ORC power generation device with automatic liquid level adjusting function and adjusting method thereof

Abstract

The invention discloses an ORC power generation device with an automatic liquid level adjusting function. The ORC power generation device comprises an evaporator, an expansion machine, a condenser anda working medium pump sequentially connected through a main pipeline, wherein the evaporator is connected with an external heat source, and an evaporator liquid level meter is arranged on the evaporator; a main path adjusting valve is arranged between the evaporator and the working medium pump; a bypass pipeline is arranged between the output end of the expansion machine and the output end of theworking medium pump, and a bypass adjusting valve is arranged on the bypass pipeline; and a power unit is connected to the expansion machine. According to the ORC power generation device with the automatic liquid level adjusting function, in the normal machine starting, running and machine stopping processes, when the fluctuation range of heat source parameters is small, a liquid level deviationsignal can be fed back to the main path adjusting valve and the bypass adjusting valve at an outlet of the working medium pump in time, and the main path adjusting valve and the bypass adjusting valveautomatically act, so that a liquid level value returns to a set value, and the internal circulation stability of the ORC power generation device is ensured.

Description

technical field [0001] The invention belongs to the technical field of organic Rankine cycle power generation, and in particular relates to an ORC power generation device with automatic liquid level adjustment and an adjustment method. Background technique [0002] Organic Rankine cycle (ORC) power generation technology is more and more widely used in industrial waste heat, solar energy, geothermal and other waste heat utilization industries, with a single unit capacity ranging from tens of kilowatts to several megawatts. At present, in the field of industrial waste heat utilization, power generation technology is a relatively reasonable utilization scheme. Due to its own characteristics such as high condensation pressure, large sensible / latent heat ratio, and the use of dry working fluid, compared with the traditional water vapor Rankine cycle, its The field of low temperature power generation has the characteristics of simple system and high heat utilization rate. [0003...

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Problems solved by technology

[0003] Due to its working characteristics, industrial waste heat is bound to be affected by the operating conditions of upstream equipment, so it will be in a state of constant fluctuation. This requires the operation control of the Organic Rankine Cycle (ORC) generator set to be as simple as possible, and can automatically adapt to the waste heat. Parameter changes do not require manual active intervention control. The current automatic control method of the Organic Rankine Cycle (ORC) generator set is to adjust the liquid level and adjust the speed (see CN201710611225.4), but this automatic adjustment method It is necessary to constantly adjust the speed of the working medium pump, which greatly reduces the service life of the working medium pump

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