CN211125845U - Low-temperature cold start system - Google Patents
Low-temperature cold start system Download PDFInfo
- Publication number
- CN211125845U CN211125845U CN201921676261.XU CN201921676261U CN211125845U CN 211125845 U CN211125845 U CN 211125845U CN 201921676261 U CN201921676261 U CN 201921676261U CN 211125845 U CN211125845 U CN 211125845U
- Authority
- CN
- China
- Prior art keywords
- fuel cell
- electric
- way valve
- valve
- cold start
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
Abstract
The embodiment of the utility model provides a low temperature cold start system, include: the fuel cell system comprises a fuel cell stack, a first temperature sensor, a water tank, a first electric three-way valve, an evaporator, a working medium pump, a liquid storage tank, a condenser, an expander, a generator, a DCDC module, an energy storage device, a heater and a water pump. The waterway outlet of the fuel cell stack is connected with the waterway inlet of the fuel cell stack through the first valve of the first electric three-way valve and the water pump. The first temperature sensor is arranged at the water circuit outlet of the fuel cell stack. And the second valve of the first electric three-way valve is connected with the evaporator. The evaporator, the working medium pump, the liquid storage tank, the condenser and the expander form a loop. The generator is connected in series between the expansion machine and the DCDC module, and the DCDC module is connected with the energy storage device and the heater. According to the scheme, waste heat generated by the fuel cell can generate electricity through the organic Rankine cycle, and when the fuel cell engine has a cold start requirement, the energy storage device supplies power to the heater to realize cold start.
Description
Technical Field
The utility model relates to an energy utilization technical field, concretely relates to low temperature cold start system.
Background
At present, a fuel cell can be normally started at a temperature of more than 0 ℃, and in order to prevent the inside of a stack from being frozen, when the ambient temperature is low, an internal or external heat source is required to heat the stack. The energy utilization rate is low, and therefore, how to provide a low-temperature cold start system can improve the energy utilization rate is a great technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a low temperature cold start system can improve energy utilization.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a low temperature cold start system comprising: the system comprises a fuel cell stack, a first temperature sensor, a water tank, a first electric three-way valve, an evaporator, a working medium pump, a liquid storage tank, a condenser, an expander, a generator, a DCDC module, an energy storage device, a heater and a water pump;
a waterway outlet of the fuel cell stack is connected with a waterway inlet of the fuel cell stack through a first valve of the first electric three-way valve and a water pump;
the first temperature sensor is arranged at a water circuit outlet of the fuel cell stack;
a second valve of the first electric three-way valve is connected with the evaporator;
the evaporator, the working medium pump, the liquid storage tank, the condenser and the expander form a loop;
the generator is connected in series between the expander and the DCDC module, and the DCDC module is connected with the energy storage device and the heater.
Optionally, the method further includes: a second temperature sensor, a second electric three-way valve and a radiator;
the second temperature sensor is arranged at a first valve of the first electric three-way valve;
the second electric three-way valve is connected in series between the first electric three-way valve and the water pump through the radiator.
Optionally, when the fuel cell is in operation, when the outlet temperature of the cooling water path is higher than the first limit value, the second valve of the first electric three-way valve is in an open state, and the cooling water flows through the evaporator and joins the branch where the second valve of the first electric three-way valve is located.
Optionally, after the evaporator absorbs heat, the expander does work, so that the generator outputs electric energy.
Optionally, the radiator is in an active mode when the cooling water temperature is above a second limit.
Optionally, when the temperature of the cooling water is lower than a third limit value, the energy storage device supplies power to the heater.
Based on the technical scheme, the embodiment of the utility model provides a low temperature cold start system is provided, include: the fuel cell system comprises a fuel cell stack, a first temperature sensor, a water tank, a first electric three-way valve, an evaporator, a working medium pump, a liquid storage tank, a condenser, an expander, a generator, a DCDC module, an energy storage device, a heater and a water pump. And the waterway outlet of the fuel cell stack is connected with the waterway inlet of the fuel cell stack through the first valve of the first electric three-way valve and the water pump. The first temperature sensor is arranged at a water path outlet of the fuel cell stack. And the second valve of the first electric three-way valve is connected with the evaporator. The evaporator, the working medium pump, the liquid storage tank, the condenser and the expander form a loop. The generator is connected in series between the expander and the DCDC module, and the DCDC module is connected with the energy storage device and the heater. According to the scheme, waste heat generated by the fuel cell can generate electricity through the organic Rankine cycle, and when the fuel cell engine has a cold start requirement, the energy storage device supplies power to the heater to realize cold start.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a low-temperature cold start system according to this embodiment;
fig. 2 is a schematic diagram of the operation of a low-temperature cold start system according to this embodiment.
