A variable speed drive (VSD) can be used to vary the voltage-to-frequency ratio (V/f) supplied to a compressor motor of a heating, ventilation, air conditioning or refrigeration (HVAC&R) system to make the motor stronger or weaker to compensate for varying conditions in the HVAC&R system. The VSD and corresponding control system or algorithm can monitor an operating parameter of the HVAC&R system, such as the kW absorbed by the motor, and then raise or lower the V/f of the VSD to obtain the lowest possible power consumption from the motor.

Exemplary embodiments provide a refrigeration system having an interior space cooled by a plurality of cooling. Each cooling unit is capable of operating either synchronously when in communication with a control panel or under independent operation. Each cooling unit is modularly and replaceable without the use of tools by means of a quick connect system. The cooling units use a heat exchanger cooled by chilled water and make use of an electronic super heat control and electronic expansion valve to regulate the flow of refrigerant for improved efficiency.

Systems and apparatus for providing long-term cold storage of solid materials such as dry ice are disclosed. The solid materials are stored in a tank configured to maintain the materials in their solid state. The tank is designed with a port sufficiently large to facilitate ingress and egress of the solid materials. A cryogenic liquid is used within the tank to substantially prevent the solid materials from sticking to each other, and to maintain the solid materials at a low temperature.

Exemplary embodiments provide a refrigeration system having an interior space cooled by a plurality of cooling. Each cooling unit is capable of operating either synchronously when in communication with a control panel or under independent operation. Each cooling unit is modularly and replaceable without the use of tools by means of a quick connect system. The cooling units use a heat exchanger cooled by chilled water and make use of an electronic super heat control and electronic expansion valve to regulate the flow of refrigerant for improved efficiency.

Systems and methods for identifying, tracking usage of, and replenishing products on a shelf of a product storage unit include a pressure sensor array positioned on the shelf and configured to detect forces exerted on the pressure sensor array by each of the products located on the shelf. An electronic database stores reference pressure array data representative of a reference pressure data model relative to each of the products. A computing device obtains a pressure data set associated with a product that was captured by the pressure sensor array when the product was positioned on the pressure sensor array, and correlates the pressure data set associated with the product with the reference pressure array data stored in the electronic database to determine an identity of the product and a consumption level of the product, automatically replenishing the product when consumption of the product is above a set threshold.

Systems and methods for identifying, tracking usage of, and replenishing products on a shelf of a product storage unit include a pressure sensor array positioned on the shelf and configured to detect forces exerted on the pressure sensor array by each of the products located on the shelf. An electronic database stores reference pressure array data representative of a reference pressure data model relative to each of the products. A computing device obtains a pressure data set associated with a product that was captured by the pressure sensor array when the product was positioned on the pressure sensor array, and correlates the pressure data set associated with the product with the reference pressure array data stored in the electronic database to determine an identity of the product and a consumption level of the product, automatically replenishing the product when consumption of the product is above a set threshold.

A heat receiver is configured to cool down a liquid crystal panel in a rectangular shape used for a liquid crystal projector that causes light to be transmitted through the liquid crystal panel and thereby displays a projected image. The heat receiver includes a window portion in a rectangular shape formed to come into contact with an outer periphery of the liquid crystal panel; a flat annular flow path formed on an outer circumferential side of the window portion to surround the window portion and configured to have a narrowed portion in a region along one side of the window portion; and two supply discharge flow paths formed in a neighborhood of two corners of the window portion arranged across the narrowed portion to supply and discharge a heat exchange medium.

A cooling device includes a cooling tank, a liquid storage tank, and a connector. The cooling tank stores refrigerant liquid for immersing and cooling a heating element. The liquid storage tank stores the refrigerant liquid outside the cooling tank and has an atmosphere opening portion. The connector connects the two tanks and allows the refrigerant liquid to pass through the connector. One end of the connector has a cooling-tank opening portion located in a gravity direction at a position lower than or same as a liquid level of the refrigerant liquid. An upper portion of the cooling tank stores a gas generated in the cooling tank. The refrigerant liquid flows between the two tanks via the connector in accordance with a change in volume of the gas. The liquid storage tank is provided upward of the cooling tank. The two tanks are connected only by the connector.

Portage storage containers including controlled evaporative cooling systems are described herein. In some embodiments, a portable container including an integral controlled evaporative cooling system includes: a storage region, an evaporative region adjacent to the storage region, a desiccant region adjacent to the outside of the container, and an insulation region positioned between the evaporative region and the desiccant region. A vapor conduit with an attached vapor control unit has a first end within the evaporative region and a second end within the desiccant region. In some embodiments, the controlled evaporative cooling systems are positioned in a radial configuration within the portable container.

Portage storage containers including controlled evaporative cooling systems are described herein. In some embodiments, a portable container including an integral controlled evaporative cooling system includes: a storage region, an evaporative region adjacent to the storage region, a desiccant region adjacent to the outside of the container, and an insulation region positioned between the evaporative region and the desiccant region. A vapor conduit with an attached vapor control unit has a first end within the evaporative region and a second end within the desiccant region. In some embodiments, the controlled evaporative cooling systems are positioned in a radial configuration within the portable container.