CN112070274A - Efficiency evaluation method and system of comprehensive energy system - Google Patents
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Abstract
The present disclosure provides an integrated energy system
The efficiency evaluation method and system determine the boundary of the comprehensive energy system to be evaluated, and determine the energy of the comprehensive energy system to be evaluated according to the boundary of the comprehensive energy system to be evaluated
Efficiency calculation formula for setting energy of comprehensive energy system to be evaluated
An efficiency evaluation parameter; obtaining the operation data of the comprehensive energy system to be evaluated and comprehensively to be evaluated, and utilizing the operation data to be evaluatedEstimating the operation data of the comprehensive energy system, and calculating the energy of the comprehensive energy system to be estimated at determined time intervals
And calculating to obtain the energy of the comprehensive energy system to be evaluated
Description
Technical Field
The utility model belongs to the technical field of energy efficiency analysis, a comprehensive energy system is related to
Provided are a method and a system for evaluating efficiency.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the rapid development of social economy in China, the total energy demand is increased rapidly, and the contradiction between energy supply and demand is increasingly prominent. In recent years, energy problems gradually become a hotspot discussed in all circles of society, energy internet comprehensive energy systems and other concepts are provided, a brand new view is provided for energy analysis, and the convergence and innovation among all fields and all disciplines are promoted.
The comprehensive energy system is an important physical carrier of an energy internet, comprises a plurality of energy networks such as electricity, heat and cold, strong coupling exists among different energy networks, interconnection and mutual assistance of different kinds of energy and cascade utilization of the energy can be realized by applying various advanced energy production and conversion technologies, and the thermal efficiency of the comprehensive energy system is improved.
The efficiency analysis method is based on the first law and the second law of thermodynamics and combines the quantity and the quality of energyOrganically combined, the essence of energy quality degradation in the processes of energy transmission and energy conversion can be deeply disclosed, the method is the core of researching the multi-energy mutual-aid characteristics, system optimization design, energy optimization scheduling, energy management and the like of the comprehensive energy system, and the method is effective
The efficiency evaluation method is crucial to the development of the comprehensive energy system, and according to the knowledge of the inventor, no effective method is available at present
And (3) an efficiency evaluation method.
Disclosure of Invention
The present disclosure provides an integrated energy system to solve the above problems
The method and the system for evaluating the efficiency are based on the essential characteristics of a multi-energy complementary comprehensive energy system, calculate the available energy of low-level heating values of various energy sources on the basis of a first law and a second law of thermodynamics, and realize the comprehensive energy system by comprehensively considering the input of electric energy, natural gas, a heating pipe network, steam and solar energy, the output of power generation, cooling supply, heating supply and the like
Evaluation of efficiency according to
And the efficiency evaluation result shows the conversion condition of energy quality in the system, and provides a basis for planning decision, energy-saving technical improvement and energy efficiency optimization of the comprehensive energy system.
According to some embodiments, the following technical scheme is adopted in the disclosure:
comprehensive energy system
An efficiency evaluation method comprising the steps of:
determining the boundary of the comprehensive energy system to be evaluated, and determining the energy of the comprehensive energy system to be evaluated according to the boundary of the comprehensive energy system to be evaluated
Efficiency calculation formula for setting energy of comprehensive energy system to be evaluated
An efficiency evaluation parameter;
obtaining the operation data of the comprehensive energy system to be evaluated, calculating the energy of the comprehensive energy system to be evaluated at a determined time interval by using the operation data of the comprehensive energy system to be evaluated
And calculating to obtain the energy of the comprehensive energy system to be evaluated
Efficiency.
As an alternative embodiment, the specific process of determining the boundary of the integrated energy system to be evaluated includes: the boundary comprises the input and the output of the comprehensive energy system to be evaluated, the input of the comprehensive energy system to be evaluated comprises natural gas input quantity and power supply input quantity, and the output of the comprehensive energy system to be evaluated comprises power supply output quantity, cold supply output quantity and heat supply output quantity.
And as a further limitation, the input and the output of the comprehensive energy system to be evaluated, such as power supply output quantity, cold supply output quantity, heat supply output quantity and the like, are obtained through a cold meter, a heat meter, an electric meter, a gas meter and a solar illuminometer at the output end and the input end of the comprehensive energy system to be evaluated.