Detailed Description
In combination with the background technology, the inventor considers that the heat generated by the proton exchange membrane fuel cell accounts for more than 40% of the total heat, and in order to improve the efficiency of a fuel cell engine and realize the low-temperature cold start function of the fuel cell, the scheme converts the waste heat generated by the electric pile into electric energy and stores the electric energy, and when the fuel cell needs to be cold started, the energy storage device supplies power to a heating part of the fuel cell, so that the temperature of the fuel cell is rapidly improved, and the normal-temperature start requirement is met.
Specifically, as shown in fig. 1, the utility model provides a low temperature cold start system, include: the fuel cell system comprises a fuel cell stack, a first temperature sensor, a water tank, a first electric three-way valve, an evaporator, a working medium pump, a liquid storage tank, a condenser, an expander, a generator, a DCDC module, an energy storage device, a heater and a water pump.
Wherein, the connection relation of each part is as follows:
a waterway outlet of the fuel cell stack is connected with a waterway inlet of the fuel cell stack through a first valve of the first electric three-way valve and a water pump;
the first temperature sensor is arranged at a water circuit outlet of the fuel cell stack;
a second valve of the first electric three-way valve is connected with the evaporator;
the evaporator, the working medium pump, the liquid storage tank, the condenser and the expander form a loop;
the generator is connected in series between the expander and the DCDC module, and the DCDC module is connected with the energy storage device and the heater.
Besides, the low-temperature cold start system provided by this embodiment may further include: a second temperature sensor, a second electric three-way valve, and a radiator.
Wherein the second temperature sensor is provided at a first valve of the first electric three-way valve. The second electric three-way valve is connected in series between the first electric three-way valve and the water pump through the radiator.
In combination with the connection relation, the principle of the scheme is as follows:
① when the outlet temperature of the cooling water circuit is higher than the first limit value, the second valve of the first electric three-way valve is in open state, and the cooling water flows through the evaporator and joins with the branch of the second valve of the first electric three-way valve.
② after the evaporator absorbs heat, the expander does work, so that the generator outputs electric energy.
③ the radiator is in an active mode when the cooling water temperature is above a second limit.
④ when the cooling water temperature is below a third limit, the energy storage device powers the heater.
Schematically, in combination with fig. 1, the present embodiment provides a system for implementing low-temperature cold start by using waste heat, including a fuel cell stack 1, a temperature sensor 2, a water tank 3, an electric three-way valve 4, an evaporator 5, a working medium pump 6, a liquid storage tank 7, a condenser 8, an expander 9, a generator 10, a DCDC11, an energy storage device 12, a heater 13, a temperature sensor 14, an electric three-way valve 15, a radiator 16, a water pump 17, and a temperature sensor 18.
Specifically, the fuel cell stack waterway outlet is connected with a temperature sensor 2 and a water tank 3, an electric three-way valve 4 is divided into a valve 1 and a valve 2, the valve 1 is communicated with an evaporator 5, the valve 2 is connected with an electric three-way valve 15 through a temperature sensor 14, and cooling water flows through the evaporator 5 and then is connected with the electric three-way valve 15. Since the capability of the organic rankine cycle to utilize waste heat is limited, when the power of the fuel cell is increased, the heat dissipation requirement cannot be met, and therefore, the electric three-way valve 15 is added to continuously cool or heat the cooling water. The evaporator 5, the expander 9, the condenser 8, the liquid storage tank 7 and the working medium pump 6 are sequentially connected, the expander 9 applies work to drive the generator 10 to rotate, and the generator stores the generated electric energy into the energy storage device 12 through the DCDC.
The working principle of the method is shown in fig. 2, which is as follows:
when the fuel cell is operating, if the outlet temperature of the cooling water path (temperature t1 measured by temperature sensor 2) is higher than the first limit value, valve 1 of electric three-way valve 4 is opened, and the cooling water flows through evaporator 5 and joins the branch of electric three-way valve 4 where valve 2 is located.
