CN104965984A - Calculation method for carbon dioxide emission reduction amount of natural gas distributed energy system - Google Patents
Calculation method for carbon dioxide emission reduction amount of natural gas distributed energy system Download PDFInfo
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- CN104965984A CN104965984A CN201510357872.8A CN201510357872A CN104965984A CN 104965984 A CN104965984 A CN 104965984A CN 201510357872 A CN201510357872 A CN 201510357872A CN 104965984 A CN104965984 A CN 104965984A
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Abstract
The present invention discloses a calculation method for a carbon dioxide emission reduction amount of a natural gas distributed energy system. The method comprises the following steps of: S1, counting up a secondary product amount output by the distributed energy system; S2, calculating a primary product amount needing to be consumed by the secondary product amount, which is counted up in the S1 and output by the distributed energy system; S3, calculating the carbon dioxide emission amount of the distributed energy system according to the primary product amount; and S4, calculating the carbon dioxide emission reduction amount of the natural gas distributed energy system. According to the calculation method provided by the present invention, the carbon dioxide emission reduction amount of the natural gas distributed energy system can be relatively accurately calculated; and with the adoption of the method, compared with the emission reduction amount of coal-fire power plants and gas-fire power plants, the carbon dioxide emission reduction amount of the natural gas distributed energy system can be clearly analyzed, so that the popularization and extension of the natural gas distributed energy system is facilitated and the method takes an active part in environmental protection.
Description
Technical field
The present invention relates to NG Distributed Energy System, particularly relate to a kind of NG Distributed Energy System carbon dioxide emission reduction amount computing method.
Background technology
Distributed energy resource system is the energy resource system of relatively traditional centralized energy supply, traditional centralized energy supplying system adopts large capacity equipment, centralized production, then gives numerous users interior in a big way by special conveying facility (bulk power grid, large heat supply network etc.) by various Energy transfer; Distributed energy resource system is then direct user oriented, and produce on the spot and supplying energy by the demand of user, have several functions, the medium and small energy conversion that can meet multiple target utilizes system.
And the advantage such as NG Distributed Energy System has that comprehensive energy utilization factor is high, stable, safe and reliable, energy-saving and emission-reduction, pollution are little, become the effective means alleviating contradictory relation between industrial development and environmental protection.But not a kind of computing method being applicable to the carbon dioxide emission reduction amount of NG Distributed Energy System.
Summary of the invention
The object of the invention is to, a kind of NG Distributed Energy System carbon dioxide emission reduction amount computing method are provided, the discharge capacity of NG Distributed Energy System carbon dioxide can be calculated comparatively accurately, thus calculate the CER of NG Distributed Energy System carbon dioxide compared with coal-burning power plant or plant gas.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of NG Distributed Energy System carbon dioxide emission reduction amount computing method, comprise the following steps:
S1, the afterproduct amount that statistical cloth energy resource system exports;
S2, Computation distribution formula energy resource system exports the primary production amount that S1 adds up the consumption of gained afterproduct amount needs;
S3, calculates the CO2 emissions of distributed energy resource system according to primary production gauge;
S4, calculates the carbon dioxide emission reduction amount of NG Distributed Energy System;
Wherein, afterproduct refers to the product that NG Distributed Energy System is outwards supplied; Primary production refers to NG Distributed Energy System and produces the energy that described afterproduct will consume.
In aforesaid NG Distributed Energy System carbon dioxide emission reduction amount computing method, the carbon dioxide emission reduction amount that S4 calculates NG Distributed Energy System also comprises the steps:
S41, calculates the CO2 emissions that coal-burning power plant exports primary production amount.
In aforesaid NG Distributed Energy System carbon dioxide emission reduction amount computing method, the carbon dioxide emission reduction amount that S4 calculates NG Distributed Energy System also comprises the steps:
S42, calculates the CO2 emissions that plant gas exports primary production amount.
In aforesaid NG Distributed Energy System carbon dioxide emission reduction amount computing method, the CO2 emissions that S3 calculates distributed energy resource system according to primary production gauge also comprise the steps:
S31, exports the amount of carbon dioxide of the electric energy discharge in primary production amount, exports according to carbon emission criterion calculation the amount of carbon dioxide that in primary production amount, heat energy is discharged according to carbon emission criterion calculation.
