Feasibility Evaluation Method and Device for Coupling Geothermal Energy in Gas Turbine Power Generation System

Abstract

The present invention discloses a method and device for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system. The evaluation method includes: obtaining basic data of regional geothermal resources and basic parameters of the gas turbine power generation system; inputting the basic data of regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system; the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system respectively outputs a first unit replacement coefficient and a second unit replacement coefficient; obtaining the larger value among the first unit replacement coefficient and the second unit replacement coefficient, matching the larger value with the evaluation suggestions in a preset evaluation suggestion table, and outputting the matching evaluation suggestions. The feasibility of the system coupling geothermal energy can be directly evaluated through the constructed unit replacement coefficient, providing a basis for the design optimization of the gas turbine power generation system, and can be popularized and applied in key development areas of geothermal resources.

Description

Technical Field

[0001] The present invention belongs to the technical field of geothermal energy utilization, and particularly relates to a method and device for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system. Background Art

[0002] Geothermal resources are a kind of clean and renewable energy with large reserves, high efficiency and good stability, which are of great significance for energy conservation, emission reduction, haze control and other aspects. Geothermal resources can be used in multiple fields such as power generation, heating, hot spring bathing, agricultural irrigation, etc. However, according to the characteristics of medium and low temperature geothermal resources in China, geothermal resources in China are mainly used for industrial / residential heating in the north, and typical geothermal heating models represented by the "Xiongxian Model" have also been popularized and applied in many regions of North China, achieving good social and economic benefits.

[0003] In some regions of southern China, geothermal resources are rich, but the overall heating demand in the south is relatively low, and the main way of using geothermal energy is geothermal power generation. Due to the too low efficiency of geothermal power generation, most power generation projects with geothermal energy as a single working medium have ended in failure. In recent years, some scholars have proposed a gas turbine power generation system coupled with geothermal energy, that is, in areas with good endowment conditions of geothermal resources, natural geothermal resources are used to replace part of the heat supply in the gas turbine power generation system, so as to reduce the unit energy supply cost of the system and improve the overall energy supply efficiency of the system. However, the uneven distribution of geological resources leads to different availability of geothermal resources in different regions, and the effects of coupling geothermal energy in gas turbine power generation systems with different parameters and designs are also inconsistent; the superposition of various uncertain factors such as resources and gas turbine parameters has caused the uncertainty of the feasibility of coupling geothermal energy in gas turbine power generation systems, making it difficult to utilize geothermal resources. Therefore, in order to scientifically and conveniently evaluate the feasibility of coupling geothermal energy in the system before the project is carried out, and avoid investment failures and wrong decisions of the project, it is necessary to form a method for efficiently evaluating the feasibility of coupling geothermal energy in a newly built gas turbine power generation system, so as to lay an important foundation for relevant investment and technical decisions. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and device for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system, so as to solve the problem in the prior art that when geothermal resources are coupled with a gas turbine power generation system for utilization, the superposition of various uncertain factors such as resources and gas turbine parameters causes the uncertainty of the feasibility of coupling geothermal energy in the gas turbine power generation system, making it difficult to utilize geothermal resources.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] In the first aspect of the present invention, a method for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system includes the following steps:

[0007] Obtain the basic data of regional geothermal resources;

[0008] Obtain the basic parameters of the gas turbine power generation system;

[0009] Input the basic data of the regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system; the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system outputs a first unit replacement coefficient and a second unit replacement coefficient respectively;

[0010] Obtain the larger value among the first unit replacement coefficient and the second unit replacement coefficient, match the larger value with the evaluation suggestions in the preset evaluation suggestion table, and output the matched evaluation suggestions.

[0011] Further, in the step of obtaining the basic data of the regional geothermal resources, the basic data includes: geothermal reservoir temperature T1, final return water temperature T0, geothermal heat exchange efficiency η 地热 , specific heat capacity C of water 水 and density ρ of water 水 .

[0012] Further, in the step of inputting the basic data of the regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system, the preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system includes:

[0013] Feasibility calculation models for the part replaced by the geothermal cycle being the gas cycle and the part replaced by the geothermal cycle being the steam cycle.

