A blast cell system is provided with simple and scalable designs that prevent short cycling of air flow through any pallets in blast cells. The blast cell includes a plurality of suction channels that provide independent fluid pathways for directing the air drawn from different rows in the blast cell into the fan.

An air-conditioning apparatus that can prevent freezing of a heat transfer medium even when using a non-azeotropic refrigerant mixture. The air-conditioning apparatus is designed such that when a heat exchanger serves as a cooler that cools a heat transfer medium, it controls a heat medium passage reversing device. This is so that, when a heat transfer medium flowing through a heat medium flow passage will not be frozen, a refrigerant flowing through a refrigerant flow passage and the heat transfer medium flowing through the heat medium flow passage are in counter flow. It is also to control the heat medium passage reversing device so that, when there is a possibility of freezing the heat transfer medium flowing through the heat medium flow passage, the refrigerant flowing through the refrigerant flow passage and the heat transfer medium flowing through the heat medium flow passage are in parallel flow.

A temperature controlled storage apparatus 8(10), comprising; a plurality of lockable storage spaces, each of the plurality of lockable storage spaces comprising one or more compartments; in which the temperature of each of the one or more compartments is independently controllable to provide either one of: chilled temperature; or frozen temperature; and wherein access to the storage space is remotely programmable.

Generally, a variable fan speed control in an HVAC system is described. Such methods and systems to control fan speed can in turn improve efficiency of the HVAC system by minimizing power consumption, for example of the compressor. The control scheme is based on various operating conditions of compressor load and ambient air temperature, which are used to determine an optimum fan speed.

A controller for controlling a refrigeration unit, a method, and a refrigeration system are disclosed. In an illustrative embodiment, a controller stores instructions for a first refrigeration setting and a second refrigeration setting, tracks a cumulative average temperature in a refrigeration element, and activates either the first refrigeration setting or the second refrigeration setting. The first refrigeration setting has a lower average power consumption and a higher range of temperature variation than the second refrigeration setting. The controller activates the first refrigeration setting until the cumulative average temperature goes outside a selected temperature range; then the controller activates the second refrigeration setting until the cumulative average temperature is within a target temperature range that has a lower threshold that is greater than the lower threshold of the selected temperature range and an upper threshold that is less than the upper threshold of the selected temperature range.

A space-saving, high-density modular data pod and a method of cooling a plurality of computer racks are disclosed. The modular data pod includes an enclosure including wall members contiguously joined to one another along at least one edge of each wall member in the shape of a polygon and a data pod covering member. Computer racks arranged within the enclosure form a first volume between the inner surface of the wall members and first sides of the computer racks. A second volume is formed of second sides of the computer racks. A computer rack covering member encloses the second volume and the data pod covering member form a third volume coupling the first volume to the second volume. An air circulator continuously circulates air through the first, second, and third volumes. The method includes circulating air between the first and second volumes via the third volume and the computer racks.

A space-saving, high-density modular data pod and a method of cooling a plurality of computer racks are disclosed. The modular data pod includes an enclosure including wall members contiguously joined to one another along at least one edge of each wall member in the shape of a polygon and a data pod covering member. Computer racks arranged within the enclosure form a first volume between the inner surface of the wall members and first sides of the computer racks. A second volume is formed of second sides of the computer racks. A computer rack covering member encloses the second volume and the data pod covering member form a third volume coupling the first volume to the second volume. An air circulator continuously circulates air through the first, second, and third volumes. The method includes circulating air between the first and second volumes via the third volume and the computer racks.

An apparatus comprises a chamber and two pumps coupled to opposing sides of the chamber. The chamber is configured to receive a medium and includes a first cryogenically cooled structure having a first surface and an opposing second surface and a second cryogenically cooled structure having a first surface and an opposing second surface. The first surface of the first cryogenically cooled structure faces the first surface of the second cryogenically cooled structure forming a gap. The gap is configured to receive the medium. The chamber also includes a gas inlet.

An apparatus comprises a chamber and two pumps coupled to opposing sides of the chamber. The chamber is configured to receive a medium and includes a first cryogenically cooled structure having a first surface and an opposing second surface and a second cryogenically cooled structure having a first surface and an opposing second surface. The first surface of the first cryogenically cooled structure faces the first surface of the second cryogenically cooled structure forming a gap. The gap is configured to receive the medium. The chamber also includes a gas inlet.

A blast cell system is provided with simple and scalable designs that prevent short cycling of air flow through any pallets in blast cells. The blast cell includes a plurality of suction channels that provide independent fluid pathways for directing the air drawn from different rows in the blast cell into the fan.