Combined heat and power unit combined with electric heat pump and heat storage device and its peak regulation method

A technology of cogeneration unit and heat storage device, which is applied in the direction of heating method, steam engine device, machine/engine, etc., to achieve the effect of reducing on-grid power generation, reducing heating energy consumption, and reducing on-grid power generation.

Inactive Publication Date: 2019-08-30
北京华电东晟科技有限公司
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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 combined heat and power unit combined with an electric heat pump and a heat storage device and its peak regulation method to solve the need for a heat storage device capable of recovering the heat of exhaust steam and having a heat storage function mentioned in the background art. Problems of Thermal Power Units Participating in Power Grid Peak Regulation

Method used

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  • Combined heat and power unit combined with electric heat pump and heat storage device and its peak regulation method
  • Combined heat and power unit combined with electric heat pump and heat storage device and its peak regulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1, such as figure 1 The shown heat storage device is connected in the first way to the combined heat and power unit used by the electric heat pump and the heat storage device in the hot water pipeline of the primary heating network.

[0040] The combined heat and power unit combined with electric heat pump and heat storage device includes steam turbine low pressure cylinder 1, peak heater 2, generator 3, air cooling island 13, electric heat pump 25 and heat storage device 26, wherein electric heat pump 25 is driven by a heat pump motor 4. Compressor 5, evaporator 6, condenser 7 and throttle valve 8, heat storage device 26 is composed of heat storage tank 10, heat storage circulation pump 11, valve I17 and valve III19, the shaft of steam turbine low-pressure cylinder 1 and Shaft connection of generator 3.

[0041] The steam pipeline on the side of the power generation system is: the inlet of the steam inlet valve 14 of the low-pressure cylinder of the steam turb...

Embodiment 2

[0057] Example 2, such as figure 2 The shown heat storage device is connected in the second way to the combined heat and power unit used by the electric heat pump and the heat storage device in the hot water pipeline of the primary heating network.

[0058] In this embodiment, the heat storage device 26 is connected to the hot water pipeline of the primary heating network in such a way that the hot water port 2601 of the heat storage device is connected to the water side outlet of the condenser 7, and the cold water port 2602 of the heat storage device is connected to the condenser 9 The water side inlet is connected; the remaining devices of the unit are the same as in Embodiment 1.

[0059] In the power grid, the peak-shaving method of the thermoelectric unit combined with the electric heat pump and the heat storage device:

[0060] A. Heat storage mode operation:

[0061] 1) The steam inlet valve 14 of the low-pressure cylinder of the steam turbine and the steam inlet va...

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Abstract

The invention belongs to the technical field of thermoelectricity, and relates to a heat-and-power cogeneration unit combining an electric heat pump and a heat storage device and a peak regulation method thereof. The heat-and-power cogeneration unit basically comprises a turbine, the electric heat pump and the heat storage device and can be used for peak regulation in a power grid. Through combination of the electric heat pump and the heat storage device, a heat storage mode and a heat release mode can be switched according to power generation dispatching requirements of a thermal power plant, and the purposes that heating is guaranteed while the grid power generation quantity of the thermal power plant is changed are achieved; and steam exhaust heat is recovered through a condenser and an evaporator of the electric heat pump, and the heating cost of the thermal power plant is lowered. According to the heat-and-power cogeneration unit combining the electric heat pump and the heat storage device and the peak regulation method thereof, the power generation peak regulation range of the thermal power plant is expanded, the electric power regulating range of the power grid is expanded accordingly, more grid power generation time is provided for wind electricity and other renewable energy sources, and the problem of wind abandoning is finally solved; and for a thermal power plant with the limited heating capacity, steam exhaust heat can be recovered by means of the heat-and-power cogeneration unit combining the electric heat pump and the heat storage device and the peak regulation method thereof, and the external heating capacity can be promoted. The heat-and-power cogeneration unit combining the electric heat pump and the heat storage device and the peak regulation method thereof are suitable for participating in power grid peak regulation.

Description

technical field [0001] The invention belongs to the technical field of thermoelectricity, and in particular relates to a heat and power cogeneration unit combined with an electric 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 cogenerati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24D3/18F01K17/02
CPCF01K17/005F01K17/025F24D3/18F24D2200/123Y02E20/14Y02E50/10Y02P80/15
Inventor 孙健戈志华杨勇平陈浩谈政
Owner 北京华电东晟科技有限公司
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