Slot type solar direct expansion type combined heat and power generation system adopting non-azeotropic working media

Abstract

The invention belongs to the technical field of solar photo-thermal utilization, and discloses a slot type solar direct expansion type combined heat and power generation system adopting non-azeotropicworking media. The system comprises a slot type solar heat collector, a gas-liquid separator, a first working medium pump, an energy storage device, an expanding machine, a generator, a transformer,a condenser, a second working medium pump, a liquid storage tank, a third working medium pump, a user, a first valve, a second valve, a third valve and a fourth valve. Re-circulating DVG is formed bythe slot type solar heat collector, the gas-liquid separator and the first working medium pump. The non-azeotropic working media are adopted as a heat collection working medium in the slot type solarheat collector and an acting working medium in the expanding machine, and non-azeotropic working media R245fa / R152a with the proportion being 0.65 / 0.35 are preferably selected as the non-azeotropic working media. The system is improved from the aspects of component structures and circulating working media, the system cost can be reduced, the temperature and pressure of system running can be reduced, safety and stability of the system can be improved, and the solar comprehensive utilization rate can be improved.

Description

technical field [0001] The invention belongs to the technical field of solar photothermal utilization, and more specifically relates to a trough-type solar direct expansion heat and power cogeneration system using a non-azeotropic working medium as a heat-collecting working medium. Background technique [0002] With the progress of society and the development of economy, problems such as energy shortage and environmental pollution are becoming more and more serious. The development and utilization of efficient and clean new energy technologies have become the focus of research in various countries. As one of the effective ways to solve these problems, the distributed energy system has attracted widespread attention at home and abroad. Distributed energy systems are directly oriented to users, and produce and supply energy locally according to users' needs. It has the advantages of small scale, limited land use, and low cost. As a mature distributed energy system, the combin...

AI Technical Summary

Problems solved by technology

Moreover, water, as a wet working medium, needs to undergo wet expansion in the expander, and the outlet state of the working medium may enter the two-phase region, which is not good for the components.

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