Abstract: A diagnostic system for a refrigeration system including a condenser is provided. The diagnostic system may include a controller determining a subcooling temperature of the refrigeration system, an approach temperature of the condenser, and a condenser temperature difference of the condenser. The controller may determine at least one of a fault condition of the refrigeration system and a charge of the refrigeration system based on the subcooling temperature, the approach temperature, and the condenser temperature difference.

Abstract: A system comprising a cryogenic engine system and a refrigeration system, wherein the cryogenic engine system and the refrigeration system are mechanically and/or thermally coupled with each other. The refrigeration system is driven by the cryogenic engine system and the cryogenic engine system enhances cooling of the refrigeration system.

Abstract: A cryostat includes a coolant tank, a refrigerator, a cylindrical member, and a gas phase volume-varying unit. The coolant tank houses a liquid coolant. The refrigerator is provided above the coolant tank and recondenses the coolant evaporated in the coolant tank. The cylindrical member houses a lower part of the refrigerator and forms a recondensing chamber that communicates with the coolant tank. The gas phase volume-varying unit communicates with a gas-phase space above a liquid surface of the liquid coolant in the coolant tank and varies a gas phase volume in the gas-phase space to cancel out a pressure fluctuation in the coolant tank.

Abstract: An island merchandiser including a first merchandiser module, a second merchandiser module, and a single, unitary base. The first merchandiser module includes a first case defining a first product display area that is maintained within a predetermined temperature range below approximately 41 degrees Fahrenheit. The second merchandiser module is positioned next to the first merchandiser module, and includes a second case defining a second product display area The second merchandiser module is positioned so that a rear wall of the second case is in communication with a rear wall of the first case so that the first and second merchandiser modules are positioned in a back-to-back relationship. The unitary base is positioned to at least partially support each of the first and second merchandiser modules relative to a support surface. The module defined by the second merchandiser module is different from the module defined by the first merchandiser module.

Abstract: A method is provided for accelerating the drying of a cargo box (18) of a refrigerated truck (12), trailer (16), or container following a wash out. In an aspect, the method includes circulating air from the cargo box (18) through an evaporator (30) of the refrigerant unit (20) and back to the cargo box (18); and operating the refrigerant unit (20) in alternating cycles of first heating the circulating air and then cooling the circulating air.

Abstract: A method and system to transfer heat using a cooling medium includes a first cold plate, including a first fluid flow path in thermal communication with a first thermal region of the first cold plate, and a second fluid flow path in fluid communication with the first fluid flow path and in thermal communication with a second thermal region of the first cold plate, and a thermoelectric heat exchanger in thermal communication with the first thermal region of the first cold plate.

Abstract: Disclosed herein is a method for producing heating in a high temperature heat pump having a heat exchanger. The method comprises extracting heat from a working fluid, thereby producing a cooled working fluid wherein said working fluid comprises at least one alkyl perfluoroalkene ether. Also disclosed is a method of raising the maximum feasible condenser operating temperature in a high temperature heat pump apparatus. The method comprises charging the high temperature heat pump with a working fluid comprising at least one alkyl perfluoroalkene ether. Also disclosed is a high temperature heat pump apparatus. The apparatus contains a working fluid comprising at least one alkyl perfluoroalkene ether. Also disclosed is a composition comprising at least one alkyl perfluoroalkene ether, and specialized additives or lubricants for use in a high temperature heat pump.

Abstract: A peltier device comprises peltier elements specified in cooling or heating temperature, a heating heat sink connected in contact on one side surface of the peltier element, a chilling heat sink connected in contact on the other side surface of the peltier element, and a cooling fan. Using peltier elements each of which is specified in a cooling or a heating activity, a heat exchange efficiency is enhanced thank to a plurality of functions of a single peltier element; thermal radiation is separated by bringing the peltier element into contact with a heating heat sink and a cooling heat sink independently from each other; the surface area in contact with the fluid is maximized through the “X” shaped aperture formed with four wings protruding from the inner surface of the aperture towards the center part, directly transferring the endothermic and exothermic effects from the Peltier element to the fluid.

Abstract: The present invention relates to an apparatus including: firstly, —a cold production unit (U), having a line for the flow of a coolant (BC); —means for compressing (1), decompressing (4), and evaporating (5) said coolant; and —an air condenser (2) and a main water condenser (CEP). Said facility also includes an auxiliary water flow device that has a first water reception vessel and a second water reception vessel (20, 30). Said auxiliary device defines at least one so-called “water heating” or “water-based calorie removal” path, leading from the first vessel to the second vessel and including at least one main section (65) for removing calories via water and capable of engaging with a main section (7) for exchanging heat with the coolant in the main water condenser (CEP). Said auxiliary device also defines a second so-called “water cooling” path, leading from the second vessel to the first vessel and including at least one water cooling section (82, 92) in a heat exchanger (ECA, EVS).

Abstract: The heat exchanger is adapted for cooling a coolant (e.g., water), used to cool a device or an area (e.g., building interior), such as during periods of peak energy cost and usage, to save energy and energy costs. The heat exchanger includes a coolant storage tank with one or more refrigerant circulators in contact with the floor of the tank. The circulators use a refrigerant having a freezing temperature colder than the coolant, with coolant on the floor of the tank forming a layer of ice thereon. A rotary scraper extends up through the tank floor from each circulator, with the scrapers operating to remove the thin layer of ice from the floor as the ice forms. The resulting ice chips are relatively small and thin, thus having a relatively large surface area for their volume in order to maximize melting and rapid cooling of the coolant.

