CN104089435A - Energy saving amount determination method for recycling waste heat of circulating cooling water by means of heat pump - Google Patents
Energy saving amount determination method for recycling waste heat of circulating cooling water by means of heat pump Download PDFInfo
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- CN104089435A CN104089435A CN201410310146.6A CN201410310146A CN104089435A CN 104089435 A CN104089435 A CN 104089435A CN 201410310146 A CN201410310146 A CN 201410310146A CN 104089435 A CN104089435 A CN 104089435A
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- cooling water
- condenser
- heat pump
- unit
- energy saving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention relates to an energy saving amount determination method for recycling waste heat of circulating cooling water by means of a heat pump. The method includes the step (1) of determining the amount of waste heat absorbed by the heat pump from circulating cooling water of a condenser, the step (2) of determining the decreased amount of unit electricity generation power after pressure of the condenser is improved, and the step (3) of determining the energy saving amount of waste heat generated when the heat pump is utilized to recycle circulating cooling water of the condenser. The heat pump is used for recycling waste heat of circulating cooling water of the condenser to heat circulating water of a heating network, losses of a cold source of a steam turbine are reduced, external heating loads are increased, consumption of fire coal is reduced, and the purpose of energy saving is achieved. The energy saving amount of waste heat, recycled by the heat pump, of circulating cooling water of the condenser is calculated successfully by means of system analysis, the through is rigorous, calculation is scientific, and the method has great significance in improvement on recovery efficiency of waste heat and the waste heat recovery process.
Description
Technical field
The invention belongs to thermal power generation field of energy-saving technology, especially a kind of amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat is determined method.
Background technology
Steam turbine cold source energy is one of topmost loss in Present Thermal Power factory therrmodynamic system, accounts for 40% left and right of the total caloric receptivity of unit, and energy loses in vain owing to not making full use of greatly.Along with the aggravation of competition among enterprises and increasingly strict energy-saving and emission-reduction and environmental requirement, further reduce steam turbine cold source energy, fuel saving consumes, reduce disposal of pollutants, utilize absorption heat pump to carry out waste heat recovery to turbine condenser recirculated cooling water, the external heating load of unit can be increased, the object of energy-saving and emission-reduction can be reached again.But there is no complete computational methods for the concrete numerical value of amount of energy saving that utilizes absorption heat pump to reclaim condenser circulating cooling water afterheat.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, determine method and propose a kind of amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat.
The present invention solves its technical problem and takes following technical scheme to realize:
The amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat is determined a method, it is characterized in that comprising that step is as follows:
(1) heat pump absorbs determining of waste heat amount from condenser recirculated cooling water; Determine that the formula using is:
M
y＝Q
in·(H
out-H
in)＝Q
in·[f(P
out，T
out)-f(P
in，T
in)]
In formula: M
yfor the waste heat amount that heat pump absorbs from condenser recirculated cooling water, kW; Q
infor condenser recirculated cooling water water supply flow, t/h, Q in system
in=Q
out; H
outfor condenser cooling water return enthalpy, kJ/kg, can pass through its pressure P
outand temperature T
outtable look-up and obtain; H
infor condenser recirculated cooling water water supply enthalpy, kJ/kg, can pass through its pressure P
inand temperature T
intable look-up and obtain;
(2) promote determining of unit generation power reduction after condenser pressure; Determine that formula is:
ΔN＝N×(P
1-P
0)×η
In formula: Δ N is unit generation power reduction after lifting condenser pressure, kW; N is unit generation acc power, kW; P
1for the condenser pressure after promoting, kPa; P
0condenser pressure during for normal operation, kPa;
ηfor condenser pressure changes the correction factor to set generator power influences, %/kPa;
(3) utilize heat pump to reclaim determining of condenser circulating cooling water afterheat amount of energy saving, determine that formula is:
G＝(M
y×κ-ΔN×τ)×h
Wherein, utilize heat pump to reclaim condenser circulating cooling water afterheat amount of energy saving and represent with the form of standard coal,
In formula: G is for utilizing heat pump to reclaim condenser circulating cooling water afterheat amount of energy saving, ton/year; κ is the average heat supply coal consumption of unit, g/MJ; τ is the average net coal consumption rate of unit, g/ (kW.h); H is unit year hours of operation, hour.
And each data volume all comes from unit DCS system data in timing statistics section in described step (1) formula.
