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Cogeneration set for combining steam-driven heat pump with heat storage device and peak regulation method for cogeneration set

A heat storage device, steam-driven technology, applied in heating methods, engine components, machines/engines, etc.

Active Publication Date: 2016-12-07
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a thermoelectric unit combined with a steam-driven heat pump and a heat storage device and its peak regulation method to solve the need for a thermoelectric unit capable of recovering the heat of exhaust steam and having a heat storage function mentioned in the background art. The problem of unit participating in power grid peak regulation

Method used

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  • Cogeneration set for combining steam-driven heat pump with heat storage device and peak regulation method for cogeneration set
  • Cogeneration set for combining steam-driven heat pump with heat storage device and peak regulation method for cogeneration set
  • Cogeneration set for combining steam-driven heat pump with heat storage device and peak regulation method for cogeneration set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1, such as figure 1 The heat storage device shown is connected in the first way to a steam-driven heat pump in the hot water pipeline of the primary heating network and a thermoelectric unit combined with the heat storage device.

[0062] A thermoelectric unit combined with a steam-driven heat pump and a heat storage device includes a steam turbine low-pressure cylinder 1, a peak heater 2, a generator 3, an air-cooled island 13, a steam-water heat exchanger 21, a steam-driven heat pump 27, and a heat storage device 28, wherein the steam The driving heat pump 27 is composed of the heat pump driving steam turbine 4, compressor 5, evaporator 6, condenser 7 and throttle valve 8, and the heat storage device 28 is composed of heat storage tank 10, heat storage circulation pump 11, valve I17 and valve III19. The shaft of the steam turbine low-pressure cylinder 1 is connected to the shaft of the generator 3 .

[0063] The steam pipeline on the side of the power generat...

Embodiment 2

[0079] Example 2, such as figure 2 The heat storage device shown is connected in the second way to the steam-driven heat pump in the hot water pipeline of the primary heating network and the thermoelectric unit combined with the heat storage device.

[0080] In this embodiment, the heat storage device 28 is connected to the hot water pipeline of the primary heating network. The water side outlet of device 9 is connected; the remaining devices of the unit are the same as in Embodiment 1.

[0081] In the power grid, the peak-shaving method of the thermoelectric unit combined with the steam-driven heat pump and heat storage device:

[0082] A. Heat storage mode operation:

[0083] 1) The steam inlet valve 14 of the low pressure cylinder of the steam turbine, the steam inlet valve 23 of the peak heater, and the steam inlet valve 22 of the heat pump driven steam turbine are opened, the throttle valve 8 is opened, the low pressure cylinder 1 of the steam turbine, the peak heater ...

Embodiment 3

[0090] Example 3, such as image 3 The heat storage device shown is connected in the third way to a steam-driven heat pump in the hot water pipeline of the primary heating network and a thermoelectric unit combined with the heat storage device.

[0091] In this embodiment, the heat storage device 28 is connected to the hot water pipeline of the primary heating network. The water side inlet of device 9 is connected; the remaining devices of the unit are the same as in Embodiment 1.

[0092] In the power grid, the peak-shaving method of the thermoelectric unit combined with the steam-driven heat pump and heat storage device:

[0093] A. Heat storage mode operation:

[0094] 1) The steam inlet valve 14 of the low pressure cylinder of the steam turbine, the steam inlet valve 23 of the peak heater, and the steam inlet valve 22 of the heat pump driven steam turbine are opened, the throttle valve 8 is opened, the low pressure cylinder 1 of the steam turbine, the peak heater 2 and t...

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Abstract

The invention belongs to the technical field of thermoelectricity, and relates to a cogeneration set for combining a steam-driven heat pump with a heat storage device and a peak regulation method for the cogeneration set. The cogeneration set comprises a steam turbine, the steam-driven heat pump and the heat storage device basically, and is used for peak load regulation. By combining the steam-driven heat pump with the heat storage device, switching between a heat storage mode and a heat release mode is conducted according to the requirement on power generation dispatching of a thermal power plant, and the purpose that the grid power generation of the thermal power plant is changed when heat supply is ensured is achieved; and the steam exhaust heat is recovered through a condenser and an evaporator of the steam-driven heat pump, so that the heat supply cost of the thermal power plant is reduced. According to the cogeneration set, the peak load regulation range of the thermal power plant is expanded, the power regulation range of the power grid is further expanded, more grid power generation time is provided for renewable energy sources, such as wind power, and the problems such as wind curtailment are finally solved; and the external heating capacity of the thermal power plant of which the heating capacity is limited can be improved with the recovered steam exhaust heat. The cogeneration set is suitable for participating in peak load regulation.

Description

technical field [0001] The invention belongs to the technical field of thermoelectricity, and in particular relates to a thermoelectric unit combined with a steam-driven heat pump and a heat storage device and a peak regulation method thereof. Background technique [0002] The proportion of renewable energy such as wind power in my country's energy structure is gradually increasing and it is mainly distributed in the northern region. In the northern region of my country, the generator sets are mainly cogeneration and adopt "heat-based power" operation. The two types of power generation loads in the time scale The overlap with the spatial scale has led to increasingly serious problems such as "abandoned wind". How to increase the power generation adjustment range of cogeneration units to achieve "thermoelectric decoupling" so that the grid can absorb more renewable energy such as wind power, and at the same time improve the energy utilization efficiency of cogeneration systems...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B27/00F24D3/18F01D15/10F01D17/10
CPCF01D15/10F01D17/105F24D3/18F25B13/00F25B27/00Y02P80/15
Inventor 戈志华孙健杨勇平杨志平席新铭
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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