A regenerative energy cold start system for a gas steam combined cycle

Abstract

The application discloses a renewable energy cold start system for a gas-steam combined cycle, which comprises a renewable energy heat collecting and taking device and a molten salt heat storage flash device; the renewable energy heat collecting and taking device comprises a molten salt heater and a renewable energy heat device, and the heat absorption side working medium circulation pipeline of the molten salt heater is connected with the renewable energy heat device; the molten salt heat storage flash device comprises a low-temperature molten salt tank, a high-temperature molten salt tank and a flash evaporator arranged on the heat release side working medium circulation pipeline of the molten salt heater; the steam-water side of the flash evaporator is connected with a waste heat boiler and a steam turbine of a gas-steam combined cycle unit through a unit preheating circulation pipeline; the system utilizes solar energy heat collection, deep geothermal energy heat taking, heats molten salt storage, releases the heat storage before the cold start of the combined cycle unit, flashes the unit feed water, prepares warm-up steam, saves the start-up boiler fuel and plant power, promotes the decoupling of the gas turbine and the steam-water system in the unit start-up process, and greatly improves the optimization effect of the unit cold start.

Description

Technical Field

[0001] This invention relates to the field of renewable energy utilization technology, specifically to a renewable energy cold start system for a gas-steam combined cycle. Background Technology

[0002] With the increasing installed capacity of new energy power generation, gas turbine combined cycle power generation technology, which features rapid start-up and flexible adjustment, has been rapidly developed to support grid peak shaving and frequency regulation. As the mainstay of grid peak shaving and frequency regulation, gas turbine combined cycle units need to frequently adjust their output according to changes in grid load, resulting in annual utilization hours generally lower than design or rated values. In this situation, gas-fired power plants equipped with two units typically operate only one unit in rotation. This inevitably increases the number of cold starts, leading to adverse effects such as increased equipment wear, fatigue, higher operating costs, and increased safety risks. Due to limitations in the heating rate of the boiler and turbine in the steam-water system, the conventional cold start process of a combined cycle unit will involve prolonged operation under low-load conditions in a single gas turbine cycle. This not only results in low efficiency and high emissions but also causes a large portion of unused steam to be bypassed, leading to energy loss. The entire cold start process is complex and time-consuming, typically taking 5 to 7 hours from start-up to full load. This severely restricts the flexibility and response speed of peak shaving and frequency regulation of gas turbine combined cycle units, and also has a certain impact on the economic efficiency of unit start-up and operation.

[0003] Therefore, shortening the cold start-up time of combined cycle units has become an urgent problem for gas-fired power plants. Currently, combined cycle start-up is mostly optimized by conducting online monitoring and life assessment of the thermal stress during the boiler and turbine warm-up processes of the steam-water system; another approach is to use auxiliary steam from adjacent units within the same plant to preheat the steam-water system, thereby shortening the start-up time and saving boiler fuel and plant power. However, considering the safety of unit operation, the optimization effect of precise control methods is inevitably limited, and using auxiliary steam from adjacent units within the same plant for preheating is greatly limited by the overall operating status of the plant's units. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a cold start system and a combined cycle gas-steam system for renewable energy. This system utilizes solar energy to concentrate heat and deep geothermal energy to extract heat, heating molten salt for heat storage. Before the cold start of the combined cycle unit, the stored heat is released to flash the unit feedwater, generating warm-up steam. The steam temperature rise rate is controlled to preheat the steam-water system, realizing the transformation from cold start to warm start of the unit, greatly improving the optimization effect of cold start of the unit.

[0005] This invention is achieved through the following technical solution:

[0006] A cold start system for renewable energy includes a renewable energy thermal collection and extraction device and a molten salt thermal storage flash evaporation device;

[0007] The renewable energy heat collection and extraction device includes a molten salt heater and a renewable energy thermal energy device, wherein the working fluid circulation pipeline on the heat absorption side of the molten salt heater is connected to the renewable energy thermal energy device.