[0014] Further, the feasibility calculation model for the part replaced by the geothermal cycle being the gas cycle is as follows:

[0015]

[0016] where UR 地热-燃气 is the unit replacement coefficient when the part replaced by the geothermal cycle is the gas cycle; R 地热 is the heat supply per unit volume of geothermal water in the geothermal cycle; R 燃气 is the heat supply per unit volume in the gas cycle.

[0017] Further, the calculation method of the heat supply R 地热 per unit volume of geothermal water in the geothermal cycle is:

[0018] R 地热 = C 水 ·(T1 - T0)·ρ 水 ·η 地热

[0019] where C水 is the specific heat capacity of water; T1 is the geothermal reservoir temperature; T0 is the final return water temperature; ρ 水 is the density of water; η 地热 is the geothermal heat exchange efficiency.

[0020] Furthermore, the heat supply per unit volume R in the gas cycle 燃气 is calculated as follows:

[0021] R 燃气 = q·η 燃气

[0022] wherein, q is the weighted combustion calorific value of natural gas; η 燃气 is the heat exchange efficiency of the natural gas gas turbine.

[0023] Furthermore, the feasibility calculation model for the part replaced by the geothermal cycle in the steam cycle is as follows:

[0024]

[0025] wherein, UR 地热-蒸汽 is the unit replacement coefficient when the part replaced by the geothermal cycle is the steam cycle; R 地热 is the heat supply per unit volume of geothermal water in the geothermal cycle; R 蒸汽 is the heat supply per unit volume in the steam cycle.

[0026] Based on the same inventive concept as the first aspect, the second aspect of the present invention provides an evaluation device for the feasibility of coupling geothermal energy in a gas turbine power generation system, including:

[0027] The first acquisition module is used to acquire the basic data of regional geothermal resources;

[0028] The second acquisition module is used to acquire the basic parameters of the gas turbine power generation system;

[0029] The replacement coefficient calculation module is used to input the basic data of regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system; the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system respectively outputs a first unit replacement coefficient and a second unit replacement coefficient;

[0030] The comparison module is used to obtain the larger value among the first unit replacement coefficient and the second unit replacement coefficient, match the larger value with the evaluation suggestions in a preset evaluation suggestion table, and output the matched evaluation suggestions.

[0031] Based on the same inventive concept as the first aspect, the third aspect of the present invention provides an electronic device, including a processor and a memory. The processor is configured to execute a computer program stored in the memory to implement the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system as described above.

[0032] Based on the same inventive concept as the first aspect, the fourth aspect of the present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, it implements the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system as described above.

[0033] The beneficial effects of the present invention are as follows:

[0034] The evaluation method of the present invention obtains the basic data of regional geothermal resources and the basic parameters of the gas turbine power generation system; inputs the basic data of regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset calculation model for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system; the calculation model for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system respectively outputs a first unit replacement coefficient and a second unit replacement coefficient; obtains the larger value among the first unit replacement coefficient and the second unit replacement coefficient, matches the larger value with the evaluation suggestions in a preset evaluation suggestion table, and outputs the matching evaluation suggestions. The present invention first proposes a method for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system in China. By constructing the unit replacement coefficient UR, it directly evaluates the feasibility of the system coupling geothermal energy, provides a basis for the design optimization of the gas turbine power generation system, and can be popularized and applied in key geothermal resource development areas. Description of the Drawings

[0035] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0036] Figure 1 It is a schematic flow chart of the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system of the present invention.

[0037] Figure 2 It is a schematic principle diagram of the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system of the present invention.

[0038] Figure 3 It is a structural block diagram of a device for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system of the present invention.

[0039] Figure 4 It is a structural block diagram of an electronic device of the present invention. Detailed Embodiments

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0041] The following detailed descriptions are all exemplary descriptions, aiming to provide further detailed descriptions of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

[0042] Embodiment 1

[0043] A method for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system. First, it is necessary to collect and obtain the basic parameters of regional geothermal resources, and based on the design scheme of the gas turbine power generation system, obtain the basic parameters of the gas turbine power generation system; based on the collected data, construct a calculation model for the feasibility of coupling geothermal energy in the gas turbine power generation system, determine and calculate the feasibility evaluation parameters; finally, according to the calculated feasibility evaluation parameters, evaluate the feasibility of coupling geothermal energy in the gas turbine power generation system.