As an alternative embodiment, the energy step utilization η is calculated by the formula:
wherein E isoeFor outputting electric energy
；QoecFor outputting cold
；QoehFor outputting heat
；EieFor converting input energy
A total value of (d); pieFor input of electric energy
；FieFor feeding natural gas
；QieFor supplying heat to hot-water pipe networks
；GieFor input of steam energy
；TieFor inputting solar energy
。
As an alternative embodiment, theEvaluating energy of an integrated energy system
The evaluation parameters of the efficiency comprise the energy coefficient of the electric energy in the operation stage of the comprehensive energy system to be evaluated, the density and the specific heat capacity of water at different temperatures, the energy coefficient and the low-order heating value of natural gas, the energy coefficient and the energy conversion value of steam and the radiation temperature of the sun, and the evaluation time interval in the operation stage of the comprehensive energy system to be evaluated is the maximum sampling interval time of the meters of all input and output gateways of the comprehensive energy system to be evaluated.
As an alternative embodiment, the energy of the integrated energy system under evaluation
The operation data of the efficiency comprises the natural gas supply quantity, the electric energy supply quantity, the hot water supply quantity, the steam supply quantity, the solar energy supply quantity and the ambient temperature at the input end of the comprehensive energy system to be evaluated, and the power supply quantity, the cooling supply quantity and the heating supply quantity at the output end.
Comprehensive energy system
An efficiency assessment system comprising:
the boundary determining module is configured to determine the boundary of the comprehensive energy system to be evaluated;
energy of
An efficiency determination module configured to determine an energy of the integrated energy system to be evaluated based on a boundary of the integrated energy system to be evaluated
An efficiency calculation formula;
a setting module configured to set an energy of the integrated energy system to be evaluated
An efficiency evaluation parameter;
the operation calculation module is configured to acquire the operation data of the comprehensive energy system to be evaluated and calculate the energy of the comprehensive energy system to be evaluated at a determined time interval by using the operation data of the comprehensive energy system to be evaluated
And calculating to obtain the energy of the comprehensive energy system to be evaluated
Efficiency.
Said energy being
An efficiency determination module comprising:
for outputting electric energy
A calculation module configured to calculate the output electrical energy
；
Of cold output
A computing module configured to compute output coldness
；
For discharging heat
A calculation module configured to calculate an output heat quantity
；
Conversion of input energy
Is configured to calculate an input energy conversion
A total value of (d);
input of electric energy
A calculation module configured to calculate input electrical energy
；
For introducing natural gas
A calculation module configured to calculate an input natural gas
；
For inputting heat into hot-water pipe network
A calculation module configured to calculate an input heat of the hot water pipe network
；
With input of steam energy
A calculation module configured to calculate an input steam energy source
；
Inputting solar energy
A calculation module configured to calculate input solar energy
。
A computer readable storage medium having stored therein a plurality of instructions adapted to be loaded by a processor of a terminal device and to execute said instructions of an integrated energy system
And (3) an efficiency evaluation method.
A terminal device comprising a processor and a computer readable storage medium, the processor being configured to implement instructions; the computer readable storage medium stores instructions adapted to be loaded by the processor and executed to implement the integrated energy system
And (3) an efficiency evaluation method.
Compared with the prior art, the beneficial effect of this disclosure is:
comprehensive energy system
The efficiency evaluation method starts from the essential characteristics of the multi-energy complementary comprehensive energy system, calculates the available energy of various energy forms on the basis of a first law and a second law of thermodynamics, and realizes the comprehensive energy system by comprehensively considering the input of electric energy, natural gas, a heat pipe network, steam and solar energy, the output of power generation, cold supply, heat supply and the like
And (6) evaluating the efficiency.
The specific implementation mode is as follows:
the present disclosure is further illustrated by the following examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Comprehensive energy system
An efficiency evaluation method includes the steps of,
s1: and determining the boundary of the comprehensive energy system to be evaluated.
