CN112594773B - Heat energy charging method and device - Google Patents

Heat energy charging method and device Download PDF

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CN112594773B
CN112594773B CN202011402461.3A CN202011402461A CN112594773B CN 112594773 B CN112594773 B CN 112594773B CN 202011402461 A CN202011402461 A CN 202011402461A CN 112594773 B CN112594773 B CN 112594773B
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王晓
黄涛
黄维
马亮
来婷
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Shaanxi Qidi Ruixing Clean Energy Research Institute Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
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    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1048—Counting of energy consumption
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F15/00—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity
    • G07F15/08—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity with means for varying the tariff or changing the price
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/044—Flow sensors

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Abstract

According to the heat energy charging method provided by the embodiment of the invention, in the process of supplying heat energy to a power plant within a preset time period, the water supply temperature of a water supply pipe, the return water temperature of a return water pipe, the mass specific heat capacity of hot water, the starting time of the hot water flowing through a flow meter, the ending time of the hot water flowing through the flow meter, the comprehensive correction coefficient of the relative density and the specific heat capacity of the hot water flowing through the flow meter and the unit heat basic heat price are obtained, and then the heat fee settled by the power plant and a heat buyer is calculated. When the embodiment of the invention changes the heating scheme to meet the demand of a heat buying party, the heat cost is changed accordingly. Therefore, the accurate measurement of the heat cost can be achieved according to the heat supply requirements and heat supply schemes of different regions, and the benign development of heat cost measurement in the heat supply industry of China is promoted.

Description

Heat energy charging method and device
Technical Field
The invention belongs to the field of heat supply metering, and particularly relates to a heat energy charging method and device.
Background
The heat energy is an essential energy in modern life and can be converted into electric energy to be used by people or for heating in life. The heat energy is mainly converged by steam heat energy generated by a boiler and heat energy dissipated to the atmosphere by a water cooling tower or an air cooling island through a production mode of cogeneration in a power plant.
There is a process in heat energy follow steam power plant to user's hand, and the steam power plant needs pay for the cost, and the user needs pay according to the heat energy that uses, and the steam power plant needs to charge heat energy. In the charging mode in the prior art, the heat fee is calculated according to the temperature and the flow when the thermal power plant produces or supplies heat energy, and the actual temperature of the heat energy is changed along with the change of time, hot water quality, volume or user requirements, so that the accurate charging of the heat energy cannot be realized by the charging mode.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a thermal energy charging method. The technical problem to be solved by the invention is realized by the following technical scheme:
in a first aspect, a method for charging for thermal energy provided by the present invention includes:
acquiring the water supply temperature of a water supply pipe, the return water temperature of a return water pipe, the mass specific heat capacity of hot water, the starting time of the hot water flowing through a flowmeter, the ending time of the hot water flowing through the flowmeter and the comprehensive correction coefficient of the relative density and the specific heat capacity of the hot water flowing through the flowmeter in the process of supplying heat energy within a preset time period;
acquiring a unit heat basic heat price;
calculating the heat cost of the heat energy by using a heat cost calculation formula based on the water supply temperature, the water return temperature, the mass specific heat capacity of the hot water, the starting time, the ending time, the comprehensive correction coefficient and the unit heat basic heat price;
the heat fee calculation formula is as follows:
Figure BDA0002817390200000021
wherein P represents a heat rate, P0Represents the base heat rate per unit heat, tgIndicating the temperature of water supplied, t, from the water supply pipehThe unit of the return water temperature of a return water pipe of the power plant is; k represents a comprehensive correction coefficient of relative density and specific heat capacity; ρ represents the density of hot water flowing through the flowmeter in kg/m3(ii) a c represents the mass specific heat capacity of hot water, and c is 4178J/(kg. DEG C); q. q.svRepresents the volumetric flow rate of the hot water flowing through the flow meter in m3/s；τ1Represents the starting time of hot water flowing through the heat meter, and the unit is s; tau is2Represents the end time of hot water flowing through the heat meter, and the unit is s; τ denotes a heating period.