[0044] As Figure 1 and 2 shown, a method for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system includes the following steps:

[0045] S1. Obtain the basic data of regional geothermal resources.

[0046] It should be noted that obtaining sufficient and effective basic data of geothermal resources is an important prerequisite for carrying out the feasibility evaluation of coupling geothermal energy. Based on the parameters required for the feasibility evaluation, according to the regional geological survey and geothermal drilling conditions, the basic data of geothermal resources at different locations and drillings within the regional scope should be collected in advance. The basic data includes but is not limited to:

[0047] Regional geothermal reservoir temperature T1 (°C), final return water temperature T0 (°C), geothermal heat exchange efficiency η 地热 , specific heat capacity C 水 (J / kg·°C) and density ρ 水 (kg / m 3 ) and the well location coordinates of each data.

[0048] S2. Obtain the basic parameters of the gas turbine power generation system.

[0049] Specifically, in this step, based on the design scheme of the gas turbine power generation system, obtain the natural gas component table and the combustion calorific value of each gas component used in the gas turbine, and further calculate the weighted combustion calorific value q (J / m 3 ). The calculation formula is:

[0050]

[0051] In the formula, n is the total number of components in natural gas, X i is the molar fraction of the i-th component, and q i is the corresponding calorific value of the i-th component. At the same time, based on the design document, the heat exchange efficiency η 燃气 of the natural gas gas turbine, the heat exchange efficiency η 蒸汽 of the steam turbine, and the thermoelectric conversion efficiency η 热电 and other relevant parameters are obtained.

[0052] S3. Input the basic data of the regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system; the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system outputs a first unit replacement coefficient and a second unit replacement coefficient respectively.

[0053] In this step, the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system is divided into: a feasibility calculation model where the part replaced by the geothermal cycle is the gas cycle, and a feasibility calculation model where the part replaced by the geothermal cycle is the steam cycle.

[0054] Specifically, the process of constructing the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system in this step is as follows:

[0055] Based on the gas turbine power generation system, clarify the heat supply part in the system that can be coupled with geothermal energy. If the part coupled with geothermal energy is the gas power generation part, the heat that can be replaced is the geothermal cycle and the gas cycle; if the part coupled with geothermal energy is the steam power generation part, the heat that can be replaced is the geothermal cycle and the steam cycle.

[0056] Define the unit replacement coefficient UR as a feasibility evaluation parameter, and the calculation formula is:

[0057]

[0058] where R 地热 represents the heat supply per unit volume of geothermal water in the geothermal cycle, with the unit of J / m 3 ; R 燃机 represents the heat supply per unit volume of gas in the gas turbine cycle, with the unit of J / m 3 . If the heat in the gas turbine cycle is provided by the gas cycle, then R 燃机 takes R 燃气 ; if the heat in the gas turbine cycle is provided by the steam cycle, then R 燃机 takes R 蒸汽 .

[0059] The heat supply per unit volume of geothermal water in the geothermal cycle is:

[0060] R地热 = C 水 ·(T1 - T0)·ρ 水 ·η 地热 (3)

[0061] Among them, C 水 is the specific heat capacity of water; T1 is the geothermal reservoir temperature; T0 is the final return water temperature; ρ 水 is the density of water; η 地热 is the geothermal heat exchange efficiency.

[0062] The heat supply per unit volume in the gas cycle is:

[0063] R 燃气 = q·η 燃气 (4)

[0064] The heat supply per unit volume in the steam cycle is:

[0065] R 蒸汽 = q·η 燃气 ·η 蒸汽 (5)

[0066] Among them, q is the weighted combustion calorific value of natural gas; η 燃气 is the heat exchange efficiency of the natural gas gas turbine.

[0067] Combined with the collected data, using formulas (2) - (5), calculate the geothermal heating capacity R 地热 , the gas heating capacity R 燃气 and the steam heating capacity R 蒸汽 respectively.