[0008] The molten salt thermal flash evaporation device includes a low-temperature molten salt tank, a high-temperature molten salt tank, and a flash evaporator installed on the working fluid circulation pipeline on the heat release side of the molten salt heater;

[0009] The steam-water side of the flash evaporator is connected to the waste heat boiler and steam turbine of the gas-fired steam combined cycle unit via the unit's preheating circulation pipeline.

[0010] Preferably, the renewable energy thermal energy device includes at least one heat source selected from solar energy devices, geothermal energy devices, boiler waste heat, high-temperature flue gas from a combined cycle unit, and auxiliary steam from an adjacent combined cycle unit.

[0011] Preferably, the working fluid pipelines of the solar energy device and the geothermal energy device are connected in parallel and connected in series with the working fluid circulation pipeline on the heat absorption side of the molten salt heater.

[0012] Preferably, a hot water storage tank is provided on the working fluid circulation pipeline on the heat absorption side of the molten salt heater. The hot water storage tank is connected to the heat absorption side hot port of the molten salt heater through a water pump, and the heat absorption side outlet of the molten salt heater is connected to the hot water storage tank through a renewable energy thermal energy device.

[0013] Preferably, a second heat extraction control valve group V4 is provided between the working fluid outlet of the renewable energy thermal energy device and the working fluid circulation pipeline on the heat absorption side, and a first heat extraction control valve group V3 is provided at the outlet of the working fluid circulation pipeline. The two heat extraction control valve groups are used to control the working status of the renewable energy heat collection and heat extraction device.

[0014] Preferably, the low-temperature molten salt tank is connected to the inlet of the molten salt heater on the heat release side, the outlet of the molten salt heater on the heat release side is connected to the molten salt pump through the high-temperature molten salt tank, the molten salt pump is connected to the working fluid inlet of the flash evaporator, and the working fluid outlet of the flash evaporator is connected to the low-temperature molten salt tank.

[0015] Preferably, a molten salt valve is provided on the heat release side circulation pipeline of the molten salt heater to control the working status of the molten salt heat storage flash evaporation device.

[0016] Preferably, the outlet on the steam-water side of the flash evaporator is connected to an electric auxiliary heater, which is connected in sequence to a waste heat boiler and a steam turbine via pipelines. The steam turbine is connected to the inlet on the steam-water side of the flash evaporator via a warm-up pump.

[0017] Preferably, it also includes a boiler start-up system;

[0018] The boiler start-up system is connected in parallel with the cold start-up system of renewable energy through the unit's preheating circulation pipeline.

[0019] A combined cycle gas-steam system, including a cold start system for the renewable energy source.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] This invention proposes a renewable energy cold start system for gas-steam combined cycle units. It utilizes solar thermal energy and deep geothermal energy to heat molten salt for heat storage. Before the cold start of the combined cycle unit, the stored heat is released to flash the unit feedwater, generate warm-up steam, control the steam temperature rise rate, and preheat the steam-water system. This saves boiler fuel and plant power during startup, promotes the decoupling of the gas turbine and steam-water system during unit startup, and greatly improves the optimization effect of cold start of the unit. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a cold start system for renewable energy according to the present invention.

[0023] In the diagram: 1 is a gas turbine; 2 is a waste heat boiler; 3 is a steam turbine; 4 is a generator; 5 is a condenser; 6 is a cooling tower; 7 is a feedwater pump; 8 is a chimney; 9 is a warm-up pump; 10 is a flash evaporator; 11 is an electric auxiliary heater; 12 is a warm-up valve; 13 is a low-temperature molten salt tank; 14 is a molten salt heater; 15 is a high-temperature molten salt tank; 16 is a molten salt pump; 17 is a molten salt valve; 18 is a hot water storage tank; 19 is a water pump; 20 is a geothermal injection well; 21 is a geothermal production well; 22 is a solar concentrator; V1 is the first heat release control valve group; V2 is the second heat release control valve group; V3 is the first heat extraction control valve group; V4 is the second heat extraction control valve group. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] See Figure 1 A cold start system for renewable energy includes a renewable energy thermal collection and extraction device and a molten salt thermal storage flash evaporation device;