The organic working medium absorbs heat in the evaporator 5 and then becomes saturated steam or superheated steam with a high enthalpy value, then enters the expansion machine 9, the energy generated by the work of the expansion machine 9 drives the generator 10 to rotate to output current, the organic working medium becomes low-pressure steam after passing through the expansion machine 9, the low-pressure steam is cooled to saturated liquid through the condenser 8, the saturated liquid flows into the liquid storage tank 7 to be stored, and finally the low-pressure steam is compressed to the inlet of the evaporator 5 through the working medium pump 6. Because the temperature of the waste heat of the proton exchange membrane is not high, the organic working medium can be selected from working media with lower boiling points, such as R245 fa.
The ac power generated by the generator 10 is converted to dc power by the device 19 and the dc power is stored in the energy storage device by the DCDC 11.
Because the capability of the organic Rankine cycle for cooling the electric pile is limited, when the power of the electric pile is larger, the cooling requirement of the electric pile cannot be met only by the cycle. The system performs secondary cooling after the cooling water flows through the evaporator 5, namely, a radiator 16 is connected in series behind the evaporator 5.
When the cooling water temperature (temperature t2 measured by the temperature sensor 14) is higher than the second limit value, heat dissipation by the radiator 5 is continued. If the temperature meets the temperature required by the galvanic pile under the working condition, the rotating speed of the radiator 5 is 0, and the electric pile does not work.
When the temperature of the cooling water (the temperature t3 measured by the temperature sensor 18) is lower than the third limit value, namely the electric pile needs to be started in a cold mode, the energy storage device 12 supplies power to the heater 13 at the moment, the cooling water is heated, and the temperature of the electric pile is rapidly increased.
Therefore, the scheme utilizes the organic Rankine cycle to partially recover the heat of the cooling water channel of the fuel cell. The generated electricity is stored, and when the external environment temperature is low, the stored electric energy is utilized to heat cooling water, so that the temperature of the galvanic pile is rapidly raised. When the power of the fuel cell is high, the heat dissipation is insufficient only by means of the organic Rankine cycle, so that the fan is connected in series after cooling water flows through the evaporator, and when the water temperature is high, the fan is continuously used for dissipating heat, so that the requirement of the electric pile on the temperature is met.
To sum up, the embodiment of the utility model provides a low temperature cold start system, include: the fuel cell system comprises a fuel cell stack, a first temperature sensor, a water tank, a first electric three-way valve, an evaporator, a working medium pump, a liquid storage tank, a condenser, an expander, a generator, a DCDC module, an energy storage device, a heater and a water pump. The waterway outlet of the fuel cell stack is connected with the waterway inlet of the fuel cell stack through the first valve of the first electric three-way valve and the water pump. The first temperature sensor is arranged at the water circuit outlet of the fuel cell stack. And the second valve of the first electric three-way valve is connected with the evaporator. The evaporator, the working medium pump, the liquid storage tank, the condenser and the expander form a loop. The generator is connected in series between the expansion machine and the DCDC module, and the DCDC module is connected with the energy storage device and the heater. According to the scheme, waste heat generated by the fuel cell can generate electricity through the organic Rankine cycle, and when the fuel cell engine has a cold start requirement, the energy storage device supplies power to the heater to realize cold start.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A cold start system at low temperature, comprising: the system comprises a fuel cell stack, a first temperature sensor, a water tank, a first electric three-way valve, an evaporator, a working medium pump, a liquid storage tank, a condenser, an expander, a generator, a DCDC module, an energy storage device, a heater and a water pump;
a waterway outlet of the fuel cell stack is connected with a waterway inlet of the fuel cell stack through a first valve of the first electric three-way valve and a water pump;
the first temperature sensor is arranged at a water circuit outlet of the fuel cell stack;
a second valve of the first electric three-way valve is connected with the evaporator;
the evaporator, the working medium pump, the liquid storage tank, the condenser and the expander form a loop;
the generator is connected in series between the expander and the DCDC module, and the DCDC module is connected with the energy storage device and the heater.
2. The cold start system of claim 1, further comprising: a second temperature sensor, a second electric three-way valve and a radiator;
the second temperature sensor is arranged at a first valve of the first electric three-way valve;
the second electric three-way valve is connected in series between the first electric three-way valve and the water pump through the radiator.