[0068] If the part replaced by the geothermal cycle is the gas cycle, the unit replacement coefficient UR can be expressed as:

[0069]

[0070] Among them, UR 地热-燃气 is the unit replacement coefficient when the part replaced by the geothermal cycle is the gas cycle; R 地热 is the heat supply per unit volume of geothermal water in the geothermal cycle; R 燃气 is the heat supply per unit volume in the gas cycle.

[0071] If the part replaced by the geothermal cycle is the steam cycle, the unit replacement coefficient UR can be expressed as:

[0072]

[0073] Among them, UR 地热-蒸汽 is the unit replacement coefficient when the part replaced by the geothermal cycle is the steam cycle; R 地热 is the heat supply per unit volume of geothermal water in the geothermal cycle; R蒸汽 The heat supply per unit volume in the steam cycle.

[0074] S4. Obtain the larger value among the first unit replacement coefficient and the second unit replacement coefficient, match the larger value with the evaluation suggestions in the preset evaluation suggestion table, and output the matched evaluation suggestions.

[0075] For example, the first unit replacement coefficient can be the replacement coefficient when the part replaced by the geothermal cycle is replaced by the gas cycle, and the second unit replacement coefficient is the replacement coefficient when the part replaced by the geothermal cycle is replaced by the steam cycle; or the second unit replacement coefficient can be the replacement coefficient when the part replaced by the geothermal cycle is replaced by the gas cycle, and the first unit replacement coefficient is the replacement coefficient when the part replaced by the geothermal cycle is replaced by the steam cycle.

[0076] Calculate the unit replacement coefficient UR of the geothermal-gas turbine according to formulas (6)-(7) to evaluate the feasibility of coupling geothermal energy in the gas turbine power generation system.

[0077] In the evaluation suggestion table involved in this step, different feasibility suggestions are preset corresponding to different values of the replacement coefficient. For example:

[0078] If the unit replacement coefficient UR > 4, then give the suggestion: In this gas turbine system, coupling geothermal energy has good feasibility;

[0079] If the unit replacement coefficient UR < 2, then give the suggestion: In this gas turbine system, the feasibility of coupling geothermal energy is not high;

[0080] If the unit replacement coefficient 2 ≤ UR ≤ 4, then give the suggestion: In this gas turbine system, coupling geothermal energy has certain feasibility, but the actual coupling method needs to be further explored.

[0081] In order to enable ordinary technicians in the field to have a deeper understanding of the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system of the present invention, the following will take the gas turbine power generation system in Area A as an example, with reference to Figure 1 and 2 , and further introduce in detail a method for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system of the present invention.

[0082] Step 1. Collect and obtain the basic parameters of the regional geothermal resources;

[0083] Based on the parameters required for the feasibility evaluation, according to the regional geological survey and geothermal drilling conditions, the basic data of the geothermal resources at different locations and drillings within the regional scope should be collected in advance. The basic data includes but is not limited to the buried depth d (m) of the regional geothermal reservoir, the geothermal reservoir temperature T1 (°C), the final return water temperature T0 (°C), and the geothermal water / steam output Q (m 3 / h), the ratio of water output to steam output r, and the geothermal heat exchange efficiency η 地热 and the specific heat capacity C of water 水 (J / kg·℃) and density ρ 水 (kg / m 3 ) and the well location coordinates of each data item.

[0084] According to the geothermal resource survey in Area A, the following basic parameters of the local geothermal resources are collected:

[0085] Geothermal parameters Symbol (unit) Value Burial depth of geothermal reservoir d (m) 400-1000 Geothermal reservoir temperature <![CDATA[T1(℃)]]> 60 Final return water temperature <![CDATA[T0 (°C)]]> 30 Geothermal water / steam output <![CDATA[Q(m 3 / h)]]> 100 Ratio of water / steam output r 100% (water) Geothermal heat exchange efficiency <![CDATA[η 地热 > 95％ Specific heat capacity of water <![CDATA[C 水 (J / kg·℃)]]> 4200 Density of water <![CDATA[ρ 水 (kg / m 3 )]]> 1000

[0086] Step 2: Obtain the basic parameters of the gas turbine power generation system;

[0087] Based on the design scheme of the gas turbine power generation system, the following natural gas component table used in the gas turbine is obtained.

