Hybrid power plant with waste heat recovery system

A hybrid power plant system comprising:

• an engine including an exhaust system;
• an exhaust cooler in fluid communication with the exhaust system;
• a working fluid loop in fluid communication with the exhaust cooler and configured to receive heat from the exhaust system, and an expander arranged in the working fluid loop;
• a first pump configured to be rotationally driven by the expander, the first pump arranged in the working fluid loop and configured to pump working fluid therethrough in response to rotation from the expander;
• and
• a second pump arranged in the working fluid loop and configured to pump the working fluid therethrough in a bypass mode, the bypass mode causing the working fluid to bypass the expander and the first pump in response to an operating condition of the hybrid power plant system.

A hybrid power plant system comprising:

• an engine including an exhaust system;
• an exhaust cooler in fluid communication with the exhaust system;
• a liquid coolant loop in fluid communication with the engine, the liquid cooling loop including a coolant bypass loop;
• a working fluid loop in fluid communication with the exhaust cooler and configured to receive heat from the exhaust system, the working fluid loop including an expander bypass loop;
• an expander arranged in the working fluid loop downstream from the exhaust cooler, the expander configured to drive an alternator;
• a heater core in fluid communication with the coolant bypass loop and the expander bypass loop;
• a bypass control system including at least one control valve arranged in the working fluid loop and configured to divert working fluid in the working fluid loop through the expander bypass loop around the expander and to the heater core in response to an operating condition of the hybrid power plant system;
• and
• a pump arranged in the working fluid loop and driven by the expander in a charging mode, the at least one valve configured to divert working fluid in the working fluid loop through the expander bypass loop around the pump and to the heater core in response to the operating condition.