In a second aspect, the present invention provides a heat energy and heat charge accounting device, including:
the multi-gradient integral integrating instrument comprises a multi-gradient integral integrating instrument, a first temperature sensor, a second temperature sensor and a flowmeter, wherein the first temperature sensor is arranged on a water supply pipe of the thermal power plant, the second temperature sensor and the flowmeter are arranged on a water return pipe of the thermal power plant, the multi-gradient integral integrating instrument is respectively connected with the first temperature sensor, the second temperature sensor and the flowmeter,
the first temperature sensor is used for collecting the water supply temperature of a water supply pipe in the process of supplying each grade of heat energy within a preset time period and transmitting the water supply temperature to the multi-gradient integral integrator;
the second temperature sensor is used for collecting the return water temperature of a return water pipe in the process that the thermal power plant supplies heat energy of each grade within a preset time period, and transmitting the supply water temperature to the multi-gradient integral integrator;
the flowmeter is used for acquiring the flow rate, the volume flow, the temperature, the starting time, the ending time, the relative density of hot water and the mass specific heat capacity of the hot water flowing through the flowmeter in the process of supplying each grade of heat energy by the thermal power plant within a preset time period;
the multi-gradient integral integrating and integrating instrument is used for calculating the heat charge of the heat energy by using a heat charge calculation formula based on the water supply temperature, the water return temperature, the hot water temperature, the mass specific heat capacity of the hot water, the starting time, the ending time, the comprehensive correction coefficient and the unit heat basic heat price;
the heat fee calculation formula is as follows:
Figure BDA0002817390200000031
wherein P represents a heat rate, P0Represents the base heat rate per unit heat, tgIndicating the temperature of water supplied, t, from the water supply pipehThe unit of the return water temperature of a return water pipe of the power plant is; k represents a comprehensive correction coefficient of relative density and specific heat capacity; rho meterIndicating the density of the hot water flowing through the flowmeter in kg/m3(ii) a c represents the mass specific heat capacity of hot water, and c is 4178J/(kg. DEG C); q. q.svRepresents the volumetric flow rate of the hot water flowing through the flow meter in m3/s，τ1Represents the initial time of hot water flowing through the heat meter in seconds, tau2Represents the end time of hot water flowing through the heat meter in seconds, and tau represents the heating time period.
According to the heat energy charging method provided by the embodiment of the invention, in the process of supplying heat energy within a preset time period, the water supply temperature of a water supply pipe, the water return temperature of a water return pipe, the mass specific heat capacity of hot water, the starting time of hot water flowing through a flowmeter, the ending time of hot water flowing through the flowmeter, the comprehensive correction coefficient of the relative density and the specific heat capacity of hot water flowing through the flowmeter, and the unit heat basic heat price are obtained, and then the heat fee settled by a thermal power plant and a heat buyer is calculated. According to the embodiment of the invention, when the heat supply scheme is changed to meet the demand of a heat buyer, the heat cost is changed, so that the heat supply demand of different regions can be met, and the heat supply cost of the thermal power plant is saved.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a flowchart of a thermal energy charging method according to an embodiment of the present invention;
fig. 2 is a structural diagram of a thermal energy billing device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
As shown in fig. 1, a method for counting heat energy charging heat rate according to an embodiment of the present invention includes:
s1, acquiring the water supply temperature of the water supply pipe, the return water temperature of the return water pipe, the mass specific heat capacity of hot water, the starting time of the hot water flowing through the flowmeter, the ending time of the hot water flowing through the flowmeter and the comprehensive correction coefficient of the relative density and the specific heat capacity of the hot water in the process of supplying heat energy within a preset time period;
the preset time period is set according to actual conditions, and in specific implementation, 1 day can be taken as one time period.
It can be understood that the flow meter is installed on the water return pipe, the hot water flows through the flow meter, and the flow meter can collect a plurality of parameters of the hot water. Exemplary are as follows: start time, etc.
