Various embodiments may relate to a radiant cooler. The radiant cooler may include a chamber. The radiant cooler may also include a vacuum pump connected to the chamber. The radiant cooler may further include an infrared absorber arranged within the chamber. A wall of the chamber may be configured to allow at least a portion of infrared light to pass through. The vacuum pump may be configured to generate a vacuum in the chamber. The infrared absorber may include a fluid, i.e. a liquid, configured to evaporate into the vacuum upon receiving thermal energy from at least the portion of infrared light.

A electrochemical direct heat to electricity converter having a low temperature membrane electrode assembly array and a high temperature membrane electrode assembly array is provided. Additional cells are provided in the low temperature membrane electrode assembly array, which causes an additional amount of the working fluid, namely hydrogen, to be pumped to the high pressure side of the converter. The additional pumped hydrogen compensates for the molecular hydrogen diffusion that occurs through the membranes of the membrane electrode assembly arrays. The MEA cells may be actuated independently by a controller to compensate for hydrogen diffusion

A electrochemical direct heat to electricity converter having a low temperature membrane electrode assembly array and a high temperature membrane electrode assembly array is provided. Additional cells are provided in the low temperature membrane electrode assembly array, which causes an additional amount of the working fluid, namely hydrogen, to be pumped to the high pressure side of the converter. The additional pumped hydrogen compensates for the molecular hydrogen diffusion that occurs through the membranes of the membrane electrode assembly arrays. The MEA cells may be actuated independently by a controller to compensate for hydrogen diffusion

The present disclosure provides materials and methods related to passive cooling systems. In particular, the present disclosure provides a condensorator heat exchanger with a single microchannel coil that integrates the evaporator and condenser into one assembly. The passive heat exchanger systems of the present disclosure provide enhanced cooling capacity and airflow in environments ranging from outdoor electronic enclosures to commercial and residential buildings.

The present invention relates to a centrifuge, in particular a laboratory centrifuge, comprising a rotor which is rotatably mounted in an interior of a rotor chamber and is designed to accommodate sample vessels, a drive motor to set the rotor in rotation, and a cooling device which is designed to dissipate heat from the interior of the rotor chamber via a coolant, the cooling device being designed to use an elastocaloric effect and having at least one cooling unit which comprises an elastocaloric material arranged between a counter block and a punch, the punch being designed to periodically apply a force to the elastocaloric material and then to let the elastocaloric material relax again, the cooling device being designed to transfer both heat from the elastocaloric material to the coolant and from the coolant to the elastocaloric material. The present invention also relates to a method for cooling an interior of a rotor chamber of such a centrifuge.

The present invention relates to a centrifuge, in particular a laboratory centrifuge, comprising a rotor which is rotatably mounted in an interior of a rotor chamber and is designed to accommodate sample vessels, a drive motor to set the rotor in rotation, and a cooling device which is designed to dissipate heat from the interior of the rotor chamber via a coolant, the cooling device being designed to use an elastocaloric effect and having at least one cooling unit which comprises an elastocaloric material arranged between a counter block and a punch, the punch being designed to periodically apply a force to the elastocaloric material and then to let the elastocaloric material relax again, the cooling device being designed to transfer both heat from the elastocaloric material to the coolant and from the coolant to the elastocaloric material. The present invention also relates to a method for cooling an interior of a rotor chamber of such a centrifuge.

A system and method of controlling temperature of a medium by refrigerant vaporization, or working gas condensation, or a combination of both, the system including a container, at least one a working gas reservoir having at least one reservoir section that includes a wall with an exterior surface structured to be thermally coupled with a volume of the medium in the container and to provide a volume of medium thermal coverage in the container, a condensation apparatus to provide regulation of working gas condensation in the reservoir, whereby the working gas reservoir forms a vapor space in each of the at least one reservoir section in response to receiving the working gas and to the condensation apparatus regulation of condensation to enable working gas condensation at or near a selected temperature of the volume of medium in the container that is thermally coupled to the respective reservoir section.

The present disclosure relates to a colored radiative cooling device that includes a selective heat transfer layer between a spectral selective filter and a thermal emitter, and a method of cooling an object by using the colored radiative cooling device.

A method for cooling an information technology system, comprising: receiving a flow of at least a subcooled liquid phase change refrigerant; cooling the information technology system by sensible heat transfer in an evaporator, to produce at least gaseous refrigerant; and exchanging heat from the at least gaseous refrigerant from the evaporator to the subcooled liquid phase change refrigerant. The phase change refrigerant may be a hydrofluorocarbon ether having a boiling point of 30-65° C. at 1-12 bar.

Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.