CN112948768B - Energy conversion system energy efficiency detection method and system based on secondary energy equivalence - Google Patents
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Abstract
The invention discloses an energy efficiency detection method and system for 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 to obtain system operation conversion efficiency and design conversion efficiency, realizing quantitative calculation of the energy efficiency of a real operation working condition of the system, and solving the problems that the absolute value of the actual efficiency of the system cannot be compared and the nominal conversion efficiency is possibly larger than 1 due to the difference of 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 developing energy efficiency optimization of the system.
Description
Technical Field
The invention relates to the technical field of comprehensive energy efficiency detection, in particular to an energy efficiency detection method and system of an energy conversion system based on secondary energy equivalence.
Background
Along with the development of economy and society and the improvement of technical level, the energy requirements of the user side are more and more diversified, the distributed clean energy, the heat pump, the triple co-generation and other energy conversion equipment of the user side are continuously popularized, and the diversified comprehensive supply of multiple energy sources such as electricity, heat, cold, gas and the like is a main development direction of the energy industry. The energy conversion system is the most central part in the comprehensive supply system of various energy sources, and the energy efficiency level of the energy conversion process is an important link for influencing the overall energy efficiency.
The traditional conversion efficiency calculation is carried out according to the ratio of the total output energy to the total input energy, different energy sources are folded by adopting an equivalent value folding method, however, the conversion efficiency design values of the energy conversion systems of different principles are greatly different, and the conversion efficiency calculation of different secondary energy sources according to the equivalent value folding is somewhat unreasonable. Therefore, it is necessary to establish a method and a system for detecting comprehensive energy efficiency of an energy conversion system, and quantitatively analyze the comprehensive energy efficiency level of the system from the design level and the operation level, so as to promote the energy efficiency of an energy comprehensive supply system and realize the energy conservation and emission reduction of the whole society.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an energy efficiency detection method and an energy efficiency detection system for an energy conversion system based on secondary energy equivalence, collect energy input quantity and energy output quantity of the energy conversion system, establish a comprehensive energy efficiency detection model of the energy conversion system based on secondary energy equivalence conversion, reflect real energy efficiency of the energy conversion system under different operation conditions, realize energy efficiency control decoupling of system design and system operation, and provide basic data for subsequent development of energy efficiency optimization.
The invention adopts the following technical scheme.
The energy efficiency detection method of the energy conversion system based on secondary energy equivalence 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 acquired primary energy input quantity, secondary energy input quantity and secondary energy output quantity;
step 3, performing equivalence treatment on the collected secondary energy output quantity to obtain primary energy consumption quantity, and performing equivalence treatment on clean energy generating capacity in the collected primary energy input quantity to obtain traditional energy generating capacity;
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 process comprises,
the primary energy input quantity includes: clean energy generating capacity and traditional energy generating capacity;
the secondary energy input quantity comprises: an external input power supply amount, an external input heat supply amount, and an external input cold supply amount;
the secondary energy output includes: the power supply quantity, the heat supply quantity and the cold supply quantity are output outwards.
Preferably, in step 2, the nominal conversion efficiency satisfies the following relation:
in the method, in the process of the invention,
U pe，in represents the primary energy consumption, namely the primary energy input quantity in the energy conversion system,
U se，in represents the primary energy consumption after the secondary energy input quantity is equalized in the energy conversion system,
U cv，out representing the secondary energy output of the energy conversion system.
The primary energy consumption after the secondary energy input quantity is equalized satisfies the following relation:
U se，in ＝c e，coal E e，in +c h，in Q h，in +c c，in Q c，in
in the method, in the process of the invention,
c e，coal the equivalent coefficient representing the primary energy consumption corresponding to the external input power supply, namely the coefficient of the standard coal consumption of degree electric power conversion, is determined according to the standard coal consumption level of the thermal power generation in the current year,
c h，in an equivalence coefficient representing the primary energy consumption corresponding to the externally input heat supply quantity,
c c，in an equivalence coefficient representing the primary energy consumption corresponding to the externally input cooling capacity,
E e，in representing the amount of externally input power in the sampling period,
Q h，in representing the amount of externally input heat supplied during the sampling period,
Q c，in representing the externally input cooling capacity during the sampling period.