Compared with prior art; the present invention can calculate the CO2 emissions of NG Distributed Energy System comparatively accurately; adopt this method clearly can analyze the CER of NG Distributed Energy System compared with coal-burning power plant and plant gas carbon dioxide; be conducive to the popularization of NG Distributed Energy System, popularize, for environmental protection serves positive effect.
Accompanying drawing explanation
Fig. 1 is the workflow diagram of a kind of embodiment of the present invention;
Fig. 2 is the structural representation of a kind of embodiment of the present invention.
Reference numeral: 1-electric refrigerating machine, 2-gas internal-combustion engine, 3-flue gas type lithium bromide machine, 4-gas-steam boiler, 5-plate type heat exchanger, 6-solar water heater, 7-hot water lithium bromide machine.
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Embodiment
Embodiments of the invention 1: are as shown in Figure 2 the structural representations of a kind of embodiment of NG Distributed Energy System, and this NG Distributed Energy System comprises rock gas and sun power two cover system.Wherein, natural gas system comprises gas internal-combustion engine 2 and gas-steam boiler 4, in gas-steam boiler 4, pass into rock gas, and gas-steam boiler 4 produces vapours, and vapours is outwards supplied with the form of heat energy and hot water by plate type heat exchanger 5.The Product Definition of described heat energy and this outside supply of hot water is afterproduct; And produce the energy (described vapours) that described heat energy and hot water (described afterproduct) will consume and be defined as primary production.Pass into rock gas to gas internal-combustion engine 2, gas internal-combustion engine 2 one aspect produces electric energy, and electric energy can directly outwards be supplied with the form of electric load, can also produce cold by electric refrigerating machine, outwards supplies with the form of cold.On the other hand, rock gas produces the jacket water of flue gas and uniform temperature in gas internal-combustion engine 2 combustion, and flue gas is outwards supplied with the form of cold energy or heat energy through flue gas type lithium bromide machine 3; Jacket water then externally provides cold energy or heat energy by hot water lithium bromide machine 7.Solar energy system by the sun power collected by solar water heater 6 with the outside hot-water supply load of the form of hot water, although hot water load is the product of outwards supply, but produce form of energy does not occur hot water load conversion or consumption, so hot water is still primary production.
At present, the method of conventional calculating NG Distributed Energy System carbon dioxide emission reduction amount is all obtained by electric refrigerating machine 1 artificial for all colds thinking, and the Distribution of Natural formula energy project of reality, its cold produced is made up of two parts: the cold energy that the cold energy that electric refrigerating machine 1 provides and flue gas type lithium bromide machine 3 and hot water lithium bromide machine 7 provide.Algorithm before can be considered to high-grade electric energy in the middle of invisible for low-grade heat energy, causes the computing method of this part not have science.
Also there is the skimble-scamble problem of benchmark in algorithm before: first benchmark is aimed at the benchmark of electric energy.By system produce all colds be converted to electric energy after, then with gauge that system generates electricity with, the carbon emission index that acquired results is announced by electrical network converts out CO
2discharge capacity and mark coal consumption amount.Second benchmark is aimed at the benchmark of heat energy.The heat energy provided by distributed energy resource system thinks the heat energy that gas fired-boiler provides, and converts out CO
2discharge capacity and rock gas consumption.So, same project has two benchmarks, is namely benchmark with coal-burning power plant and is benchmark with pipeline for gas.But hot and cold, electricity is that same system produces, and should not treat with a certain discrimination, so should unify benchmark.
Before algorithm calculate carbon dioxide emission reduction amount only have a numerical value, can not be clear and definite distinguish the CO that NG Distributed Energy System produces
2in CER, have and how much caused because fuel there occurs replacement, how much have is because the change of system causes.