S2, acquiring unit heat basic heat price;
s3, calculating the heat cost of the heat energy by using a heat cost calculation formula based on the water supply temperature, the water return temperature, the mass specific heat capacity, the starting time, the ending time, the comprehensive correction coefficient and the unit heat basic heat price;
the heat fee calculation formula is as follows:
Figure BDA0002817390200000041
wherein P represents a heat rate, P0Represents the base heat rate per unit heat, tgIndicating the temperature of water supplied, t, from the water supply pipehThe unit of the return water temperature of a return water pipe of the power plant is; k represents a comprehensive correction coefficient of relative density and specific heat capacity; ρ represents the density of hot water flowing through the flowmeter in kg/m3(ii) a c represents the mass specific heat capacity of hot water, and c is 4178J/(kg. DEG C); q. q.svRepresents the volumetric flow rate of the hot water flowing through the flow meter in m3/s，τ1Represents the initial time of hot water flowing through the heat meter in seconds, tau2Represents the end time of hot water flowing through the heat meter in seconds, and tau represents the heating time period.
The basic heat price of the unit heat quantity can be determined by the agreement of a thermal power plant and a heat buying party, and the comprehensive correction coefficient of the relative density and the specific heat capacity is the same as the existing value-taking principle, so that the detailed description is omitted.
According to the multi-grade heat energy and heat fee statistical method based on the return water temperature, the water supply temperature of a water supply pipe, the return water temperature of a return water pipe, the temperature of hot water flowing through a flowmeter, the mass specific heat capacity of the hot water, the starting time of the hot water flowing through the flowmeter, the ending time of the hot water flowing through the flowmeter, the comprehensive correction coefficient of the relative density and the specific heat capacity of the hot water flowing through the flowmeter and the unit heat basic heat price are obtained in the process of producing heat energy in a preset time period, and then the heat fee settled by a thermal power plant and a heat buyer is calculated. According to the embodiment of the invention, when the heat supply scheme is changed to meet the demand of a heat buyer, the heat cost is changed, so that the heat supply demand of different regions can be met, and the heat supply cost of the thermal power plant is saved.
Example two
As shown in fig. 2, the device for counting heat rate of multi-grade heat energy based on return water temperature according to the embodiment of the present invention includes: the multi-gradient integral integrating instrument comprises a multi-gradient integral integrating instrument 1, a first temperature sensor 2, a second temperature sensor 3 and a flowmeter 4, wherein the first temperature sensor is arranged on a water supply pipe of a thermal power plant, the second temperature sensor and the flowmeter are arranged on a water return pipe of the thermal power plant, the multi-gradient integral integrating instrument is respectively connected with the first temperature sensor, the second temperature sensor and the flowmeter,
the first temperature sensor is used for collecting the water supply temperature of a water supply pipe in the process of producing each grade heat energy in a preset time period of the thermal power plant and transmitting the water supply temperature to the multi-gradient integral integrator;
the second temperature sensor is used for collecting the return water temperature of the return water pipe in the process of supplying heat energy to the thermal power plant within a preset time period and transmitting the water supply temperature to the multi-gradient integral integrating and integrating instrument;
the flow meter is used for collecting the flow rate, the volume flow rate, the starting time, the ending time, the relative density of hot water and the mass specific heat capacity of the hot water flowing through the flow meter in the process of supplying heat energy in a preset time period;
the multi-gradient integral integrating and integrating instrument is used for calculating the heat charge of the heat energy by using a heat charge calculation formula based on the water supply temperature, the water return temperature, the mass specific heat capacity, the starting time, the ending time, the comprehensive correction coefficient and the unit heat basic heat price;
the heat fee calculation formula is as follows:
Figure BDA0002817390200000061
wherein P represents a heat rate, P0Represents the base heat rate per unit heat, tgIndicating the temperature of water supplied, t, from the water supply pipehThe unit of the return water temperature of a return water pipe of the power plant is; k represents a comprehensive correction coefficient of relative density and specific heat capacity; ρ represents the density of hot water flowing through the flowmeter in kg/m3(ii) a c represents the mass specific heat capacity of hot water, and c is 4178J/(kg. DEG C); q. q.svRepresents the volumetric flow rate of the hot water flowing through the flow meter in m3/s，τ1Represents the initial time of hot water flowing through the heat meter in seconds, tau2Represents the end time of hot water flowing through the heat meter, and is expressed in seconds, and tau represents the heating time period.