[0031] The renewable energy heat collection and extraction device includes a molten salt heater 14, a solar energy device, and a geothermal energy device. The working fluid circulation pipeline on the heat absorption side of the molten salt heater 14 is connected to the solar energy device and the geothermal energy device.

[0032] The molten salt thermal flash evaporation device includes a low-temperature molten salt tank 13, a high-temperature molten salt tank 15, and a flash evaporator 10, which are installed on the working fluid circulation pipeline on the heat release side of the molten salt heater 14.

[0033] The steam-water side of the flash evaporator 10 is connected to the waste heat boiler and steam turbine of the gas-fired steam combined cycle unit through the unit preheating circulation pipeline.

[0034] This system utilizes molten salt, which has good heat transfer performance, a wide temperature range, low operating pressure, and low cost, as the heat transfer and storage medium. Combined with solar thermal energy and geothermal energy extraction technologies, it effectively converts renewable energy into high-temperature heat energy to heat the molten salt for timely heat storage. Before the cold start of the combined cycle unit, a portion of the condenser hot well feedwater can be released via flash evaporation to prepare start-up steam for the steam-water system to preheat the boiler and turbine. This decouples the gas turbine from the steam-water system, saving boiler fuel and plant power during startup, and significantly improving the optimization effect of cold start-up.

[0035] In some embodiments, the solar energy device is a solar collector 22, and the geothermal energy device includes a geothermal injection well 20 and a geothermal production well 21.

[0036] The working fluid outlets of the solar concentrator 22 and the geothermal production well 21 are connected to the hot water storage tank 18, the hot water storage tank 18 is connected to the water pump 19, the water pump 19 is connected to the heat absorption side inlet of the molten salt heater, and the heat absorption side outlet of the molten salt heater is connected to the geothermal injection well 20 and the working fluid inlet of the solar concentrator 22, respectively.

[0037] A second heat extraction control valve group V4 is installed between the working fluid outlet of the solar collector 22 and the geothermal production well 21 and the circulation pipeline. A first heat extraction control valve group V3 is installed at the heat absorption side outlet of the molten salt heater. The working status of the heat extraction device is controlled by the two heat extraction control valve groups.

[0038] The operating states of the heat extraction device include heat extraction using a solar thermal collector, heat extraction using a geothermal energy device, heat extraction using both a solar thermal collector and a geothermal energy device, and heat extraction being turned off.

[0039] The second heat extraction control valve group V4 includes three valves. Two valves are installed on the circulation pipeline and located on both sides of the outlet of the solar concentrator. The other valve is installed at the outlet of the solar concentrator.

[0040] The first heat extraction control valve group V3 includes three valves. Two valves are respectively located at the working fluid inlet of the solar collector and the inlet of the geothermal injection well 20, and the other valve is located at the heat absorption side outlet of the molten salt heater.

[0041] This renewable energy thermal energy collection and extraction device combines solar thermal energy collection technology and deep geothermal energy extraction technology. It aims to use renewable energy to heat the molten salt thermal storage medium. It uses two sets of heat extraction control valves, V3 and V4, to control the process. When the weather is sunny and there is sufficient sunlight, solar thermal energy is used to heat the molten salt thermal storage medium. When the weather is cloudy or rainy and the sunlight is weak, deep geothermal energy is used to heat the molten salt thermal storage medium.

[0042] In some embodiments, the solar thermal concentrating technology of the solar energy device is not limited to the reflector dish type concentrating technology, but can also be a parabolic trough type, a concentrating linear Fresnel reflector type, a heliostat tower type, or a combination of the above types.