These computing method calculate primary production amount by afterproduct gauge, the CO2 emissions of NG Distributed Energy System are calculated based on primary production amount, as shown in Figure 1, a kind of NG Distributed Energy System carbon dioxide emission reduction amount computing method, comprise the following steps:
S1, the afterproduct amount that statistical cloth energy resource system exports;
S2, Computation distribution formula energy resource system exports the primary production amount that S1 adds up the consumption of gained afterproduct amount needs;
S3, calculates the CO2 emissions of distributed energy resource system according to primary production gauge;
S31, exports the amount of carbon dioxide of the electric energy discharge in primary production amount, exports according to carbon emission criterion calculation the amount of carbon dioxide that in primary production amount, heat energy is discharged according to carbon emission criterion calculation.
S41, calculates the CO2 emissions that coal-burning power plant exports primary production amount.
S4, calculates the carbon dioxide emission reduction amount of NG Distributed Energy System;
Wherein, afterproduct refers to the product that NG Distributed Energy System is outwards supplied; Primary production refers to NG Distributed Energy System and produces the energy that described afterproduct will consume.
Embodiment 2: as shown in Figure 1, a kind of NG Distributed Energy System carbon dioxide emission reduction amount computing method, comprise the following steps:
S1, the afterproduct amount that statistical cloth energy resource system exports;
S2, Computation distribution formula energy resource system exports the primary production amount that S1 adds up the consumption of gained afterproduct amount needs;
S3, calculates the CO2 emissions of distributed energy resource system according to primary production gauge;
S31, exports the amount of carbon dioxide of the electric energy discharge in primary production amount, exports according to carbon emission criterion calculation the amount of carbon dioxide that in primary production amount, heat energy is discharged according to carbon emission criterion calculation.
S42, calculates the CO2 emissions that plant gas exports primary production amount.
S4, calculates the carbon dioxide emission reduction amount of NG Distributed Energy System;
Wherein, afterproduct refers to the product that NG Distributed Energy System is outwards supplied; Primary production refers to NG Distributed Energy System and produces the energy that described afterproduct will consume.
Now be described for the NG Distributed Energy System shown in Fig. 2, the heating load of the distributed energy resource system involved by this method mainly comprises six partial contents: one is the heating load of the flue gas type lithium bromide machine of distributed energy resource system; Two is heating loads of the gas-steam boiler of distributed energy resource system; Three is heats that distributed energy resource system flue gas type lithium bromide machine cooling is converted; Four is that distributed energy resource system gas internal-combustion engine jacket water freezes the heat converted; Five is plate type heat exchanger heat supply water yields; Six is solar energy system heat supply water yields.
One, the calculating of heating load
(1). the heating load of the flue gas type lithium bromide machine of distributed energy resource system
Heat
LiBr＝HEO
LiBr÷η
LiBr
In formula: HEO
liBr: the heat that distributed energy resource system flue gas type lithium bromide chiller provides user, ten thousand GJ;
η
liBr: distributed energy resource system flue gas type lithium bromide chiller heating efficiency;
(2). the heating load Heat of the gas fired-boiler of distributed energy resource system
gasboiler
(3). the heat that the refrigeration of the flue gas of distributed energy resource system is converted
Heat
cold-gas＝Cold
gas÷COP
gas-LiBr
In formula: Cold
gas: the refrigerating capacity of distributed energy resource system flue gas, ten thousand GJ;
COP
gas-LiBr: distributed energy resource system flue gas type lithium bromide chiller COP (Energy Efficiency Ratio) value;
(4). the internal combustion engine cylinder jacket water of distributed energy resource system freezes the heat converted
Heat
cold-gtw＝Cold
gtw÷COP
water-LiBr
In formula: Cold
gtw: the refrigerating capacity of distributed energy resource system internal combustion engine cylinder jacket water, ten thousand GJ;
COP
water-LiBr: distributed energy resource system hot water lithium bromide unit COP value;
(5). the heat that the distributed energy resource system heat supply water yield is converted
Heat
hwt＝hwt÷η
LiBr
In formula: hwt: the hot water amount that distributed energy resource system provides user, ten thousand GJ;
(6). solar energy system heat supply water yield heat
solar
(7). the nominal heating load of distributed energy resource system is:
Heat
my＝Heat
LiBr+Heat
gasboiler+Heat
cold-gas+Heat
cold-gtw+Heat
hwt+Heat
solar
Two, the delivery of distributed energy resource system is the generated energy of gas internal-combustion engine
Three, CO
2the calculating of discharge capacity
1, with the comparing of coal-burning power plant
(1). distributed energy resource system CO
2discharge capacity
CO
2,CCHP＝NG×α
CO2,NG
In formula: CO
2, CCHP: distributed energy resource system discharges CO
2amount, tCO
2/ year;
NG: the total amount of the rock gas that distributed energy resource system burns, m
3;
α
cO2, NG: the CO of rock gas
2emission factor, tCO
2/ m
3;
α
CO2,NG＝NCV
NG×F
CO2,NG×OXID
NG
In formula: F
cO2, NG: the CO of per unit energy rock gas
2emission factor, tCO
2/ GJ; This value can be obtained by following approach: 1. determined by fuel providers; 2. locality or national data are taken from; 3. IPCC default value;
OXID
nG: the oxygenation efficiency of rock gas;
(2). the datum line CO of electric power supply
2the calculating of discharge capacity
First this part wants the generating plant of clear and definite comparison to be which kind of other power generation type.This method is using coal unit as comparison other.
