CN103216402B - Active adjusting and controlling system and method for water feeding-heating light-coal complementary power station under varied work condition - Google Patents
Active adjusting and controlling system and method for water feeding-heating light-coal complementary power station under varied work condition Download PDFInfo
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Abstract
The invention discloses an active adjusting and controlling system and method for a water feeding-heating light-coal complementary power station under a varied work condition. The system comprises a lens field, a first temperature sensor, a first controller, an oil pump, an oil tank, a first shunt, a solar adjusting and controlling device, a reducing valve, a second temperature sensor, a second controller, a water pump, a water tank, a steam-water heat exchanger, an original steam-pumping water-feeding heater, a second shunt and an oil-water heat exchanger. When irradiation intensity is equal to a design value, heat transfer oil heats the fed water in a heat returning system to the temperature needed by a boiler outlet; when the irradiation intensity is larger than the design value, the heat transfer oil is shunted in the solar adjusting and controlling device for radiating, and high-pressure water in the solar adjusting and controlling device is heated to high temperature; when the irradiation intensity is smaller than the design value, the high-pressure water in the solar adjusting and the controlling device becomes overheated steam by the reducing valve, releases potential heat to heat a part of the fed water at the steam-water heat exchanger, and flows back to a water returning box after condensation. The active adjusting and controlling system and method solve the problem of low annual average solar power generation efficiency of the light-coal complementary power station under the varied work condition.
Description
Technical field
The present invention relates to solar energy and fossil energy complemental power-generation technical field, particularly relate to the variable working condition active control system in the complementary power station of a kind of feedwater heating light-coal.
Background technology
The pattern that solar energy and fossil energy complementation utilize effectively can improve the problem of environmental pollution of coal-burning power plant, and by ripe conventional power generation usage technology, reduces adjoint technology and economic risk when developing solar energy.Such as application number be 200810104285.8 application for a patent for invention propose and utilize the hydrophobic of feed-water heater in solar energy heating heat regenerative system, water heater heat release is returned to after becoming steam, application number be 200810104848.3 application for a patent for invention propose and utilize the direct heating boiler feed water of solar energy, application number be 200810104849.8 application for a patent for invention propose splitter section heat regenerative system feedwater enter solar thermal collector generating steam, inject the boiler feedwater of feed-water heater heating residue, steam can be saved with upper type to draw gas, effective increase system goes out merit, and without the need to accumulation of energy, only need reduce situation according to solar irradiation and reduce the feedwater flow entered in solar thermal collector in good time, enable original extracted steam from turbine and all the other heats are provided.
Above scheme is carried out mainly for complementary power station design conditions, but when solar irradiation off-design value, complementary system is in the state of variable parameter operation, system off-design value, and confluent and the steam turbine amount of drawing gas at different levels change frequent in feed-water heater, be unfavorable for the stable operation of steam turbine and heat regenerative system, the regulator control system of the complementary power station variable parameter operation that current this solar energy is combined with fossil fuel and method also there is not yet reports for work.In addition, when solar irradiation is greater than design load, cannot effectively utilize the heat collected more, part Jing Chang can only be made to leave unused, waste the Jing Chang and good irradiation resource that involve great expense, effectively cannot reduce the cost of electricity-generating of solar energy further.
Therefore, how regulator control system, under realizing variable working condition, efficient stable runs, namely ensure that the stable and clean generated output of solar energy of the generated output of complementary system under variable working condition is close to design load, realize fully effectively utilizing of solar energy resources, the important technological problems that the urgent need becoming solar energy and thermal power station's complementary technology solves simultaneously.
Summary of the invention
(1) technical problem that will solve
In view of this, main purpose of the present invention is the variable working condition active control system and method providing the complementary power station of a kind of feedwater heating light-coal, system no longer passive dependence extracted steam from turbine heating boiler feed water under low irradiation, but utilize high irradiation solar heat to compensate low irradiation solar heat, continue to replace steam turbine to draw gas, making complementary electrical stand in solar energy, to become under irradiation generating efficiency stable close to design conditions, thus solve current solar heat power generation system variable working condition thermal performance difference and the low technical bottleneck of average annual generating efficiency.
