An indoor/outdoor cooling cabinet includes an internal cavity that may be maintained at a desired temperature by a cooling system that is powered by a DC power system having at least one onboard battery for facilitating use of the cabinet outdoors where an external power supply is not readily available. The cooling cabinet also includes an AC power system that is connectable to an external AC power source for replenishing the power stored in the at least one battery of the DC power system, which facilitates the use of the cabinet indoors.

An energy gateway, a household electrical appliance, a direct current microgrid system and an energy management method therefor are provided. The energy gateway includes: a direct current input terminal connected to a direct current output terminal of an external solar power generation apparatus. The energy gateway further includes a first direct current output terminal and/or a second direct current output terminal configured to supply power to an external direct current electrical appliance, where the first direct current output terminal is directly connected to the direct current input terminal, and the second direct current output terminal is connected to the direct current input terminal via a direct current voltage transformation apparatus.

A helmet attachment is provided, comprising: a shell having a concave bottom; a base having: a convex top affixed to the concave bottom of the shell; a concave bottom affixable to the convex top of a helmet; and an air flow channel formed in the convex top of the base for guiding air through to an exit in the concave bottom of the base; a power and electronics module secured within a cavity in the shell, comprising: a power source; and a 5 volt power output connector electrically coupled to the power source and configured for charging a small electronic device; and a heater electrically coupled to the power source.

A helmet is provided, comprising: a first shell having a convex top; a second shell having a concave bottom; a base having: a convex top affixed to the concave bottom of the shell; a concave bottom secured to the convex top of; and an air flow channel formed in the convex top of the base for guiding air through to an exit in the concave bottom of the base; a power and electronics module secured within a cavity in the first shell, comprising: a power source, comprising: a solar array secured; a battery pack; and a charging module configured to charge the battery pack from current provided by the solar array; and a 5 volt power output connector electrically coupled to the power source and configured for charging a small electronic device; and a heater electrically coupled to the power source.

The present disclosure provides a solar energy system that comprises a solar collector for providing energy generated from incident solar radiation. The solar energy system also comprises a first heat exchange system that has an ejector that is arranged to operate using at least a portion of the energy provided by the solar energy collector. Further, the solar energy system comprises a second heat exchange system arranged to operate using energy from an energy source other than a solar energy source. The solar energy system is arranged for transfer of thermal energy between the first heat exchange system and a region, and between the second heat exchange system and the region. The solar energy system is arranged to control a relative contribution of the first and second heat exchange systems to the transfer of the thermal energy.

A fluid-based system for use in heating and/or cooling. In particular, the system may have a fluid heating device, which may be a solar fluid heating device, configured to heat a fluid. Heat from the heated fluid may be transferred to one or more cooling subsystems or heating subsystems. A cooling subsystem may be an absorption cooling subsystem, for example, wherein heat may cause phase change of a refrigerant. A heating subsystem may include a storage tank through which heated fluid may be circulated to heat the storage tank. A system of the present disclosure may include multiple cooling and/or heating subsystems for cooling and or heating a variety of different environments, objects, or materials.

A fluid-based system for use in heating and/or cooling. In particular, the system may have a fluid heating device, which may be a solar fluid heating device, configured to heat a fluid. Heat from the heated fluid may be transferred to one or more cooling subsystems or heating subsystems. A cooling subsystem may be an absorption cooling subsystem, for example, wherein heat may cause phase change of a refrigerant. A heating subsystem may include a storage tank through which heated fluid may be circulated to heat the storage tank. A system of the present disclosure may include multiple cooling and/or heating subsystems for cooling and or heating a variety of different environments, objects, or materials.

An induced groundwater flow closed loop geothermal system provides safety associated with closed loop geothermal systems (e.g., no mixing of surface water, closed system fluid, and groundwater) and efficiency associated with open loop geothermal systems (e.g., increased heat transfer provided by groundwater flow). A heat exchanger connected to an external system is located in a hole in a geological formation. The hole has a depth below where groundwater is located. A fluid from the external system is routed through the heat exchanger. A pump is utilized to induce groundwater flow from the geological formation, across the heat exchanger and back to the geological formation to enable thermal transfer between the fluid and the groundwater and the groundwater and the geological formation. A casing may be located in the hole to provide structural support and grouting materials may be used to fill space around the casing enabling a groundwater flow path.

The invention relates to a device for heating and/or cooling a chamber (9). The device comprises at least one frame (4), at least one first light passage device (1) and at least one second light passage device (2). The fast light passage device (1) and the second light passage device (2) are arranged on the frame (4). Furthermore, at least one first intermediate chamber (3) is formed between the first light passage device (1) and the second light passage device (2). At least one thermally conductive medium is arranged in the first intermediate chamber (3). At least one heating and/or cooling element (5) is arranged on the frame (4) such that it is in contact with the thermally conductive medium arranged in the intermediate chamber (3), the device having at least one current supply unit (8) which is powered by solar energy and which is connected to the heating and/or cooling element (5).

A portable refrigeration unit includes a substantially rectangular box for providing storage for perishable goods. A refrigerator is used for cooling the rectangular box to a predetermined temperature. An insertable backpack engages within an open end of the substantially rectangular box for providing a supporting surface for components of the refrigeration unit. The portable refrigeration unit further includes a water generator for generating potable water from atmospheric moisture that can be heated using refrigeration components.