Wind-light-storage island-type combined cooling, heating and power system based on solar light-heat utilization

Abstract

The invention provides a wind-light-storage island-type combined cooling, heating and power system based on solar light-heat utilization. The system comprises a wind energy conversion system, a solar heat collecting system, a micro compressed air energy-storage system and a heat storage system. When wind speed is high, surplus electric energy drives a multistage compressor to compress air from a level of atmospheric pressure to a higher level of pressure to be stored into a compressed air storage pipeline, and heat in the process of compressing is recovered into the heat storage system, at the moment, supplying of cold energy and heat energy is realized after pumped thermal-state heat conducting oil is shunted and enters an absorption-type refrigerating system and a heating system. When the wind speed is low, after absorbing heat from the heat storage system, compressed air enters a turbine to expand for doing work so as to fill a demand gap of electric energy, so that demands of a user on cold energy and heat energy are met through the thermal-state heat conducting oil.

Description

technical field [0001] The invention belongs to the field of renewable energy utilization, and relates to a wind-solar-storage island-type combined cooling, heating and power supply system based on solar light and heat utilization. Background technique [0002] Energy is the material basis for human survival and development, and an important factor restricting the sustainable and stable development of the economy. In recent years, with the rapid growth of social economy and total population, problems such as conventional energy shortage, greenhouse gas emissions and environmental pollution have become increasingly serious. Especially in my country, due to the long-term existence of an irrational energy structure dominated by fossil energy, the pressure on my country's energy supply, environmental protection, and response to climate change is increasing day by day. Therefore, energy utilization urgently needs to transform to green energy, and the development and utilization ...

AI Technical Summary

Problems solved by technology

[0004] At present, the main configuration form of the wind-solar-storage island-type combined energy supply system based on renewable energy is "wind turbine-photovoltaic-energy storage device". , while there are few related research works on solar thermal utilization

Both the photovoltaic power generation system and the wind power generation system are independent systems, and the complementary joint system only utilizes the complementarity of wind energy and solar energy in time distribution, but does not deeply integrate and utilize these two energy sources, so the energy utilization efficiency is not high

Secondly, the island-type energy supply system should have the capability of diversifying energy supply, while the existing wind-solar-storage complementary island-type joint energy supply system is a system of multi-energy input and single-energy (electric energy) output type, which only provides electric energy for users, while The supply of cold energy and heat energy needs to be converted by electric energy. There is an energy conversion process from high-grade electric energy to low-grade heat energy, which causes energy waste and does not conform to the principle of energy cascade utilization.

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