The equivalence coefficient of the external input heat supply quantity corresponding to the primary energy consumption quantity meets the following relation:
in the method, in the process of the invention,
U pe，h represents the total amount of primary energy consumption of the external heating system,
E e，h indicating the total amount of power consumption of the external heating system,
Q h，h indicating the total amount of heat supplied by the external heating system.
The equivalence coefficient of the external input cooling capacity corresponding to the primary energy consumption satisfies the following relation:
in the method, in the process of the invention,
U pe，c represents the total primary energy consumption of the external cooling system,
E e，c represents the total amount of power consumption of the external cooling system,
Q c，c indicating the total amount of cooling of the external cooling system.
Preferably, step 3 comprises:
and 3.1, carrying out equivalence treatment on the acquired secondary energy output, namely converting the secondary energy output into primary energy consumption, and meeting the following relation:
U ev，out ＝c e，coal E e，out +c h，out Q h，out +c c，out Q c，out
in the method, in the process of the invention,
c e，coal the equivalent coefficient representing the primary energy consumption corresponding to the external input power supply, namely the coefficient of the standard coal consumption of degree electric power conversion, is determined according to the standard coal consumption level of the thermal power generation in the current year,
c h，out an equivalence coefficient representing the primary energy consumption corresponding to the output heat supply quantity,
c c，out an equivalence coefficient representing the primary energy consumption corresponding to the output cold supply quantity,
E e，out representing the amount of power supplied to the output during the sampling period,
Q h，out indicating the amount of heat supplied to the output during the sampling period,
Q c，out represents the output cooling capacity in the sampling period;
and 3.2, carrying out equivalence treatment on the acquired primary energy input quantity, namely converting the clean energy generating capacity equivalence in the primary energy input quantity into the traditional energy generating capacity, and meeting the following relation:
U ere，t ＝c e，coal E ere
in the method, in the process of the invention,
E ere representing clean energy generation during a sampling period.
In the step 3.1 of the process,
and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity of the single heat supply system taking electricity as energy source satisfies the following relation:
in the method, in the process of the invention,
EER h，e representing the heating energy efficiency ratio of the system;
and the equivalence coefficient of the primary energy consumption corresponding to the output cold supply quantity of the single heat supply system taking electricity as energy meets the following relation:
in the method, in the process of the invention,
EER c，e representing the refrigeration energy efficiency ratio of the system.
In the step 3.1 of the process,
and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity of the single heat supply system driven by conventional energy sources satisfies the following relation:
in the method, in the process of the invention,
α h，coal the coefficient of the thermal fracture mark coal is represented,
η h indicating the rated thermal efficiency of the system;
the equivalent coefficient of the primary energy consumption corresponding to the outward output cold supply quantity of a single cold supply system driven by conventional energy sources meets the following relation:
in the method, in the process of the invention,
α c，coal the cold force fracture index coal coefficient is represented,
η c indicating the nominal cold efficiency of the system.
In the step 3.1 of the process,
the plurality of heating devices form a heating system, and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity satisfies the following relation:
in the method, in the process of the invention,
indicating the heating amount duty of the i-th device in the total amount of heat supply,
representing the output thermal index coal coefficient of the ith equipment;
the plurality of cooling devices form a cooling system, and the equivalent coefficient of primary energy consumption corresponding to the output cooling capacity outwards meets the following relation:
in the method, in the process of the invention,
indicating the refrigeration output duty cycle of the ith device,
and the output cold force index coal coefficient of the ith device is shown.