Specifically, in step S1, the boundary includes an input and an output of the integrated energy system to be evaluated, the input of the integrated energy system to be evaluated includes a natural gas input amount and a power supply input amount, and the output of the integrated energy system to be evaluated includes a power supply output amount, a cooling output amount, and a heating output amount; when specifically determining, because the input and the output of treating the comprehensive energy system that assesses all are provided with the strapping table, consequently, through cold strapping table, heat meter, electric meter, gas strapping table and the solar energy illuminometer of the output of treating the comprehensive energy system that assesses and input can acquire treat input and output such as the power supply output quantity, the cooling output quantity and the heat supply output quantity of assessing the comprehensive energy system.
S2: determining energy of an integrated energy system to be assessed
And (4) calculating the efficiency.
Due to energy
Efficiency considering the performance of cooling, heating and power products from the viewpoint of energy quality, the present invention utilizes the comprehensive energy system to be evaluated
And the efficiency of the comprehensive energy system to be evaluated is evaluated.
In step S2, the energy step utilization η is calculated by the formula:
wherein E isoeFor outputting electric energy
；QoecFor outputting cold
；QoehFor outputting heat
；EieFor converting input energy
A total value of (d); pieFor input of electric energy
；FieFor feeding natural gas
；QieFor supplying heat to hot-water pipe networks
；GieFor input of steam energy
；TieFor inputting solar energy
。
EoeThe calculation formula of (2) is as follows:
Eoe＝λeW
wherein E isoeThe unit is kJ; lambda [ alpha ]eFor the low-order heating value of the electric energy, through looking up various energy conversion standard coefficient tables, choose 3596 KJ/kWh; w is the net output electric quantity of the combined supply system, and the unit is kWh.
QoecIs calculated by the formula
Wherein Q isoecThe unit is kJ; m is the mass of the output cold water, the unit is kg, and the calculation is carried out according to m ═ rho V; ρ is the density of cold water by looking up the density chart of water at different water temperatures (available from CRC Handbook of Chemistry and Physics, 87)thEdition), take 103kg/m3(ii) a V is the flow of cold water in m3；cpThe specific heat capacity of water is taken as 4.205 kJ/(kg. K) by looking up the specific heat capacity table of water at different temperatures; t is0Is ambient temperature in K; t isoutThe temperature of the water outlet of the water chilling unit is K; t isinThe temperature of a water return port of the water chilling unit is represented by K.
QoehThe calculation formula of (2) is as follows:
wherein Q isoehThe unit is kJ; m is the mass of the output hot water, the unit is kg, and the calculation is carried out according to m ═ rho V; rho is hot water density, 10 is obtained by looking up a density table of water at different water temperatures3kg/m3(ii) a V is the hot water flow rate, and the unit is m3；cpThe specific heat capacity of water is taken as 4.205 kJ/(kg. K) by looking up the specific heat capacity table of water at different temperatures; t is0Is ambient temperature in K; t isoutThe temperature is the temperature of the output hot water and is expressed in K; t isinThe return water temperature of hot water is expressed in K.
PieThe calculation formula of (2) is as follows:
Pie＝λeW
wherein, PieThe unit is kJ; lambda [ alpha ]eFor the low heating value of the electric energy, 3596KJ/kWh is selected by checking various energy conversion standard coefficients (the department of public transportation of State statistics of energy statistics knowledge handbook can be used); w is the net input electric quantity of the combined supply system, and the unit is kWh.
Fie ofIs calculated by the formula
Fie＝λgQg
Wherein λ isgThe natural gas energy quality coefficient is calculated according to the combustion temperature of 1300 ℃, and the calculation formula is
Wherein, T0Is ambient temperature in K;
wherein Q isgThe heat released when the natural gas is completely combusted is calculated by the formula
Qg＝V·Hg
Wherein V is the volume of natural gas consumed, HgFor the low-order heating value of natural gas, 36000KJ/m is taken by looking up various energy conversion standard coefficient tables3。
QieIs calculated by the formula
Wherein Q isieThe unit is kJ; m is the mass of hot water input by a heating power pipe network, the unit is kg, and calculation is carried out according to m ═ rho V; rho is hot water density, and 10 is obtained by looking up density tables of water at different temperatures3kg/m3(ii) a V is the hot water flow, which can be measured by a flowmeter and has the unit of m3(ii) a cp is the specific heat capacity of water, and the specific heat capacity table of water at different temperatures is looked up and taken as 4.205 kJ/(kg.K); t is0Is the ambient temperature in units of K, ToutThe temperature of a water inlet of a heat distribution pipe network is K; t isinThe temperature of a water return port of the heat distribution pipe network is represented by K.
