Abstract: Embodiments of the present disclosure relate to a condenser assembly for a heating, ventilation, and/or air conditioning (HVAC) system that includes a condenser coil having a plurality of tubes configured to flow a refrigerant therethrough for heat transfer between the refrigerant and a flow of air passing across the plurality of tubes, and a porous material having a plurality of fluid retaining passages, in which the plurality of fluid retaining passages is configured to receive a fluid and enable the flow of air to pass through the porous material and transfer of thermal energy to between the fluid and the flow of air. The porous material is disposed upstream of the condenser coil with respect to the flow of air such that the flow of air passes through the porous material before passing across the plurality of tubes.

Abstract: The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system that has a first circuit and a second circuit that each have a compressor and a condenser, a conduit extending from the second circuit downstream of the condenser to the first circuit upstream of the compressor, a valve along the conduit that may manage flow therethrough, and a controller that may operate the HVAC system in a first mode such that each circuit separately circulates the refrigerant in each circuit and transition to a second mode such that refrigerant-sharing occurs between the circuits. In response to a request to transition from the second mode to the first mode, the controller may determine an amount of refrigerant subcooling, compare the amount to a threshold value associated with the first mode, and instruct opening of the valve upon a determination that the amount is less than the threshold value.

Abstract: Embodiments of the present disclosure relate to a condenser assembly for a heating, ventilation, and/or air conditioning (HVAC) system that includes a condenser coil having a plurality of tubes configured to flow a refrigerant therethrough for heat transfer between the refrigerant and a flow of air passing across the plurality of tubes, and a porous material having a plurality of fluid retaining passages, in which the plurality of fluid retaining passages is configured to receive a fluid and enable the flow of air to pass through the porous material and transfer of thermal energy to between the fluid and the flow of air. The porous material is disposed upstream of the condenser coil with respect to the flow of air such that the flow of air passes through the porous material before passing across the plurality of tubes.

Abstract: The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system that has a first circuit and a second circuit that each have a compressor and a condenser, a conduit extending from the second circuit downstream of the condenser to the first circuit upstream of the compressor, a valve along the conduit that may manage flow therethrough, and a controller that may operate the HVAC system in a first mode such that each circuit separately circulates the refrigerant in each circuit and transition to a second mode such that refrigerant-sharing occurs between the circuits. In response to a request to transition from the second mode to the first mode, the controller may determine an amount of refrigerant subcooling, compare the amount to a threshold value associated with the first mode, and instruct opening of the valve upon a determination that the amount is less than the threshold value.