Preferably, step 4 comprises:
step 4.1, calculating the system operation conversion efficiency according to the following relation:
in the method, in the process of the invention,
U pe，in represents the primary energy consumption, namely the primary energy input quantity in the energy conversion system,
U se，in represents the primary energy consumption after the secondary energy input quantity is equalized in the energy conversion system,
U ere，t representing the equivalence treatment of the collected primary energy input quantity, namely converting the clean energy generating capacity equivalence in the primary energy input quantity into the traditional energy generating capacity,
U ev，out representing the equivalence treatment of the acquired secondary energy output quantity, namely converting the secondary energy output quantity into primary energy consumption;
and 4.2, calculating the system design conversion efficiency according to the following relation:
in the method, in the process of the invention,
η t representing a nominal conversion efficiency;
and 4.3, detecting the comprehensive energy efficiency of the energy conversion system under 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 equivalence 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 primary energy input quantity, secondary energy input quantity and 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 calculates the operation conversion efficiency and the system design conversion efficiency of the system according to the acquired data and the data after the equivalence treatment, and gives out the comprehensive energy efficiency detection result of the energy conversion system.
The invention has the beneficial effects that compared with the prior art:
1. the system operation conversion efficiency index is obtained based on secondary energy equivalence treatment, quantitative calculation of the energy efficiency of the real operation working condition of the system is realized, and the problems that the absolute value of the actual efficiency of the system cannot be compared and the nominal conversion efficiency is possibly more than 100% due to the difference of the system principle and equipment 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, and 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, thereby providing a foundation for further developing the energy efficiency optimization of the system.
Drawings
FIG. 1 is a flow chart of an energy efficiency detection method of an energy conversion system based on secondary energy equivalence;
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 equivalence of the present invention is applicable;
fig. 3 is a schematic diagram of an energy efficiency detection system of the energy conversion system based on secondary energy equivalence.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present invention and are not intended to limit the scope of protection of the present application.
Referring to fig. 1, the energy efficiency detection method of the energy conversion system based on secondary energy equivalence 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.
In particular, the method comprises the steps of,
in the step (1) of the process,
the primary energy input quantity includes: clean energy generating capacity and traditional energy generating capacity;
the secondary energy input quantity comprises: an external input power supply amount, an external input heat supply amount, and an external input cold supply amount;
the secondary energy output includes: the power supply quantity, the heat supply quantity and the cold supply quantity are output outwards.
According to the general energy flow diagram of the energy conversion system shown in fig. 2, the energy conversion system in a certain area is taken as a research object in the preferred embodiment, and the energy conversion system comprises: primary energy input, secondary energy input and secondary energy output.
The primary energy input quantity comprises natural gas supply quantity and clean energy generating quantity; the secondary energy input quantity is an external input power supply quantity; the secondary energy output includes: the equipment for supplying heat to the output comprises a ground source heat pump and a gas boiler, and the equipment for supplying cold to the output 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 sampling period energy input data of energy conversion system
TABLE 3 statistics of System energy output data during periods
In practical applications, the energy amounts in 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 acquired primary energy input quantity, secondary energy input quantity and secondary energy output quantity.
In particular, the method comprises the steps of,
in step 2, the nominal conversion efficiency satisfies the following relationship:
in the method, in the process of the invention,
U pe，in represents the primary energy consumption, namely the primary energy input quantity in the energy conversion system,
U se，in represents the primary energy consumption after the secondary energy input quantity is equalized in the energy conversion system,
U cv，out representing the secondary energy output of the energy conversion system.
