CN112948768A - Energy efficiency detection method and system of energy conversion system based on secondary energy equalization - Google Patents
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Abstract
The invention discloses an energy efficiency detection method and system of an energy conversion system based on secondary energy equivalence, which are used for collecting energy input quantity and energy output quantity of the energy conversion system, establishing a comprehensive energy efficiency detection model of the energy conversion system based on secondary energy equivalence conversion, obtaining system operation conversion efficiency and design conversion efficiency, realizing quantitative calculation of energy efficiency of real operation working conditions of the system, and solving the problems that the absolute size of actual efficiency of the system cannot be compared and nominal conversion efficiency is possibly more than 1 due to different system principles and equipment; meanwhile, energy efficiency control decoupling of an operation link and a design link is realized, and a foundation is provided for further carrying out system energy efficiency optimization.
Description
Technical Field
The invention relates to the technical field of comprehensive energy efficiency detection, in particular to an energy conversion system energy efficiency detection method and system based on secondary energy equalization.
Background
With the development and the improvement of the technical level of the economic society, the energy demand of the user side is more and more diversified, the energy conversion equipment such as distributed clean energy, a heat pump and triple co-generation of the user side is continuously popularized, and the diversified comprehensive supply of various energy sources such as electricity, heat, cold and gas is the main development direction of the energy industry. The energy conversion system is the most core part of a comprehensive supply system of various energy sources, and the energy efficiency level in the energy conversion process is an important link influencing the overall energy efficiency.
The traditional conversion efficiency calculation is calculated according to the ratio of the total output energy to the total input energy, and different energy sources are converted by adopting an equivalent value conversion method, however, the difference of the design values of the conversion efficiency of the energy conversion systems with different principles is large, and the conversion efficiency of the secondary energy sources with different tastes calculated according to the equivalent value conversion is not reasonable. Therefore, it is necessary to establish a method and a system for detecting comprehensive energy efficiency of an energy conversion system, quantitatively analyze the comprehensive energy efficiency level of the system from a design level and an operation level, promote energy efficiency of an energy comprehensive supply system, and realize energy conservation and emission reduction in the whole society.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an energy conversion system energy efficiency detection method and system based on secondary energy equivalence, the energy input quantity and the energy output quantity of the energy conversion system are collected, a comprehensive energy efficiency detection model of the energy conversion system is established based on secondary energy equivalence conversion, the real energy efficiency of the energy conversion system under different operation conditions is reflected, the energy efficiency control decoupling of system design and system operation is realized, and basic data is provided for the subsequent energy efficiency optimization.
The invention adopts the following technical scheme.
The energy efficiency detection method of the energy conversion system based on the secondary energy equalization comprises the following steps:
step 2, calculating the nominal conversion efficiency of the energy conversion system according to the collected primary energy input quantity, secondary energy input quantity and secondary energy output quantity;
step 3, carrying out equalization treatment on the collected secondary energy output quantity to obtain primary energy consumption, and carrying out equalization treatment on the clean energy generated energy in the collected primary energy output quantity to obtain traditional energy generated energy;
and 4, calculating the operation conversion efficiency and the system design conversion efficiency of the system, and detecting the comprehensive energy efficiency of the energy conversion system in the current sampling period.
Preferably, in step 1,
the primary energy input includes: clean energy generated energy and traditional energy generated energy;
the input amount of the secondary energy comprises: external input power supply, external input heat supply and external input cold supply;
the secondary energy output includes: and outputting the power supply amount, the heat supply amount and the cooling amount outwards.
Preferably, in step 2, the nominal conversion efficiency satisfies the following relation:
in the formula (I), the compound is shown in the specification,
Upe，inrepresents the primary energy consumption in the energy conversion system, namely the primary energy input,
Use，inrepresents the primary energy consumption after the input quantity of the secondary energy in the energy conversion system is equalized,
Ucv，outrepresenting the secondary energy output of the energy conversion system.
