Abstract: Disclosed are an in-line direct cryogenic method and system for cooling heated fluid food products, such as sauces. The method includes injecting cryogen directly into the fluid to be cooled while the flow rate of the fluid to be cooled is adjusted in response to downstream temperature measurements and while maintaining the injection rate of the cryogen into the fluid. According to the method the flow of the sauce is adjusted during the flow of the cryogen to achieve process stability, product uniformity and efficient use of the cryogen.

Abstract: An HVAC system includes, an electronic expansion valve (EEV), and a controller in communication with the EEV. The controller determines a minimum EEV setpoint position value based on a comparison of a superheat error value to a setpoint error threshold. The controller determines a maximum EEV setpoint position value based on a comparison of a second superheat error value to a second setpoint error threshold. The controller calculates an average setpoint value based on the maximum EEV setpoint position value and the minimum EEV setpoint position value. The controller configures the EEV to a position corresponding to the average setpoint value and operate the EEV for a predetermined amount of time. The controller operates the EEV according to a PID algorithm.

Abstract: A rooftop air conditioning unit to provide conditioned air to a conditioned space within a building is provided and includes a housing, disposed on a roof of the building roof, defining a pathway from an inlet fed by exterior and/or interior air to an outlet leading to the conditioned space and a hydronic heating system disposed within the housing to heat the air traveling along the pathway.

Abstract: A downhole tool (100) including an open loop cooling system (110) having a pressurized container (120) disposed within a tool string, and has a refrigerant (122). The cooling system further includes a tank (150) in fluid communication with the pressurized container (120), and a heat exchanger (160) associated with tank (150), where the heat exchanger exchanges heat between the refrigerant (122) and a downhole payload (164). The cooling system further includes a low pressure apparatus that creates a low pressure region proximate the pressurized container. The low pressure apparatus can include a venturi (180). The venturi has a drilling mud passage (188) therethrough, and drilling mud flowing through a convergence (186) creates a low pressure adjacent the tank (150).

Abstract: A method for recovering and using energy from a fluid exiting an outlet of a compressor in an air conditioning system, the method including: disposing an ejector between a compressor and a condenser of an air conditioning system, the ejector including a first inlet for receiving a working fluid and a second inlet for receiving an ejection fluid; connecting the first inlet of the ejector to an outlet of the compressor; connecting an outlet of the ejector to an inlet of the condenser; and connecting the second inlet of the ejector to an evaporator of the air conditioning system.

Abstract: In certain embodiments an all vapor driven absorption heat pump is provided comprising a first heat pump generator comprising a falling film heat exchanger and configured to receive a high temperature vapor and a dilute working medium and to evaporate heat transport material from the dilute working medium; optionally, a second heat pump generator comprising a second falling film heat exchanger configured to receive concentrated working medium and output vapor produced in the first heat pump and to further evaporate the working medium and provide a mid-temperature vapor output and a concentrated working medium; and a heat pump absorber configured to receive a low temperature vapor and the concentrated working medium from the first heat pump generator when the second heat pump generator is absent and to receive said concentrated working medium from the second heat pump generator when the second heat pump generator is present.

Abstract: Device for cooling drinks with a drink supply container (30a, 30b) for a water-comprising drink, a cooling medium supply container (22) for holding at least one cooling medium, —dosing means adapted to dose a quantity of drink and a quantity of cooling medium required for cooling the dosed quantity of drink, a mixing chamber (36) for successively collecting a quantity of drink and a quantity of cooling medium respectively dosed by the dosing means, and—at least one stirring element (39), which stirring element is positioned relative to the mixing chamber (36) such that the stirring (39) element is adapted to generate a vortex in the drink present in the mixing chamber, wherein the stirring element (39) is also adapted to mix together drink present in the mixing chamber (36) and cooling medium present in the mixing chamber (36), wherein the cooling medium in the mixing chamber (36) undergoes a phase change to the gaseous state and/or an adiabatic expansion while cooling the drink.

