Solar power and biomass power complementing organic Rankine cycle cogeneration system

Abstract

A solar power and biomass power complementing organic Rankine cycle cogeneration system comprises an organic working fluid vaporizer, a circulating pump, a circulating fluid bed biomass gasifier, a parabolic groove type solar collector, a turbine, a generator, a waste heat exchanger and a condenser, wherein the circulating fluid bed biomass gasifier and the parabolic groove type solar collector are coupled in a shunt-wound manner. The connecting relationship among all the component of the system is that low-temperature heat exchange fluid outflowing from the organic working fluid vaporizer is divided into two parts by the circulating pump, one part enters the circulating fluid bed biomass gasifier to be heated, and the other part is heated by the parabolic groove type solar collector; after reaching a set parameter of the outlet of the biomass gasifier, the heated fluid enters the organic working fluid vaporizer to release heat to organic working fluid; the heated organic working fluid enters the turbine for doing work when reaching a nominal parameter to drive the generator to generate power; and exhaust of the turbine is subjected to heat release by the waste heat exchanger, then is subjected to condensation by the condenser and then returns to the organic working fluid vaporizer so as to complete the whole thermodynamic cycle.

Description

technical field [0001] The invention relates to a comprehensive complementary thermoelectric system of solar energy and biomass energy based on an organic Rankine cycle, in particular to a parabolic trough solar heat collector and a circulating fluidized bed biomass gasification furnace using a parallel coupling mode, which belongs to the field of renewable energy utilization . Background technique [0002] In my country, thermal power units are responsible for about 80% of the power generation, and the annual coal consumption accounts for nearly 50% of the total consumption. The coal-based energy structure makes my country face severe resource and environmental problems. Therefore, it is important to seek new alternative energy sources. Energy strategy issues that need to be resolved urgently at this stage. In recent years, new energy has attracted widespread attention due to its renewable and non-polluting advantages, which will have great significance for my country's adj...

AI Technical Summary

Problems solved by technology

[0006] 1. For the selection of circulating working medium for solar energy and biomass energy complementary power generation system, Chinese invention patent: a combined thermal power generation system with comprehensive complementary solar energy and biomass energy, the patent number is: 201019026107.2, the patent uses water as the Rankine cycle The boiling point and latent heat of vaporization of the working fluid, water, are higher than those of the organic working fluid, so the requirements for the working intensity of the solar collector and the biomass energy gasification device are high, and the system is relatively complicated

[0007] 2. Solar energy and biomass energy are coupled in series instead of in parallel. Chinese invention patent: low-temperature solar energy-biomass energy cogeneration system, patent number: 201010237550.7. The thermal medium is preheated by the vacuum flat-plate solar collector and sent to the biomass gasifier to continue absorbing heat. Because the two are integrated in series, the system cannot operate normally when the biomass gasifier fails. low security

Images