The primary energy consumption after the input quantity of the secondary energy is equalized satisfies the following relational expression:
Use，in＝ce，coalEe，in+ch，inQh，in+cc，inQc，in
in the formula (I), the compound is shown in the specification,
ce，coalan equivalence coefficient, namely a power conversion standard coal consumption coefficient, which represents the primary energy consumption corresponding to the external input power supply quantity is determined according to the standard coal consumption level of thermal power generation in the current year,
ch，inan equating coefficient representing the primary energy consumption corresponding to the external input heat supply,
cc，inan equating coefficient representing the primary energy consumption corresponding to the external input cooling capacity,
Ee，inindicating the amount of externally input power supply during the sampling period,
Qh，inindicating the amount of externally input heat supply during the sampling period,
Qc，inindicating the amount of externally input cooling during the sampling period.
The external input heat supply amount corresponds to the equivalent coefficient of the primary energy consumption amount, and the equivalent coefficient meets the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，hprimary energy source representing an external heating systemThe total amount of the consumption is reduced,
Ee，hrepresents the total amount of power consumption of the external heating system,
Qh，hrepresenting the total amount of heat supplied by the external heating system.
The external input cooling capacity corresponds to the equivalent coefficient of the primary energy consumption and meets the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，crepresents the total primary energy consumption of the external cooling system,
Ee，crepresents the total amount of power consumption of the external cooling system,
Qc，cindicating the total amount of cooling of the external cooling system.
Preferably, step 3 comprises:
step 3.1, carrying out equalization treatment on the collected secondary energy output quantity, namely converting the secondary energy output quantity into primary energy consumption, and satisfying the following relational expression:
Uev，out＝ce，coalEe，out+ch，outQh，out+cc，outQc，out
in the formula (I), the compound is shown in the specification,
ce，coalan equivalence coefficient, namely a power conversion standard coal consumption coefficient, which represents the primary energy consumption corresponding to the external input power supply quantity is determined according to the standard coal consumption level of thermal power generation in the current year,
ch，outan equating coefficient representing the heat supply quantity corresponding to the primary energy consumption quantity output outwards,
cc，outan equivalence coefficient representing the quantity of externally output cooling corresponding to the consumption of primary energy,
Ee，outindicating the amount of outgoing power supply during the sampling period,
Qh，outindicating the amount of heat supplied to the external output during the sampling period,
Qc，outshowing the amount of cooling delivered to the outside during the sampling period;
step 3.2, carrying out equalization processing on the collected primary energy input quantity, namely converting the clean energy generating capacity in the primary energy input quantity into the traditional energy generating capacity in an equivalent manner, and satisfying the following relational expression:
Uere，t＝ce，coalEere
in the formula (I), the compound is shown in the specification,
Eererepresenting the clean energy generation during the sampling period.
In step 3.1, the process is carried out,
the equivalence coefficient of the single heat supply system taking electricity as energy, which outputs heat supply amount corresponding to primary energy consumption, meets the following relational expression:
in the formula (I), the compound is shown in the specification,
EERh，erepresenting the system heating energy efficiency ratio;
the equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity of a single heat supply system taking electricity as energy satisfies the following relational expression:
in the formula (I), the compound is shown in the specification,
EERc，eand the system refrigeration energy efficiency ratio is shown.
In step 3.1, the process is carried out,
the single heating system driven by the conventional energy sources outputs the equivalent coefficient of the heating load corresponding to the primary energy consumption amount to the outside, and the equivalent coefficient meets the following relational expression:
in the formula (I), the compound is shown in the specification,
αh，coalthe coefficient of the thermal signature coal is represented,
ηhrepresents the rated thermal efficiency of the system;
the equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity of a single cooling system driven by the conventional energy meets the following relational expression:
in the formula (I), the compound is shown in the specification,
αc，coalthe coefficient of the cold-power signature coal is represented,
ηcindicating the rated cooling efficiency of the system.