EXAMPLE III
It can be understood that the higher the supply water temperature, the higher the plant input cost, the higher the high grade heat energy. The lower the heat energy with low grade, the lower the water supply temperature, the lower the investment cost of the power plant. The lower the return water temperature is, the lower the steam condensate water temperature is, the higher the operation efficiency of the boiler is, and the higher the recovery utilization rate of the low-grade waste heat is. Therefore, the utilization efficiency of heat energy and the cost input need to be comprehensively considered, and therefore the water supply temperature of the water supply pipe and the water return temperature of the water return pipe are factors influencing heat price. The lower the return water temperature is, for a heat buying party, on one hand, the more intense the heat exchange degree is, the higher the heat utilization efficiency is, the smaller the power consumption of the transmission is, and the higher the recovery utilization rate of the low-grade waste heat is; as the heat buying party needs to additionally input the energy station (large temperature difference unit) to reduce the return water temperature, the cost of the heat buying party is increased, the requirements of the heat selling party (power plant) and the heat supply company on the return water temperature are considered, the power plant is encouraged to recycle low-grade heat energy, and only the return water temperature is considered. Therefore, the invention can improve the utilization efficiency of the heat energy of the thermal power plant by introducing the temperature correction coefficient to correct the heat price, thereby reducing the input cost, and simultaneously, the correction of the heat price is also beneficial to reducing the heat purchasing cost of a heat purchasing party.
As an optional embodiment of the present invention, the heat rate after temperature correction can be calculated by obtaining the temperature correction coefficient of the heat energy supplied to each unit product within a predetermined time period and using a temperature correction heat rate calculation formula;
the temperature correction heat cost calculation formula is as follows:
Figure BDA0002817390200000071
wherein, f (t)g，th) The temperature correction coefficient of each grade heat source is shown, and P represents the heat rate after temperature correction.
The method comprises the following steps of obtaining temperature correction coefficients of heat energy supplied to each unit product in different heat supply time periods in a preset time period:
step a: determining the temperature gradient of the return water temperature according to the minimum value and the maximum value of the return water temperature of each grade heat energy;
step b: and determining the temperature correction coefficient of the heat energy of each position product under each temperature step.
As an alternative embodiment of the present invention, the step of determining the temperature step of the return water temperature according to the minimum value and the maximum value of the return water temperature of each grade of heat energy includes:
step a: determining a return water temperature interval based on the maximum value and the minimum value of the return water temperature;
step b: when the return water temperature of the return water pipe is smaller than the minimum value in the return water temperature range, the temperature gradient of the return water temperature of the return pipe is a first gradient;
step c: when the return temperature of the return pipe is within the return water temperature range, the temperature gradient of the return temperature of the return pipe is a second gradient;
step d: and when the return water temperature of the return water pipe is greater than the maximum value in the return water temperature range, the temperature gradient of the return water temperature of the return water pipe is a third gradient.
The backwater temperature interval is a temperature interval consisting of the minimum value and the maximum value of backwater temperatures of different grades of heat energy.
It can be understood that the invention relates the return water temperature t of the power planthThree different steps are divided, which are respectively:
a first step: when the temperature t of the return waterhMinimum value t of return water temperature smaller than different grade heat energyh，minI.e. th＜th，min；
A second step: when the temperature t of the return waterhThe minimum value t of the temperature of the return water is more than or equal to the minimum value t of the heat energy of different gradesh，minAnd is less than or equal to the maximum value t of the return water temperature of different grade heat energyh，maxI.e. th，min≤th≤th，max；
A third step: when the temperature t of the return waterhMaximum value t of return water temperature greater than different grade heat energyh，maxI.e. th＞th，max。
As an alternative embodiment of the present invention, determining the temperature correction coefficient for the thermal energy of the respective bin at each temperature step comprises:
determining a temperature correction coefficient of the heat energy of each position product under each temperature step by using a calculation formula of a temperature correction system, wherein the calculation formula of the temperature correction coefficient is as follows:
Figure BDA0002817390200000081
Figure BDA0002817390200000082
wherein, f (t)h) The temperature correction coefficients of different grades of heat energy when the water supply temperature is constant are shown; piThe unit heat price of different grade heat energy calculated by a thermal power plant and a heat buying party is expressed as element/GJ; t is th，maxMaximum value of return water temperature, t, representing each grade of heat energyh，minRepresents the minimum value of the return water temperature of each grade heat energy.