[0043] In some embodiments, the deep geothermal energy extraction technology of the geothermal energy device is not limited to the form of well circulation heat extraction technology, but can also be single-well closed circulation heat extraction technology, gravity heat pipe circulation heat extraction technology, single-well open circulation heat extraction technology, U-shaped well closed circulation heat extraction technology and multi-branch radial well circulation heat extraction technology, or a combination of the above forms.

[0044] In some embodiments, the structure of the molten salt heat storage flash evaporation device is as follows: the outlet of the low-temperature molten salt tank 13 is connected to the working fluid inlet of the molten salt heater 14, the working fluid outlet of the molten salt heater 14 is connected to the high-temperature molten salt tank 15, the high-temperature molten salt tank 15 is connected to the molten salt pump 16, the molten salt pump 16 is connected to the working fluid inlet of the flash evaporator, and the working fluid outlet of the flash evaporator is connected to the low-temperature molten salt tank 13.

[0045] A molten salt valve 17 is provided on the heat release side circulation pipeline of the molten salt heater 14 to control the working status of the molten salt heat storage flash evaporation device. In this embodiment, the molten salt valve 17 is located at the working fluid inlet of the flash evaporator 10.

[0046] In some embodiments, the working medium of the molten salt heater 14 is not limited to a single form composed of alkali metals or alkaline earth metals and halides, silicates, carbonates, nitrates and phosphates, but can also be a coupled form composed of multiple of the above components.

[0047] In some embodiments, the heat source of the heating medium of the molten salt heater 14 is not limited to renewable energy sources. It can also be high-temperature flue gas from a combined cycle unit, auxiliary steam from a nearby unit, or other waste heat from an industrial park. All of these can be connected in parallel with the two renewable energy sources mentioned above.

[0048] In some embodiments, the preheating circulation pipeline of the unit is connected to the steam-water side of the flash evaporator 10, the outlet of the steam-water side of the flash evaporator 10 is connected to the electric auxiliary heater 11, the electric auxiliary heater 11 is connected to the waste heat boiler 2 and the steam turbine 3 in sequence through pipelines, and the steam turbine 3 is connected to the inlet of the steam-water side of the flash evaporator 10 through the warm-up pump 9.

[0049] This molten salt thermal flash evaporation device utilizes the timely storage and release of heat from molten salt to flash evaporate the feedwater in the preheating circulation pipeline of the unit, generating start-up steam. During operation, the low-temperature molten salt in the low-temperature molten salt tank 13 is heated by the molten salt heater 14 to form high-temperature molten salt, which enters the high-temperature molten salt tank 15 for heat storage. The high-temperature molten salt is then regulated by the molten salt pump 16 and the molten salt valve 17 to enter the flash evaporator 10, where it flashes part of the condenser hot well feedwater as a heat source to generate steam, before returning to the low-temperature molten salt tank 13 to form a cycle. The generated start-up steam is then supplemented by the electric auxiliary heater 11 and supplied to the steam-water system for preheating the boiler and preheating the generator.

[0050] Both the molten salt heater and the flash evaporator require detailed heat exchange calculations and design based on the flow characteristics of the molten salt side and the steam-water side, and should be placed in a suitable location near the unit.

[0051] In some embodiments, the gas-steam combined cycle unit includes a gas turbine 1, a waste heat boiler 2, a steam turbine 3, a generator 4, a condenser 5, a cooling tower 6, a feedwater pump 7, and a chimney 8.

[0052] The gas turbine, steam turbine, and generator are arranged coaxially. The waste heat boiler 2 is connected to one end of the gas turbine 1, the other end of the gas turbine 1 is connected to the steam turbine 3, the steam turbine 3 is connected to the generator, the exhaust of the steam turbine 3 is connected to the condenser 5, the condenser 5 is connected to the cooling tower 6, the condenser 5 is connected to the waste heat boiler 2 through the feed water pump 7, and the chimney 8 is connected to the waste heat boiler 2.