In step 3.1, the process is carried out,
the heat supply system is composed of a plurality of heat supply devices, and the equivalence coefficient of the heat supply quantity corresponding to the primary energy consumption quantity which is output outwards meets the following relational expression:
in the formula (I), the compound is shown in the specification,
the plurality of cooling devices form a cooling system, and the equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity meets the following relational expression:
in the formula (I), the compound is shown in the specification,
Preferably, step 4 comprises:
step 4.1, calculating the operation conversion efficiency of the system according to the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，inrepresents the primary energy consumption in the energy conversion system, namely the primary energy input,
Use，inrepresents the primary energy consumption after the input quantity of the secondary energy in the energy conversion system is equalized,
Uere，tthe acquired primary energy input quantity is subjected to equalization processing, namely the clean energy generating capacity in the primary energy input quantity is converted into the traditional energy generating capacity through equivalence,
Uev，outthe acquired secondary energy output quantity is subjected to equalization treatment, namely the secondary energy output quantity is converted into primary energy consumption;
step 4.2, calculating the system design conversion efficiency according to the following relational expression:
in the formula (I), the compound is shown in the specification,
ηtrepresenting a nominal conversion efficiency;
and 4.3, detecting the comprehensive energy efficiency of the energy conversion system in the current sampling period based on the system operation conversion efficiency and the system design conversion efficiency, wherein the comprehensive energy efficiency is calculated as follows:
the energy conversion system energy efficiency detection system based on secondary energy equalization comprises an energy data acquisition module, an energy data processing module and a comprehensive energy efficiency detection module;
the energy data acquisition module is used for acquiring the primary energy input quantity, the secondary energy input quantity and the secondary energy output quantity of the energy conversion system;
the energy data processing module is used for carrying out equivalence processing on the acquired primary energy input quantity, the acquired secondary energy input quantity and the acquired secondary energy output quantity;
and the comprehensive energy efficiency detection module is used for calculating the system operation conversion efficiency and the system design conversion efficiency according to the acquired data and the data after the equating processing, and giving a comprehensive energy efficiency detection result of the energy conversion system.
Compared with the prior art, the invention has the beneficial effects that:
1. the system operation conversion efficiency index is obtained based on secondary energy equivalent processing, quantitative calculation of the energy efficiency of the system under the real operation condition is achieved, and the problems that the absolute size of the actual efficiency of the system cannot be compared and the nominal conversion efficiency is possibly more than 100% due to the fact that the system principle and equipment are different are solved.
2. The comprehensive energy efficiency of the system is embodied in the energy efficiency of the operation link and the energy efficiency of the design link, the operation conversion efficiency and the design conversion efficiency index provided by the invention realize the energy efficiency control decoupling of the operation link and the design link, and provide a basis for further carrying out the energy efficiency optimization of the system.
Drawings
FIG. 1 is a flow chart of a method for detecting energy efficiency of an energy conversion system based on secondary energy equalization according to the present invention;
FIG. 2 is a general energy flow diagram of an energy conversion system to which the energy efficiency detection method of the energy conversion system based on secondary energy equalization of the present invention is applied;
fig. 3 is a schematic diagram of an energy efficiency detection system of an energy conversion system based on secondary energy equalization according to the present invention.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Referring to fig. 1, the energy conversion system energy efficiency detection method based on secondary energy equalization includes the following steps:
In particular, the amount of the solvent to be used,
in the step 1, the process is carried out,
the primary energy input includes: clean energy generated energy and traditional energy generated energy;
the input amount of the secondary energy comprises: external input power supply, external input heat supply and external input cold supply;
the secondary energy output includes: and outputting the power supply amount, the heat supply amount and the cooling amount outwards.
According to the general energy flow diagram of the energy conversion system shown in fig. 2, in the preferred embodiment, the energy conversion system of a certain region is taken as a research object, and the energy conversion system includes: primary energy input, secondary energy input, and secondary energy output.