In particular, the method comprises the steps of,
the primary energy consumption after the secondary energy input quantity is equalized satisfies the following relation:
U se，in ＝c e，coal E e，in +c h，in Q h，in +c c，in Q c，in
in the method, in the process of the invention,
c e，coal the equivalent coefficient representing the primary energy consumption corresponding to the external input power supply, namely the coefficient of the standard coal consumption of degree electric power conversion, is determined according to the standard coal consumption level of the thermal power generation in the current year,
c h，in an equivalence coefficient representing the primary energy consumption corresponding to the externally input heat supply quantity,
c c，in an equivalence coefficient representing the primary energy consumption corresponding to the externally input cooling capacity,
E e，in representing the amount of externally input power in the sampling period,
Q h，in representing the amount of externally input heat supplied during the sampling period,
Q c，in representing the externally input cooling capacity during the sampling period.
In particular, the method comprises the steps of,
the equivalence coefficient of the primary energy consumption of the externally input heat supply quantity meets the following relation:
in the method, in the process of the invention,
U pe，h represents the total amount of primary energy consumption of the external heating system,
E e，h indicating the total amount of power consumption of the external heating system,
Q h，h indicating the total amount of heat supplied by the external heating system.
In particular, the method comprises the steps of,
the equivalence coefficient of the primary energy consumption of the externally input cooling capacity meets the following relation:
in the method, in the process of the invention,
U pe，c represents the total primary energy consumption of the external cooling system,
E e，c represents the total amount of power consumed by the external cooling system,
Q c，c indicating the total amount of cooling of the external cooling system.
In the preferred embodiment, the primary energy input U pe，in I.e., the natural gas supply is converted into standard coal equivalent, which is 665kgce; output U of secondary energy cv，out Namely, the outward output cooling capacity and the outward output heat supply capacity are converted into standard coal equivalent, which is 3923.8kgce; the secondary energy input quantity, namely the external input power supply quantity is carried outPerforming equivalence treatment to obtain primary energy consumption U se，in 2560kgce.
Thus, the nominal conversion efficiency of the energy conversion system is:
and step 3, performing equivalence treatment on the acquired secondary energy output quantity to obtain primary energy consumption quantity, and performing equivalence treatment on the clean energy generating capacity in the acquired primary energy input quantity to obtain traditional energy generating capacity.
In particular, the method comprises the steps of,
the step 3 comprises the following steps:
and 3.1, carrying out equivalence treatment on the acquired secondary energy output, namely converting the secondary energy output into primary energy consumption, and meeting the following relation:
U ev，out ＝c e，coal E e，out +c h，out Q h，out +c c，out Q c，out
in the method, in the process of the invention,
c e，coal the equivalent coefficient representing the primary energy consumption corresponding to the external input power supply, namely the coefficient of the standard coal consumption of degree electric power conversion, is determined according to the standard coal consumption level of the thermal power generation in the current year,
c h，out an equivalence coefficient representing the primary energy consumption corresponding to the output heat supply quantity,
c c，out an equivalence coefficient representing the primary energy consumption corresponding to the output cold supply quantity,
E e，out representing the amount of power supplied to the output during the sampling period,
Q h，out indicating the amount of heat supplied to the output during the sampling period,
Q c，out indicating the output cooling capacity during the sampling period.
In particular, the method comprises the steps of,
in the step 3.1 of the process,
and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity of the single heat supply system taking electricity as energy source satisfies the following relation:
in the method, in the process of the invention,
EER h，e representing the heating energy efficiency ratio of the system;
in the preferred embodiment, the heat supply to the outside 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 equipment of the heat supply system, the heat supply to the outside corresponds to the equivalence coefficient of the primary energy consumptionIs 0.01975kgce/MJ.
And the equivalence coefficient of the primary energy consumption corresponding to the output cold supply quantity of the single heat supply system taking electricity as energy meets the following relation:
in the method, in the process of the invention,
EER c，e representing the refrigerating energy efficiency ratio of the system;
in the preferred embodiment, the outward output cooling includes a ground source heat pump, and therefore, the outward output cooling corresponds to the equivalence coefficient c of the primary energy consumption c，out Is 0.01975kgce/MJ.