And the source of each data volume is respectively in described step (2) formula:
1. unit generation acc power N comes from unit DCS system data in timing statistics section;
2. the condenser pressure P after promoting
1come from unit DCS system data in timing statistics section;
3. the condenser pressure P while normally operation
0come from unit history data;
4. condenser pressure variation comes from unit design description to the correction factor η of set generator power influences.
And the source of each data volume is respectively in described step (3) formula:
1. the average heat supply coal consumption of unit κ is historical statistical data;
2. the average net coal consumption rate τ of unit is historical statistical data;
3. unit year hours of operation h is historical statistical data.
Advantage of the present invention and good effect are:
The present invention utilizes absorption heat pump to reclaim condenser circulating cooling water afterheat for heating heat supply network recirculated water, reduces the cold source energy of steam turbine, increases external heating load simultaneously, reduces coal-fired consumption, reaches energy-conservation object.The present invention, by network analysis, successfully realizes utilizing heat pump to reclaim the calculating of condenser circulating cooling water afterheat amount of energy saving, and thinking is rigorous, computational science, and the organic efficiency to waste heat and the process modification of waste heat recovery are all significant.
Brief description of the drawings
Fig. 1 is that the present invention utilizes heat pump to reclaim condenser circulating cooling water afterheat system architecture schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention process is further described, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
The amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat is determined a method, as shown in Figure 1, utilizes heat pump to reclaim condenser circulating cooling water afterheat system and comprises condenser and heat pump, and this step of determining method is as follows:
(1) heat pump absorbs determining of waste heat amount from condenser recirculated cooling water; Determine that the formula using is:
M
y＝Q
in·(H
out-H
in)＝Q
in·[f(P
out，T
out)-f(P
in，T
in)]
In formula: M
yfor the waste heat amount that heat pump absorbs from condenser recirculated cooling water, kW; Q
infor condenser recirculated cooling water water supply flow, t/h, as shown in Figure 1, Q in system
in=Q
out(Q
outfor condenser cooling water return flow); H
outfor condenser cooling water return enthalpy, kJ/kg, can pass through its pressure P
outand temperature T
outtable look-up and obtain (with function f (P
out, T
out) represent); H
infor condenser recirculated cooling water water supply enthalpy, kJ/kg, can pass through its pressure P
inand temperature T
intable look-up and obtain (with function f (P
in, T
in) represent),
In formula, the source of each data volume is respectively:
1. condenser recirculated cooling water water supply flow Q
income from unit DCS system data in timing statistics section;
2. condenser cooling water return pressure P
outcome from unit DCS system data in timing statistics section;
3. condenser cooling water return temperature T
outcome from unit DCS system data in timing statistics section;
4. condenser recirculated cooling water pressure of supply water P
income from unit DCS system data in timing statistics section;
5. condenser recirculated cooling water supply water temperature T
income from unit DCS system data in timing statistics section;
(2) promote determining of unit generation power reduction after condenser pressure; Determine that formula is:
Reclaim the benefit of condenser circulating cooling water afterheat for improving heat pump, generally need to take the method that improves condenser pressure (unit vacuum) to improve condenser cooling water return temperature, this measure meeting reduces set generator power under identical operating mode, and after lifting condenser pressure, unit generation power reduction computing formula is as follows:
ΔN＝N×(P
1-P
0)×η
In formula: Δ N is unit generation power reduction after lifting condenser pressure, kW; N is unit generation acc power, kW; P
1for the condenser pressure after promoting, kPa; P
0condenser pressure during for normal operation, kPa; η is that condenser pressure changes the correction factor to set generator power influences, %/kPa.
In formula, the source of each data volume is respectively:
1. unit generation acc power N comes from unit DCS system data in timing statistics section;
2. the condenser pressure P after promoting
1come from unit DCS system data in timing statistics section;
3. the condenser pressure P while normally operation
0come from unit history data;
4. condenser pressure variation comes from unit design description to the correction factor η of set generator power influences.
(3) utilize heat pump to reclaim determining of condenser circulating cooling water afterheat amount of energy saving, determine that formula is:
In the present invention, utilize heat pump to reclaim condenser circulating cooling water afterheat amount of energy saving to represent with the form of standard coal,
G＝(M
y×κ-ΔN×τ)×h
In formula: G is for utilizing heat pump to reclaim condenser circulating cooling water afterheat amount of energy saving, ton/year; κ is the average heat supply coal consumption of unit, g/MJ; τ is the average net coal consumption rate of unit, g/ (kW.h); H is unit year hours of operation, hour.