The primary energy input quantity comprises natural gas supply quantity and clean energy generating capacity; the input quantity of the secondary energy is the external input power supply quantity; the secondary energy output includes: and outputting the heat supply quantity and the cold supply quantity outwards, wherein the equipment for outputting heat supply outwards comprises a ground source heat pump and a gas boiler, and the equipment for outputting cold supply outwards is the ground source heat pump. Specific data of the energy input amount of the energy conversion system are shown in tables 2 and 3, respectively.
TABLE 2 energy input data of energy conversion system in sampling period
TABLE 3 System energy output data over statistical period
In practical application, the energy quantities in the tables 2 and 3 need to be uniformly converted into standard coal equivalent.
And 2, calculating the nominal conversion efficiency of the energy conversion system according to the collected primary energy input quantity, secondary energy input quantity and secondary energy output quantity.
In particular, the amount of the solvent to be used,
in step 2, the nominal conversion efficiency satisfies the following relation:
in the formula (I), the compound is shown in the specification,
Upe，inrepresents the primary energy consumption in the energy conversion system, namely the primary energy input,
Use，inrepresents the primary energy consumption after the input quantity of the secondary energy in the energy conversion system is equalized,
Ucv，outrepresenting the secondary energy output of the energy conversion system.
In particular, the amount of the solvent to be used,
the primary energy consumption after the input quantity of the secondary energy is equalized satisfies the following relational expression:
Use，in＝ce，coalEe，in+ch，inQh，in+cc，inQc，in
in the formula (I), the compound is shown in the specification,
ce，coalan equivalence coefficient, namely a power conversion standard coal consumption coefficient, which represents the primary energy consumption corresponding to the external input power supply quantity is determined according to the standard coal consumption level of thermal power generation in the current year,
ch，inan equating coefficient representing the primary energy consumption corresponding to the external input heat supply,
cc，inan equating coefficient representing the primary energy consumption corresponding to the external input cooling capacity,
Ee，inindicating the amount of externally input power supply during the sampling period,
Qh，inindicating the amount of externally input heat supply during the sampling period,
Qc，inindicating the amount of externally input cooling during the sampling period.
In particular, the amount of the solvent to be used,
the equivalent coefficient of the primary energy consumption of the external input heat supply meets the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，hrepresenting the total amount of primary energy consumption of the external heating system,
Ee，hrepresents the total amount of power consumption of the external heating system,
Qh，hrepresenting the total amount of heat supplied by the external heating system.
In particular, the amount of the solvent to be used,
the equivalent coefficient of the primary energy consumption of the external input cooling capacity satisfies the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，cindicating primary energy of external cooling systemThe total amount of the source consumption is,
Ee，crepresents the total amount of power consumed by the external cooling system,
Qc，cindicating the total amount of cooling of the external cooling system.
In the preferred embodiment, the primary energy is input into the energy supply Upe，inNamely converting the gas supply amount of the natural gas into standard coal equivalent, namely 665 kgce; output the secondary energy Ucv，outConverting the outward output cooling capacity and the outward output heating capacity into standard coal equivalent, wherein the standard coal equivalent is 3923.8 kgce; the input quantity of secondary energy, namely the external input power supply quantity is subjected to equivalence treatment to obtain the consumption quantity U of primary energyse，inIs 2560 kgce.
Thus, the nominal conversion efficiency of the energy conversion system is:
and 3, carrying out equalization treatment on the collected secondary energy output quantity to obtain primary energy consumption, and carrying out equalization treatment on the clean energy generated energy in the collected primary energy output quantity to obtain traditional energy generated energy.
