Distributed heat supply system based on comprehensive utilization of various clean energy sources

Abstract

The invention provides a distributed heat supply system based on comprehensive utilization of various clean energy sources. The system comprises a wind-solar complementary power generation unit, an electric heat pump unit and an electric boiler heat supply unit, and the wind-solar complementary power generation unit is electrically connected with the electric heat pump unit and the electric boiler heat supply unit. A water side outlet of the electric boiler heat supply unit is connected with a heat supply network water supply pipeline. A heat source fluid outlet and a heat source fluid inlet of the electric heat pump unit are respectively connected with a geothermal water return pipeline and a geothermal water inlet pipeline. A high-temperature water side inlet of the electric heat pump unit is connected with a heat supply network water return pipeline, and a high-temperature water side outlet of the electric heat pump unit is connected with a water side inlet of the electric boiler heat supply unit. Three energy sources of wind energy, solar energy and geothermal energy are comprehensively utilized for heat supply, the system is clean and free of pollution, carbon emission can be reduced, clean heating is promoted, new energy is developed, and construction of a clean, low-carbon, safe and efficient modern energy system is greatly promoted.

Description

technical field [0001] The invention belongs to the field of cogeneration of heat and power, and relates to a distributed heating system based on the comprehensive utilization of various clean energy sources. Background technique [0002] At present, in northern China, combined heat and power units are the main heat source for central heating in cities and towns, and bear the basic load of heating supply. In addition, there are also peak heat sources in cities and towns, and most of the peak heat sources use coal-fired boilers to bear the peak load in the cold season. Or as a backup heat source in an accident state, with the advancement of clean heating in cities and towns, coal-fired boiler rooms are gradually being banned or replaced; in addition, with the rapid development of central heating, the heating radius and the scale of central heating large, resulting in a mismatch between the thermal power plant and the heat load on the spatial scale. Although long-distance tran...

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Problems solved by technology

[0002] At present, in northern China, combined heat and power units are the main heat source for central heating in cities and towns, and bear the basic load of heating supply. In addition, there are also peak heat sources in cities and towns, and most of the peak heat sources use coal-fired boilers to bear the peak load in the cold season. Or as a backup heat source in an accident state, with the promotion of clean heating in cities and towns, coal-fired boiler rooms are gradually being banned or replaced; in addition, with the rapid development of central heating, the heating radius and the scale of central heating large, resulting in a mismatch between the thermal power plant and the heat load on the spatial scale. Although long-distance transportation can solve this problem, it also brings new problems, including large energy loss, high initial investment, complicated maintenance of the pipe network, The hidden dangers of heating safety have increased, so large-scale heating pipe networks need to organically combine central heating and distributed heating

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