[0088] Component Mole ratio (Mol%) <![CDATA[CH4]]> 92.5469 <![CDATA[C2H6]]> 3.9582 <![CDATA[C3H8]]> 0.3353 <![CDATA[i-C4H 10 > 0.1158 <![CDATA[n-C4H 10 > 0.0863 <![CDATA[i-C5H 12 > 0.221 <![CDATA[CO2]]> 1.8909 <![CDATA[N2]]> 0.8455 <![CDATA[H2S]]> 0.0001

[0089] Consult the lower calorific value of combustion (20℃, 101.325 kPa) of each component, and further calculate the lower calorific value q of natural gas in this system using formula (1) to be q = 34.113 MJ / Nm 3 .

[0090] At the same time, based on the design document of the gas turbine power generation system in Area A, obtain the heat exchange efficiency η 燃气 of the natural gas gas turbine and the heat exchange efficiency η 蒸汽 of the steam turbine and other relevant parameters as follows.

[0091] Gas turbine parameters Symbol (unit) Value Heat exchange efficiency of gas turbine - 90％ Heat exchange efficiency of steam turbine - 80％

[0092] Step 3: Build a calculation model for the feasibility of coupling geothermal energy in the gas turbine power generation system and determine the feasibility evaluation parameters;

[0093] Based on the gas turbine power generation system in Area A, clarify the heat supply part in the system that can be coupled with geothermal energy. Considering the actual situation of the above gas turbine power generation system, the geothermal cycle can be coupled with the gas cycle for heat replacement, or it can be coupled with the steam cycle for heat replacement.

[0094] If the geothermal cycle and the gas cycle are used for heat replacement, according to formula (6), the unit replacement coefficient UR of coupling geothermal energy in the gas turbine of this gas turbine power generation system can be expressed as:

[0095]

[0096] If the geothermal cycle and the steam cycle are used for heat replacement, according to formula (7), the unit replacement coefficient UR of coupling geothermal energy in the steam turbine of this gas turbine power generation system can be calculated.

[0097]

[0098] Step 4: Calculate the feasibility evaluation parameters based on the existing parameters;

[0099] Combined with the collected data, use formulas (2)-(5) to calculate the geothermal heating capacity R 地热 , gas heating capacity R 燃气 and steam heating capacity R 蒸汽 .

[0100] If heat replacement is carried out between the geothermal cycle and the gas cycle, according to formula (6), the unit replacement coefficient UR of the gas turbine coupled with geothermal energy in this gas turbine power generation system can be expressed as:

[0101]

[0102] If heat replacement is carried out between the geothermal cycle and the steam cycle, according to formula (7), the unit replacement coefficient UR of the steam turbine coupled with geothermal energy in this gas turbine power generation system can be calculated.

[0103]

[0104] Step 5: Evaluate the feasibility of coupling geothermal energy in the gas turbine power generation system according to the calculated feasibility evaluation parameters.

[0105] Combined with the unit replacement coefficient UR of geothermal-gas turbine calculated by formulas (8)-(9), evaluate the feasibility of coupling geothermal energy in the gas turbine power generation system. According to the calculation, if the gas cycle in the gas turbine power generation system is coupled with geothermal energy, its UR 地热-燃气 = 3.899, which is between 2 and 4, indicating that there is a certain feasibility in coupling geothermal energy in the gas cycle of this gas turbine system, but the actual coupling method needs further research; if the steam cycle in the gas turbine power generation system is coupled with geothermal energy, its UR 地热-蒸汽 = 4.874 > 4, indicating that the feasibility of coupling geothermal energy in the steam cycle of this gas turbine system is relatively high, and the basic technical conditions for constructing a geothermal coupling system are available.

[0106] Those skilled in the art should understand that the accurate acquisition of various parameters of geothermal resources and gas turbine power generation systems is an important prerequisite for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system, and the accuracy and richness of actual drilling and geological survey data can affect the accuracy of feasibility evaluation parameters. Therefore, in order to ensure that the calculation results of this method can effectively guide the transformation of local gas turbine power generation systems, it is necessary to carry out sufficient geothermal geological exploration surveys before feasibility evaluation, so that the obtained feasibility evaluation parameters have a higher credibility.

