HEAT ENERGY RECOVERY SYSTEM

摘要

A heat energy recovery system includes an evaporator, a superheater, an expander, a power recovery device, a condenser, a pump, and a controller. The controller includes: an engine load calculation section; a maximum rotation speed determination section for determining a maximum rotation speed of the pump which is obtained when a pinch temperature reaches a target pinch temperature, based on a relational expression representing a relationship between the engine load and the maximum rotation speed, and an engine load; and a rotation speed regulation section for regulating the rotation speed of the pump in such a way as to allow the degree of superheat of the working medium flowing into the expander to be equal to or greater than a reference value, and to allow the rotation speed to be equal to or less than a maximum rotation speed determined by the maximum rotation speed determination section.

主权项

1. A heat energy recovery system, comprising:
an evaporator for performing heat exchange between supercharged air to be supplied to an engine and working medium to thereby evaporate the working medium; a superheater for performing heat exchange between the working medium flown from the evaporator and heating medium to thereby heat the working medium; an expander for expanding the working medium flown from the superheater; a power recovery device connected to the expander; a condenser for condensing the working medium flown from the expander; a pump for causing the working medium to flow from the condenser to the evaporator; and a controller including
an engine load calculation section for calculating an engine load,a maximum rotation speed determination section for determining a maximum rotation speed which is a rotation speed of the pump obtained when a pinch temperature reaches a target pinch temperature, the pinch temperature being a value which is obtained by subtracting a saturation temperature of the working medium from a temperature of the supercharged air in the evaporator, the determination being based on a relational expression representing a relationship between the engine load and the maximum rotation speed, and an engine load calculated by the engine load calculation section, anda rotation speed regulation section for regulating the rotation speed of the pump in such a way as to allow the degree of superheat of the working medium flowing into the expander to be equal to or greater than a reference value, and to allow the rotation speed to be equal to or less than a maximum rotation speed determined by the maximum rotation speed determination section.