CO
2,elec grid＝Coal
ele-my×BEF
elec grid
In formula: BEF
elec grid: electrical network datum line CO
2emission factor, tCO
2/ MWh; This value can by 50% to the marginal emission factor of 50% weight and capacity drain combinations of factors.
(3). the datum line CO of heat supply
2the calculating of discharge capacity
CO
2,heat＝Coal
heat-my×BEFsc
In formula: BEFsc: the CO of per unit mass mark coal
2emission factor, kgCO
2/ kg;
(4). datum line year CO
2discharge capacity
CO
2,normal＝CO
2,elec grid+CO
2,heat
(5). distributed energy resource system CO
2the calculating of CER and reduction of discharging rate
CO
2,jp＝CO
2,normal-CO
2,CCHP
δCO
2＝CO
2,jp÷CO
2,normal
2, with the comparing of plant gas
(1). distributed energy resource system CO
2the calculating of discharge capacity
CO
2,CCHP＝NG×α
CO2,NG
In formula: CO
2, CCHP: distributed energy resource system discharges CO
2amount, tCO
2/ year;
NG: the total amount of the rock gas that distributed energy resource system burns, m
3;
α
cO2, NG: the CO of rock gas
2emission factor, tCO
2/ m
3;
α
CO2,NG＝NCV
NG×F
CO2,NG×OXID
NG
In formula: NCV
nG: the Lower heat value of per unit volume rock gas, GJ/m
3;
F
cO2, NG: the CO of per unit energy rock gas
2emission factor, tCO
2/ GJ; This value can be obtained by following approach: 1. determined by fuel providers; 2. locality or national data are taken from; 3. IPCC default value;
OXID
nG: the oxygenation efficiency of rock gas;
(2). the datum line CO of electric power supply
2the calculating of discharge capacity
First this part wants the generating plant of clear and definite comparison to be which kind of other power generation type.Herein using Gas Generator Set as comparison other.
CO
2,elec grid＝CEO×BEF
elec grid
In formula: CEO: the delivery of distributed energy resource system, MWh/;
BEF
elec grid: electrical network datum line CO
2emission factor, tCO
2/ MWh; This value can by 50% to the marginal emission factor of 50% weight and capacity drain combinations of factors.