In particular, the method comprises the steps of,
in the step 3.1 of the process,
and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity of the single heat supply system driven by conventional energy sources satisfies the following relation:
in the method, in the process of the invention,
α h，coal the coefficient of the thermal fracture mark coal is represented,
η h indicating the rated thermal efficiency of the system;
in the preferred embodiment, the heat supply to the outside comprises a ground source heat pump and a gas boiler, so that when the gas boiler is used as the second heat supply equipment of the heat supply system, the heat supply to the outside corresponds to the equivalence coefficient of the primary energy consumptionIs 0.03877kgce/MJ.
The equivalent coefficient of the primary energy consumption corresponding to the outward output cold supply quantity of a single cold supply system driven by conventional energy sources meets the following relation:
in the method, in the process of the invention,
α c，coal the cold force fracture index coal coefficient is represented,
η c indicating the nominal cold efficiency of the system.
In particular, the method comprises the steps of,
in the step 3.1 of the process,
the plurality of heating devices form a heating system, and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity satisfies the following relation:
in the method, in the process of the invention,
indicating the heating amount duty of the i-th device in the total amount of heat supply,
representing the output thermal index coal coefficient of the ith equipment;
in the preferred embodiment, the heat supply system in the energy conversion system includes the ground source heat pump and the gas boiler, and therefore, the equivalence coefficient c of the primary energy consumption amount of the heat supply is output to the outside h，out Is 0.02414kgce/MJ.
The plurality of cooling devices form a cooling system, and the equivalent coefficient of primary energy consumption corresponding to the output cooling capacity outwards meets the following relation:
in the method, in the process of the invention,
indicating the cooling capacity ratio of the ith equipment in the total cooling quantity,
and the output cold force index coal coefficient of the ith device is shown.
In the preferred embodiment, the acquired secondary energy output is subjected to equivalence treatment, namely, the outward output cooling capacity and the outward output cooling capacity are converted into standard coal equivalent U ev，out 2556.6kgce.
And 3.2, carrying out equivalence treatment on the acquired primary energy input quantity, namely converting the clean energy generating capacity equivalence in the primary energy input quantity into the traditional energy generating capacity, and meeting the following relation:
U ere，t ＝c e，coal E ere
in the method, in the process of the invention,
E ere representing clean energy power generation in a sampling period;
in the preferred embodiment, the equivalent conversion of the clean energy power generation amount into the traditional energy power generation amount U ere，t 640kgce.
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 method comprises the steps of,
step 4 comprises:
step 4.1, calculating the system operation conversion efficiency according to the following relation:
in the method, in the process of the invention,
U pe，in represents the primary energy consumption, namely the primary energy input quantity in the energy conversion system,
U se，in represents the primary energy consumption after the secondary energy input quantity is equalized in the energy conversion system,
U ere，t representing the equivalence treatment of the collected primary energy input quantity, namely converting the clean energy generating capacity equivalence in the primary energy input quantity into the traditional energy generating capacity,
U ev，out representing the equivalence treatment of the acquired secondary energy output quantity, namely converting the secondary energy output quantity into primary energy consumption;
the preferred embodiment has the system operation conversion efficiency eta w 0.66.
And 4.2, calculating the system design conversion efficiency according to the following relation:
in the method, in the process of the invention,
η t representing a nominal conversion efficiency;
the preferred embodiment has the system design conversion efficiency eta d 1.84.
And 4.3, detecting the comprehensive energy efficiency of the energy conversion system under 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 system comprehensive energy efficiency eta is 125%.
The analysis and calculation result shows that the design conversion efficiency of the system reaches 1.84 & gt 1, the overall design energy efficiency of the system is higher, and the system is mainly beneficial to the application of clean energy power generation and ground source heat pump; the system operation conversion efficiency is only 66%, and the system actually operates with 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 efficiency detection system of the energy conversion system based on secondary energy equivalence includes: the 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 primary energy input quantity, secondary energy input quantity and 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 calculates the operation conversion efficiency and the system design conversion efficiency of the system according to the acquired data and the data after the equivalence treatment, and gives out the comprehensive energy efficiency detection result of the energy conversion system.
