Patent ID: 11874022
Assignee: HAMFOP TECHNOLOGIES LLC
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC H  F  Y | IPC F

Claim 17:
18. A method of operating a heat-activated multiphase fluid-operated pump for heating a building, comprising:
applying external heat to an evaporator to convert a liquid phase of a working fluid therein to a vapor phase of the working fluid, the evaporator located underground at a substantially constant earth temperature serving as a heat source for the working fluid;
allowing, whenever a set target pressure in the evaporator is exceeded, the vapor phase of the working fluid to escape into a liquid-piston chamber through a pressure-control safety valve coupled to an exit port of the evaporator, the vapor phase of the working fluid expanding adiabatically and displacing liquid within the liquid-piston chamber to expel the displaced liquid from the liquid-piston chamber through a second exit port with a unidirectional pump-exit check valve in a pumping stage of a thermodynamic cycle;
returning jets of a liquid phase of the working fluid to the evaporator, through a first exit port of the liquid-piston chamber coupled to a unidirectional injector return check valve leading to an input port of the evaporator, in period pressure pulses from the liquid-piston chamber that temporarily exceed the pressure in the evaporator;
receiving the displaced liquid from the liquid-piston chamber in a heat exchanger coupled to the unidirectional pump-exit check valve;
allowing condensed the displaced liquid in the heat exchanger to return through a unidirectional liquid suction-entry check valve coupled to a return port of the liquid-piston chamber in a suction stage of the thermodynamic cycle, the liquid returning to the liquid-piston chamber through heating lines in one or more rooms of a building to radiate heat to the rooms; and
repeating the foregoing steps in multiple thermodynamic cycles.