In particular, the amount of the solvent to be used,
the step 3 comprises the following steps:
step 3.1, carrying out equalization treatment on the collected secondary energy output quantity, namely converting the secondary energy output quantity into primary energy consumption, and satisfying the following relational expression:
Uev，out＝ce，coalEe，out+ch，outQh，out+cc，outQc，out
in the formula (I), the compound is shown in the specification,
ce，coalan equivalence coefficient, namely a power conversion standard coal consumption coefficient, which represents the primary energy consumption corresponding to the external input power supply quantity is determined according to the standard coal consumption level of thermal power generation in the current year,
ch，outan equating coefficient representing the heat supply quantity corresponding to the primary energy consumption quantity output outwards,
cc，outan equivalence coefficient representing the quantity of externally output cooling corresponding to the consumption of primary energy,
Ee，outindicating the amount of outgoing power supply during the sampling period,
Qh，outindicating the amount of heat supplied to the external output during the sampling period,
Qc，outindicating the amount of cooling delivered outward during the sampling period.
In particular, the amount of the solvent to be used,
in step 3.1, the process is carried out,
the equivalence coefficient of the single heat supply system taking electricity as energy, which outputs heat supply amount corresponding to primary energy consumption, meets the following relational expression:
in the formula (I), the compound is shown in the specification,
EERh，erepresenting the system heating energy efficiency ratio;
in the preferred embodiment, the heat supply system comprises a ground source heat pump and a gas-fired boiler, so that when the ground source heat pump is used as the first heat supply device of the heat supply system, the heat supply system outputs equivalent coefficients of the heat supply amount corresponding to the primary energy consumption amount
Is 0.01975 kgce/MJ.
The equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity of a single heat supply system taking electricity as energy satisfies the following relational expression:
in the formula (I), the compound is shown in the specification,
EERc，erepresenting the system refrigeration energy efficiency ratio;
in the preferred embodiment, the external cooling includes a ground source heat pump, so that it outputs cooling externallyEquivalent coefficient c of cold quantity corresponding to primary energy consumptionc，outIs 0.01975 kgce/MJ.
In particular, the amount of the solvent to be used,
in step 3.1, the process is carried out,
the single heating system driven by the conventional energy sources outputs the equivalent coefficient of the heating load corresponding to the primary energy consumption amount to the outside, and the equivalent coefficient meets the following relational expression:
in the formula (I), the compound is shown in the specification,
αh，coalthe coefficient of the thermal signature coal is represented,
ηhrepresents the rated thermal efficiency of the system;
in the preferred embodiment, the heat supply system comprises a ground source heat pump and a gas-fired boiler, so that when the gas-fired boiler is used as the second heat supply device of the heat supply system, the heat supply system outputs equivalent coefficients of heat supply amount corresponding to primary energy consumption
Is 0.03877 kgce/MJ.
The equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity of a single cooling system driven by the conventional energy meets the following relational expression:
in the formula (I), the compound is shown in the specification,
αc，coalthe coefficient of the cold-power signature coal is represented,
ηcindicating the rated cooling efficiency of the system.
In particular, the amount of the solvent to be used,
in step 3.1, the process is carried out,
the heat supply system is composed of a plurality of heat supply devices, and the equivalence coefficient of the heat supply quantity corresponding to the primary energy consumption quantity which is output outwards meets the following relational expression:
in the formula (I), the compound is shown in the specification,
in the preferred embodiment, the heat supply system of the energy conversion system includes a ground source heat pump and a gas boiler, so that the equivalence coefficient c of the primary energy consumption of the heat supply is output outwardsh，outIs 0.02414 kgce/MJ.
The plurality of cooling devices form a cooling system, and the equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity meets the following relational expression:
in the formula (I), the compound is shown in the specification,
In the preferred embodiment, the collected secondary energy output is subjected to equalization processing, that is, the output of cooling energy and the output of heating energy are converted into the standard coal equivalent Uev，outIs 2556.6 kgce.
