heat consumption rate of power generation, coal consumption rate of power generation, coal consumption rate of heating, etc., only reflect the It is a local indicator of the power plant and cannot reflect the overall performance of the power plant or heating unit
Moreover, in the calculation of specific indicators, such as the heat consumption rate index of power generation, due to the existence of different distribution methods of total heat consumption, completely different calculation results may even be obtained. complete status of benefits
This makes it difficult to accurately judge the effect of technological transformation

Method used

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  • Economic evaluation method of modification effects of heat supply technology of pure condensing steam turbine unit
  • Economic evaluation method of modification effects of heat supply technology of pure condensing steam turbine unit
  • Economic evaluation method of modification effects of heat supply technology of pure condensing steam turbine unit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1 Determination of relative operation economic benefit formula

[0065] 1. Calculation of direct economic benefits of unit operation

[0066] Formula 1)

[0067] in, Indicates the operating economic benefits of the heating unit per unit time, unit yuan / h; , Indicates the income from external power supply and external heat supply, unit yuan / h; Indicates the fuel consumption cost of the heating unit per unit time, unit yuan / h.

[0068] For the heating unit or pure condensing unit of the power plant, in the scheme demonstration stage, the theoretical calculation method is adopted, as long as the relationship between the three main parameters of boiler fuel consumption, power generation, and external heat supply is determined, combined with the boundary price parameter ( Such as standard coal coal price, electricity price and heat price), the economic benefits of the operation of the heating unit of the power plant can be determined.

[0...

Embodiment 2

[0095] Example 2 Evaluate the effect of heat supply technical transformation of pure condensing turbine unit with 75% unit electric load

[0096] The #1 steam turbine in a power plant is ZK600-16.7 / 538 / 538 type, subcritical, one-time intermediate reheat, four-cylinder four-exhaust steam, direct air-condensing, designed and manufactured jointly by Beizhong Steam Turbine Motor Co., Ltd. and ALSTOM Power Generation Co., Ltd. Steam turbine, the flow part of the unit has a total of 73 stages, of which the high-pressure cylinder has 19 pressure stages, the medium-pressure cylinder has a total of 2×15 pressure stages, and the low-pressure cylinder consists of 2×2×6 pressure stages. The rated working condition output is 600MW, and the TMCR working condition output is 645MW. The starting mode of the steam turbine is the combined starting of high and medium pressure cylinders. The unit has a total of seven sections of non-adjusted regenerative steam extraction, which are respectively su...

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Abstract

The invention discloses an economic evaluation method of modification effects of a heat supply technology of a pure condensing steam turbine unit. The economic evaluation method comprises the steps that firstly, a certain specific electric operation load of a typical unit is selected; then, relative operation economic benefits generated when the heat supply working condition and the pure condensing working condition are compared under the condition that the steam turbine unit runs under the same electric load are used as main economic evaluation indexes for technical modification. When the relative operation economic benefits are calculated, changing of the technical indexes such as the power generation heat consumption rate is considered in the provided algorithm, and the influences of the boundary parameters such as the heat supply price and the standard coal price are also considered in the provided algorithm. The economic evaluation method can be implemented easily on site, the algorithm is scientific, and the economic evaluation method can provide effective support in determining the feasibility of modification of the heat supply technology at the modification project demonstration stage of the heat supply technology of the pure condensing steam turbine unit.

Description

technical field [0001] The invention relates to an economical evaluation method for the heat supply technical transformation effect of a pure condensing steam turbine unit. Background technique [0002] With the increasing pressure of national energy conservation and emission reduction, more and more power plants consider adopting combined heat and power technology to improve the technical indicators and economic benefits of power plants. With combined heat and power generation, the unit can provide users with two products of electricity and heat at the same time, but the two products are of different quality, which makes it impossible for the power plant to determine the effect of the transformation after the transformation of the heat supply technology of the pure condensing unit. Accurate evaluation. Especially when only the technical index of a certain product is used, such as the coal consumption rate index for power generation, it will obviously mislead the evaluation...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
Inventor 杨海生卢盛阳
Owner STATE GRID CORP OF CHINA
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