GieThe calculation formula of (2) is as follows:
Gie＝λgwQgw
wherein λ isgwThe calculation formula is as follows:
wherein, T0Is the ambient temperature in units of K, TSteam generatorAnd querying the saturated temperature corresponding to the steam pressure according to the saturated temperature of the steam pressure and the energy conversion value table.
Wherein Q isgwThe difference value of the energy contained in the steam after input and output is calculated by the following formula:
Qgw＝(qm1h”1-qm2h”2)Δt
wherein q ism1、qm2The steam mass flow measured under the operating conditions before and after the temperature and pressure change process (inlet and outlet of the heat exchange device) is kg/s; h'1、h”2The specific enthalpy of the steam before and after the temperature and pressure change (at the inlet and the outlet of a certain device or equipment), namely the steam energy conversion value, is inquired according to a saturated temperature and energy conversion value inquiry table (a saturated steam comparison table can be used) of the steam pressure, and kJ/kg; Δ t is the steam circulation time.
TieThe calculation formula of (2) is as follows:
Tie＝G·Acell·Φ
wherein G represents the solar radiation illumination intensity in W/m2；AcellRepresents the area of the solar cell in m2(ii) a Phi is the solar energy quality coefficient, and the calculation formula is as follows:
wherein, T0Is ambient temperature in K; t isSThe unit of the solar radiation temperature is K, and 6000K is generally taken.
S3: determining energy of an integrated energy system to be assessed
An efficiency evaluation parameter;
energy of the comprehensive energy system to be evaluated during specific calculation
The evaluation parameters of the efficiency comprise the energy coefficient of the electric energy in the operation stage of the comprehensive energy system to be evaluated, the density and specific heat capacity of water at different temperatures, the energy coefficient and low heating value of natural gas, the energy coefficient and energy conversion value of steam and the radiation temperature of the sun, and the evaluation time interval in the operation stage of the comprehensive energy system to be evaluated is the maximum sampling interval time of the meters of each input and output gateway of the comprehensive energy system to be evaluated, and the evaluation time interval value is 10 min.
S4: the method comprises the steps of obtaining operation data of the comprehensive energy system to be evaluated, specifically, the energy of the comprehensive energy system to be evaluated
The operation data of the efficiency comprises the natural gas supply quantity, the electric energy supply quantity, the hot water supply quantity, the steam supply quantity, the solar energy supply quantity and the ambient temperature at the input end of the comprehensive energy system to be evaluated, and the power supply quantity, the cooling supply quantity and the heating supply quantity at the output end.
S5: utilizing the operation data of the comprehensive energy system to be evaluated and the energy of each energy source
Calculating the energy of the comprehensive energy system to be evaluated at the determined time interval by using a calculation formula
And according to energy
The energy of the comprehensive energy system to be evaluated is obtained according to the calculation result
And (5) concluding the efficiency.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the steps.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it is not intended to limit the scope of the present disclosure, and it should be understood by those skilled in the art that various modifications and changes may be made without inventive efforts based on the technical solutions of the present disclosure.
Claims (10)
1. Comprehensive energy system
The efficiency evaluation method is characterized by comprising the following steps: the method comprises the following steps:
determining the boundary of the comprehensive energy system to be evaluated, and determining the energy of the comprehensive energy system to be evaluated according to the boundary of the comprehensive energy system to be evaluated
Efficiency calculation formula for setting energy of comprehensive energy system to be evaluated
An efficiency evaluation parameter;
obtaining the operation data of the comprehensive energy system to be evaluated, calculating the energy of the comprehensive energy system to be evaluated at a determined time interval by using the operation data of the comprehensive energy system to be evaluated
Calculating to obtain the energy of the comprehensive energy system to be evaluated
Efficiency.
2. An integrated energy system according to claim 1
The efficiency evaluation method is characterized by comprising the following steps: the specific process for determining the boundary of the comprehensive energy system to be evaluated comprises the following steps: the boundary comprises the input and the output of the comprehensive energy system to be evaluated, the input of the comprehensive energy system to be evaluated comprises natural gas input quantity and power supply input quantity, and the output of the comprehensive energy system to be evaluated comprises power supply output quantity, cold supply output quantity and heat supply output quantity.
