An organic rankine cycle system with phase change energy storage device

Abstract

The invention relates to an organic Rankin cycle system with a phase change energy storage device. The organic Rankin cycle system comprises a preheater, an evaporator, a superheater, a phase change heat storage device, a heat-into-power conversion device, a load, a precooler, a condenser, a super-cooler, a phase change cold storage device, a working medium pump and the like, wherein the preheater, the evaporator and the superheater form a loop A1, the precooler, the condenser and the super-cooler form a loop A2, the preheater, the phase change heat storage device and the superheater form a loop B1, the precooler, the phase change cold storage device and the super-cooler form a loop B2, and electric three-way valves are mounted on inlets and outlets of the loops, so that different loops are switched under different working conditions. The organic Rankin cycle system is effectively applied to cross-correlation fields of low-grade heat source recycling and new energy utilization, isothermal heat exchange of circulating working media and the phase change energy storage device is achieved, the energy efficiency of the system is effectively improved, different heat exchange processes are decomposed into different heat exchangers, and the flow resistance of the circulating working media in the heat exchangers can be effectively reduced.

Description

technical field [0001] The invention relates to an organic Rankine cycle system with a phase-change energy storage device, which is an improvement on the performance of the traditional organic Rankine cycle system, and belongs to the intersection field of low-grade heat source recovery and new energy utilization. Background technique [0002] Organic Rankine cycle is a technology to efficiently recover low-grade heat sources, which is receiving more and more attention. The heat exchanger is an important part of the organic Rankine cycle system, and the circulating working fluid exchanges heat with the external heat source and cold source in the heat exchanger. In the traditional organic Rankine cycle system, the working fluid is preheated, evaporated, superheated or precooled, condensed, and supercooled in the heat exchanger, and the temperature of the heat source or cold source continuously drops or rises in the heat exchanger. Or during the condensation process, the tempe...

AI Technical Summary

Problems solved by technology

In the traditional organic Rankine cycle system, the working fluid is preheated, evaporated, superheated or precooled, condensed, and supercooled in the heat exchanger, and the temperature of the heat source or cold source continuously drops or rises in the heat exchanger. Or during the condensation process, the temperature of the working fluid remains unchanged, the heat transfer temperature difference between the heat transfer medium is large, the exergy loss is large, and the exergy efficiency is low

Images