Double hybrid heat pumps and systems and methods of use and operations

A heating and cooling system for a structure comprising:

• a heat pump comprising:
• a compressor for compressing a low-pressure vapor refrigerant to high-pressure vapor refrigerant;
• a refrigerant condensing heat exchanger, wherein the condensing heat exchanger heats water using heat exchanged from the high-pressure vapor refrigerant to output one of a high-pressure liquid refrigerant and a high-pressure two-phase vapor-liquid refrigerant, where water from the water storage tank provides at least one of hot water for heating and domestic use in the structure;
• a refrigerant cooling heat exchanger to further cool high-pressure liquid refrigerant and condense high-pressure vapor refrigerant received from the condensing heat exchanger;
• an expansion valve connected to the cooling heat exchanger to induce a pressure drop in the high-pressure liquid refrigerant to output one a low-pressure liquid refrigerant and low-pressure two-phase vapor-liquid refrigerant;
• a refrigerant evaporating heat exchanger connected to the expansion valve to vaporize the low-pressure liquid refrigerant and provide the low-pressure vapor refrigerant to the compressor;
• a first reversing element having a heating mode and cooling mode, where
• in the heating mode the first reversing element directs refrigerant flow from the condensing heat exchanger to a refrigerant to air heat exchanger serving as the refrigerant cooling heat exchanger and the refrigerant evaporating heat exchanger is a refrigerant to source heat exchanger, and
• in the cooling mode the first reversing element directs refrigerant flow from the condensing heat exchanger to the refrigerant to source heat exchanger serving as the refrigerant cooling heat exchanger and the refrigerant evaporating heat exchanger is the refrigerant to air heat exchanger;
• a second reversing element configured to reverse refrigerant flow through the refrigerant to source heat exchanger;
• and
• at least one blower coupled to the refrigerant to air heat exchanger to provide one of cool air from the refrigerant to air heat exchanger and hot air from the refrigerant to air heat exchanger to the structure.

A method of providing heated or cooled air and heated water, comprising:

• compressing, by a compressor, a low-pressure vapor refrigerant to high-pressure vapor refrigerant;
• condensing, by a refrigerant condensing heat exchanger, at least a portion of the high-pressure vapor refrigerant to transfer heat from the refrigerant to water for at least one of heating and domestic use and produce a high-pressure liquid phase refrigerant;
• subcooling, via a refrigerant subcooling heat exchanger, the high-pressure liquid refrigerant;
• expanding, via an expansion valve, the subcooled high-pressure liquid refrigerant to produce a low-pressure cooled liquid refrigerant;
• evaporating, via a refrigerant evaporating heat exchanger, the low-pressure cooled liquid refrigerant to provide the low-pressure vapor refrigerant to the compressor;
• and
• circulating air, via at least one blower, to provide one of cool air from the evaporating heat exchanger and hot air from the cooling heat exchanger to an outlet for cooling and heating.