[0107] The evaluation method proposed by the present invention can directly calculate the unit replacement coefficient UR based on the local geothermal resource situation and the preliminary design of the gas turbine power generation system, and directly evaluate the feasibility of coupling geothermal energy in the system based on the UR coefficient, providing a basis for the design optimization of the gas turbine power generation system.

[0108] Embodiment 2

[0109] As Figure 3 shown, an evaluation device for the feasibility of coupling geothermal energy in a gas turbine power generation system includes:

[0110] The first acquisition module is used to acquire the basic data of the regional geothermal resources;

[0111] The second acquisition module is used to acquire the basic parameters of the gas turbine power generation system;

[0112] The replacement coefficient calculation module is used to input the basic data of the regional geothermal resources and the basic parameters of the gas turbine power generation system into a pre-set calculation model for the feasibility of coupling geothermal energy in the gas turbine power generation system; the calculation model for the feasibility of coupling geothermal energy in the gas turbine power generation system outputs a first unit replacement coefficient and a second unit replacement coefficient respectively;

[0113] The comparison module is used to obtain the larger value of the first unit replacement coefficient and the second unit replacement coefficient, match the larger value with the evaluation suggestions in a pre-set evaluation suggestion table, and output the matching evaluation suggestions.

[0114] In the replacement coefficient calculation module, the pre-set calculation model for the feasibility of coupling geothermal energy in the gas turbine power generation system includes: a calculation model for the feasibility that the part replaced by the geothermal cycle is the gas cycle, and a calculation model for the feasibility that the part replaced by the geothermal cycle is the steam cycle.

[0115] The calculation model for the feasibility that the part replaced by the geothermal cycle is the gas cycle is as follows:

[0116]

[0117] Wherein, UR 地热-燃气 is the unit replacement coefficient when the part replaced by the geothermal cycle is the gas cycle; R 地热 is the heat supply per unit volume of geothermal water in the geothermal cycle; R 燃气 is the heat supply per unit volume in the gas cycle.

[0118] The calculation method of the heat supply R 地热 per unit volume of geothermal water in the geothermal cycle is:

[0119] R 地热 = C 水 ·(T1 - T0)·ρ 水 ·η 地热

[0120] Among them, C 水 is the specific heat capacity of water; T1 is the geothermal reservoir temperature; T0 is the final return water temperature; ρ 水 is the density of water; η 地热 is the geothermal heat exchange efficiency.

[0121] The heat supply per unit volume R 燃气 in the gas cycle is calculated as follows:

[0122] R 燃气 = q·η 燃气

[0123] Among them, q is the weighted combustion calorific value of natural gas; η 燃气 is the heat exchange efficiency of the natural gas gas turbine.

[0124] The feasibility calculation model for the part replaced by the geothermal cycle in the steam cycle is as follows:

[0125]

[0126] Among them, UR 地热-蒸汽 is the unit replacement coefficient when the part replaced by the geothermal cycle is the steam cycle; R 地热 is the heat supply per unit volume of geothermal water in the geothermal cycle; R 蒸汽 is the heat supply per unit volume in the steam cycle.

[0127] Example 3

[0128] Such as Figure 4As shown in the figure, the present invention also provides an electronic device 100 for implementing the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system of Embodiment 1; the electronic device 100 includes a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and executable on the at least one processor 102, and at least one communication bus 104. The memory 101 can be used to store the computer program 103. The processor 102 realizes the steps of the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system of Embodiment 1 by running or executing the computer program stored in the memory 101 and calling the data stored in the memory 101. The memory 101 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the electronic device 100 (such as audio data), etc. In addition, the memory 101 may include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. The at least one processor 102 may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 102 may be a microprocessor or the processor 102 may also be any conventional processor, etc. The processor 102 is the control center of the electronic device 100 and connects various parts of the entire electronic device 100 through various interfaces and lines. The memory 101 in the electronic device 100 stores multiple instructions to implement a method for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system, and the processor 102 can execute the multiple instructions to implement:

[0129] Obtain the basic data of regional geothermal resources;

[0130] Obtain the basic parameters of the gas turbine power generation system;

[0131] Input the basic data of the regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system; the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system outputs a first unit replacement coefficient and a second unit replacement coefficient respectively;

[0132] Obtain the larger value among the first unit replacement coefficient and the second unit replacement coefficient, match the larger value with the evaluation suggestions in a preset evaluation suggestion table, and output the matched evaluation suggestions.