Abstract: An automated vending machine that can be selectively configured to include one or several temperature zones. A single refrigeration system and universal interior allows easy and economical assembly into a one, two, or three temperature zone machine. Thermal breaks and dividers are used to partition zones, when needed. The basic vending machine cabinet, dispensers, and controls are not changed between configurations. In one aspect, a universal air duct can be used for all three configurations, with minor changes.

Abstract: The present disclosure provides a method of producing a mixed-phase environment. A plurality of supercooled liquid particles are dispersed into a fluid to form a first stream. A plurality of ice particles are dispersed into a fluid to form a second stream. The first and second streams are mixed to form a third stream. The present disclosure also provides a system for producing a mixed-phase environment. The system includes an ice generator, an ice disperser, a water disperser, a first fluid source coupled to the water dispenser, a second fluid source fluidly coupled to the ice disperser, a first flow chamber fluidly coupled to the first fluid source and having an outlet, a second flow chamber fluidly coupled to the second fluid source and having an outlet, and a third flow chamber that includes an inlet fluidly coupled to the outlets of the first and second flow chambers.

Abstract: A refrigeration system having a main circuit including a main compressor thermally coupled with a secondary or subcooling circuit. The main circuit uses a R125/R143A blend as a refrigerant and the subcooling circuit uses an R32 blend. The combined system of differing refrigerants provides increased efficiencies and reduced Global Warming Potential (GWP) over single refrigerant systems for low and medium temperature refrigeration applications.

Abstract: A system for desuperheating hot gaseous refrigerant using both a heat exchanger and a dispersed Venturi-driven injection of liquid refrigerant is disclosed. Further, a system, relating to cooling at least one compressed superheated refrigerant fluid prior to condensing, relating to extending the life of at least one condenser is disclosed.

Abstract: A test chamber that is capable of operating in a mode where the temperature of the chamber is efficiently cooled without removing a substantial amount of moisture from the air. In one aspect, the test chamber includes a structure defining a work space having air, and a temperature control system (e.g., a refrigeration system having a compressor, a condenser, and an evaporator valve). The temperature control system includes a heat exchanger (e.g., an evaporator) positioned to communicate with the air in the work space, a source of cold fluid (e.g., a compressed, condensed, and throttled refrigerant) coupled to the heat exchanger, a source of hot fluid (e.g., compressed refrigerant gas) coupled to the heat exchanger, and a controller for controlling a mixture of cold fluid and hot fluid entering the heat exchanger (e.g., by adjusting a cold fluid valve and/or a hot fluid valve).

Abstract: A compressor discharges a flow of compressed fluid at a predetermined temperature. The compressor includes a sensor positioned to measure a first temperature indicative of the temperature of the compressed fluid, a coolant source, a cooler positioned to receive a first flow of coolant from the coolant source and discharge a flow of cooled coolant, and a valve positioned to receive the flow of cooled coolant and a second flow of coolant from the coolant source. The valve is configured to discharge a coolant flow to the compressor and the coolant flow has a ratio of cooled coolant to second flow of coolant that is variable in response to the first temperature.

Abstract: A method of controlling the mixing of outside air and return air, entering an air handling unit, through inlets having dampers, the air handling unit having a coil for conditioning the incoming air and a fan for blowing the conditioned air into a conditioned space, the method including measuring the outside air temperature, and return air temperature, and a minimum coil temperature corresponding to a damper position calculating a correlation values from the outside air, return air, and a minimum temperatures determining a correlation function from the correlation value and damper positions, and using the correlation function to calculate the maximum damper position for an acceptable coil temperature.

Abstract: An air conditioning installation designed with regard to achieving a comfort temperature as well as meeting heat load requirements for a conditional space. The comfort temperature being dependent upon the velocity of the air flow in the space and the design being established by an iterative process until the comfort temperature differs from the exit temperature of the space within predetermined limits.