Abstract: A cryogenic cooling apparatus comprises a supply gas line and a return gas line adapted to be coupled to a compressor. A coupling element is positioned in gaseous communication with the supply and return gas lines, the coupling element being adapted in use to supply gas to a mechanical refrigerator so that the pressure of said supplied gas is modulated by the coupling element in a cyclical manner. A sensing system is used to monitor the operational state of the mechanical refrigerator and a control system modulates the frequency of the cyclical gas pressure supplied by the coupling element in accordance with the monitored operational state. The mechanical refrigerator has a first cooled stage and a second cooled stage, the second cooled stage being adapted to be coupled thermally with target apparatus to be cooled.

Abstract: A refrigerator has a flow path structure formed by a heat-exchanger. The refrigerator includes storage compartments, and a cool air supplying unit provided at a rear of the storage compartments to supply cool air at the storage compartments, and the cool air supplying unit includes a heat-exchanger to divide a flow path at which cool air is provided to flow along the cool air supplying unit.

Abstract: Method for improving efficiency of a chilled water system having a chiller unit, circulation pumps, a heat absorption unit and a heat rejection unit, including adjusting a temperature of at least one of a chilled water supply to the heat absorption unit and a condenser water supply from the heat rejection unit; measuring efficiency of the chiller unit and at least one of the circulation pumps, the heat absorption unit and the heat rejection unit; further adjusting temperature of at least one of the chilled water supply to the heat absorption unit and the condenser water supply from the heat rejection unit if the measuring the efficiency indicates an improved efficiency; and further adjusting the temperature of the at least one of the chilled water supply to the heat absorption unit and the condenser water supply from the heat rejection unit if measuring the efficiency indicates worsened efficiency.

Abstract: In some embodiments, apparatuses and methods are provided herein useful to delivering and maintaining perishable items within a certain temperature range during delivery.

Abstract: A valve for use in an air exchange panel (20) of a transportation refrigeration system is provided including a valve cap (102) configured and arranged to be positioned adjacent the air exchange panel (20) and movable between a first position and a second position. The valve cap (102) includes a magnetic portion. A resilient flexible member (110) is coupled to the valve cap (102) and is configured and arranged to be coupled to the air exchange panel (20). The resilient flexible member (110) biases the valve cap (102) into a first position. An electromagnet (150) is positioned inside the air exchange panel (20), opposite the valve cap (102). A controller is coupled to the electromagnet (150) to selectively apply power to move the valve cap (102) between the first position and the second position.

Abstract: A refrigerator includes a compressor, an input current detector to detect input current of alternating current (AC) power inputted to the refrigerator, a converter to convert the inputted AC power into direct current (DC) power, a capacitor to store the converted DC power, an inverter to output AC power using the converted DC power for driving of the compressor, a DC terminal voltage detector to detect voltage at two terminals of the capacitor, and a compressor microcomputer to control the inverter and to calculate refrigerator power consumption based on the detected input current and the detected DC terminal voltage. The refrigerator enables simplified power consumption calculation.

Abstract: An ice maker apparatus is provided that may include a casing, an extruder die, an auger, a heat exchange body, and a fin portion. The casing may define a chamber about a central axis and extend along the central axis between a top portion and a bottom portion. The extruder die may be mounted to the casing at the top portion of the casing. The auger may be disposed within the chamber. The heat exchange body may be disposed in thermal engagement with the chamber. The heat exchange body may include a base wall extending along a portion of the casing and a sidewall extending outward from the base wall. The heat exchange body may also define an air duct across the base wall and sidewall. The fin portion may include a fin extending outward from the base wall. The fin may define a plurality of subchannels.

Abstract: A heat medium discharge side of a first pump and a heat medium discharge side of a second pump are connected to a first switching valve in parallel. Heat medium inlet sides of the respective target devices for heat exchange included in a first target device group for heat exchange are connected to a first switching valve in parallel. The heat medium inlet side of the first pump and the heat medium inlet side of the second pump are connected to a second switching valve in parallel. The heat medium outlet sides of the respective target devices for heat exchange included in the first target device group for heat exchange are connected to the second switching valve in parallel. Furthermore, switching is performed between a state of circulation of the heat medium between the first pump and the target device, and a state of circulation of the heat medium between the second pump and the target device.

Abstract: In one instance, a heating, ventilating, and air conditioning (HVAC) system includes a four-way reheat valve and is configured to accesses pressures within a conduit network to facilitate control of the reheat valve. The four-way reheat valve includes a piston valve slide within a main valve chamber and a pilot valve fluidly coupled to the main valve chamber and a compressor-suction conduit fluidly coupled to the four-way valve and to a compressor. The system also includes a flow-restricting device disposed on the conduit downstream of the four-way valve and a pilot conduit coupled to the conduit downstream of the flow-restricting device and coupled to the pilot valve for assisting with movement of the piston valve slide.

Abstract: In a Stirling refrigerator, a regenerator has a low-temperature end and a high-temperature end. A plurality of protrusions, which thermally contact with the low-temperature end of the regenerator, are formed on a low-temperature heat exchanger. The low-temperature heat exchanger has a recess between the protrusions, and the recess forms a flowing groove through which a working gas flows. The regenerator may contain a mesh regenerator material.