Step 3.2, carrying out equalization processing on the collected primary energy input quantity, namely converting the clean energy generating capacity in the primary energy input quantity into the traditional energy generating capacity in an equivalent manner, and satisfying the following relational expression:
Uere，t＝ce，coalEere
in the formula (I), the compound is shown in the specification,
Eererepresenting clean energy generation during a sampling period;
in the preferred embodiment, the equivalent of the clean energy power generation is converted into the traditional energy power generation Uere，tIs 640 kgce.
And 4, calculating the operation conversion efficiency and the system design conversion efficiency of the system, and detecting the comprehensive energy efficiency of the energy conversion system in the current sampling period.
In particular, the amount of the solvent to be used,
step 4 comprises the following steps:
step 4.1, calculating the operation conversion efficiency of the system according to the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，inrepresents the primary energy consumption in the energy conversion system, namely the primary energy input,
Use，inrepresents the primary energy consumption after the input quantity of the secondary energy in the energy conversion system is equalized,
Uere，tthe acquired primary energy input quantity is subjected to equalization processing, namely the clean energy generating capacity in the primary energy input quantity is converted into the traditional energy generating capacity through equivalence,
Uev，outthe acquired secondary energy output quantity is subjected to equalization treatment, namely the secondary energy output quantity is converted into primary energy consumption;
in the preferred embodiment, the system operation conversion efficiency etawIs 0.66.
Step 4.2, calculating the system design conversion efficiency according to the following relational expression:
in the formula (I), the compound is shown in the specification,
ηtrepresenting a nominal conversion efficiency;
in the preferred embodiment, the system design conversion efficiency ηdIs 1.84.
And 4.3, detecting the comprehensive energy efficiency of the energy conversion system in the current sampling period based on the system operation conversion efficiency and the system design conversion efficiency, wherein the comprehensive energy efficiency is calculated as follows:
in the preferred embodiment, the overall energy efficiency η of the system is 125%.
The analysis and calculation results show that the design conversion efficiency of the system reaches 1.84 & gt 1, the overall design energy efficiency of the system is high, and the system is mainly benefited by the application of clean energy power generation and a ground source heat pump; the system operation conversion efficiency is only 66%, and the actual operation of the system has about 44% of optimized lifting space; the comprehensive energy efficiency of the system is 125%, and the comprehensive energy efficiency is higher than 100% and the energy efficiency level is better due to the application of clean energy and a ground source heat pump.
As shown in fig. 3, the energy conversion system energy efficiency detection system based on the secondary energy equalization includes: the energy source data acquisition module, the energy source data processing module and the comprehensive energy efficiency detection module;
the energy data acquisition module is used for acquiring the primary energy input quantity, the secondary energy input quantity and the secondary energy output quantity of the energy conversion system;
the energy data processing module is used for carrying out equivalence processing on the acquired primary energy input quantity, the acquired secondary energy input quantity and the acquired secondary energy output quantity;
and the comprehensive energy efficiency detection module is used for calculating the system operation conversion efficiency and the system design conversion efficiency according to the acquired data and the data after the equating processing, and giving a comprehensive energy efficiency detection result of the energy conversion system.
Compared with the prior art, the invention has the beneficial effects that:
1. the system operation conversion efficiency index is obtained based on secondary energy equivalent processing, quantitative calculation of the energy efficiency of the system under the real operation condition is achieved, and the problems that the absolute size of the actual efficiency of the system cannot be compared and the nominal conversion efficiency is possibly more than 100% due to the fact that the system principle and equipment are different are solved.
