Diesel generator cogeneration device based on ORC (organic Rankine cycle) system

Abstract

The invention discloses a diesel generator cogeneration device based on an ORC (organic Rankine cycle) system. The diesel generator cogeneration device comprises an ORC refrigerant cycle system, an engine jacket water cycle system, an engine tail gas system, a pressurized air system and an external cooling water system. The diesel generator cogeneration device disclosed by the invention has the most outstanding feature that after the whole generation device normally runs, as a water tank and an intercooler of an engine do not need to work, the power output, to a fan, of a diesel generator can be directly cut off, and therefore, net generation externally output is greatly increased. The diesel generator cogeneration device disclosed by the invention has another outstanding feature that the heat of the cylinder wall of the engine and the tail gas of the engine is fully absorbed for a carrier by utilizing engine jacket water, and therefore, the problem that the local high-temperature failure of refrigerant is brought by the fact that heat exchange is directly performed between the ORC refrigerant and high-temperature exhaust gas is avoided. All components of the system are effectively controlled, and the waste heat of the engine is recycled, and therefore, the generating capacity of the unit fuel consumption of the engine is improved, and the return on investment cycle of the generator is shortened.

Description

technical field [0001] The invention relates to an engine waste heat recovery system, in particular to an organic Rankine cycle engine waste heat recovery system. That is, it is a system device based on organic Rankine cycle engine waste heat recovery and utilization, using refrigerant (such as R245fa) to absorb heat from engine exhaust, cylinder jacket water and pressurized air, and through the four stages of Rankine cycle to perform external work Power generation, a system device that realizes the recovery and reuse of waste heat from the engine. Background technique [0002] With the aggravation of energy shortage, it is becoming more and more important to improve the utilization efficiency of energy. Energy saving and emission reduction has become the most important topic at present. The ORC system based on the organic Rankine cycle is a good technology to improve energy utilization efficiency for the utilization of various industrial waste heat or waste heat. [0003...

AI Technical Summary

Problems solved by technology

[0006] Based on the existing published technical patents, there is a direct use of engine exhaust to heat the ORC refrigerant, but because the temperature of the engine exhaust generally exceeds 500 ° C, this will cause the cracking of the ORC refrigerant to fail at local high temperatures

In the existing public technology, heat transfer oil is also used to absorb the heat of engine exhaust, but adding a new oil circuit system leads to complicated cost and control and limited application and promotion

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