[0053] In some embodiments, the cold start system of the renewable energy source is connected in parallel with the boiler start system through the unit preheating circulation pipeline.

[0054] The boiler start-up system is a start-up system that comes with the gas-fired steam combined cycle system. It includes a first start-up boiler and a second start-up boiler. The first start-up boiler is connected to the steam turbine 3 through the unit preheating circulation pipeline, and the second start-up boiler is connected to the outlet of the condenser 5.

[0055] When the unit starts up, the gas turbine is ignited and a portion of the condenser feedwater is directed to the start-up boiler to generate start-up steam, which is used to preheat the waste heat boiler and steam turbine. Due to the thermal stress limitation of the steam-water system pipelines, the preheating rate of the waste heat boiler and steam turbine should not be too fast. After the unit is loaded, it operates at low load in a single cycle of gas turbine for a long time until the pressure and temperature of each level of the steam-water system pipelines reach the standard, and then the unit gradually increases the load to full load.

[0056] In some embodiments, a first heat release regulating valve group V1 and a second heat release regulating valve group V2 are provided on the preheating circulation pipeline of the unit.

[0057] The first heat release control valve group V1 includes three valves, two of which are respectively installed on the outlet of the first start-up boiler and the outlet pipeline of the waste heat boiler 2, and the other valve is installed at the inlet of the steam turbine.

[0058] The second heat release control valve group V2 includes three valves: one valve is located at the outlet of the condenser, one valve is located at the inlet of the warm-up pump 9, and the other valve is located at the inlet of the water pump 7.

[0059] The working principle of the above-mentioned cold start system for renewable energy will be explained in detail below.

[0060] The cold start system of renewable energy and the boiler start system of gas-steam combined cycle system provided by the present invention are connected in parallel through the preheating circulation pipeline of the unit, and two sets of heat release control valve groups V1 and V2 are set at the connection point to coordinate the control.

[0061] When the heat storage of the renewable energy cold start system cannot meet the start-up conditions of the gas-steam combined cycle system, the renewable energy cold start system stops working. By controlling the heat extraction control valve group and the heat release control valve group, the combined cycle unit is started up using the boiler start-up system in a cold state.

[0062] When the cold start system of renewable energy has sufficient heat storage and is suitable for operation, before the cold start of the combined cycle unit, the cold start system of renewable energy releases heat in a timely manner. The flash evaporator heats the feedwater in the preheating circulation pipeline of the unit to prepare start-up steam. The steam enters the waste heat boiler and steam turbine through the preheating circulation pipeline of the unit for preheating, realizing the transformation of the unit from cold start to warm start and shortening the cold start time of the combined cycle unit.

[0063] In another aspect, the present invention provides a gas-steam combined cycle system, including the aforementioned cold start system for renewable energy.

[0064] This invention provides a cold start system for renewable energy, comprising a renewable energy thermal energy collection and extraction device and a molten salt thermal energy flash evaporation device; the renewable energy thermal energy collection and extraction device includes a hot water storage tank, a water pump, a molten salt heater, a geothermal injection well, a geothermal production well, a solar thermal collector, and other equipment. This device combines solar thermal energy collection technology and deep geothermal energy extraction technology, aiming to utilize renewable energy to heat the molten salt thermal energy storage medium. The two heating methods are controlled by two sets of heat extraction control valves. In sunny weather with ample sunlight, solar thermal energy collection is used to heat the molten salt thermal energy storage medium; in cloudy or rainy weather with weak sunlight, deep geothermal energy is used to heat the molten salt thermal energy storage medium.

