Abstract:
Heating, ventilation, air conditioning, and refrigeration (HVAC & R) systems and multi-slab heat exchangers are provided that include fluid connections for transmitting fluid between groups of tubes. The fluid connections may include generally tubular members fluidly connected to manifold sections. The fluid connections also may include partitioned manifolds containing tubes of different heights. Multichannel tubes are also provided that include a bent section configured to locate a flow path near a leading edge of a tube within one section and near a trailing edge of the tube within another section.
Abstract:
Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and heat exchangers are provided which contain integrated auxiliary cooling loops. The heat exchangers include multiple sets of multichannel tubes located on independent closed refrigeration loops. One closed loop functions as the main refrigeration loop of the system while another closed loop provides auxiliary cooling to system components. The closed loops are contained within the same heat exchanger, thus, allowing the auxiliary cooling loop to be integrated into an existing system.
Abstract:
Heating, ventilation, air conditioning, and refrigeration (HVAC & R) systems and heat exchangers are provided which include manifold configurations designed to promote mixing of vapor phase and liquid phase refrigerant. The manifolds contain flow mixers such as a helical tape, sectioned volumes, and partitions containing apertures. The flow mixers direct the flow of refrigerant within the manifold to promote a more homogenous distribution of fluid within the multichannel tubes.
Abstract:
Air cooled chillers having a condenser section (300) sized to match chiller capacity and auxiliary cooling requirements satisfied by use of an independent cooling coil (314) dedicated to providing auxiliary cooling. The independent cooling coil (314) is located within the current condenser (300), but utilizes available space within the existing condenser, as well as a small portion of the airflow driven by the existing condenser fan (320). Thus, the auxiliary cooling capacity is provided with a single dedicated coil design, but which otherwise uses existing equipment and space.
Abstract:
Heating, ventilation, air conditioning, and refrigeration (HVAC & R) systems, heat exchangers, and multichannel tubes are provided which include internal configurations designed to promote mixing. The multichannel tubes include interior walls which form flow channels. The interior walls are interrupted at locations along the multichannel tube in order to provide open spaces between the flow channels where mixing may occur. The mixing that occurs promotes a more homogenous distribution of refrigerant within the multichannel tubes.
Abstract:
Heating, ventilation, air conditioning, and refrigeration (HVAC & R) systems and multi-slab heat exchangers are provided that include fluid connections for transmitting fluid between groups of tubes. The fluid connections may include generally tubular members fluidly connected to manifold sections. The fluid connections also may include partitioned manifolds containing tubes of different heights. Multichannel tubes are also provided that include a bent section configured to locate a flow path near a leading edge of a tube within one section and near a trailing edge of the tube within another section.
Abstract:
An oil separator for use in separating oil from refrigerant gas in a chiller system is provided. Its operation is based on centrifugal separation principles and does not require the use any type of filter or media pack to remove oil from refrigerant gas. The oil separator includes a non-circular (e.g., elliptical) refrigerant outlet pipe that transitions the linear flow from the inlet connection to a swirling (e.g., circular) flow within the cylindrical housing. The non-circular shape of the entrance to the refrigerant outlet pipe provides for more turbulent gas flow and a greater extraction of oil as well as minimization of pressure losses.
Abstract:
A shell side condenser inlet diffuser (114) for a vapor compression refrigeration system is provided. The diffuser (114) includes an inlet (127) to receive a compressed refrigerant from a compressor of a refrigeration system. A chamber is in fluid communication with the inlet (127) to receive compressed refrigerant, the chamber having an upper side and a lower side and lateral sides bridging the upper and lower sides, the chamber having a plurality of openings (186,188) to discharge refrigerant inside the condenser (112). A protrusion (176) is disposed inside the chamber. The protrusion (176) and the chamber are configured and disposed to diffuse and direct a flow of refrigerant from the compressor to inside the condenser (112), the refrigerant leaving the chamber having a higher pressure level than the refrigerant entering the chamber.
Abstract:
A chiller system 10 includes a refrigerant loop 90, the refrigerant loop 90 further including a compressor 60, an air-cooled condenser arrangement 70 and an evaporator arrangement 80 connected in a first closed refrigerant loop 90. A motor 40 is connected to the compressor 60 to drive the compressor 60, a drive 30 is connected to the motor 40 to power the motor 40 and a power/control panel 50 controls the refrigerant loop 90. The power/control panel 50 and the condenser arrangement 70 are connected in a second closed coolant loop 100. The second closed coolant loop 100 provides cooling to the enclosure 120 and/or components 115 within the enclosure 120 disposed on a chill plate 110. Condensation is substantially prevented from forming inside the enclosure 120, despite the enclosure 120 lacking a humidity control device.
Abstract:
Air cooled chillers having a condenser section (300) sized to match chiller capacity and auxiliary cooling requirements satisfied by use of an independent cooling coil (314) dedicated to providing auxiliary cooling. The independent cooling coil (314) is located within the current condenser (300), but utilizes available space within the existing condenser, as well as a small portion of the airflow driven by the existing condenser fan (320). Thus, the auxiliary cooling capacity is provided with a single dedicated coil design, but which otherwise uses existing equipment and space.