A coil assembly for an evaporative refrigerant condenser having a plurality of nested pairs of serpentine heat exchange tubes tightly packed adjacent to one-another; each nested pair of serpentine heat exchange tubes having an outer serpentine tube and an inner serpentine tube having an identical number of straight lengths and having parallel vertical and horizontal axes.

A heating, ventilation, air conditioning and refrigeration (HVAC&R) unit includes an evaporator circulating a flow of refrigerant therethrough to cool a flow of compartment air flowing over the evaporator, and a condenser operably connected to the evaporator to condense the flow of refrigerant therethrough. The evaporator and the condenser are relatively positioned such that a liquid condensate at an exterior of the evaporator is directed by gravity onto an exterior of the condenser to increase an operating capacity of the condenser.

A liquid accumulator for a heat exchange system, includes a liquid accumulator housing provided with an air inlet, an air outlet, and a liquid inlet; and a cooling heat exchanger disposed in the liquid accumulator housing, wherein the cooling heat exchanger comprises an inlet end, a main body part, and an outlet end in sequence; the inlet end of the cooling heat exchanger is connected to the air inlet on the liquid accumulator housing; and the outlet end of the cooling heat exchanger is arranged to be higher than a working liquid level of a refrigerant in the liquid accumulator.

The present invention makes it possible in a centrifugal chiller utilizing a low pressure refrigerant used at a maximum pressure of less than 0.2 MPaG to effectively extract, in high concentration, non-condensible gas that has mixed into the low pressure refrigerant, and thus suppresses reductions in condensing efficiency. This condenser (3) is equipped with: a shell vessel (21) into which a low pressure refrigerant used at a maximum pressure of less than 0.2 MPaG is introduced; a refrigerant inlet (22) which is provided to the top portion of the shell vessel (21); a refrigerant outlet (23) which is provided to the bottom portion of the shell vessel (21); a heat transfer tube bundle (25) in which a plurality of heat transfer tubes (25a) circulating a chilled liquid in the interior thereof are bundled, and which extends along the interior of the shell vessel (21); a gas extraction tube (31) in the heat transfer tube bundle interior, the gas extraction tube being disposed in the center region in the radial direction of the heat transfer tube bundle (25), forming a tubular shape arranged parallel to the axial direction of the heat transfer tube bundle (25), and having formed in the bottom surface thereof non-condensible gas extraction holes (31a) for extracting non-condensible gas that has mixed into the low pressure refrigerant; and a gas extraction device (33) which is connected to the gas extraction tube (31) in the heat transfer tube bundle interior and extracts the non-condensible gas.

According to another aspect, the present disclosure relates to a system for modular adiabatic evaporative pre-cooling of an existing air conditioning condenser unit. The system includes an evaporative media with an air permeable construction. The evaporative media has a water absorbable construction. The system also has a water supply port for supplying the volume of water. The system also has a water distributer for distributing the volume of water supplied from the water supply port. The water distributer distributes the volume of water to the evaporative media. The system also includes a water drain port for draining the volume of water distributed to the evaporative media.

A heat exchanger including at least one first module and one second module for the heat exchange between a first fluid medium and a second fluid medium, wherein the first fluid medium can be conducted through a closed channel system separate from the second fluid medium, with the closed channel system being able to be flowed around by the second fluid medium and with the second fluid medium being gaseous. A first wetting apparatus is provided for the first module and a second wetting apparatus is provided for the second module by means of which the first module and the second module can be wetted by a third fluid medium, with the first wetting apparatus for the first module being able to be actuated independently of the wetting apparatus for the second module.

A packaged, pumped liquid, evaporative-condensing recirculating ammonia refrigeration system with charges of 10 lbs or less of refrigerant per ton of refrigeration capacity. The compressor and related components are situated inside the plenum of a standard evaporative condenser unit, and the evaporator is close coupled to the evaporative condenser. Single or dual phase cyclonic separators may also be housed in the plenum of the evaporative condenser.

An adiabatic condenser or fluid cooler is provided. A condensing or fluid cooling coil is provided. An adiabatic pad is provided wherein water can be used to cool the ambient air before entering or impacting the condensing or fluid cooling coil. Controls are provided that can adjust or eliminate the amount of water flowing over the adiabatic pad. The adiabatic pad may also be physically moved to allow ambient air to directly impact the condensing or fluid cooling coil.

A freezer includes a plurality of connecting pipes, a first freezer casing having a first storage compartment, a first compressor, a first evaporator received in the first freezer casing, and an evaporative condensing arrangement comprising an evaporative cooling unit. The evaporative cooling unit includes a first heat exchanger, a water pumping device, a water distribution apparatus, a water collection basin, and a cooling fan. A predetermined amount of refrigerant is guided to circulate between the first evaporator, the first compressor and the heat exchanger. A predetermined amount of cooling water is sprayed on the heat exchanger for performing heat exchange with the refrigerant flowing therethrough, wherein the cooling water is cooled by the ambient air which is drawn from an air inlet and flows out of the evaporative cooling unit through an air outlet.

An evaporative condenser for use in a refrigeration system includes an inclined plate-like refrigerant cooling portion for cooling and condensing refrigerant, an inclined plate-like water spraying portion for spraying the cooling portion with cooling water to cool the refrigerant cooling portion, a casing having an air inlet for taking in air, an air outlet for discharging air, and a draft fan for generating airflow from the air inlet to the air outlet inside the casing. The refrigerant cooling portion has multiple condenser coils arranged in an inclined manner with respect to the horizontal direction to cool the refrigerant while causing the refrigerant to flow downward therethrough. The water spraying portion has multiple water spraying nozzles arranged in an inclined manner along the condenser coils to spray the condenser coils with cooling water. The evaporative condenser efficiently condenses and devolatilizes gaseous refrigerant delivered sequentially after circulating in a condensing cooling cycle.