By calculation of the temperature correction coefficientThe temperature correction coefficient f (t) of the heat energy of different step grades can be obtained by a formulah) Dependent on the temperature t of the return waterhLinearly changing, converting the calculation formula of the temperature correction coefficient to obtain the temperature correction coefficient f (t) of the heat energy of different grade gradesh) The calculation formula is as follows:
Figure BDA0002817390200000091
according to the above calculation formula, the temperature correction coefficient f (t) of the heat energy of different step grades can be determinedg，th)。
Example four
It can be understood that the heat power plant can realize heat supply while generating electricity through the cogeneration unit. Under the influence of electricity utilization habits of users, the load of a 24-hour power grid of a thermal power plant fluctuates at any time every day, and is required by power grid regulation, and when the electricity consumption of the users is reduced and the power grid is in low load, the low load is forced to participate in power grid peak regulation by a cogeneration unit for regulating the generated energy. Because the heat supply capacity and the power supply capacity of the cogeneration unit are coupled, the heat supply capacity of the cogeneration unit is obviously reduced when the power is low-load, so that the heat load cannot meet the demand, and the contradiction that the power supply is greater than the demand and the heating power supply is less than the demand occurs, so that the heat supply time periods are distinguished according to the heat load time tau as a factor influencing the heat price, the contradiction between the heat supply and the demand can be effectively relieved, the heat utilization mode at the user side is effectively changed, and the effect of peak load shifting and valley filling is achieved.
As an optional embodiment of the present invention, the heat charge after time correction may be calculated by obtaining a time correction coefficient for supplying heat energy to each unit article in each heat supply time period within a predetermined time period and using a time correction heat charge calculation formula;
the time correction heat rate calculation formula is as follows:
Figure BDA0002817390200000101
where f (τ) represents a time correction coefficient, and P represents a heat rate after time correction.
As an alternative embodiment of the present invention, the step of obtaining the time correction coefficient for supplying the heat energy of each unit item to each heat supply time interval in the predetermined time interval includes:
step a: dividing a heat supply time period into a peak value time period, a valley value time period and an average value time period based on the change of the heat load;
step b: time correction coefficients for the respective time segments are determined.
The invention proposes to divide the heating time period tau into three different periods according to the thermal load: and respectively charging different time periods in the peak time period, the valley time period and the average time period.
Peak time period τh: when the heat time τ is within the peak period of the thermal load of the plant, i.e., τh1≤τ≤τh2；
Valley period τl: when the heat-using time τ is within the thermal load valley period of the plant, i.e., τl1≤τ≤τl2；
Mean time period τa: when the heat-using time τ is within the heat load leveling period of the plant, i.e., τa1≤τ≤τa2；
As an alternative embodiment of the present invention, the determining the time correction factor of each time segment includes:
determining the time correction coefficient of each time segment by using a calculation formula of the time correction coefficient, wherein the calculation formula of the time correction coefficient is as follows:
Figure BDA0002817390200000102
Figure BDA0002817390200000103
Figure BDA0002817390200000111
wherein the content of the first and second substances,
Figure BDA0002817390200000112
is divided into
Figure BDA0002817390200000113
And
Figure BDA0002817390200000114
τ is τa、τhAnd τl，
Figure BDA0002817390200000115
The average heat load in unit time in the heat load leveling time period is represented, and the unit is GJ/h;
Figure BDA0002817390200000116
the average heat load in unit time in the heat load peak time period is shown, and the unit is GJ/h;
Figure BDA0002817390200000117
the average heat load in unit time in the heat load valley time period is represented, and the unit is GJ/h;
Figure BDA0002817390200000118
representing a flat time period τaThe cumulative thermal load in GJ;
Figure BDA0002817390200000119
representing the peak time period tauhThe cumulative thermal load in GJ;
Figure BDA00028173902000001110
representing a valley period τlThe cumulative thermal load within; the unit is GJ; delta tau is divided into taua1-τa2，τh1-τh2And τl1-τl2。
Converting the calculation formula of the time correction coefficient, wherein the calculation formula of the time correction coefficient is as follows:
Figure BDA00028173902000001111
EXAMPLE five
In order to improve the accuracy of the heat rate statistical calculation, time correction and temperature correction can be performed on the heat rate at the same time.
