CN108644858A - A kind of gas and steam combined cycle cogeneration unit heat consumption distribution method - Google Patents
A kind of gas and steam combined cycle cogeneration unit heat consumption distribution method Download PDFInfo
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- CN108644858A CN108644858A CN201810478409.2A CN201810478409A CN108644858A CN 108644858 A CN108644858 A CN 108644858A CN 201810478409 A CN201810478409 A CN 201810478409A CN 108644858 A CN108644858 A CN 108644858A
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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
- F24D1/00—Steam central heating systems
- F24D1/02—Steam central heating systems operating with live steam
-
- 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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1003—Arrangement or mounting of control or safety devices for steam heating systems
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of gas and steam combined cycle cogeneration unit heat consumption distribution methods, are related to Gas Steam Turbine Combined Cycle Technology field, the present invention includes the following steps：SS01 data collections obtain steam power plant's total fuel consumption, unit Kg/h；Fuel low heat valve, unit KJ/Kg, the heat that steam power plant externally confesses, unit KJ/h；The heat that user needs
Description
Technical field
The invention belongs to Gas Steam Turbine Combined Cycle Technology fields, more particularly to a kind of fuel gas-steam combined cycle heat
Coproduction unit heat consumption distribution method.
Background technology
Combined cycle gas-steam turbine is to improve the thermal efficiency in thermal power plant by a relatively large margin, and pollution problem is made to be solved
Certainly, the clean combustion for promoting coal, is promising generation technology, and Combined cycle gas-steam turbine unit stand-alone device efficiency carries
In the case that height is more and more difficult, the efficiency of therrmodynamic system is improved, must just accomplish energy cascade utilization, it is each to make full use of
The thermal energy of grade improves the efficiency of whole system.
Heat supply after hot steam in gas and steam combined cycle cogeneration unit first generates electricity needs to consider to set when in use
Standby heat consumption carries out reasonable distribution, to improve the utilization rate of fuel, in addition to according to the index of production electric energy, it is necessary to consider
The index of thermal energy is produced, the determination so as to cause cogeneration of heat and power heat consumption index is complex.
Invention content
The purpose of the present invention is to provide a kind of gas and steam combined cycle cogeneration unit heat consumption distribution methods, pass through
The total heat consumption of steam power plant is allocated by the quantity of two kinds of products of production than row in embodiment one, by being pressed in embodiment two
The work(that coproduction heat supply steam extraction steam flow is done less in steam turbine accounts for the practical ratio done work of initial steam to distribute the total heat consumption of heat supply, leads to
It crosses the work(done less in steam turbine in coproduction heat supply steam extraction steam flow in embodiment three and accounts for the practical ratio done work of initial steam to distribute confession
The total heat consumption of heat, solves the problems, such as that existing gas and steam combined cycle cogeneration unit heat consumption is difficult to distribute.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
The present invention is a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, is included the following steps：
SS01 data collections：Obtain steam power plant's total fuel consumption, unit Kg/h；
Fuel low heat valve, unit KJ/Kg；
The heat that steam power plant externally confesses, unit KJ/h；
The heat that user needs, unit KJ/h；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption in terms of heat supply is, unit KJ/h, in formula
For heat supply network efficiency, heat supply network efficiency indicates the radiation loss of central heating network；
The calculation formula for distributing to the heat consumption in terms of power generation is, unit KJ/h.
Further, a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, includes the following steps：
SS01 data collections：Obtain steam power plant's total fuel consumption, unit Kg/h；
Fuel low heat valve, unit KJ/Kg；
Thermal power plant cogeneration hot steam amount, unit KJ/h；
Steam turbine hot steam amount, unit KJ/h；
Heating steam specific enthalpy, unit KJ/Kg；
Steam turbine air inlet specific enthalpy, unit KJ/kg；
Steam turbine air inlet specific enthalpy, unit KJ/kg；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption of coproduction heat supply is, unit KJ/h；
The calculation formula of the heating load of temperature-decreased pressure reducer is, unit KJ/h；
In formula,For temperature-decreased pressure reducer heating steam amount, unit kg/h；
For the specific enthalpy of temperature-decreased pressure reducer steam supply, unit KJ/kg；
The specific enthalpy of water, unit KJ/kg are returned for temperature-decreased pressure reducer heat supply network；
Then the calculation formula of the total heat consumption of heat supply is, unit KJ/h；
The calculation formula for total heat consumption that generates electricity is。
Further, a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, includes the following steps：
SS01 data collections：Obtain thermal power plant cogeneration hot steam amount, unit KJ/h；
Steam turbine hot steam amount, unit KJ/h；
The ratio fire of initial steam is used, unit KJ/Kg；
The ratio fire of heat supply steam extraction is used, unit KJ/Kg；
Environment temperature, unit K；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption in terms of heat supply is：
, unit KJ/h；
In formulaFor the specific entropy of initial steam, unit KJ/（kg·K）；
For the specific entropy of heat supply steam extraction, unit KJ/（kg·K）.
