Flow distribution type carbon dioxide power circulation system used for internal combustion engine waste heat recovery

Abstract

The invention discloses three types of flow distribution carbon dioxide circulation systems based on internal combustion engine waste heat utilization. The three types of flow distribution carbon dioxide circulation systems include the low-temperature flow distribution carbon dioxide circulation system, a medium-temperature flow distribution carbon dioxide circulation system and a high-temperature flow distribution carbon dioxide circulation system. The three types of systems mentioned above each comprise specific parts, namely, a working medium pump, a cylinder sleeve cooling water heat exchanger, an intermediate heat exchanger, a low-temperature grade smoke heat exchanger, a high-temperature grade smoke heat exchanger, an expansion electricity generation integrated machine and a condenser. In the flow distribution carbon dioxide circulation systems suitable for internal combustion engine waste heat recovery, waste heat of the two parts, namely, internal combustion engine tail gas and internal combustion engine cylinder sleeve water, is efficiently and sufficiently absorbed and utilized at the same time through the adoption of trans-critical or super-critical carbon dioxide power circulation and through the different heat exchangers, and the system acting capacity is further improved by adopting a flow distribution system.

Description

technical field [0001] The invention belongs to the field of recovery and utilization of waste heat of internal combustion engines, and specifically proposes three split carbon dioxide circulation systems suitable for recovery of waste heat of internal combustion engines, and particularly relates to a split carbon dioxide power cycle system for recovery of waste heat of internal combustion engines. Background technique [0002] Energy saving and emission reduction have become one of the goals pursued by major power plants at home and abroad, and the utilization of waste heat from internal combustion engines is recognized as the most potential energy-saving measure. From the perspective of the current energy balance of internal combustion engines, the power output generally only accounts for 30%-45% of the total heat of fuel combustion (diesel engine), and the remaining more than 60% of the waste heat energy has not been utilized, but through the heat dissipation and exhaust o...

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Problems solved by technology

However, due to the low system efficiency and low output power compared with organic working fluids, the system's working ability is restricted.

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