Solar heat and power cogeneration system based on diplex thermodynamic cycle and its application method

Abstract

The invention discloses a solar cogeneration system and method based on a double-working medium thermodynamic cycle, and belongs to the technical field of new energy solar thermal power generation. The solar cogeneration system based on the double-working medium thermodynamic cycle comprises a conventional rankine cycle which adopts steam directly produced by solar heat collection as a cycling working medium, and a low-temperature organic rankine cycle which adopts part of steam exhausted by the previous cycle as a heat source; the solar cogeneration system based on the double-working medium thermodynamic cycle mainly comprises a solar heat collection system, a conventional combined steam heating and power system and a low-temperature rankine generation system. The solar cogeneration system and method based on the double-working medium thermodynamic cycle has the advantages that the low-cost, relatively-mature, relatively-reliable and low-concentration ratio heat collection method is utilized for directly producing the steam with certain pressure parameters, and the steam is used for pushing a thermoelectric unit to generate power and heat supply, and thus the solar heat comprehensive utilization energy supply based on multi-energy compensating, combined cooling heating and power is realized.

Description

technical field [0001] The invention proposes a solar heat and power cogeneration system based on a duplex thermodynamic cycle and an application method thereof, belonging to the technical field of new energy solar thermal power generation. Background technique [0002] Solar energy is an important renewable resource, which is widely distributed and suitable for local development and utilization. It is the most reliable way for human sustainable development. Solar power generation technology is the main way of large-scale commercial utilization of solar energy. It can be used for photovoltaic power generation and solar thermal power generation. Although the former has developed explosively in the past ten years, it is sustainable, environmentally friendly, and heat storage. In terms of coupling with conventional energy sources, the latter has stronger advantages. The areas rich in solar energy resources in China are mainly concentrated in the economically backward northwest...

AI Technical Summary

Problems solved by technology

According to the distribution of solar resource conditions, large-scale, high-parameter solar thermal power generation technology is only suitable for economically backward areas in the remote northwest and sparsely populated areas. It can only perform a single power generation method, and it is difficult to achieve comprehensive utilization of solar energy in combined heat and power generation. , the overall efficiency of the power station is low, and a large and expensive thermal storage system needs to be configured, and the generated electric energy needs to be invested in the construction of an independent power grid for long-distance transmission, which has huge investment and operating costs

Under the conditions of the current technical level of solar high temperature thermal power generation and the limited support policies of the state, it is difficult for large-scale commercial development of solar high temperature thermal power generation technology

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