As an alternative embodiment of the present invention, the corrected heat rate may be calculated using a total correction calculation formula based on the time correction coefficient and the temperature correction coefficient;
the total correction calculation formula is calculated as:
Figure BDA0002817390200000121
the following describes a calculation process of a thermal energy charging method according to an embodiment of the present invention in an example manner of an actual situation.
Example 1
The local heating season of a certain city is 11 months and 15 days to 3 months and 15 days, the heat buying party is a heating power company, the basic heat value is 37.5 yuan/GJ, and the return water temperature thWhen the temperature is higher than 40 ℃, the heat value is the original basic heat value P of the thermal power plant0. When the temperature t of the return waterhBelow 40 deg.C, i.e. water return temperature thWhen the temperature is low, a heat supply company invests a large-temperature-difference heat exchange unit to ensure that the return water temperature t is thThe temperature correction coefficient f (t) is reduced because the heat power company should pay less feeg，th) And is reduced accordingly. The agreement between the thermal power plant and the heating power company is agreed when the return water temperature thWhen the temperature is lower than 10 ℃, in order to make up for the investment cost of a large-temperature-difference heat exchange unit of a heating power company, the temperature correction coefficient f (t) at the momentg，th) The heat company does not pay the heat fee, which is 0.
Therefore, the temperature correction coefficient f (t) of the present inventiong，th) The specific values of (A) are shown as follows:
Figure BDA0002817390200000122
according to the heat energy charging method provided by the embodiment of the invention, the return water temperature t of the power plant is measuredhThree different steps are divided, which are respectively:
a first step: t is th＜40；
A second step: t is not less than 10h≤40；
A third step: t is th＞40。
A first step: when the temperature t of the return waterhThe temperature is less than the minimum value of return water temperature of different grade heat energy agreed by power plants and heat supply companies by 10 ℃, namely th＜10℃；
A second step: when the temperature t of the return waterhThe minimum value of the return water temperature of different grade heat energy agreed by the power plant and the heat supply company is more than or equal to 10 ℃, and the maximum value of the return water temperature of different grade heat energy agreed by the power plant and the heat supply company is less than or equal to 40 ℃, namely t is more than or equal to 10 ≤ th≤40；
A third step: when the temperature t of the return waterhThe maximum value of the return water temperature of different grade heat energy agreed by power plants and heat supply companies is 40 ℃, namely th＞40。
The cost and the return water temperature t of different step grade heat energy produced by the thermal power planthTemperature correction coefficient f (t) of thermovalence with linear changeg，th) Dependent on the temperature t of the return waterhThe unit heat cost of the heat energy with different grades is calculated as follows:
Figure BDA0002817390200000131
by the formula, the temperature correction coefficients f (t) of the heat energy of different step grades can be obtainedg，th) The calculation formula (c) is as follows:
Figure BDA0002817390200000132
the above-mentioned temperature correction for determining different gradesPositive coefficient f (t)g，th) The method can obtain the unit heat cost and the return water temperature t of the heat energy with different step grades in the inventionhTemperature correction coefficient f (t) in linear variationg，th) As shown in table 1 below.