In computing formula, the source of each data volume is respectively:
1. the average heat supply coal consumption of unit κ is historical statistical data;
2. the average net coal consumption rate τ of unit is historical statistical data;
3. unit year hours of operation h is historical statistical data.
Example
For a concrete condenser recirculated cooling water water supply flow Q
in=7800t/h; Condenser cooling water return pressure P
out=0.12MPa, return water temperature T
out=42.8 DEG C, condenser cooling water return H
out=179.3kJ/kg; Condenser recirculated cooling water pressure of supply water P
out=0.28MPa, supply water temperature T
out=16.7 DEG C, condenser recirculated cooling water water supply H
out=70.3kJ/kg, system, utilize step (1) formula calculate,
(1) heat pump absorbs determining of waste heat amount from condenser recirculated cooling water;
M
y＝Q
in·(H
out-H
in)＝Q
in·[f(P
out，T
out)-f(P
in，T
in)]
As calculated, the waste heat amount that heat pump absorbs from condenser recirculated cooling water is 236166kW;
(2) promote determining of unit generation power reduction after condenser pressure; Calculate by following formula:
ΔN＝N×(P
1-P
0)×η
In formula: set generator power average value N=250000kW; Condenser pressure P after lifting
1=9.5kPa; Condenser pressure P when normal operation
0=4.1kPa; Condenser pressure changes the correction factor η=0.35%/kPa to set generator power influences.
As calculated, after lifting condenser pressure, unit generation power reduction is 4725kW;
(3) utilize heat pump to reclaim determining of condenser circulating cooling water afterheat amount of energy saving; Calculate by following formula:
G＝(M
y×κ-ΔN×τ)×h
In formula: the average heat supply coal consumption of unit κ=40g/MJ; The average net coal consumption rate τ=340g/ of unit (kW.h); Unit year hours of operation h=2800 hour.
As calculated, utilize heat pump to reclaim condenser circulating cooling water afterheat and save mark coal amount G=2850 ton/year.
Claims (4)
1. the amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat is determined a method, it is characterized in that comprising that step is as follows:
(1) heat pump absorbs determining of waste heat amount from condenser recirculated cooling water; Determine that the formula using is:
M
y＝Q
in·(H
out-H
in)＝Q
in·[f(P
out，T
out)-f(P
in，T
in)]
In formula: M
yfor the waste heat amount that heat pump absorbs from condenser recirculated cooling water, kW; Q
infor condenser recirculated cooling water water supply flow, t/h, Q in system
in=Q
out; H
outfor condenser cooling water return enthalpy, kJ/kg, can pass through its pressure P
outand temperature T
outtable look-up and obtain; H
infor condenser recirculated cooling water water supply enthalpy, kJ/kg, can pass through its pressure P
inand temperature T
intable look-up and obtain;
(2) promote determining of unit generation power reduction after condenser pressure; Determine that formula is:
ΔN＝N×(P
1-P
0)×η
In formula: Δ N is unit generation power reduction after lifting condenser pressure, kW; N is unit generation acc power, kW; P
1for the condenser pressure after promoting, kPa; P
0condenser pressure during for normal operation, kPa; η is that condenser pressure changes the correction factor to set generator power influences, %/kPa;
(3) utilize heat pump to reclaim determining of condenser circulating cooling water afterheat amount of energy saving, determine that formula is:
G＝(M
y×κ-ΔN×τ)×h
Wherein, utilize heat pump to reclaim condenser circulating cooling water afterheat amount of energy saving and represent with the form of standard coal,
In formula: G is for utilizing heat pump to reclaim condenser circulating cooling water afterheat amount of energy saving, ton/year; κ is the average heat supply coal consumption of unit, g/MJ; τ is the average net coal consumption rate of unit, g/ (kW.h); H is unit year hours of operation, hour.
2. the amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat according to claim 1 is determined method, it is characterized in that: in described step (1) formula, each data volume all comes from unit DCS system data in timing statistics section.
3. the amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat according to claim 1 is determined method, it is characterized in that: in described step (2) formula, the source of each data volume is respectively:
1. unit generation acc power N comes from unit DCS system data in timing statistics section;
2. the condenser pressure P after promoting
1come from unit DCS system data in timing statistics section;
3. the condenser pressure P while normally operation
0come from unit history data;
4. condenser pressure variation comes from unit design description to the correction factor η of set generator power influences.