The invention has the beneficial effects that compared with the prior art:
1. the system operation conversion efficiency index is obtained based on secondary energy equivalence treatment, quantitative calculation of the energy efficiency of the real operation working condition of the system is realized, and the problems that the absolute value of the actual efficiency of the system cannot be compared and the nominal conversion efficiency is possibly more than 100% due to the difference of the system principle and equipment 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, and 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, thereby providing a foundation for further developing the energy efficiency optimization of the system.
While the applicant has described and illustrated the embodiments of the present invention in detail with reference to the drawings, it should be understood by those skilled in the art that the above embodiments are only 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 to limit the scope of the present invention, but any improvements or modifications based on the spirit of the present invention should fall within the scope of the present invention.
Claims (9)
1. An energy efficiency detection method of an energy conversion system based on secondary energy equivalence 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 acquired primary energy input quantity, secondary energy input quantity and secondary energy output quantity; the nominal conversion efficiency satisfies the following relationship:
wherein eta is t For nominal conversion efficiency, U pe，in Represents the primary energy consumption, namely the primary energy input, U in the energy conversion system se，in Represents the primary energy consumption after the secondary energy input quantity is equalized in the energy conversion system, U cv，out Representing the secondary energy output of the energy conversion system;
step 3, performing equivalence treatment on the collected secondary energy output quantity to obtain primary energy consumption quantity, and performing equivalence treatment on clean energy generating capacity in the collected primary energy input quantity to obtain traditional energy generating capacity; comprising the following steps:
step 3.1, carrying out equivalence treatment on the acquired secondary energy output quantity, and meeting the following relation:
U ev，out ＝c e，coal E e，out +c h，out Q h，out +c c，out Q c，out
wherein, c e，coal C, determining an equivalence coefficient representing the primary energy consumption corresponding to the external input power supply, namely a coefficient of standard coal consumption of degree electric power conversion according to the standard coal consumption level of the thermal power generation in the current year h，out An equivalence coefficient representing the primary energy consumption corresponding to the heat supply quantity output to the outside, c e，out An equivalence coefficient representing the primary energy consumption corresponding to the outward output cold supply quantity, F e，out Represents the output power supply quantity in the sampling period, Q h，out Represents the amount of heat supplied to the outside during the sampling period, Q c，out Represents the output cooling capacity in the sampling period;
and 3.2, carrying out equivalence treatment on the clean energy generating capacity in the acquired primary energy input quantity, wherein the following relational expression is satisfied:
U ere，t ＝c e，coal E ere
wherein E is ere Representing clean energy power generation in a sampling period;
step 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;
the system operation conversion efficiency eta is calculated according to the following relation w ：The system design conversion efficiency is calculated according to the following relation: />Based on the system operation conversion efficiency and the system design conversion efficiency, the current methodThe comprehensive energy efficiency of the energy conversion system in the sampling period is detected, and the comprehensive energy efficiency is calculated as follows:
2. the energy efficiency detection method of the energy conversion system based on secondary energy equivalence according to claim 1, wherein,
in the step (1) of the process,
the primary energy input amount includes: clean energy generating capacity and traditional energy generating capacity;
the secondary energy input quantity comprises: an external input power supply amount, an external input heat supply amount, and an external input cold supply amount;
the secondary energy output comprises: the power supply quantity, the heat supply quantity and the cold supply quantity are output outwards.