TABLE 1
Figure BDA0002817390200000133
Counting the change situation of the daily 24h heat load in winter in a certain city, and dividing the heat supply time period tau of the normal day into three different time periods according to the heat load of different time periods, as shown in table 2:
TABLE 2
Figure BDA0002817390200000141
According to a calculation formula of the time correction coefficient f (tau) in different time periods tau, the average heat load per unit time in different time periods can be calculated:
Figure BDA0002817390200000142
therefore, the calculation formula of the time correction coefficient f (τ) in different time periods τ is as follows:
Figure BDA0002817390200000143
therefore, the heat rate of the heat energy supplied can be calculated by determining the above parameters according to the heat rate calculation formula of the heat energy supplied to the heat buying party.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (2)

1. A method for charging heat energy is characterized by comprising the following steps:
acquiring the water supply temperature of a water supply pipe, the return water temperature of a return water pipe, the mass specific heat capacity of hot water, the starting time of the hot water flowing through a flowmeter, the ending time of the hot water flowing through the flowmeter and the comprehensive correction coefficient of the relative density and the specific heat capacity of the hot water flowing through the flowmeter in the process of supplying heat energy within a preset time period;
acquiring a unit heat basic heat price and acquiring a time correction coefficient for supplying heat energy to each unit in each heat supply time period in a preset time period;
the time correction coefficient for supplying heat energy to each unit product in each heat supply time period in the pre-acquired time period comprises the following steps:
dividing a heat supply time period into a peak value time period, a valley value time period and an average value time period based on the change of the heat load;
determining the time correction coefficient of each time segment by using a calculation formula of the time correction coefficient, wherein the calculation formula of the time correction coefficient is as follows:
Figure FDA0003546265370000011
Figure FDA0003546265370000012
Figure FDA0003546265370000013
wherein f (tau) represents a time correction coefficient,
Figure FDA0003546265370000014
is divided into
Figure FDA0003546265370000015
And
Figure FDA0003546265370000016
τ is τa、τhAnd τl，
Figure FDA0003546265370000017
The average heat load in unit time in the heat load leveling time period is represented, and the unit is GJ/h;
Figure FDA0003546265370000018
indicating heat is negativeAverage heat load per unit time in the load peak time period, wherein the unit is GJ/h;
Figure FDA0003546265370000019
the average heat load in unit time in the heat load valley time period is represented, and the unit is GJ/h;
Figure FDA00035462653700000110
representing a flat time period τaThe cumulative thermal load in GJ;
Figure FDA00035462653700000111
representing the peak time period tauhThe cumulative thermal load in GJ;
Figure FDA0003546265370000021
representing a valley period τlThe cumulative thermal load within; the unit is GJ; delta tau is divided into taua1-τa2，τh1-τh2And τl1-τl2；
Calculating the heat cost of the heat energy by using a heat cost calculation formula based on the water supply temperature, the water return temperature, the mass specific heat capacity of the hot water, the starting time, the ending time, the comprehensive correction coefficient and the unit heat basic heat price;
the heat fee calculation formula is as follows:
Figure FDA0003546265370000022
wherein P represents a heat rate, P0Represents the base heat rate per unit heat, tgIndicating the temperature of water supplied, t, from the water supply pipehThe unit of the return water temperature of a return water pipe of the power plant is; k represents a comprehensive correction coefficient of relative density and specific heat capacity; ρ represents the density of hot water flowing through the flowmeter in kg/m3(ii) a c represents the mass specific heat capacity of hot water, and c is 4178J/(kg. DEG C); q. q.svIndicating hot water flowing through a flow meterVolume flow of (d) in m3/s；τ1Represents the starting time of hot water flowing through the heat meter, and the unit is s; tau is2Represents the end time of hot water flowing through the heat meter, and the unit is s; τ represents a heating time period;
calculating the heat fee after time correction through a time correction heat fee calculation formula;
the time correction heat rate calculation formula is as follows:
Figure FDA0003546265370000023
