CN217215980U - Power Peak Shaving System Based on Gas Pipeline Network - Google Patents

Abstract

The utility model relates to an electric power peak shaving system based on fire pipe network, including firing the pipe network of joining in marriage, the power supply electric wire netting, and domestic gas main valve, domestic power supply bus, the output that fires the pipe network of joining in marriage is connected to domestic gas main valve, the power supply electric wire netting is connected to domestic power supply bus, electric power peak shaving system still includes electrolysis hydrogen plant, methanation device and gas power generation facility, fire the output that the pipe network connects the methanation device respectively and gas power generation facility's input, electrolysis hydrogen plant and gas power generation facility all are connected with the power supply electric wire netting, electrolysis hydrogen plant and methanation device are connected. Compared with the prior art, the utility model discloses based on fire the transport that pipe network realized the energy medium, with the help of gas power generation facility and electrolysis hydrogen plant, methanation device realization energy medium's conversion, always and can not need newly-built pipeline, also reduced the safety risk and the high cost of the direct transportation of hydrogen energy.

Description

Power Peak Shaving System Based on Gas Pipeline Network

technical field

The utility model relates to a power peak shaving system, in particular to an electric power peak shaving system based on a fuel piping network.

Background technique

In order to effectively cope with the increasing greenhouse gas emissions and global energy demand, new environmentally friendly power technologies are essential. Renewable sources such as solar energy and wind have great potential, but they are difficult to utilize due to their volatility and intermittent nature. Renewable energy has so far been difficult to utilize due to its volatility and intermittent nature. So far, the volatility and intermittent power problems caused by renewable energy have only occurred in local grids with a high proportion of renewable energy. Germany, for example, aims to generate 80% of its electricity from renewable sources by 2050, but this means that more technology is needed to keep the electricity stable, however, when the share of electricity generated from renewable sources is high, energy storage technology is needed , batteries, compressed air, flywheels, etc. are all suitable for short-term electrical energy storage, while hydrogen as an energy carrier can realize long-term storage of electrical energy, which leads to the concept of PTX.

PTX can be understood as an umbrella definition describing all technological trajectories from water electrolysis to hydrogen production to end use across the energy sector. The definition and scope of what PTX covers is constantly evolving, due to the relative novelty of its conceptualization and the variety of technological avenues it encompasses.

PTX mainly refers to power to gas (PTG), which is an energy conversion technology that originated in European countries at the beginning of this century. In a broad sense, the technology of electricity-to-gas conversion refers to electrolytic hydrogen production, which converts electricity into hydrogen through electrolysis of water, and stores the resulting product in a pressure tank. When needed, it can be converted into electricity by a fuel cell or an internal hydrogen engine. .

Then, due to the high cost of transportation and storage of hydrogen, the cost of directly using hydrogen as an energy source for the final user terminal is high.

Utility model content

The purpose of the utility model is to provide a power peak regulation system based on the fuel piping network, which realizes the transmission of the energy medium based on the fuel piping network, and realizes the conversion of the energy medium by means of a gas power generation device, an electrolysis hydrogen production device, and a methanation device. There is no need to build new pipelines, which also reduces the safety risks and high costs of direct hydrogen transportation.

The purpose of the present utility model can be achieved through the following technical solutions:

A power peak regulation system based on a gas pipeline network, comprising a gas pipeline network, a power supply grid, a household gas main valve, and a household power supply bus, the output end of the gas pipeline network is connected to the household gas main valve, and the power supply grid is connected to To the household power supply bus, the power peak regulation system further includes an electrolysis hydrogen production device, a methanation device and a gas power generation device,

The gas piping network is respectively connected to the output end of the methanation device and the input end of the gas-fired power generation device.

The power peak regulation system further includes a fuel cell power generation device, and the fuel cell power generation device is respectively connected with the electrolysis hydrogen production device and the power supply grid.

The gas-fired power generation device is a distributed gas-fired power generation unit.

The distributed gas generator sets are distributed in each community.

The cell is a power user cell.

The system also includes a central heat exchanger and a hot water tank, the heat release circuit of the central heat exchanger is connected to the circulating water pipeline of the distributed gas-fired generator set, and the heat absorption circuit is connected to the hot water tank.

The hot water tank is connected to the main domestic hot water valve.

The output end of the domestic hot water main valve is connected to the domestic water heater.

The central heat exchanger is a disc heat exchanger.

The power peak regulation system further includes a hydrogen storage device, and the hydrogen storage device is connected with the electrolysis hydrogen production device.

Compared with the prior art, the utility model has the following beneficial effects:

1. Realize the transmission of energy medium based on the gas pipeline network, and realize the conversion of energy medium with the help of gas power generation device, electrolysis hydrogen production device, and methanation device. In general, it is not necessary to build new pipelines, and it also reduces the safety risks and safety risks of direct hydrogen energy transportation. high cost.

2. The fuel cell power generation device can reduce the loss of energy conversion.

3. The gas power generation device is a distributed gas generator set, which can improve the response speed and compensate locally.

4. Through the centralized heat exchanger, the excess heat energy generated by the distributed gas generator set can be effectively utilized.