(2) technical scheme
For achieving the above object, the invention provides the variable working condition active control system in the complementary power station of a kind of feedwater heating light-coal, it is characterized in that, this system comprises mirror field 1, first temperature sensor 2, first controller 3, oil pump 4, oil tank 5, first current divider 6, solar energy modulator 7, pressure-reducing valve 8, second temperature sensor 9, second controller 10, water pump 11, water tank 12, vapor-water heat exchanger 13, former bled steam feed heater 14, second current divider 15 and oil water heat exchange device 16, wherein:
Mirror field 1, first controller 3 controls to enter mirror field 1 conduction oil flow according to the conduction oil outlet temperature that the first temperature sensor 2 shows is sent in conduction oil pressurization in oil tank 5 by oil pump 4, ensures that mirror field 1 outlet temperature is constant;
When solar irradiation intensity equals design load, conduction oil all enters oil-water-to-water heat exchanger 16 after absorbing solar temperature rising, feedwater is heated to boiler inlet requirement water temperature;
When solar irradiation intensity is higher than design load, heat conduction flow in mirror field 1 increases, the conduction oil increased enters solar energy modulator 7 heat release, and the pressurization of water tank 12 water is sent into heat absorption in solar energy modulator 7 by water pump 11, and all the other conduction oils still enter oil-water-to-water heat exchanger 16 heated feed water;
When solar irradiation intensity is lower than design load, mirror field 1 conduction oil flow reduces, and all enter oil-water-to-water heat exchanger 16 heat release, simultaneously, solar energy modulator mesohigh water becomes superheated steam through pressure-reducing valve 8 step-down, enter steam water heat exchanger 13, jointly add the boiler feedwater in thermo-power station heat regenerative system with oil-water-to-water heat exchanger 16, reflow tank 12 after superheated steam condensation.
In such scheme, described solar energy modulator 7 is for making up to the operating mode lower than design irradiation by the solar heat higher than design irradiation, also can at utmost substitute original steam-turbine under realizing low radiation parameter to draw gas, this is a kind of active control mode, instead of going control system to run by the passive change steam turbine amount of drawing gas again, the active control of this variable working condition can ensure that the clean generating efficiency of system solar energy is close to design conditions.
In such scheme, the second temperature sensor 9 is equipped with in described solar energy modulator 7 outlet, during solar irradiation off-design value, the high-pressure water outlet temperature change water pump 11 outlet valve aperture size that second controller 10 shows according to the second temperature sensor 9, discharge on regulation and control water tank 12, ensures that solar energy modulator 7 outlet temperature is constant.When solar irradiation intensity is higher than design load, the upper water yield from water tank 12 to solar energy modulator 7 increases, and liquid level rises.When solar irradiation intensity is lower than design load, water tank 12 stops upper water, and solar energy modulator 7 mesohigh water constantly consumes, and liquid level declines.
In such scheme, described steam water heat exchanger 13 is in parallel with oil-water-to-water heat exchanger 16, runs with all the other feed-water heater 14 serial or parallel connections in the heat regenerative system of power station.
In such scheme, described steam water heat exchanger 13 adopts original steam to draw gas heated feed water, when post sunset or this regulator control system break down before sunrise, opens steam in time and draws gas, ensure the normal work of heat regenerative system, improve security reliability.
For achieving the above object, the invention provides the variable working condition active control method in the complementary power station of a kind of feedwater heating light-coal, the method comprises:
When irradiation intensity equals design load, conduction oil absorbs heat in parabolic trough type solar energy mirror field, and the feedwater in heat regenerative system is heated to boiler inlet and requires temperature by heat release in oil-water-to-water heat exchanger;
When irradiation intensity is higher than design load, in solar energy mirror field, conduction oil flow increases, and the conduction oil of increase branches to heat release in solar energy modulator, and the heat absorption of solar energy modulator mesohigh water heats up;
When irradiation intensity is lower than design load, solar energy modulator mesohigh water becomes superheated steam through pressure-reducing valve, substitutes original steam-turbine and draws gas, in the feedwater of steam water heat exchanger release Topography part, and reflow tank after condensation.
In such scheme, the second temperature sensor (9) is equipped with in described solar energy modulator (7) outlet, during solar irradiation off-design value, high-pressure water outlet temperature change water pump (11) the outlet valve aperture size that second controller (10) shows according to the second temperature sensor (9), the upper discharge of regulation and control water tank (12), ensures that solar energy modulator (7) outlet temperature is constant.