[0133] Embodiment 4

[0134] If the modules / units integrated in the electronic device 100 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above method embodiments of the present invention, it can also be completed by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, and read-only memory (ROM, Read-Only Memory).

[0135] Those skilled in the art should understand that the embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0136] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of processes and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate for implementing in the process Figure 1 one process or multiple processes and / or blocks Figure 1means for the functions specified in one or more boxes.

[0137] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to work in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including an instruction means that implements the functions specified in one Figure 1 flow or more flows and / or boxes Figure 1 means for the functions specified in one or more boxes.

[0138] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus, such that a series of operational steps are performed on the computer or other programmable apparatus to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one Figure 1 flow or more flows and / or boxes Figure 1 means for the functions specified in one or more boxes.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A method for evaluating the feasibility of coupling geothermal energy in a gas turbine power generation system, characterized in that, It includes the following steps: Obtain the basic data of regional geothermal resources; Obtain the basic parameters of the gas turbine power generation system; Input the basic data of the regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system; the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system outputs a first unit replacement coefficient and a second unit replacement coefficient respectively; Obtain the larger value among the first unit replacement coefficient and the second unit replacement coefficient, match the larger value with the evaluation suggestions in a preset evaluation suggestion table, and output the matching evaluation suggestions; In the step of inputting the basic data of the regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system, the preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system includes: A feasibility calculation model for the part replaced by the geothermal cycle being the gas cycle, and a feasibility calculation model for the part replaced by the geothermal cycle being the steam cycle; The feasibility calculation model for the part replaced by the geothermal cycle being the gas cycle is as follows: Among them, is the unit replacement coefficient when the part replaced by the geothermal cycle is the gas cycle; is the heat supply per unit volume of geothermal water in the geothermal cycle; is the heat supply per unit volume in the gas cycle; The feasibility calculation model for the part replaced by the geothermal cycle being the steam cycle is as follows: wherein, is the unit replacement coefficient when the replaced part of the geothermal cycle is the steam cycle; is the heat supply per unit volume of geothermal water in the geothermal cycle; is the heat supply per unit volume in the steam cycle.

2. The method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system according to claim 1, wherein The heat supply per unit volume of geothermal water in the geothermal cycle The calculation method is as follows: Among them, C 水 is the specific heat capacity of water; T 1 is the geothermal reservoir temperature; T 0 is the final return water temperature; ρ 水 is the density of water; η 地热 is the geothermal heat exchange efficiency.

3. The method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system according to claim 1, wherein, Heat supply per unit volume in the gas cycle is calculated as follows: Among them, q is the weighted calorific value of natural gas combustion; is the heat exchange efficiency of the natural gas gas turbine.

4. An evaluation device for the feasibility of coupling geothermal energy in a gas turbine power generation system, which is used to implement the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system described in any one of claims 1 to 3, characterized in that, It includes: A first acquisition module for obtaining the basic data of regional geothermal resources; A second acquisition module for obtaining the basic parameters of the gas turbine power generation system; A replacement coefficient calculation module for inputting the basic data of the regional geothermal resources and the basic parameters of the gas turbine power generation system into a preset feasibility calculation model for coupling geothermal energy in the gas turbine power generation system; the feasibility calculation model for coupling geothermal energy in the gas turbine power generation system outputs a first unit replacement coefficient and a second unit replacement coefficient respectively; A comparison module for obtaining the larger value among the first unit replacement coefficient and the second unit replacement coefficient, matching the larger value with the evaluation suggestions in a preset evaluation suggestion table, and outputting the matching evaluation suggestions.

5. An electronic device, characterized in that, It includes a processor and a memory. The processor is used to execute the computer program stored in the memory to implement the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by the processor, it implements the method for evaluating the feasibility of coupling geothermal energy in the gas turbine power generation system as described in any one of claims 1 to 3.

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