[0065] The molten salt thermal storage flash evaporation unit includes a warm-up pump, flash evaporator, electric auxiliary heater, warm-up valve, low-temperature molten salt tank, molten salt heater, high-temperature molten salt tank, molten salt pump, and molten salt valve. This unit utilizes the timely storage and release of heat from molten salt to flash evaporate a portion of the condenser hot well feedwater to generate start-up steam. During operation, the low-temperature molten salt in the low-temperature molten salt tank is heated by the molten salt heater to form high-temperature molten salt, which then enters the high-temperature molten salt tank for heat storage. The high-temperature molten salt is then regulated by the molten salt pump and molten salt valve to enter the flash evaporator, where it flashes a portion of the condenser hot well feedwater to generate steam. The steam then returns to the low-temperature molten salt tank, forming a cycle. The generated start-up steam is then reheated by the electric auxiliary heater and supplied to the steam-water system for preheating the boiler and steam turbine.

[0066] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A cold start system for a regenerative energy source, characterized by, The renewable energy heat collecting and taking device and the molten salt heat storage flash device are included. The renewable energy heat collecting and taking device includes a molten salt heater and a renewable energy heat device, and the heat absorption side working medium circulation pipeline of the molten salt heater is connected to the renewable energy heat device. The renewable energy heat device includes at least one heat source of a solar energy device, a geothermal energy device, boiler waste heat, high-temperature flue gas of a combined cycle unit and auxiliary steam adjacent to the combined cycle unit. The molten salt heat storage flash device includes a low-temperature molten salt tank, a high-temperature molten salt tank and a flash evaporator arranged on the heat release side working medium circulation pipeline of the molten salt heater. The low-temperature molten salt tank is connected to the inlet of the heat release side of the molten salt heater, the outlet of the heat release side of the molten salt heater is connected to the molten salt pump through the high-temperature molten salt tank, the molten salt pump is connected to the working medium inlet of the flash evaporator, and the working medium outlet of the flash evaporator is connected to the low-temperature molten salt tank. The steam-water side of the flash evaporator is connected to the waste heat boiler and the steam turbine of the combined cycle unit through the unit preheating circulation pipeline. The outlet of the steam-water side of the flash evaporator is connected to the electric auxiliary heater, the electric auxiliary heater is connected to the waste heat boiler and the steam turbine through the pipeline in sequence, and the steam turbine is connected to the inlet of the steam-water side of the flash evaporator through the warm-up pump.

2. A cold start system for a regenerative energy source as defined in claim 1, wherein The working medium pipelines of the solar energy device and the geothermal energy device are connected in parallel and connected in series with the heat absorption side working medium circulation pipeline of the molten salt heater.

3. A cold start system for a regenerative energy source as defined in claim 2, wherein A heat storage water tank is arranged on the heat absorption side working medium circulation pipeline of the molten salt heater, the heat storage water tank is connected to the heat absorption side hot port of the molten salt heater through a water pump, and the heat absorption side outlet of the molten salt heater is connected to the heat storage water tank through the renewable energy heat device.

4. A cold start system for a regenerative energy source as defined in claim 1, wherein A second heat taking control valve group V4 is arranged between the working medium outlet of the renewable energy heat device and the heat absorption side working medium circulation pipeline, a first heat taking control valve group V3 is arranged at the outlet of the working medium circulation pipeline, and the two heat taking control valve groups are used to control the working state of the renewable energy heat collecting and taking device.

5. A cold start system for a regenerative energy source as defined in claim 1, wherein A molten salt valve is arranged on the heat release side circulation pipeline of the molten salt heater and used to control the working state of the molten salt heat storage flash device.

6. A cold start system for a regenerative energy source as defined in claim 1, wherein, A boiler starting system is further included. The boiler starting system is connected in parallel with the renewable energy cold starting system through the unit preheating circulation pipeline.

7. A combined gas and steam cycle system, characterized by, The renewable energy cold starting system includes the renewable energy heat collecting and taking device according to any one of claims 1-6. The renewable energy cold starting system includes the renewable energy heat collecting and taking device according to any one of claims 1-6.

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