In such scheme, when solar irradiation intensity is higher than design load, the upper water yield from water tank (12) to solar energy modulator (7) increases, and liquid level rises.
In such scheme, when solar irradiation intensity is lower than design load, water in water tank (12) stopping, solar energy modulator (7) mesohigh water constantly consumes, and liquid level declines.
In such scheme, described steam water heat exchanger (13) is in parallel with oil-water-to-water heat exchanger (16), runs with all the other feed-water heaters (14) serial or parallel connection in the heat regenerative system of power station.
In such scheme, described steam water heat exchanger (13) adopts original steam to draw gas heated feed water, when post sunset or this regulator control system break down before sunrise, opens steam in time and draws gas, ensure the normal work of heat regenerative system, improve security reliability.
(3) beneficial effect
As can be seen from technique scheme, the present invention has following beneficial effect:
1, utilize the present invention, when solar irradiation intensity is lower than design load, do not need to reactivate former coal fired power plant steam-turbine and draw gas, complementary system generating efficiency and power output are still close to design load.
2, utilize the present invention, achieve the maximum using of solar energy resources, the average daily generating efficiency of solar energy is close to the maximum of design conditions.
3, utilize the present invention, during solar energy variable working condition, do not need frequent variations steam-turbine to draw gas, ensure that the stable operation of steam turbine.
4, utilize the present invention, avoid solar irradiation when being greater than design load, partial mirror leaves unused, and is conducive to making full use of of solar energy mirror field.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the variable working condition active control system in the complementary power station of feedwater heating light-coal according to the embodiment of the present invention;
Wherein Reference numeral is: 1-Jing Chang; 2-first temperature sensor; 3-first controller; 4-oil pump; 5-oil tank; 6-first current divider; 7-solar energy modulator; 8-pressure-reducing valve; 9-second temperature sensor; 10-second controller; 11-water pump; 12-water tank; 13-steam water heat exchanger; The former bled steam feed heater of 14-; 15-second current divider; 16-oil-water-to-water heat exchanger.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
The variable working condition active control system and method in the complementary power station of feedwater heating light provided by the invention-coal, under design radiation parameter, namely when irradiation intensity equals design load, conduction oil absorbs heat in parabolic trough type solar energy mirror field, heat release in oil-water-to-water heat exchanger, is heated to boiler inlet by the feedwater in heat regenerative system and requires temperature; When irradiation intensity is higher than design load, in solar energy mirror field, conduction oil flow increases, and the conduction oil of increase branches to heat release in solar energy modulator, and the heat absorption of solar energy modulator mesohigh water heats up; When irradiation intensity is lower than design load, solar energy modulator mesohigh water becomes superheated steam through pressure-reducing valve, substitutes original steam-turbine and draws gas, in the feedwater of steam water heat exchanger release Topography part, and reflow tank after condensation.
As shown in Figure 1, Fig. 1 is the schematic diagram of the variable working condition active control system in the complementary power station of feedwater heating light-coal according to the embodiment of the present invention, and this system comprises: mirror field 1, first temperature sensor 2, first controller 3, oil pump 4, oil tank 5, first current divider 6, solar energy modulator 7, pressure-reducing valve 8, second temperature sensor 9, second controller 10, water pump 11, water tank 12, steam water heat exchanger 13, former bled steam feed heater 14, second current divider 15 and oil-water-to-water heat exchanger 16.
Wherein, described solar energy modulator 7 is for making up to the operating mode lower than design irradiation by the solar heat higher than design irradiation, also can at utmost substitute original steam-turbine under realizing low radiation parameter to draw gas, this is a kind of active control mode, instead of going control system to run by the passive change steam turbine amount of drawing gas again, the active control of this variable working condition can ensure that the clean generating efficiency of system solar energy is close to design conditions.
China's western region such as the ground solar energy resourceses such as Ningxia enrich, and select the conventional Coal-fired Thermal Power station of local 200MW to carry out complementation transformation.In the present embodiment, annual irradiation intensity 610W/m is chosen
2as Irradiation Design value, what Jing Chang adopted is parabolic trough type solar thermal collector, replaces this thermal power station's first order steam and draws gas and need solar energy to provide heat 21.3MW, need mirror scene to amass about 58200m
2.
