Single-stage gravity pump organic Rankine power generation and heat supply combined system and cycle thereof

Abstract

The invention provides a single-stage gravity pump organic Rankine power generation and heat supply combined system and a cycle of the combined system, wherein the combined system comprises a circulation power generation closed loop formed by sequentially connecting an evaporator, an expansion machine and a condenser, the expansion machine is externally connected with a power generator, the condenser comprises an organic working medium pipeline and a circulation water pipeline, low-boiling-point organic working media release heat to circulation water in the condenser, the circulation water pipeline is connected with a floor heating pipeline through a regulating valve, the floor heating pipeline is then connected with the circulation water pipeline through a circulation water pump, and a floor heating closed loop is formed; the circulation power generation closed loop and the floor heating closed loop form the combined system. The pressure difference of the organic working media is utilized for replacing working medium conveying equipment of a working medium pump, the heat energy is directly converted into the pressure difference required by the circulation, and the working medium pressurization and the application of the conveying equipment are avoided.

Description

technical field [0001] The invention belongs to the field of low-grade heat energy development and recycling, and specifically relates to a single-stage gravity pump organic Rankine power generation and heat supply combined system and its cycle. Background technique [0002] Against the backdrop of ever-expanding energy demand and decreasing fossil energy, low-grade energy, including low-temperature geothermal energy, low-temperature solar thermal energy, and low-temperature industrial waste heat energy, has gradually received more attention. Compared with conventional thermal power generation technology, organic Rankine cycle technology has significant advantages in the field of low-grade thermal energy development and recycling, and can greatly improve thermal energy utilization efficiency. [0003] The organic working fluids used in the organic Rankine cycle generally include HCFCs, HFCs and HCs, etc. These organic working fluids generally have one or more shortcomings in...

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Problems solved by technology

[0005] In view of this, the present invention provides a single-stage gravity pump organic Rankine power generation and heat supply combined system and its circulation, which replaces the working medium delivery equipment-working medium pump through the pressure difference of the organic working medium, so as to solve the difficult problem of sealing, and at the same time Floor heating closed loop improves energy efficiency

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