Design method for parabolic trough solar heat collecting system

Abstract

The invention discloses a design method for a parabolic trough solar heat collecting system, comprising the steps of firstly, confirming the basic geometric structure of the heat collecting system and establishing a parameterized geometric model of a single heat collecting loop according to a local meteorological parameter, the geometric size of a heat collecting system mounting place and a system use condition; next, establishing a three-dimensional optical calculation model of the loop by using a Monte Carlo ray tracing method, and carrying out optical calculation to obtain the annual any-moment time-by-time comprehensive optical property of the loop; then, calculating the annual time-by-time comprehensive heat production property and annual total heat production of the single heat collecting loop by using a one-dimensional photothermal conversion calculation model for a loop heat collecting pipe; next, initially designing the total loop amount of the heat collecting system according to the design requirement for the annual total heat production of the system; and finally, initially designing the annual heat production of the heat collecting system through evaluating, and carrying out optimization calculation on the loop amount to finish the design of the heat collecting system. By using the design method, the structure and comprehensive photothermal property of the parabolic trough solar heat collecting system can be rapidly and effectively designed.

Description

technical field [0001] The invention belongs to the technical field of concentrating solar heat utilization, and particularly relates to a design method of a trough concentrating solar heat collecting system. Background technique [0002] The increasing depletion of fossil energy, the environmental problems brought about by energy utilization and the increasing demand for energy due to rapid social development all require the world to accelerate the development of renewable energy utilization technologies. In recent years, major energy countries have issued a series of laws, regulations and policy measures to take action to accelerate the development and utilization of renewable energy. Solar energy is an abundant, clean and widely accessible renewable energy source. In solar energy utilization technology, trough concentrating solar energy technology is a promising solar thermal utilization technology. Among them, the fast, efficient, and high-precision automatic design an...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a design that can effectively complete the three-dimensional parameterized geometric model, optical calculation model and heat transfer calculation model of the trough-type concentrated solar heat collection system, and quickly and effectively carry out the structure and synthesis of the trough-type concentrated solar heat collection system. Photothermal performance design, design method of trough-type concentrating solar heat collection system to solve system automatic design problems

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