Abstract: A method of gas generation resides in transformation of a cryogenic agent, capable of passing to the supercritical state, from the liquid state to the gaseous state thereof by way of thermoinversion in an isochoric process with enhancement of the potential energy of pressure of the gaseous medium thus obtained, and reducing the shaped gas stream, this being followed by gasdynamic ejection of the ambient medium. A plant for effecting the method comprises a source of a working medium (a cryogenic agent), at least one chamber (1,2), a gas reducer (29) and a gas ejector (24), arranged in succession downstream and communicating with each other.

Abstract: A method and apparatus for conditioning the temperature and humidity of unrecycled ambient air within a certain climatic window of parameters to a desired point within a certain conditioned window of parameters is provided that comprise directing part of the ambient air through a cooling coil and humidifier connected in series and directing the other part of the ambient air through a bypass duct and recombining the bypass air with the conditioned air to create an air stream at the desired temperature and humidity. The air passing through the cooling coil and humidifier is overcooled and then brought to the desired condition upon combination with the bypass air.

Abstract: A single-pass method for accurate and precise temperature control in the -160.degree. to +90.degree. C. range, and which exhibited minimal set-point overshoot during temperature transitions. Control to .+-.2.degree. C. with transitions between set-points of 7.degree. C. per minute were achieved. The method uses commercially available temperature controllers and a gaseous nitrogen/liquid nitrogen mixer to dampen the amplitude of cold temperature spikes caused by liquid nitrogen pulsing.

Abstract: A device for cooling hot gases deriving from incomplete oxidation in a reactor and loaded with solids. A pressurized vessel (2) accommodates a refrigerator (1) made of cooled pipe-slab walls at the top and a water bath (6) for quench cooling at the bottom. A gas outlet (8) extends out of the refrigerator (1). Another gas outlet (13) extends out of the bath. The outlets can be independently blocked. The vessel also accommodates a gas-collecting section (7) upstream of the first gas outlet (8) and another gas-collecting section (12) upstream of the second gas outlet (13).

Abstract: The present invention relates to a method for combining at least two discrete flows of a refrigerant in respective substantially dissimilar thermodynamic states in a vapor compression cycle refrigeration system, including the step of imparting substantial turbulent mixing of the at least two flows to produce a generally thermodynamically uniform admixture thereof. The present invention also relates to an improved vapor compression cycle refrigeration apparatus including means for turbulent mixing of at least two discrete flows of a refrigerant in respective, substantially dissimilar thermodynamic states, which means is operable to produce a generally thermodynamically uniform admixture thereof. The means may be retrofitted to existing equipment and the present invention extends to kits useful to this end and to refrigeration sub-assemblies including such means.

Abstract: A refrigeration process is conducted by employing as the refrigerant a mixture of one or more hydrocarbons and one or more halocarbons. The boiling points of the components of the mixture are bracketed in such a manner that the flammability of the mixture is reduced.

Abstract: Apparatus for carrying out a combined absorption and adsorption process comprising an adsorber (1) housing adsorbent (30) (e.g. 13.times.

Abstract: A method of cooling air in a space and air conditioning apparatus for carrying out this method. Primary air at a temperature much below the temperatures used in conventional systems, is mixed with secondary drawn from the space, the mixture then being introduced into the space in order to cool it. Mixing takes place in a venturi diffuser or mixing device which enables a high induction ratio to be achieved. The system is more efficient and less costly to install and operate than the conventional systems. In one embodiment, some or all of the primary air may be drawn from the space, thereby avoiding the wasteful discharge of cold air to atmosphere.

Abstract: A simple climate control device is disclosed which can independently, or jointly, to the degree desired, ventilate and/or dehumidify and/or cool a dwelling. The device provides a way of supplying fresh outside air to a building or other space at a preferred humidity level while optionally cooling the inside air, and as desired dehumidifying the inside air to maintain the inside environment at a preferred temperature and at a preferred relative humidity, with gradual displacement of stale air by fresh air.