Multi-device combined high-low-temperature independent heat storage and supply system based on wind curtailment electric energy

A heat supply system and multi-equipment technology, applied in the energy field, can solve the problems of poor reliability and low efficiency of heat supply, achieve stable heat supply, reduce losses, and improve overall efficiency

Active Publication Date: 2017-07-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a multi-equipment combined high and low temperature independent heat storage heating system based o

Method used

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  • Multi-device combined high-low-temperature independent heat storage and supply system based on wind curtailment electric energy
  • Multi-device combined high-low-temperature independent heat storage and supply system based on wind curtailment electric energy
  • Multi-device combined high-low-temperature independent heat storage and supply system based on wind curtailment electric energy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Example: Assume that the abandoned wind volume of a certain wind farm has a daily cycle change rule, and the specific data of the abandoned wind volume is as follows:

[0023]

[0024] Assume that the design supply and return water temperature of the primary network of the heating system is as follows:

[0025] Primary network design water supply temperature Primary network design return water temperature t g ＝80℃

t h ＝10℃

[0026] It is assumed that the main design parameters of the electric boiler and the air source heat pump are as follows;

[0027] Design water supply temperature Coefficient of performance electric boiler t 1 ＝120℃

COP b = 1

air source heat pump t 2 ＝60℃

COP HP =4

[0028] In order to ensure that the water supply temperature of the primary network is 80°C, the flow ratio of the electric boiler and the air source heat pump can be calculated from the energy balance equation as ...

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Abstract

The invention discloses a multi-device combined high-low-temperature independent heat storage and supply system based on wind curtailment electric energy, and relates to a heat supply system. The problems that an existing electric heat supply system is low in exergy efficiency and poor in heat supply reliability can be solved. The multi-device combined high-low-temperature independent heat storage and supply system comprises a primary network water supply pipe, a primary network water return pipe, a primary network circulating pump and secondary network circulating pumps and further comprises a regional energy station and a distributed heat pump station. The regional energy station comprises an electric boiler, an air source heat pump, a high-temperature heat storage tank, a low-temperature heat storage tank, a heat release pump and a heat storage pump. The distributed heat pump station comprises a heat exchanger and an electric heating pump. The electric boiler and the air source heat pump which are connected in parallel are arranged between the primary network water supply pipe and the primary network water return pipe. The heat exchanger and the electric heating pump which are connected in series are further arranged between the primary network water supply pipe and the primary network water return pipe. Secondary pipe networks are arranged between the heat exchanger and an existing user radiating device and between the electric heating pump and the existing user radiating device. The secondary pipe networks are provided with the corresponding secondary network circulating pumps. The multi-device combined high-low-temperature independent heat storage and supply system is used for supplying heat.

Description

technical field [0001] The invention relates to a heating system and belongs to the field of energy. Background technique [0002] Energy and environmental issues are severe challenges faced by the whole world in the new century, and the development of clean and renewable energy is an effective way to solve this problem. my country's wind power industry has maintained a strong growth momentum in the past ten years, and has now become the country with the largest installed wind power capacity in the world. [0003] However, many wind farms in the Three-North region face severe wind curtailment problems in winter due to the lag in supporting construction of the power grid, the small installed capacity of flexible peak-shaving power sources, and the high proportion of thermal power without power peak-shaving capacity in winter. To put it simply, "abandoned wind" refers to the amount of electricity that can be generated by wind farms but cannot be generated due to factors such ...

Claims

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Application Information

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IPC IPC(8): F24D11/00F24D11/02F24D19/10
CPCF24D11/002F24D11/0228F24D19/1012F24D19/1015F24D19/1039F24D2200/08F24D2200/12F24D2220/0207F24D2220/08
Inventor 王晋达周志刚赵加宁郑进福
Owner HARBIN INST OF TECH
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