3. The energy efficiency detection method of the energy conversion system based on secondary energy equivalence according to claim 1, wherein,
the primary energy consumption after the secondary energy input quantity is subjected to equivalence meets the following relation:
U se，in ＝c e，coal E e，in +c h，in Q h，in +c c，in Q c，in
in the method, in the process of the invention,
c e，coal the equivalent coefficient representing the primary energy consumption corresponding to the external input power supply, namely the coefficient of the standard coal consumption of degree electric power conversion, is determined according to the standard coal consumption level of the thermal power generation in the current year,
c h，in an equivalence coefficient representing the primary energy consumption corresponding to the externally input heat supply quantity,
c c，in an equivalence coefficient representing the primary energy consumption corresponding to the externally input cooling capacity,
E e，in representing external input during a sampling periodThe power is supplied in the amount of power supply,
Q h，in representing the amount of externally input heat supplied during the sampling period,
Q c，in representing the externally input cooling capacity during the sampling period.
4. The energy efficiency detection method of the energy conversion system based on the secondary energy equivalence according to claim 3, wherein,
the equivalence coefficient of the external input heat supply quantity corresponding to the primary energy consumption quantity meets the following relation:
in the method, in the process of the invention,
U pe，h represents the total amount of primary energy consumption of the external heating system,
E e，h indicating the total amount of power consumption of the external heating system,
Q h，h indicating the total amount of heat supplied by the external heating system.
5. The energy efficiency detection method of the energy conversion system based on the secondary energy equivalence according to claim 3, wherein,
the equivalence coefficient of the external input cooling capacity corresponding to the primary energy consumption satisfies the following relation:
in the method, in the process of the invention,
U pe，c represents the total primary energy consumption of the external cooling system,
E e，c represents the total amount of power consumption of the external cooling system,
Q c，c indicating the total amount of cooling of the external cooling system.
6. The energy efficiency detection method of the energy conversion system based on secondary energy equivalence according to claim 1, wherein,
in the step 3.1 of the process,
and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity of the single heat supply system taking electricity as energy source satisfies the following relation:
in the method, in the process of the invention,
EER h，e representing the heating energy efficiency ratio of the system;
and the equivalence coefficient of the primary energy consumption corresponding to the output cold supply quantity of the single heat supply system taking electricity as energy meets the following relation:
in the method, in the process of the invention,
EER c，e representing the refrigeration energy efficiency ratio of the system.
7. The energy efficiency detection method of the energy conversion system based on secondary energy equivalence according to claim 1, wherein,
in the step 3.1 of the process,
and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity of the single heat supply system driven by conventional energy sources satisfies the following relation:
in the method, in the process of the invention,
α h，coal the coefficient of the thermal fracture mark coal is represented,
η h indicating the rated thermal efficiency of the system;
the equivalent coefficient of the primary energy consumption corresponding to the outward output cold supply quantity of a single cold supply system driven by conventional energy sources meets the following relation:
in the method, in the process of the invention,
α c，coal the cold force fracture index coal coefficient is represented,
η c indicating the nominal cold efficiency of the system.
8. The energy efficiency detection method of the energy conversion system based on secondary energy equivalence according to claim 1, wherein,
in the step 3.1 of the process,
the plurality of heating devices form a heating system, and the equivalence coefficient of the primary energy consumption corresponding to the output heat supply quantity satisfies the following relation:
in the method, in the process of the invention,
indicating the heating amount duty of the i-th device in the total amount of heat supply,
representing the output thermal index coal coefficient of the ith equipment;
the plurality of cooling devices form a cooling system, and the equivalent coefficient of primary energy consumption corresponding to the output cooling capacity outwards meets the following relation:
in the method, in the process of the invention,
indicating the refrigeration output duty cycle of the ith device,
and the output cold force index coal coefficient of the ith device is shown.
9. An energy efficiency detection system using the energy efficiency detection method of the secondary energy equivalence based energy conversion system according to any one of claims 1 to 8, 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 primary energy input quantity, secondary energy input quantity and 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;
the comprehensive energy efficiency detection module calculates the operation conversion efficiency and the system design conversion efficiency of the system according to the collected data and the data after the equivalence treatment, and gives out the comprehensive energy efficiency detection result of the energy conversion system.
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