Heat source shunting type waste heat power generation system and optimization control method thereof

Abstract

The invention discloses a heat source shunting type waste heat power generation system and an optimization control method thereof. The heat source shunting type waste heat power generation system comprises an evaporator and a preheater, wherein the evaporator is connected with an expansion machine, the preheater is connected with a working medium pump, the working medium pump is connected with a condenser, the expansion machine is connected with the condenser, the condenser is connected with a cold water pump, and the cold water pump is connected with a cold water pipe. The optimization control method comprises the steps: setting a variable change interval based on a genetic algorithm of Matlab, encoding population individuals in the change interval, and obtaining the optimal evaporation temperature <tevaapos>, the optimal primary split ratio <rsp1apos>, the optimal secondary split ratio <rsp2apos> and the maximum net output power W < netapos > by using the genetic algorithm; and optimizing the flow in a process hot water branch pipe and the evaporator. According to the heat source shunting type waste heat power generation system and the optimization control method thereof, the operation optimization target of the maximum net output work in the waste heat power generation circulation process, the flow dividing ratio of two flow dividing units is determined, then the valve position flow of four valves is adjusted, and therefore the optimal working condition operation is achieved.

Description

technical field [0001] The invention relates to the technical field of waste heat power generation, in particular to a heat source split type waste heat power generation system and an optimization control method thereof. Background technique [0002] Organic Rankine Cycle (ORC) is a technology in the chemical industry that uses waste heat to generate electricity. After the organic Rankine cycle system design and equipment selection are completed, due to the uncertainty of the external environment and some operating conditions, the actual operating conditions will often be different from the designed operating conditions, mainly reflected in the changes in the cold source and heat source. It is difficult to obtain the maximum net output power in actual operation. Moreover, the existing research has not simulated and optimized the actual operation of Organic Rankine Cycle (ORC) from the theory and optimization algorithm. Therefore, the present invention proposes a heat sourc...

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Problems solved by technology

After the organic Rankine cycle system design and equipment selection are completed, due to the uncertainty of the external environment and some operating conditions, the actual operating conditions will often be different from the designed operating conditions, mainly reflected in the changes in the cold source and heat source. It is difficult to obtain the maximum net output power in actual operation

Moreover, the existing research has not simulated and optimized the actual operation of the Organic Rankine Cycle (ORC) from the theory and optimization algorithm.

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