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.

A solar energy-storage cooler includes an insulated housing and a lid movable between a closed position, sealing the opening, and an open position for access to an interior of the housing. A solar power source generates electrical energy for an energy storage component in the housing which is part of an energy storage device. The housing can include a separate secure compartment. A compartment door can close the secure compartment door for locking by a lock mechanism to limit unauthorized access to the secure compartment. The lid and compartment door can share a common hinge. A motion sensor can characterize motion of the housing. An estimate of time can be determined as predictive of a state of charge of the energy storage device. Temperature indications are provided responsive to a temperature sensor.

A thermal management system, the thermal management system including a refrigerant system, a first heat exchange system and a second heat exchange system. In a circulation mode of the thermal management system, the cooling liquid in the first heat exchange system and the second heat exchange system can be exchanged.

Provided is an hybrid solar heat absorption cooling system comprising: an absorption refrigerator; a solar heat steam generator configured to generate steam using solar heat; a daytime steam supplying unit configured to supply steam generated by the solar heat steam generator during the day as a heat source for the absorption refrigerator; a daytime hot water storage tank configured to store hot water discharged from the absorption refrigerator during the day; a nighttime hot water supplying unit configured to supply hot water stored in the daytime hot water storage tank during the night as a heat source for the absorption refrigerator; a nighttime hot water storage tank configured to store hot water discharged from the absorption refrigerator during the night; and a daytime hot water supplying unit configured to supply hot water stored in the nighttime hot water storage tank during the day to the solar heat steam generator.

A solar-thermal refrigerant compression system employing refrigerants, such as R410a and R500, and a method of employing the system in refrigeration and air-conditioning units. The system includes a refrigerant storage tank, an evaporator, a mixing chamber, a condenser and an isochoric thermal compressor comprising a condensate heat exchanger and a heating coil connected to a solar collector field.

The systems of the present disclosure include a solar-powered steam Rankine cycle (SRC) subsystem to convert solar energy into thermal energy and store the thermal energy; an ejector refrigeration cycle (ERC) subsystem to provide a first refrigeration effect with a first range of temperature based on the thermal energy; an absorption refrigeration cycle (ARC) subsystem to provide a second refrigeration effect with a second range of temperature based on the thermal energy; a brine refrigeration cycle (BRC) subsystem to generate and store when there is no cooling demand and provide a third refrigeration effect with a third range of temperature based on the electrical power generated by the ERC subsystem and the ice being melted; and an adsorption refrigeration cycle (ADRC) subsystem to provide a fourth refrigeration effect with a fourth range of temperature based on the thermal energy.

The invention relates to a cooling device 1, in particular a freezer 2, having a closable cooling space 3, an electrically operated cooling circuit, and preferably a cold accumulator 4, wherein the at least one closable cooling space 3 and the cold accumulator 4 can be cooled by the electrically operated cooling circuit. The invention is characterized in that the cooling device has a current distributor 5 for distributing electric power of at least one regenerative current source 6 to an electrically operated cooling circuit of the cooling device 1 and to at least one further electric consumer 7. Moreover, the current distributor 5 has an automatic control with an arithmetic unit 23, a memory 24 as well as a priority logic. The priority logic in case of lacking electric power of the at least one regenerative current source 6 first of all shall supply the electrically operated cooling circuit of the cooling device 1 with current.

A cold-shed may be deployed in areas with little or no electrical infrastructure in order to provide a cold storage area for perishable goods including agricultural, dairy products, medicines, vaccines, etc. A wireless communication device may be installed in the cold-shed to allow remote management, access control, and monitoring of the cold-shed devices, including cooling units, solar power cells, batteries, power conditioners, and a variety of sensors to determine internal and external temperatures, door positions, and other information. A mobile device configured to communicate with the wireless communication device may receive information and updates via cellular networks or text messaging. The mobile device may also be used to change temperature settings, lock and unlock doors, conduct inventory management and auditing, and make other changes. The corresponding application allows an owner to manage and monitor many cold-sheds from a single mobile device.

A solar cooling system including a support structure, a plurality of photovoltaic modules affixed to the support structure to receive sunlight and provide solar electricity, a plurality of thermoelectric generator modules affixed to support structure to receive temperature gradient and provide thermal electricity, a plurality of thermoelectric cooling modules affixed to the support structure to receive input electricity and provide cooling, and a battery assembly affixed to the support structure and electrically connected to the plurality of photovoltaic modules and the plurality of thermoelectric generator modules to receive, regulate, and store the solar electricity and the thermal electricity and provide the input electricity.

A portable refrigeration system for use in transport of medicines or other valuable, temperature sensitive materials is disclosed. The system can use GPS positioning technology to provide absolute global location along with internet connection through a cellular modem on board which allows for communication to the cloud of temperature and transit data during device use. The refrigerator can be powered by a rechargeable battery back that may be recharged through connection to AC mains supply or connection to the photovoltaic panel included with the device. The insulated container can be held at a constant temperature through the use of vacuum insulated panel construction. The device can be cooled through the use of thermoelectric cooling modules coupled to the insulated chamber and paired with a heat exchanger with heat pipes and a system fan. The device can be operated either through the included graphical user interface display via touch or buttons or it may be accessed and controlled by a remote computer through the cloud via a cellular connection.