2. The comprehensive energy efficiency of the system is embodied in the energy efficiency of the operation link and the energy efficiency of the design link, the operation conversion efficiency and the design conversion efficiency index provided by the invention realize the energy efficiency control decoupling of the operation link and the design link, and provide a basis for further carrying out the energy efficiency optimization of the system.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (12)
1. The energy efficiency detection method of the energy conversion system based on the secondary energy equalization is characterized in that,
the detection method comprises the following steps:
step 1, collecting primary energy input quantity, secondary energy input quantity and secondary energy output quantity of an energy conversion system in a sampling period;
step 2, calculating the nominal conversion efficiency of the energy conversion system according to the collected primary energy input quantity, secondary energy input quantity and secondary energy output quantity;
step 3, carrying out equalization treatment on the collected secondary energy output quantity to obtain primary energy consumption, and carrying out equalization treatment on the clean energy generated energy in the collected primary energy output quantity to obtain traditional energy generated energy;
and 4, calculating the operation conversion efficiency and the system design conversion efficiency of the system, and detecting the comprehensive energy efficiency of the energy conversion system in the current sampling period.
2. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 1,
in the step 1, the process is carried out,
the primary energy input comprises: clean energy generated energy and traditional energy generated energy;
the secondary energy input comprises: external input power supply, external input heat supply and external input cold supply;
the secondary energy output amount includes: and outputting the power supply amount, the heat supply amount and the cooling amount outwards.
3. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 1,
in step 2, the nominal conversion efficiency satisfies the following relation:
in the formula (I), the compound is shown in the specification,
Upe，inrepresents the primary energy consumption in the energy conversion system, namely the primary energy input,
Use，inrepresents the primary energy consumption after the input quantity of the secondary energy in the energy conversion system is equalized,
Ucv，outrepresenting the secondary energy output of the energy conversion system.
4. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 3,
the primary energy consumption after the input quantity of the secondary energy is equalized meets the following relational expression:
Use，in＝ce，coalEe，in+ch，inQh，in+cc，inQc，in
in the formula (I), the compound is shown in the specification,
ce，coalan equivalence coefficient, namely a power conversion standard coal consumption coefficient, which represents the primary energy consumption corresponding to the external input power supply quantity is determined according to the standard coal consumption level of thermal power generation in the current year,
ch，inan equating coefficient representing the primary energy consumption corresponding to the external input heat supply,
cc，inan equating coefficient representing the primary energy consumption corresponding to the external input cooling capacity,
Ee，inindicating the amount of externally input power supply during the sampling period,
Qh，inindicating the amount of externally input heat supply during the sampling period,
Qc，inindicating the amount of externally input cooling during the sampling period.
5. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 4,
the external input heat supply amount corresponds to the equivalent coefficient of the primary energy consumption amount, and the equivalent coefficient meets the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，hrepresenting the total amount of primary energy consumption of the external heating system,
Ee，hrepresents the total amount of power consumption of the external heating system,
Qh，hrepresenting the total amount of heat supplied by the external heating system.
6. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 4,
the external input cooling capacity corresponds to the equivalent coefficient of the primary energy consumption and meets the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，crepresents the total primary energy consumption of the external cooling system,
Ee，crepresents the total amount of power consumption of the external cooling system,
Qc，cindicating the total amount of cooling of the external cooling system.
7. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 1,
the step 3 comprises the following steps:
step 3.1, carrying out equalization treatment on the collected secondary energy output quantity, namely converting the secondary energy output quantity into primary energy consumption, and satisfying the following relational expression:
Uev，out＝ce，coalEe，out+ch，outQh，out+cc，outQc，out
in the formula (I), the compound is shown in the specification,
ce，coalan equivalence coefficient, namely a power conversion standard coal consumption coefficient, which represents the primary energy consumption corresponding to the external input power supply quantity is determined according to the standard coal consumption level of thermal power generation in the current year,
ch，outan equating coefficient representing the heat supply quantity corresponding to the primary energy consumption quantity output outwards,
cc，outan equivalence coefficient representing the quantity of externally output cooling corresponding to the consumption of primary energy,
Ee，outindicating the amount of outgoing power supply during the sampling period,
Qh，outindicating the amount of heat supplied to the external output during the sampling period,
Qc，outshowing the amount of cooling delivered to the outside during the sampling period;
step 3.2, carrying out equalization processing on the collected primary energy input quantity, namely converting the clean energy generating capacity in the primary energy input quantity into the traditional energy generating capacity in an equivalent manner, and satisfying the following relational expression:
Uere，t＝ce，coalEere
in the formula (I), the compound is shown in the specification,
Eererepresenting the clean energy generation during the sampling period.
8. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 7,
in step 3.1, the process is carried out,
the equivalence coefficient of the single heat supply system taking electricity as energy, which outputs heat supply amount corresponding to primary energy consumption, meets the following relational expression:
in the formula (I), the compound is shown in the specification,
EERh，erepresenting the system heating energy efficiency ratio;
the equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity of a single heat supply system taking electricity as energy satisfies the following relational expression:
in the formula (I), the compound is shown in the specification,
EERc，eand the system refrigeration energy efficiency ratio is shown.
9. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 7,
in step 3.1, the process is carried out,
the single heating system driven by the conventional energy sources outputs the equivalent coefficient of the heating load corresponding to the primary energy consumption amount to the outside, and the equivalent coefficient meets the following relational expression:
in the formula (I), the compound is shown in the specification,
αh，coalthe coefficient of the thermal signature coal is represented,
ηhrepresents the rated thermal efficiency of the system;
the equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity of a single cooling system driven by the conventional energy meets the following relational expression:
in the formula (I), the compound is shown in the specification,
αc，coalthe coefficient of the cold-power signature coal is represented,
ηcindicating the rated cooling efficiency of the system.
10. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 7,
in step 3.1, the process is carried out,
the heat supply system is composed of a plurality of heat supply devices, and the equivalence coefficient of the heat supply quantity corresponding to the primary energy consumption quantity which is output outwards meets the following relational expression:
in the formula (I), the compound is shown in the specification,
the plurality of cooling devices form a cooling system, and the equivalence coefficient of the primary energy consumption corresponding to the externally output cooling capacity meets the following relational expression:
in the formula (I), the compound is shown in the specification,
11. The energy conversion system energy efficiency detection method based on secondary energy equating according to claim 1,
step 4 comprises the following steps:
step 4.1, calculating the operation conversion efficiency of the system according to the following relational expression:
in the formula (I), the compound is shown in the specification,
Upe，inrepresents the primary energy consumption in the energy conversion system, namely the primary energy input,
Use，inenergy source representation rotorThe primary energy consumption after the input quantity of the secondary energy in the system is equalized,
Uere，tthe acquired primary energy input quantity is subjected to equalization processing, namely the clean energy generating capacity in the primary energy input quantity is converted into the traditional energy generating capacity through equivalence,
Uev，outthe acquired secondary energy output quantity is subjected to equalization treatment, namely the secondary energy output quantity is converted into primary energy consumption;
step 4.2, calculating the system design conversion efficiency according to the following relational expression:
in the formula (I), the compound is shown in the specification,
ηtrepresenting a nominal conversion efficiency;
and 4.3, detecting the comprehensive energy efficiency of the energy conversion system in the current sampling period based on the system operation conversion efficiency and the system design conversion efficiency, wherein the comprehensive energy efficiency is calculated as follows:
12. the energy efficiency detection system using the energy conversion system energy efficiency detection method based on secondary energy equating according to claims 1 to 11, characterized in that:
the energy efficiency detection system comprises an energy data acquisition module, an energy data processing module and a comprehensive energy efficiency detection module;
the energy data acquisition module is used for acquiring the primary energy input quantity, the secondary energy input quantity and the secondary energy output quantity of the energy conversion system;
the energy data processing module is used for carrying out equivalence processing on the acquired primary energy input quantity, secondary energy input quantity and secondary energy output quantity;
and the comprehensive energy efficiency detection module is used for calculating the system operation conversion efficiency and the system design conversion efficiency according to the acquired data and the data after the equivalence processing, and giving a comprehensive energy efficiency detection result of the energy conversion system.
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