3. The cold start-up system of claim 2, wherein when the outlet temperature of the cooling water circuit is higher than the first limit value during the operation of the fuel cell, the second valve of the first electric three-way valve is in an open state, and the cooling water flows through the evaporator and joins the branch where the second valve of the first electric three-way valve is located.
4. A cold start system according to claim 2 wherein the expander, after absorbing heat, works such that the generator outputs electrical energy.
5. A cold start system according to claim 2, wherein the radiator is in an active mode when the cooling water temperature is above a second limit.
6. A cold start system according to claim 2, wherein the energy storage device powers the heater when the cooling water temperature is below a third limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921676261.XU CN211125845U (en) | 2019-09-30 | 2019-09-30 | Low-temperature cold start system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921676261.XU CN211125845U (en) | 2019-09-30 | 2019-09-30 | Low-temperature cold start system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211125845U true CN211125845U (en) | 2020-07-28 |
Family
ID=71690474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921676261.XU Active CN211125845U (en) | 2019-09-30 | 2019-09-30 | Low-temperature cold start system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211125845U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715686A (en) * | 2021-08-26 | 2021-11-30 | 南昌智能新能源汽车研究院 | Comprehensive heat management method for fuel cell vehicle |
| CN113809356A (en) * | 2021-09-17 | 2021-12-17 | 烟台东德实业有限公司 | Energy-saving fuel cell thermal management system |
-
2019
- 2019-09-30 CN CN201921676261.XU patent/CN211125845U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715686A (en) * | 2021-08-26 | 2021-11-30 | 南昌智能新能源汽车研究院 | Comprehensive heat management method for fuel cell vehicle |
| CN113809356A (en) * | 2021-09-17 | 2021-12-17 | 烟台东德实业有限公司 | Energy-saving fuel cell thermal management system |
| CN113809356B (en) * | 2021-09-17 | 2022-04-12 | 烟台东德实业有限公司 | Fuel cell thermal management system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108365235B (en) | Fuel cell waste heat utilization system based on organic Rankine cycle | |
| CN102094772B (en) | Solar energy-driven cogeneration device | |
| CN211125845U (en) | Low-temperature cold start system | |
| EP2578951A2 (en) | Small-scale combined heat and power system and method for controlling same | |
| CN105089849A (en) | Exhaust afterheat temperature difference thermoelectric system | |
| CN109140797B (en) | Solar energy and air energy combined power generation system and refrigerating, power generation and heating method thereof | |
| CN114413503B (en) | Renewable energy driven zero-carbon efficient distributed energy supply system and operation method | |
| CN109915219B (en) | Energy supply system and method integrating fuel cell and supercritical carbon dioxide solar thermal power generation | |
| CN110552750B (en) | Non-azeotropic organic Rankine-dual-injection combined cooling, heating and power system | |
| CN103321861A (en) | Dish solar power-heat cogeneration system based on singe-screw expander and molten salt | |
| CN110285571B (en) | Water heater based on thermoelectric refrigerator | |
| CN210035683U (en) | Combined cooling, heating and power device using solar energy | |
| JP3230562U (en) | Solar thermal power generation system based on liquid metal battery energy storage | |
| CN213273243U (en) | Solar photo-thermal combined cooling and power supply device | |
| CN211405756U (en) | Power generation system and automobile | |
| GB2613283A (en) | Multi-source regenerative compressed air energy storage comprehensive utilization system and method | |
| CN115930475A (en) | Heat pump energy storage system of combined heat and power supply | |
| CN210290021U (en) | Organic Rankine cycle system for utilizing waste heat of smoke of internal combustion engine and cylinder sleeve water | |
| CN201916138U (en) | Cogeneration device driven by solar energy | |
| CN113803156A (en) | Combined cooling heating and power system of ORC-jet type refrigerating device | |
| CN112161319A (en) | Portable aluminum-air fuel battery and heat pump coupling circulation heating system and use method | |
| CN220857640U (en) | Photovoltaic thermal energy storage power generation system | |
| CN115143506B (en) | Heat storage heating type solar photovoltaic photo-thermal system | |
| CN217589008U (en) | Novel thermal management system of fuel cell fixed power supply | |
| CN215523797U (en) | Waste heat solar complementary power generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |