Heat engine shuttle pump system and method

A method of transferring working fluid with a he engine from a condenser tune of apparatus, comprising:

• a. Providing a condenser having an internal condenser pressure, said condenser having said working fluid in a liquid form, said working fluid having a first surface level;
• b. Providing an evaporator having an internal evaporator pressure, said evaporator having said working fluid in a liquid form, said working food having a second surface level, said evaporated lying below said condenser;
• c. Providing a first transfer tank below said condenser and above said evaporator;
• d. Providing a first fill line leading from said condenser two said first transfer tank;
• e. Providing a first down blind leading from said first transfer tank two said evaporator;
• f. Providing a first flow control valve in said first fill line, said first flow control valve allowing flow from said condenser to said first transfer tank but preventing flow from said first transfer tank back to said condenser;
• g. Providing a second flow control valve in said first dump line, said second flow control valve allowing flow from said first transfer tank to said evaporator but preventing flow from said evaporator back to said first transfer tank;
• h. Providing a first vent line leading from said first transfer tank to said condenser;
• i. Providing a second vent line leading from said first transfer tank to said evaporator, said second vent line having an opening in said evaporator that is above said second surface level of said working fluid within said evaporator;
• j. Providing a first vent control valve in said first vent line;
• k. Providing a second vent control valve in said second vent line;
• l. Opening said first vent control valve, and closing said second vent control valve;
• m. passing said liquid working fluid in said condenser through said first flow control valve and said first fill line into said first transfer tank under the influence of gravity and any gaseous working fluid contained within said first transfer tank is vented through said first vent line back to said condenser, said first vent line having an opening in said condenser that is above said first surface level of said working fluid within said condenser;
• n. Closing said first vent control valve, and opening said second vent control valve;
• and
• o. passing said liquid working fluid in said first transfer tank through said second flow control valve and said first dump line into said evaporator under the influence of gravity and gaseous working fluid with said evaporator flows through said second vent line into said first transfer tank.