A heat pump system includes a refrigerant circuit comprising a compressor, a reversing valve, a first heat exchanger, a second heat exchanger, a reheat heat exchanger, and a three-way valve. The reversing valve is configured to receive refrigerant from the compressor and adjust between a first configuration to direct the refrigerant toward the three-way valve and a second configuration to direct the refrigerant toward the first heat exchanger. The three-way valve is configured to adjust between a first position to direct the refrigerant between the reversing valve and the second heat exchanger and a second position to direct the refrigerant from the reversing valve to the reheat heat exchanger.

A process for conditioning air, by means of a main circuit, the main circuit being a vapor compression circuit, wherein a first refrigerant circulates, and a secondary circuit with no compressor, wherein a non-flammable second refrigerant including a hydrofluoroolefin and/or a hydrochlorofluoroolefin circulates, the main circuit and the secondary circuit being coupled to one another; the process including a heat exchange between the surroundings and the first refrigerant, a heat exchange between the first and second refrigerants, and a heat exchange between the second refrigerant and the air to be conditioned. Also, an air conditioning plant for implementing the process.

A refrigeration system includes a main fluid loop and a secondary fluid loop. The main fluid loop includes a compressor and a heat exchanger that circulate a first working fluid. The secondary fluid loop circulates a second working fluid. The secondary fluid loop is in thermal communication with the main fluid loop at the heat exchanger. The secondary fluid loop includes a pump, a thermal energy storage, and a coil fluid line. The secondary fluid loop includes a multi-position valve configured to move between positions that selectively fluidly connect the heat exchanger, the pump, the thermal energy storage, and the coil fluid line.

A refrigeration cycle apparatus includes: a casing; an air handling unit accommodated in the casing and including a first duct and a first outlet, a second duct and a second outlet, a first fan and a second fan; and a refrigerant circuit configured to circulate refrigerant in the refrigerant circuit and including a first heat exchanger and a second heat exchanger.

A heat pump system provides at least six modes of heating, cooling, and/or domestic water heating operation, where domestic water heating may occur concurrently with heating or cooling a space in a structure. The heat pump system comprises a desuperheater positioned downstream of the compressor and operable as a desuperheater, a condenser or an evaporator, a source heat exchanger operable as either a condenser or an evaporator, a load heat exchanger operable as either a condenser or an evaporator, a reversing valve positioned downstream of the desuperheater heat exchanger and configured to alternately direct refrigerant flow from the desuperheater heat exchanger to one of the load heat exchanger and the source heat exchanger and to alternately return refrigerant flow from the other of the load heat exchanger and the source heat exchanger to the compressor, and an expansion valve positioned between the load heat exchanger and the source heat exchanger.

An HVAC system is disclosed, comprising: (a) a compressor, (b) a source heat exchanger for exchanging heat with a source fluid, (c) a first load heat exchanger operable for heating/cooling air in a space, (d) a second load heat exchanger for heating water, (e) first and second reversing valves, (f) first and second 3-way valves, (f) a bi-directional electronic expansion valve, (g) a first bi-directional valve, and (h) a second bi-directional valve to modulate exchange of heat in the first load heat exchanger when operating as an evaporator and to control flashing of the refrigerant entering the source heat exchanger when operating as an evaporator, (h) a source pump for circulating the source fluid through the first load heat exchanger, (i) a water pump for circulating water through the second load heat exchanger, and (j) a controller to control operation of the foregoing.

The reversed single-working-medium vapor combined cycle of the present invitation belongs to the field of thermodynamics, refrigeration and heat pump, which are consists of ten processes: a heat-absorption and vaporization process 1-2 of the M.sub.1 kg of working medium, a pressurization process 2-3 of the M.sub.1 kg of working medium, a heat-absorption process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 5-6 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 6-3 of the M.sub.2 kg of working medium, a heat-releasing process 6-7 of the M.sub.1 kg of working medium, a pressurization process 7-8 of the M.sub.1 kg of working medium, a heat-releasing and condensation process 8-9 of the M.sub.1 kg of working medium, a depressurization process 9-1 of the M.sub.1 kg of working medium.

The HVAC On Demand Via High And Low Pressure Vortex Separation Apparatus With Rotating Spin Chamber is a novel heating and cooling system that could revolutionize the HVAC industry. The instant invention takes in ambient air, via ducted fans, and separates hot and cold air by spinning the air molecules into a self-contained vortex. Specifically, it allows the less dense hot air molecules to pass through the front of the invention while diverting the cold air molecules through a series of reversing tubes to exit the apparatus. As the main rotating spin chamber spins ambient airflow into a centrifugal vortex in one direction, the air inlet tubes are positioned in such a way that it allows the rotating spin chamber to revolve in the opposite direction of the interior vortex. This captures all mechanical energy on the inside and outside of the vortex. The apparatus takes otherwise wasted mechanical energy and converts it into additional electrical energy. The entire invention along with understanding how air separation on a molecular scale works, allows the invention to be scaled to any size and configuration for an incredibly high efficiency rate.

A process for conditioning air, by means of a main circuit, the main circuit being a vapor compression circuit, wherein a first refrigerant circulates, and a secondary circuit with no compressor, wherein a non-flammable second refrigerant including a hydrofluoroolefin and/or a hydrochlorofluoroolefin circulates, the main circuit and the secondary circuit being coupled to one another; the process including a heat exchange between the surroundings and the first refrigerant, a heat exchange between the first and second refrigerants, and a heat exchange between the second refrigerant and the air to be conditioned. Also, an air conditioning plant for implementing the process.

A system comprising a compressor, a first valve coupled to the compressor and to a first coil, a first expansion valve coupled to the first coil, and a second expansion valve. The second expansion valve coupled to a second coil. A second valve is coupled to the second coil and the compressor. A third valve is coupled to the compressor and a third coil. In response to receiving a heating demand that is below a threshold heating demand, a controller induces an artificial heating demand.