| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust heat recovery device of an internal combustion engine, which has a heat pump to generate steam using, as a heat absorption source, heat quantity of either a lubricant system of the internal combustion engine or a closed type circulating cooling water system directly cooling the internal combustion engine, capable of generating steam without increasing power consumption or fuel consumption or without practically using power or fuel.SOLUTION: An exhaust heat recovery device of an internal combustion engine comprises: an exhaust heat recovery boiler which generates steam by recovering heat from combustion exhaust of the internal combustion engine; and a heat pump which also generates the steam with lubricant of the internal combustion engine or engine cooling liquid as a heat absorption source. The exhaust heat recovery boiler is configured to generate super-heated steam. The heat pump has a back-pressure type steam turbine which uses the super-heated steam generated by the exhaust heat recovery boiler as drive steam, a drive source, of a compressor to compress a cooling medium or the steam inside the heat pump. Exhaust stem from the back-pressure type steam turbine is used as supply steam to a steam demander. |
