A single expander realizes thermal energy cascade time-sharing organic Rankine cycle device and method

Abstract

The invention discloses an organic Rankine cycle device and method realizing thermal energy stepped time-shared using through a single expansion machine. An organic Rankine cycle system comprises a closed loop formed by sequentially connecting a working medium pump (1), the end B of a first controller (2), a heat exchanger (3), a second controller (10), the expansion machine (13), a heat storage device (9) and the end C of the first controller (2), and a closed loop formed by sequentially connecting the outlet end of the heat exchanger (3) with a fourth controller (8), a condenser (6), a condensation circulation pump (5), a third controller (4) and the inlet end of the heat exchanger (3). An auxiliary system comprises an other-source heat removal system (11), a heat supplying system (12) and a domestic water preheating system (7). The organic Rankine cycle device can further be provided with multiple heat storage devices with different temperatures according to the requirement, so that the repeated stepped utilization of heat sources is realized; and meanwhile external medium-low-grade heat sources can be stored to avoid wasting, and the need of heat taking at any time is met.

Description

technical field [0001] The invention relates to a time-sharing organic Rankine cycle device for realizing thermal energy cascades with a single expander, and belongs to the technical field of energy and environment. Background technique [0002] With the increasing consumption of fossil energy such as coal, oil, and natural gas, as well as the environmental burden (such as carbon dioxide emissions, etc.) brought about by energy consumption, energy and environmental issues have become a major concern of the world. In this context, the conversion of low-grade heat into electricity using an organic Rankine cycle has attracted increasing attention. The so-called organic Rankine cycle means that in the traditional Rankine cycle, organic working fluid (such as R113, R123, etc.) is used instead of water as the working fluid to push the expander to do work. [0003] With the continuous development of science and technology and the rising of energy prices, the ways of improving the ...

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Problems solved by technology

[0004] In reality, some energy supply is affected by time. It can provide high-quality heat for a period of time, but there is no source of heat energy for a period of time, such as solar energy and some factory waste heat. In this case, the organic Rankine cycle cannot continuously provide external power

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