(3). the datum line CO of heat supply
2the calculating of discharge capacity
CO
2,heat＝HEO÷NCV
SC÷η
boiler×BEF
sc÷1000
In formula: HEO: the heating load of distributed energy resource system, kJ;
NCV
sC: the Lower heat value of per unit mass mark coal, kJ/kg;
η
boiler: Industrial Boiler efficiency;
BEF
sc: the CO2 emission factor of per unit mass mark coal, kgCO
2/ kg;
(4). distributed energy resource system CO
2the calculating of CER
CO
2,jp＝CO
2,elec grid+CO
2,heat-CO
2,CCHP
Algorithm is before converted by afterproduct amount, but the cold in afterproduct amount comprises the cold produced by electric refrigerating machine 1 and the cold produced by flue gas type lithium bromide machine 3 and hot water lithium bromide machine 7, the cold that electric refrigerating machine 1 produces is produced by the conversion of electric energy, and the cold that flue gas type lithium bromide machine 3 and hot water lithium bromide machine 7 produce is produced by thermal power transfer.Therefore, what algorithm was before artificial thinks that cold all has electric refrigerating machine 1 to produce, and its result of calculation will inevitably exist mistake.And the computing method of this patent with primary production amount for calculating basis, the science more of the algorithm before comparing, the CO2 emissions calculated are also more accurate.Because NG Distributed Energy System comprises solar energy system, by the result of calculation that this algorithm draws, the heat production of solar energy system can not discharge carbon dioxide, therefore, can learn that solar energy system be the contribution margin of reducing emission of carbon dioxide is because the replacing of equipment obtains, and can learn more information from result of calculation by result of calculation.
Claims (4)
1. NG Distributed Energy System carbon dioxide emission reduction amount computing method, is characterized in that, comprise the following steps:
S1, the afterproduct amount that statistical cloth energy resource system exports;
S2, Computation distribution formula energy resource system exports the primary production amount that S1 adds up the consumption of gained afterproduct amount needs;
S3, calculates the CO2 emissions of distributed energy resource system according to primary production gauge;
S4, calculates the carbon dioxide emission reduction amount of NG Distributed Energy System;
Wherein, afterproduct refers to the product that NG Distributed Energy System is outwards supplied; Primary production refers to NG Distributed Energy System and produces the energy that described afterproduct will consume.
2. NG Distributed Energy System carbon dioxide emission reduction amount computing method according to claim 1, is characterized in that, the carbon dioxide emission reduction amount that S4 calculates NG Distributed Energy System also comprises the steps:
S41, calculates the CO2 emissions that coal-burning power plant exports primary production amount.
3. NG Distributed Energy System carbon dioxide emission reduction amount computing method according to claim 1, is characterized in that, the carbon dioxide emission reduction amount that S4 calculates NG Distributed Energy System also comprises the steps:
S42, calculates the CO2 emissions that plant gas exports primary production amount.
4. the NG Distributed Energy System carbon dioxide emission reduction amount computing method according to Claims 2 or 3, is characterized in that, the CO2 emissions that S3 calculates distributed energy resource system according to primary production gauge also comprise the steps:
S31, exports the amount of carbon dioxide of the electric energy discharge in primary production amount, exports according to carbon emission criterion calculation the amount of carbon dioxide that in primary production amount, heat energy is discharged according to carbon emission criterion calculation.
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Address after: 100160 Beijing, Fengtai District Automobile Museum Road, No. 6, Ying Kun century A block, floor 6 Applicant after: Huadian Distributed Energy Engineering & Technology Co., Ltd. Applicant after: China Huadian Engineering (Group) Co., Ltd. Address before: 100160 Beijing, Fengtai District Automobile Museum Road, No. 6, Ying Kun century A block, floor 11 Applicant before: China Huadian Engineering (Group) Co., Ltd. Applicant before: Huadian Distributed Energy Engineering & Technology Co., Ltd. |
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Inventor after: Zhao Zhiyuan Inventor after: Zhao Shengguo Inventor after: Li Binghong Inventor after: Yu Xiuyan Inventor after: Zhao Zhiyuan, Zhao Shengguo, Li Binghong, Yu Xiuyan, Wang Chenxi Inventor before: Zhao Zhiyuan |
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Address after: 100160 Beijing, Fengtai District Automobile Museum Road, No. 6, Ying Kun century A block, floor 6 Applicant after: Huadian Distributed Energy Engineering & Technology Co., Ltd. Applicant after: CHINA HUADIAN ENGINEERING CO., LTD. Address before: 100160 Beijing, Fengtai District Automobile Museum Road, No. 6, Ying Kun century A block, floor 6 Applicant before: Huadian Distributed Energy Engineering & Technology Co., Ltd. Applicant before: China Huadian Engineering (Group) Co., Ltd. |
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