2. a thermal energy heat charge statistical apparatus using the thermal energy charge method of claim 1, characterized by comprising: the multi-gradient integral integrating instrument comprises a multi-gradient integral integrating instrument, a first temperature sensor, a second temperature sensor and a flowmeter, wherein the first temperature sensor is arranged on a water supply pipe of the thermal power plant, the second temperature sensor and the flowmeter are arranged on a water return pipe of the thermal power plant, the multi-gradient integral integrating instrument is respectively connected with the first temperature sensor, the second temperature sensor and the flowmeter,
the first temperature sensor is used for collecting the water supply temperature of a water supply pipe in the process of supplying each grade of heat energy within a preset time period and transmitting the water supply temperature to the multi-gradient integral integrator;
the second temperature sensor is used for collecting the return water temperature of a return water pipe in the process that the thermal power plant supplies heat energy of each grade within a preset time period, and transmitting the supply water temperature to the multi-gradient integral integrator;
the flowmeter is used for acquiring the flow rate, the volume flow, the temperature, the starting time, the ending time, the relative density of hot water and the mass specific heat capacity of the hot water flowing through the flowmeter in the process of supplying each grade of heat energy by the thermal power plant within a preset time period;
the multi-gradient integral integrating and integrating instrument is used for obtaining time correction coefficients for supplying heat energy to each unit in each heat supply time period in a preset time period;
the time correction coefficient for supplying heat energy to each unit product in each heat supply time period in the pre-acquired time period comprises the following steps:
dividing a heat supply time period into a peak value time period, a valley value time period and an average value time period based on the change of the heat load;
determining the time correction coefficient of each time segment by using a calculation formula of the time correction coefficient, wherein the calculation formula of the time correction coefficient is as follows:
Figure FDA0003546265370000031
Figure FDA0003546265370000032
Figure FDA0003546265370000033
wherein f (tau) represents a time correction coefficient,
Figure FDA0003546265370000034
is divided into
Figure FDA0003546265370000035
And
Figure FDA0003546265370000036
τ is τa、τhAnd τl，
Figure FDA0003546265370000037
The average heat load in unit time in the heat load leveling time period is represented, and the unit is GJ/h;
Figure FDA0003546265370000038
representing the average heat load per unit time over the period of peak heat loadThe unit is GJ/h;
Figure FDA0003546265370000039
the average heat load in unit time in the heat load valley time period is represented, and the unit is GJ/h;
Figure FDA0003546265370000041
representing a flat time period tauaThe cumulative thermal load in GJ;
Figure FDA0003546265370000042
representing the peak time period tauhThe cumulative thermal load in GJ;
Figure FDA0003546265370000043
representing a valley period τlThe cumulative thermal load within; the unit is GJ; delta tau is divided into taua1-τa2，τh1-τh2And τl1-τl2；
The multi-gradient integral integrating and integrating instrument is used for calculating the heat charge of the heat energy by using a heat charge calculation formula based on the water supply temperature, the water return temperature, the hot water temperature, the mass specific heat capacity of the hot water, the starting time, the ending time, the comprehensive correction coefficient and the unit heat basic heat price;
the heat fee calculation formula is as follows:
Figure FDA0003546265370000044
wherein P represents a heat rate, P0Represents the base heat rate per unit heat, tgIndicating the temperature of water supplied, t, from the water supply pipehThe unit of the return water temperature of a return water pipe of the power plant is; k represents a comprehensive correction coefficient of relative density and specific heat capacity; ρ represents the density of hot water flowing through the flowmeter in kg/m3(ii) a c represents the mass specific heat capacity of hot water, and c is 4178J/(kg. DEG C); q. q.svIndicating the volume of hot water flowing through the flow meterFlow rate in m3/s，τ1Represents the initial time of hot water flowing through the heat meter in seconds, tau2The unit of the end time of the hot water flowing through the heat meter is second, and tau represents the heating time period;
calculating the heat fee after time correction through a time correction heat fee calculation formula;
the time correction heat rate calculation formula is as follows:
Figure FDA0003546265370000045
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CN104864482A (en) * 2014-11-22 2015-08-26 青岛同创节能环保工程有限公司 Energy-saving metering and controlling device for building heat supply
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