4. the amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat according to claim 1 is determined method, it is characterized in that: in described step (3) formula, the source of each data volume is respectively:
1. the average heat supply coal consumption of unit κ is historical statistical data; 2. the average net coal consumption rate τ of unit is historical statistical data; 3. unit year hours of operation h is historical statistical data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410310146.6A CN104089435B (en) | 2014-07-01 | 2014-07-01 | Heat pump is utilized to reclaim the amount of energy saving defining method of circulating cooling water afterheat |
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|---|---|---|---|
| CN201410310146.6A CN104089435B (en) | 2014-07-01 | 2014-07-01 | Heat pump is utilized to reclaim the amount of energy saving defining method of circulating cooling water afterheat |
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|---|---|
| CN104089435A true CN104089435A (en) | 2014-10-08 |
| CN104089435B CN104089435B (en) | 2016-06-08 |
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|---|---|---|---|
| CN201410310146.6A Active CN104089435B (en) | 2014-07-01 | 2014-07-01 | Heat pump is utilized to reclaim the amount of energy saving defining method of circulating cooling water afterheat |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825285A (en) * | 2015-01-08 | 2016-08-03 | 国家电网公司 | Power plant circulating water source absorption-type heat pump energy saving amount determination method |
| CN109740235A (en) * | 2018-12-28 | 2019-05-10 | 新奥数能科技有限公司 | Determine method, apparatus, readable medium and the electronic equipment of coal-burning boiler coal conservation |
| CN110544183A (en) * | 2019-09-19 | 2019-12-06 | 国网天津市电力公司电力科学研究院 | combined heat and power generation unit recovery waste heat benefit calculation method based on absorption heat pump |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007064048A (en) * | 2005-08-30 | 2007-03-15 | Hitachi Eng Co Ltd | Waste heat recovery facility of power plant |
| CN201836967U (en) * | 2010-10-26 | 2011-05-18 | 北京国电电科院节能技术有限公司 | Cogeneration energy saving device utilizing waste heat of direct air cooling unit for heat supply |
| CN203010751U (en) * | 2012-12-25 | 2013-06-19 | 李同强 | Heat-supply device utilizing waste heat of biomass power plant |
-
2014
- 2014-07-01 CN CN201410310146.6A patent/CN104089435B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007064048A (en) * | 2005-08-30 | 2007-03-15 | Hitachi Eng Co Ltd | Waste heat recovery facility of power plant |
| CN201836967U (en) * | 2010-10-26 | 2011-05-18 | 北京国电电科院节能技术有限公司 | Cogeneration energy saving device utilizing waste heat of direct air cooling unit for heat supply |
| CN203010751U (en) * | 2012-12-25 | 2013-06-19 | 李同强 | Heat-supply device utilizing waste heat of biomass power plant |
Non-Patent Citations (4)
| Title |
|---|
| 王吉翔等: "烟气余热回收装置应用实例", 《节能工程》 * |
| 赵虎等: "利用吸收式热泵回收电厂循环水余热的方案研究", 《电力科学与工程》 * |
| 郭艳飞: "某热电厂循环水源吸收式特泵技术节能量测试", 《2012电力通信管理暨智能电网通信技术论坛论文集》 * |
| 魏子萱: "节能技术评价与应用", 《中国学位论文全文数据库》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825285A (en) * | 2015-01-08 | 2016-08-03 | 国家电网公司 | Power plant circulating water source absorption-type heat pump energy saving amount determination method |
| CN109740235A (en) * | 2018-12-28 | 2019-05-10 | 新奥数能科技有限公司 | Determine method, apparatus, readable medium and the electronic equipment of coal-burning boiler coal conservation |
| CN109740235B (en) * | 2018-12-28 | 2022-11-29 | 新奥数能科技有限公司 | Method and device for determining coal saving amount of coal-fired boiler, readable medium and electronic equipment |
| CN110544183A (en) * | 2019-09-19 | 2019-12-06 | 国网天津市电力公司电力科学研究院 | combined heat and power generation unit recovery waste heat benefit calculation method based on absorption heat pump |
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Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant after: State Grid Corporation of China Applicant after: State Grid Tianjin Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: State Grid Tianjin Electric Power Company |
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