Systems and methods for implementing air conditioning and water store systems that are configured such that a direct expansion of a heat transfer material allows for both hot and cold thermal storage are provided. In such systems, an included cold thermal energy storage unit can be cooled to a temperature lower than the temperature desired for a target space while the target space is simultaneously cooled to the desired temperature, such that the temperature desired for the target space can subsequently be established and/or maintained by the cold thermal energy storage unit irrespective of whether the cold thermal energy storage unit is being principally relied on to cool the target space or whether an included powered condensing unit is being relied on to cool the target space. In conjunction with this, hot thermal units and water in a water store can be heated. In short, the system allows for the capture of normally ejected heat in the water store.

Systems and methods for implementing air conditioning and water store systems that are configured such that a direct expansion of a heat transfer material allows for both hot and cold thermal storage are provided. In such systems, an included cold thermal energy storage unit can be cooled to a temperature lower than the temperature desired for a target space while the target space is simultaneously cooled to the desired temperature, such that the temperature desired for the target space can subsequently be established and/or maintained by the cold thermal energy storage unit irrespective of whether the cold thermal energy storage unit is being principally relied on to cool the target space or whether an included powered condensing unit is being relied on to cool the target space. In conjunction with this, hot thermal units and water in a water store can be heated. In short, the system allows for the capture of normally ejected heat in the water store.

A system includes: a housing; a hot water tank arranged within the housing and configured to store a first volume of water; a cold water tank arranged within the housing and configured to store a second volume of water; an exterior heat exchanger arranged on the housing and defining a set of fluid channels extending vertically along an exterior wall of the housing; and an interior heat exchanger thermally coupled to an interior volume of a building. The system also includes a set of valves configured to: during daytime, route the first volume between the hot water tank and the exterior heat exchanger and route the second volume between the cold water tank and the interior heat exchanger; and, during nighttime, route the first volume between the hot water tank and the interior heat exchanger and route the second volume between the cold water tank and the exterior heat exchanger.

A system includes: a housing; a hot water tank arranged within the housing and configured to store a first volume of water; a cold water tank arranged within the housing and configured to store a second volume of water; an exterior heat exchanger arranged on the housing and defining a set of fluid channels extending vertically along an exterior wall of the housing; and an interior heat exchanger thermally coupled to an interior volume of a building. The system also includes a set of valves configured to: during daytime, route the first volume between the hot water tank and the exterior heat exchanger and route the second volume between the cold water tank and the interior heat exchanger; and, during nighttime, route the first volume between the hot water tank and the interior heat exchanger and route the second volume between the cold water tank and the exterior heat exchanger.

An air-conditioning apparatus includes a refrigerant circuit and a fluid circuit. The fluid circuit includes a first branch circuit that connects a branching portion at which a downstream portion of a second heat exchanger branches and a connecting portion farther downstream in a direction of fluid flow than the branching portion, and a second branch circuit that connects a branching portion at which a portion farther downstream than the connecting portion of the first branch circuit branches and a connecting portion farther downstream in the direction of fluid flow than the branching portion of the second branch circuit. The first branch circuit is provided with a third heat exchanger that exchanges heat between fluid flowing through the fluid circuit and outdoor air, and the second branch circuit is provided with a heat storage tank that stores fluid having exchanged heat with outdoor air in the third heat exchanger.

An air-conditioning apparatus includes a refrigerant circuit and a fluid circuit. The fluid circuit includes a first branch circuit that connects a branching portion at which a downstream portion of a second heat exchanger branches and a connecting portion farther downstream in a direction of fluid flow than the branching portion, and a second branch circuit that connects a branching portion at which a portion farther downstream than the connecting portion of the first branch circuit branches and a connecting portion farther downstream in the direction of fluid flow than the branching portion of the second branch circuit. The first branch circuit is provided with a third heat exchanger that exchanges heat between fluid flowing through the fluid circuit and outdoor air, and the second branch circuit is provided with a heat storage tank that stores fluid having exchanged heat with outdoor air in the third heat exchanger.

A data center includes heat producing components and an air handling system that provides reduced relative humidity air to cool the heat producing components. The air handling system includes a thermal storage unit that removes thermal energy from incoming air under a given set of ambient air conditions and releases thermal energy into incoming air under another set of ambient air conditions. Under the given set of ambient air conditions, the thermal storage unit cools the incoming air and causes water vapor to condense out of the incoming air. Under the other set of ambient air conditions, the thermal storage unit releases thermal energy into the incoming air, thus heating the incoming air.

Various implementations described herein are directed to a heat pump system for cooling and/or heating a room via radiation. The heat pump system may include an outdoor unit, an indoor unit, and at least one pipe comprising a refrigerant. The pipe may provide fluid communications between the indoor unit and the outdoor unit. The indoor unit may comprise a radiating storage configured to absorb heat from the refrigerant and radiate the absorbed heat.

Various implementations described herein are directed to a heat pump system for cooling and/or heating a room via radiation. The heat pump system may include an outdoor unit, an indoor unit, and at least one pipe comprising a refrigerant. The pipe may provide fluid communications between the indoor unit and the outdoor unit. The indoor unit may comprise a radiating storage configured to absorb heat from the refrigerant and radiate the absorbed heat.

In some aspects, the present disclosure relates to switchable phase change material system (SPCMS). In some embodiments, dynamic, switchable phase change material systems allow building envelope assemblies to store energy from one side and release to the other side in order to reduce thermal loads and peak demands for both space heating and cooling. PCM layers can be coupled with thermal insulation layers to ensure heat does not transfer readily through the building envelope and thus increase thermal heating and cooling loads for the building. In some embodiments of the present disclosure, a combination of rotatable members comprised of PCM and insulation are switchable in position such that layers with PCM are switched from one side to the other without the need to maintain the thermal insulation within a building envelope.