Further, further comprising the steps of：
SS03 cost calculations：Fuel cost apportionment than calculation formula be；
In formula：For for thermal energy,For generated energy；
Fuel used to generate electricity cost sharing than calculation formula be。
The invention has the advantages that：
1, the present invention is allocated by the way that the total heat consumption of steam power plant is compared row by the quantity of two kinds of products of production in embodiment one,
The practical ratio done work of initial steam is accounted for by the work(done less in steam turbine in coproduction heat supply steam extraction steam flow in embodiment two to distribute
The total heat consumption of heat supply, accounts for that initial steam is practical to be done by the work(done less in steam turbine by coproduction heat supply steam extraction steam flow in embodiment three
The ratio of work(distributes the total heat consumption of heat supply, according to the heat consumption rate found out reaches best to control the allocation proportion of heat consumption
Proportioning, improve the generating efficiency of steam power plant.
2, the present invention obtains the optimum proportioning of fuel by the fuel calculation formula in SS03, can match and fire according to heat consumption
Material proportioning is combined to control allocation proportion, improves the utilization rate of fuel, achievees the effect that energy-efficient.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
All other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
Embodiment one
The present invention is a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, is included the following steps：
SS01 data collections：Obtain steam power plant's total fuel consumption, unit Kg/h；
Fuel low heat valve, unit KJ/Kg；
The heat that steam power plant externally confesses, unit KJ/h；
The heat that user needs, unit KJ/h；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption in terms of heat supply is, unit KJ/h, in formula
For heat supply network efficiency, heat supply network efficiency indicates the radiation loss of central heating network；
The calculation formula for distributing to the heat consumption in terms of power generation is, unit KJ/h；
SS03 cost calculations：Fuel cost apportionment than calculation formula be；
In formula：For for thermal energy,For generated energy；
Fuel used to generate electricity cost sharing than calculation formula be。
Embodiment two
The present invention is a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, is included the following steps：
SS01 data collections：Obtain steam power plant's total fuel consumption, unit Kg/h；
Fuel low heat valve, unit KJ/Kg；
Thermal power plant cogeneration hot steam amount, unit KJ/h；
Steam turbine hot steam amount, unit KJ/h；
Heating steam specific enthalpy, unit KJ/Kg；
Steam turbine air inlet specific enthalpy, unit KJ/kg；
Steam turbine air inlet specific enthalpy, unit KJ/kg；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption of coproduction heat supply is, unit KJ/h；
The calculation formula of the heating load of temperature-decreased pressure reducer is, unit KJ/h；
In formula,For temperature-decreased pressure reducer heating steam amount, unit kg/h；
For the specific enthalpy of temperature-decreased pressure reducer steam supply, unit KJ/kg；
The specific enthalpy of water, unit KJ/kg are returned for temperature-decreased pressure reducer heat supply network；
Then the calculation formula of the total heat consumption of heat supply is, unit KJ/h；
The calculation formula for total heat consumption that generates electricity is；
SS03 cost calculations：Fuel cost apportionment than calculation formula be；
In formula：For for thermal energy,For generated energy；
Fuel used to generate electricity cost sharing than calculation formula be
Embodiment three
The present invention is a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, is included the following steps：
SS01 data collections：Obtain thermal power plant cogeneration hot steam amount, unit KJ/h；
Steam turbine hot steam amount, unit KJ/h；
The ratio fire of initial steam is used, unit KJ/Kg；
The ratio fire of heat supply steam extraction is used, unit KJ/Kg；
Environment temperature, unit K；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption in terms of heat supply is：
, unit KJ/h；
In formulaFor the specific entropy of initial steam, unit KJ/（kg·K）；
For the specific entropy of heat supply steam extraction, unit KJ/（kg·K）；
SS03 cost calculations：Fuel cost apportionment than calculation formula be；
In formula：For for thermal energy,For generated energy；
Fuel used to generate electricity cost sharing than calculation formula be
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means to combine
The embodiment or example particular features, structures, materials, or characteristics described be contained at least one embodiment of the present invention or
In example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.And
And particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples with suitable
Mode combine.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the present invention
Principle and practical application, to enable skilled artisan to be best understood by and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (4)
1. a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, it is characterised in that：Include the following steps：
SS01 data collections：Obtain steam power plant's total fuel consumption, unit Kg/h；
Fuel low heat valve, unit KJ/Kg；
The heat that steam power plant externally confesses, unit KJ/h；
The heat that user needs, unit KJ/h；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption in terms of heat supply is, unit KJ/h, in formulaFor
Heat supply network efficiency, heat supply network efficiency indicate the radiation loss of central heating network；
The calculation formula for distributing to the heat consumption in terms of power generation is, unit KJ/h.
2. a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, it is characterised in that：Include the following steps：
SS01 data collections：Obtain steam power plant's total fuel consumption, unit Kg/h；
Fuel low heat valve, unit KJ/Kg；
Thermal power plant cogeneration hot steam amount, unit KJ/h；
Steam turbine hot steam amount, unit KJ/h；
Heating steam specific enthalpy, unit KJ/Kg；
Steam turbine air inlet specific enthalpy, unit KJ/kg；
Steam turbine air inlet specific enthalpy, unit KJ/kg；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption of coproduction heat supply is, unit KJ/h；
The calculation formula of the heating load of temperature-decreased pressure reducer is, unit KJ/h；
In formula,For temperature-decreased pressure reducer heating steam amount, unit kg/h；
For the specific enthalpy of temperature-decreased pressure reducer steam supply, unit KJ/kg；
The specific enthalpy of water, unit KJ/kg are returned for temperature-decreased pressure reducer heat supply network；
Then the calculation formula of the total heat consumption of heat supply is, unit KJ/h；
The calculation formula for total heat consumption that generates electricity is。
3. a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method, it is characterised in that：Include the following steps：
SS01 data collections：Obtain thermal power plant cogeneration hot steam amount, unit KJ/h；
Steam turbine hot steam amount, unit KJ/h；
The ratio fire of initial steam is used, unit KJ/Kg；
The ratio fire of heat supply steam extraction is used, unit KJ/Kg；
Environment temperature, unit K；
SS02 data calculate：The calculation formula of heat consumption is in steam power plant, unit KJ/h；
The calculation formula for distributing to the heat consumption in terms of heat supply is：
, unit KJ/h；
In formulaFor the specific entropy of initial steam, unit KJ/（kg·K）；
For the specific entropy of heat supply steam extraction, unit KJ/（kg·K）.
4. a kind of gas and steam combined cycle cogeneration unit heat consumption distribution method according to claim 1-3, is also wrapped
Include following steps：
SS03 cost calculations：Fuel cost apportionment than calculation formula be；
In formula：For for thermal energy,For generated energy；
Fuel used to generate electricity cost sharing than calculation formula be。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110738394A (en) * | 2019-09-17 | 2020-01-31 | 广西电网有限责任公司电力科学研究院 | heating unit thermoelectric ratio calculation method considering energy quality coefficient |
| CN111507011A (en) * | 2020-04-26 | 2020-08-07 | 国电南京电力试验研究有限公司 | Method for correcting influence quantity of heat supply extraction steam on sliding pressure operation of steam turbine |
| CN112507534A (en) * | 2020-11-25 | 2021-03-16 | 山东电力研究院 | Conversion method and system for power supply coal consumption rate of cogeneration unit in heat supply period |
-
2018
- 2018-05-18 CN CN201810478409.2A patent/CN108644858A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 叶涛，张燕平主编: "《热力发电厂》", 31 July 2016 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110738394A (en) * | 2019-09-17 | 2020-01-31 | 广西电网有限责任公司电力科学研究院 | heating unit thermoelectric ratio calculation method considering energy quality coefficient |
| CN110738394B (en) * | 2019-09-17 | 2021-04-13 | 广西电网有限责任公司电力科学研究院 | Heat supply unit thermoelectric ratio calculation method considering energy quality coefficient |
| CN111507011A (en) * | 2020-04-26 | 2020-08-07 | 国电南京电力试验研究有限公司 | Method for correcting influence quantity of heat supply extraction steam on sliding pressure operation of steam turbine |
| CN112507534A (en) * | 2020-11-25 | 2021-03-16 | 山东电力研究院 | Conversion method and system for power supply coal consumption rate of cogeneration unit in heat supply period |
| CN112507534B (en) * | 2020-11-25 | 2022-07-19 | 国网山东省电力公司电力科学研究院 | Conversion method and system for power supply coal consumption rate of cogeneration unit in heat supply period |
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