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

Claim 9:
10. A method of operating a heat-activated multiphase fluid-operated pump for cooling 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;
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 a 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 fluid to the evaporator through an input port of the evaporator coupled to a unidirectional injector return check valve in period pressure pulses from a first exit port of the liquid-piston chamber when the liquid phase of the working fluid temporarily exceeds 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, the heat exchanger located underground at a substantially constant earth temperature to serve as a heat sink;
allowing 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 cooling lines in one or more rooms of a building; and
repeating the foregoing steps in multiple thermodynamic cycles.