3. An integrated energy system according to claim 2
The efficiency evaluation method is characterized by comprising the following steps: the method comprises the steps of obtaining the input and the output of the comprehensive energy system to be evaluated, such as the power supply output quantity, the cold supply output quantity, the heat supply output quantity and the like through a cold meter, a heat meter, an electric meter, a gas meter and a solar illuminometer at the output end and the input end of the comprehensive energy system to be evaluated.
4. An integrated energy system according to claim 1The efficiency evaluation method is characterized by comprising the following steps: the calculation formula of the energy step utilization rate eta is as follows:
wherein E isoeFor outputting electric energy
QoecFor outputting cold
QoehFor outputting heat
EieFor converting input energy
A total value of (d); pieFor input of electric energy
FieFor feeding natural gas
QieFor supplying heat to hot-water pipe networks
GieFor input of steam energy
TieFor inputting solar energy
5. An integrated energy system according to claim 1
The efficiency evaluation method is characterized by comprising the following steps: energy of integrated energy system to be evaluated
The evaluation parameters of the efficiency comprise the energy coefficient of the electric energy in the operation stage of the comprehensive energy system to be evaluated, the density and the specific heat capacity of water at different temperatures, the energy coefficient and the low-order heating value of natural gas, the energy coefficient and the energy conversion value of steam and the radiation temperature of the sun, and the evaluation time interval in the operation stage of the comprehensive energy system to be evaluated is the maximum sampling interval time of the meters of all input and output gateways of the comprehensive energy system to be evaluated.
6. An integrated energy system according to claim 1
The efficiency evaluation method is characterized by comprising the following steps: energy of the integrated energy system to be evaluated
The operation data of the efficiency comprises the natural gas supply quantity, the electric energy supply quantity, the hot water supply quantity, the steam supply quantity, the solar energy supply quantity and the ambient temperature at the input end of the comprehensive energy system to be evaluated, and the power supply quantity, the cooling supply quantity and the heating supply quantity at the output end.
7. Comprehensive energy system
The efficiency evaluation system is characterized in that: the method comprises the following steps:
the boundary determining module is configured to determine the boundary of the comprehensive energy system to be evaluated;
energy of
An efficiency determination module configured to determine an energy of the integrated energy system to be evaluated based on a boundary of the integrated energy system to be evaluated
An efficiency calculation formula;
a setting module configured to set an energy of the integrated energy system to be evaluated
An efficiency evaluation parameter;
the operation calculation module is configured to acquire the operation data of the comprehensive energy system to be evaluated and calculate the energy of the comprehensive energy system to be evaluated at a determined time interval by using the operation data of the comprehensive energy system to be evaluated
Calculating to obtain the energy of the comprehensive energy system to be evaluated
Efficiency.
8. An integrated energy system according to claim 7
The efficiency evaluation system is characterized in that: said energy being
An efficiency determination module comprising:
for outputting electric energy
A calculation module configured to calculate the output electrical energy
Of cold output
A computing module configured to compute output coldness
For discharging heat
A calculation module configured to calculate an output heat quantity
Conversion of input energy
Is configured to calculate an input energy conversion
A total value of (d);
input of electric energy
A calculation module configured to calculate input electrical energy
For introducing natural gas
A calculation module configured to calculate an input natural gas
For inputting heat into hot-water pipe network
A calculation module configured to calculate an input heat of the hot water pipe network
With input of steam energy
A calculation module configured to calculate an input steam energy source
Inputting solar energy
A calculation module configured to calculate input solar energy
9. A computer-readable storage medium characterized by: in which are stored instructions adapted to be loaded by a processor of a terminal device and to execute an integrated energy system according to any one of claims 1 to 6
And (3) an efficiency evaluation method.
10. A terminal device is characterized in that: the system comprises a processor and a computer readable storage medium, wherein the processor is used for realizing instructions; computer readable storage medium for storing a plurality of instructions adapted to be loaded by a processor and to execute an integrated energy system according to any of claims 1-6
And (3) an efficiency evaluation method.
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