Mirror field 1, first controller 3 enters mirror field 1 conduction oil flow according to the conduction oil outlet temperature control that the first temperature sensor 2 show is sent in the conduction oil pressurization of 250 DEG C in oil tank 5 by oil pump 4, ensure outlet temperature constant be 300 DEG C.
When irradiation intensity equals design load 610W/m
2time, high temperature heat conductive oil all enters heat release in oil-water-to-water heat exchanger 16, heat regenerative system feedwater is heated to 245 DEG C from 218 DEG C, is then cooled to 250 DEG C and gets back to oil tank 5.
When irradiation intensity is greater than design load 610W/m
2time, the solar thermal energy of mirror field 1 increases, and for ensureing that mirror field 1 outlet temperature perseverance is 300 DEG C, the first controller 3 control oil pump 4 valve opening strengthens, and conduction oil flow increases.The high temperature heat conductive oil increased enters solar energy modulator 7 heat release, water in water tank 12 is forced into 65bar by water pump 11, send into the heat absorption of solar energy modulator 7 and be warming up to 280 DEG C, second controller 10 controls according to the high-pressure water outlet temperature that the second temperature sensor 9 shows the water yield entering solar energy modulator, ensures that high-pressure water outlet temperature constant is 280 DEG C.Along with irradiation intensity increases, the liquid level of solar energy modulator 7 rises.All the other high temperature heat conductive oils still enter heat release in oil-water-to-water heat exchanger 16, heat regenerative system feedwater is heated to 245 DEG C from 218 DEG C, is then cooled to 250 DEG C and gets back to oil tank 5.
When irradiation intensity is less than design load 610W/m
2time, the solar thermal energy of mirror field 1 reduces, and for ensureing that mirror field 1 outlet temperature perseverance is 300 DEG C, the first controller 3 control oil pump 4 valve opening reduces, and conduction oil flow reduces.High temperature heat conductive oil all enters heat release in oil-water-to-water heat exchanger 16, is then cooled to 250 DEG C and gets back to oil tank 5.Meanwhile, open pressure-reducing valve 8,65bar/280 DEG C of high-temperature water in solar energy modulator 7 becomes 60bar/280 DEG C of superheated steam, and inject steam water heat exchanger 13 and discharge latent heat, feeding water heat regenerative system from 218 DEG C together with oil-water-to-water heat exchanger 16 is heated to 245 DEG C.The condensed water becoming 230 DEG C after superheated steam heat release flows into water tank 12.Along with irradiation intensity declines, the liquid level of solar energy modulator 7 declines.
Post sunset before sunrise, or when this regulator control system breaks down, steam water heat exchanger 13 still can adopt original steam to draw gas heated feed water.
Steam water heat exchanger 13 and oil-water-to-water heat exchanger 16 run with all the other feed-water heater 14 serial or parallel connections in the heat regenerative system of power station.
Based on the variable working condition active control system in the complementary power station of the feedwater heating light shown in Fig. 1-coal, present invention also offers the variable working condition active control method in the complementary power station of a kind of feedwater heating light-coal, the method comprises the following steps: under design radiation parameter, namely when irradiation intensity equals design load, conduction oil absorbs heat in parabolic trough type solar energy mirror field, heat release in oil-water-to-water heat exchanger, is heated to boiler inlet by the feedwater in heat regenerative system and requires temperature; When irradiation intensity is higher than design load, in solar energy mirror field, conduction oil flow increases, and the conduction oil of increase branches to heat release in solar energy modulator, and the heat absorption of solar energy modulator mesohigh water heats up; When irradiation intensity is lower than design load, solar energy modulator mesohigh water becomes superheated steam through pressure-reducing valve, substitutes original steam-turbine and draws gas, in the feedwater of steam water heat exchanger release Topography part, and reflow tank after condensation.
Wherein, the second temperature sensor 9 is equipped with in described solar energy modulator 7 outlet, during solar irradiation off-design value, the high-pressure water outlet temperature change water pump 11 outlet valve aperture size that second controller 10 shows according to the second temperature sensor 9, discharge on regulation and control water tank 12, ensures that solar energy modulator 7 outlet temperature is constant.When solar irradiation intensity is higher than design load, the upper water yield from water tank 12 to solar energy modulator 7 increases, and liquid level rises.When solar irradiation intensity is lower than design load, water tank 12 stops upper water, and solar energy modulator 7 mesohigh water constantly consumes, and liquid level declines.Described steam water heat exchanger 13 is in parallel with oil-water-to-water heat exchanger 16, runs with all the other feed-water heater 14 serial or parallel connections in the heat regenerative system of power station.Described steam water heat exchanger 13 adopts original steam to draw gas heated feed water, when post sunset or this regulator control system break down before sunrise, opens steam in time and draws gas, ensure the normal work of heat regenerative system, improve security reliability.