Description of drawings

Fig. 1 is the structural representation of the utility model;

FIG. 2 is a schematic diagram of the energy conversion structure on the user side;

Among them: 1. Power supply grid, 2. Gas pipeline network, 3. Electrolysis hydrogen production device, 4. Methanation device, 5. Gas power generation device, 6. Household gas main valve, 7. Power supply bus, 8. Central heat exchanger , 9, hot water tank.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

In the existing urban energy supply network, there already has a mature power supply grid 1 for electric power supply and a fuel piping network 2 for supplying gas. The purpose of this application is to utilize the mature fuel piping network 2 to realize PTX. Specifically, Provide a power peak shaving system based on a fuel piping network 2, as shown in Figures 1 and 2, including a fuel piping network 2, a power supply grid 1, a household gas main valve 6, a household power supply bus 7, and the fuel piping network 2. The output end is connected to the household gas main valve 6, the power supply grid 1 is connected to the household power supply bus 7, and the power peak regulation system also includes an electrolysis hydrogen production device 3, a methanation device 4 and a gas power generation device 5,

The gas piping network 2 is respectively connected to the output end of the methanation device and the input end of the gas-fired power generation device 5 .

The transmission of energy medium is realized based on the gas pipeline network 2, and the conversion of energy medium is realized by means of the gas-fired power generation device 5, the electrolytic hydrogen production device 3, and the methanation device 4. In general, no new pipelines are needed, and the safety of direct hydrogen energy transportation is also reduced. Risk and high cost.

In some embodiments, the power peak regulation system further includes a fuel cell power generation device, and the fuel cell power generation device is respectively connected to the electrolysis hydrogen production device 3 and the power supply grid 1 . Since one step of energy conversion is eliminated, because of the reduced energy loss, in this case a certain amount of hydrogen can be mixed into the natural gas for delivery, injecting hydrogen into the natural gas network, which produces an unreacted gas mixture. Without conversion, the resulting energy losses are low and only limited additional investment is required. The volume is still limited by regulatory barriers and hydrogen concentration, which can be mixed into the gas grid without adjustment. The latter depends on pipeline integrity and safety concerns, hydraulic constraints, and terminal equipment susceptibility to hydrogen/methane mixtures. In general, the entire natural gas network should be able to withstand 5% volume mixing and up to 20% volume mixing in gas distribution pipelines or regional transmissions with critical downstream equipment. As a result, hydrogen can be transported through the gas pipeline network, and the hydrogen can be extracted at the terminal hydrogen refueling station with some separation equipment.

In other embodiments, the gas-fired power generation device 5 is a distributed gas-fired power generation unit. Specifically, the distributed gas-fired power generation unit is distributed in each cell. Among them, the cell is a power user cell, which is not completely consistent with the real cell. It is obtained by the power supply unit by dividing each power user, which can improve the response speed and compensate locally.

In this part of the embodiment, the system also includes a central heat exchanger 8 and a hot water tank 9. The heat release circuit of the central heat exchanger 8 is connected to the circulating water pipeline of the distributed gas-fired generator set, and the heat absorption circuit is connected to the hot water tank. 9. The excess thermal energy generated by the distributed gas-fired generator set can be effectively utilized. Among them, the hot water tank 9 is connected to the main domestic hot water valve, and the output end of the main domestic hot water valve is connected to the domestic water heater, and then the existing hot water pipeline is used for transportation, and the pipeline cannot be modified. In one of the embodiments, the central heat exchanger is an 8-position disc heat exchanger, which can improve the heat exchange efficiency.

In some embodiments, the power peak regulation system further includes a hydrogen storage device, and the hydrogen storage device is connected to the electrolysis hydrogen production device 3, and further hydrogen storage can also be carried out.

Claims (10)

1. A power peak regulation system based on a gas pipeline network, comprising a gas pipeline network, a power supply grid, a household gas main valve, and a household power supply bus, the output end of the gas pipeline network is connected to the household gas main valve, and the power supply The power grid is connected to the household power supply bus, and it is characterized in that the power peak regulation system further includes an electrolysis hydrogen production device, a methanation device and a gas power generation device, The gas piping network is respectively connected to the output end of the methanation device and the input end of the gas-fired power generation device. 2 . A power peak regulation system based on a fuel piping network according to claim 1 , wherein the power peak regulation system further comprises a fuel cell power generation device, the fuel cell power generation device and the electrolysis hydrogen production device respectively. 3 . connected to the power grid. 3 . The power peak regulation system based on a gas piping network according to claim 1 , wherein the gas power generation device is a distributed gas power generator set. 4 . 4 . The power peak regulation system based on a gas piping network according to claim 3 , wherein the distributed gas generator sets are distributed in each cell. 5 . 5 . The power peak shaving system based on a fuel piping network according to claim 4 , wherein the cells are power user cells. 6 . 6. A power peak regulation system based on a fuel piping network according to claim 3, wherein the system further comprises a central heat exchanger and a hot water tank, and the heat release circuit of the central heat exchanger is connected to The circulating water pipeline to the distributed gas generator set, and the heat absorption circuit is connected to the hot water tank. 7 . The power peak shaving system based on the fuel piping network according to claim 6 , wherein the hot water tank is connected to a domestic hot water main valve. 8 . 8 . The power peak shaving system based on a fuel piping network according to claim 7 , wherein the output end of the main domestic hot water valve is connected to a domestic water heater. 9 . 9 . The power peak shaving system based on a fuel piping network according to claim 6 , wherein the central heat exchanger is positioned as a disk heat exchanger. 10 . 10 . The power peak regulation system based on a fuel piping network according to claim 1 , wherein the power peak regulation system further comprises a hydrogen storage device, and the hydrogen storage device is connected to the electrolysis hydrogen production device. 11 .

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