For the complementary power station not having regulator control system, annual solar irradiation subaverage 610W/m
2, when heat-collecting capacity is less than water supply point calorific requirement 21.3MW in first order feed-water heater, need to enable this grade of original steam and to draw gas common heated feed water, the system of reducing goes out merit, reduces the clean generating efficiency of solar energy, and the amount of drawing gas need according to irradiation change real-time change.And irradiation is greater than mean value 610W/m
2, need again adjustment member Jing Chang to make it out of focus when heat-collecting capacity is greater than 21.3MW, avoid boiler inlet to feed water overheated.The clean generating efficiency of solar energy annual is 20.5%.
And adopt active control method of the present invention, irradiation can be greater than 610W/m
2the solar thermal energy that the Jing Chang of period collects more is for making up lower than 610W/m
2period in energy shortage, realize replacing the first order from sun to sun in the time period as far as possible completely and draw gas.Like this, complementary system can run under still maintaining design conditions during design load in solar irradiation intensity, ensure maximum go out merit and the clean generating efficiency of solar energy.By this regulation and control, the clean generating efficiency of solar energy annual can be made to reach 28.0%.Meanwhile, complementary power station achieves to run continuously and stablize and merit.Before sunrise, post sunset System recover is to original system, switches to this grade of original steam completely and draws gas and carry out heat supply.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the variable working condition active control system in the complementary power station of feedwater heating light-coal, it is characterized in that, this system comprises Jing Chang (1), first temperature sensor (2), first controller (3), oil pump (4), oil tank (5), first current divider (6), solar energy modulator (7), pressure-reducing valve (8), second temperature sensor (9), second controller (10), water pump (11), water tank (12), steam water heat exchanger (13), former bled steam feed heater (14), second current divider (15) and oil-water-to-water heat exchanger (16), wherein:
Conduction oil pressurization in oil tank (5) is sent into Jing Chang (1) by oil pump (4), first controller (3) controls according to the conduction oil outlet temperature that the first temperature sensor (2) shows the conduction oil flow entering Jing Chang (1), ensures that Jing Chang (1) outlet temperature is constant;
When solar irradiation intensity equals design load, conduction oil all enters oil-water-to-water heat exchanger (16) after absorbing solar temperature rising, feedwater is heated to boiler inlet requirement water temperature;
When solar irradiation intensity is higher than design load, Jing Chang (1) heat conduction flow increases, the conduction oil increased enters solar energy modulator (7) heat release, the pressurization of water tank (12) water is sent into heat absorption in solar energy modulator (7) by water pump (11), and all the other conduction oils still enter oil-water-to-water heat exchanger (16) heated feed water;
When solar irradiation intensity is lower than design load, Jing Chang (1) conduction oil flow reduces, and all enter oil-water-to-water heat exchanger (16) heat release, simultaneously, solar energy modulator mesohigh water becomes superheated steam through pressure-reducing valve (8) step-down, enter steam water heat exchanger (13), jointly add the boiler feedwater in thermo-power station heat regenerative system with oil-water-to-water heat exchanger (16), reflow tank (12) after superheated steam condensation.
2. the variable working condition active control system in the complementary power station of feedwater heating light according to claim 1-coal, it is characterized in that, the second temperature sensor (9) is equipped with in described solar energy modulator (7) outlet, during solar irradiation off-design value, high-pressure water outlet temperature change water pump (11) the outlet valve aperture size that second controller (10) shows according to the second temperature sensor (9), the upper discharge of regulation and control water tank (12), ensures that solar energy modulator (7) outlet temperature is constant.
3. the variable working condition active control system in the complementary power station of feedwater heating light according to claim 2-coal, it is characterized in that, when solar irradiation intensity is higher than design load, the upper water yield from water tank (12) to solar energy modulator (7) increases, and liquid level rises.
4. the variable working condition active control system in the complementary power station of feedwater heating light according to claim 2-coal, it is characterized in that, when solar irradiation intensity is lower than design load, water in water tank (12) stopping, solar energy modulator (7) mesohigh water constantly consumes, and liquid level declines.
5. the variable working condition active control system in the complementary power station of feedwater heating light according to claim 1-coal, it is characterized in that, described steam water heat exchanger (13) is in parallel with oil-water-to-water heat exchanger (16), and runs with all the other feed-water heaters (14) serial or parallel connection in the heat regenerative system of power station.
6. the variable working condition active control system in the complementary power station of feedwater heating light according to claim 1-coal, it is characterized in that, described steam water heat exchanger (13) adopts original steam to draw gas heated feed water, before post sunset to sunrise or when this regulator control system breaks down, timely unlatching steam draws gas, ensure the normal work of heat regenerative system, improve security reliability.
7. the variable working condition active control method in the complementary power station of feedwater heating light-coal, be applied to the system according to any one of claim 1 to 6, the method comprises:
When irradiation intensity equals design load, conduction oil absorbs heat in parabolic trough type solar energy mirror field, and the feedwater in heat regenerative system is heated to boiler inlet and requires temperature by heat release in oil-water-to-water heat exchanger;
When irradiation intensity is higher than design load, in solar energy mirror field, conduction oil flow increases, and the conduction oil of increase branches to heat release in solar energy modulator, and the heat absorption of solar energy modulator mesohigh water heats up;
When irradiation intensity is lower than design load, solar energy modulator mesohigh water becomes superheated steam through pressure-reducing valve, substitutes original steam-turbine and draws gas, in the feedwater of steam water heat exchanger release Topography part, and reflow tank after condensation.
8. the variable working condition active control method in the complementary power station of feedwater heating light according to claim 7-coal, it is characterized in that, the second temperature sensor (9) is equipped with in described solar energy modulator (7) outlet, during solar irradiation off-design value, high-pressure water outlet temperature change water pump (11) the outlet valve aperture size that second controller (10) shows according to the second temperature sensor (9), the upper discharge of regulation and control water tank (12), ensures that solar energy modulator (7) outlet temperature is constant.
9. the variable working condition active control method in the complementary power station of feedwater heating light according to claim 7-coal, it is characterized in that, when solar irradiation intensity is higher than design load, the upper water yield from water tank (12) to solar energy modulator (7) increases, and liquid level rises.
10. the variable working condition active control method in the complementary power station of feedwater heating light according to claim 7-coal, it is characterized in that, when solar irradiation intensity is lower than design load, water in water tank (12) stopping, solar energy modulator (7) mesohigh water constantly consumes, and liquid level declines.
The variable working condition active control method in the complementary power station of 11. feedwater heating light according to claim 7-coal, it is characterized in that, described steam water heat exchanger (13) is in parallel with oil-water-to-water heat exchanger (16), and runs with all the other feed-water heaters (14) serial or parallel connection in the heat regenerative system of power station.
The variable working condition active control method in the complementary power station of 12. feedwater heating light according to claim 7-coal, it is characterized in that, described steam water heat exchanger (13) adopts original steam to draw gas heated feed water, before post sunset to sunrise or when this regulator control system breaks down, timely unlatching steam draws gas, ensure the normal work of heat regenerative system, improve security reliability.
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| CN111241711B (en) * | 2020-02-19 | 2021-12-28 | 西安交通大学 | Photoelectric conversion efficiency optimization control method for light-coal complementary system variable working condition |
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| US20080034757A1 (en) * | 2005-05-27 | 2008-02-14 | Skowronski Mark J | Method and system integrating solar heat into a regenerative rankine cycle |
| WO2009062103A1 (en) * | 2007-11-09 | 2009-05-14 | Markron Technologies, Llc | Solar thermal hybridization of a fossil fired rankine cycle |
| CN101261001A (en) * | 2008-04-17 | 2008-09-10 | 华北电力大学 | Solar energy assisted coal fired thermal power plant integrated backheating device |
| DE102009056707A1 (en) * | 2009-04-18 | 2010-10-21 | Alstom Technology Ltd. | Steam power plant with solar collectors |
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| CN202468182U (en) * | 2012-01-18 | 2012-10-03 | 中国科学院工程热物理研究所 | Variable-working-condition active control system of water feed heating type light-coal complementation power station |
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